/*
% Copyright (C) 2003-2018 GraphicsMagick Group
% Copyright (C) 2002 ImageMagick Studio
% Copyright 1991-1999 E. I. du Pont de Nemours and Company
%
% This program is covered by multiple licenses, which are described in
% Copyright.txt. You should have received a copy of Copyright.txt with this
% package; otherwise see http://www.graphicsmagick.org/www/Copyright.html.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%                        DDDD   RRRR    AAA   W   W                           %
%                        D   D  R   R  A   A  W   W                           %
%                        D   D  RRRR   AAAAA  W   W                           %
%                        D   D  R R    A   A  W W W                           %
%                        DDDD   R  R   A   A   W W                            %
%                                                                             %
%                                                                             %
%                 GraphicsMagick Image Vector Drawing Methods                 %
%                                                                             %
%                                                                             %
%                              Software Design                                %
%                              Bob Friesenhahn                                %
%                                March 2002                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/

/*
  Include declarations.
*/
#include "magick/studio.h"
#include "magick/attribute.h"
#include "magick/blob.h"
#include "magick/color.h"
#include "magick/color_lookup.h"
#include "magick/draw.h"
#include "magick/enum_strings.h"
#include "magick/gem.h"
#include "magick/log.h"
#include "magick/magick.h"
#include "magick/monitor.h"
#include "magick/utility.h"

/*
  Define declarations.
*/
#define DRAW_BINARY_IMPLEMENTATION 0

#define ThrowDrawException(code,reason,description) \
{ \
  if (context->image->exception.severity > (long)code) \
    ThrowException(&context->image->exception,code,reason,description); \
  return; \
}
#define ThrowDrawException3(code,reason,description) \
{ \
  if (context->image->exception.severity > (long)code) \
    ThrowException3(&context->image->exception,code,reason,description); \
  return; \
}

#define CurrentContext (context->graphic_context[context->index])
#define PixelPacketMatch(p,q) (((p)->red == (q)->red) && \
  ((p)->green == (q)->green) && ((p)->blue == (q)->blue) && \
  ((p)->opacity == (q)->opacity))

/*
  Typedef declarations.
*/
typedef enum
{
  PathDefaultOperation,
  PathCloseOperation,                           /* Z|z (none) */
  PathCurveToOperation,                         /* C|c (x1 y1 x2 y2 x y)+ */
  PathCurveToQuadraticBezierOperation,          /* Q|q (x1 y1 x y)+ */
  PathCurveToQuadraticBezierSmoothOperation,    /* T|t (x y)+ */
  PathCurveToSmoothOperation,                   /* S|s (x2 y2 x y)+ */
  PathEllipticArcOperation,                     /* A|a (rx ry x-axis-rotation large-arc-flag sweep-flag x y)+ */
  PathLineToHorizontalOperation,                /* H|h x+ */
  PathLineToOperation,                          /* L|l (x y)+ */
  PathLineToVerticalOperation,                  /* V|v y+ */
  PathMoveToOperation                           /* M|m (x y)+ */
} PathOperation;

typedef enum
{
  DefaultPathMode,
  AbsolutePathMode,
  RelativePathMode
} PathMode;

struct _DrawContext
{
  /* Support structures */
  Image
    *image;

  /* MVG output string and housekeeping */
  char
    *mvg;               /* MVG data */

  size_t
    mvg_alloc,          /* total allocated memory */
    mvg_length;         /* total MVG length */

  unsigned int
    mvg_width;          /* current line length */

  /* Pattern support */
  char
    *pattern_id;

  RectangleInfo
    pattern_bounds;

  size_t
    pattern_offset;

  /* Graphic context */
  unsigned int
    index;              /* array index */

  DrawInfo
    **graphic_context;

  int
    filter_off;         /* true if not filtering attributes */

  /* Pretty-printing depth */
  unsigned int
    indent_depth;       /* number of left-hand pad characters */

  /* Path operation support */
  PathOperation
    path_operation;

  PathMode
    path_mode;

  /* Structure unique signature */
  unsigned long
    signature;
};

/* Vector table for invoking subordinate renderers */
#if 0
struct _DrawVTable
{
  void (*DrawAnnotation)
    (DrawContext context, const double x, const double y,
     const unsigned char *text);
  void (*DrawArc)
    (DrawContext context, const double sx, const double sy,
     const double ex, const double ey, const double sd, const double ed);
  void (*DrawBezier)
    (DrawContext context, const unsigned long num_coords, const PointInfo *coordinates);
  void (*DrawCircle)
    (DrawContext context, const double ox, const double oy,
     const double px, const double py);
  void (*DrawColor)
    (DrawContext context, const double x, const double y,
     const PaintMethod paintMethod);
  void (*DrawComment)
    (DrawContext context,const char* comment);
  void (*DrawDestroyContext)
    (DrawContext context);
  void (*DrawEllipse)
    (DrawContext context, const double ox, const double oy,
     const double rx, const double ry, const double start, const double end);
  void (*DrawComposite)
    (DrawContext context, const CompositeOperator composite_operator,
     const double x, const double y, const double width, const double height,
     const Image * image );
  void (*DrawLine)
    (DrawContext context, const double sx, const double sy,
     const double ex, const double ey);
  void (*DrawMatte)
    (DrawContext context, const double x, const double y,
     const PaintMethod paint_method);
  void (*DrawPathClose)
    (DrawContext context);
  void (*DrawPathCurveToAbsolute)
    (DrawContext context, const double x1, const double y1,
     const double x2, const double y2, const double x, const double y);
  void (*DrawPathCurveToRelative)
    (DrawContext context, const double x1, const double y1,
     const double x2, const double y2, const double x, const double y);
  void (*DrawPathCurveToQuadraticBezierAbsolute)
    (DrawContext context, const double x1, const double y1,
     const double x, const double y);
  void (*DrawPathCurveToQuadraticBezierRelative)
    (DrawContext context, const double x1, const double y1,
     const double x, const double y);
  void (*DrawPathCurveToQuadraticBezierSmoothAbsolute)
    (DrawContext context, const double x, const double y);
  void (*DrawPathCurveToQuadraticBezierSmoothRelative)
    (DrawContext context, const double x, const double y);
  void (*DrawPathCurveToSmoothAbsolute)
    (DrawContext context, const double x2, const double y2,
     const double x, const double y);
  void (*DrawPathCurveToSmoothRelative)
    (DrawContext context, const double x2, const double y2,
     const double x, const double y);
  void (*DrawPathEllipticArcAbsolute)
    (DrawContext context, const double rx, const double ry,
     const double x_axis_rotation, unsigned int large_arc_flag,
     unsigned int sweep_flag, const double x, const double y);
  void (*DrawPathEllipticArcRelative)
    (DrawContext context, const double rx, const double ry,
     const double x_axis_rotation, unsigned int large_arc_flag,
     unsigned int sweep_flag, const double x, const double y);
  void (*DrawPathFinish)
    (DrawContext context);
  void (*DrawPathLineToAbsolute)
    (DrawContext context, const double x, const double y);
  void (*DrawPathLineToRelative)
    (DrawContext context, const double x, const double y);
  void (*DrawPathLineToHorizontalAbsolute)
    (DrawContext context, const double x);
  void (*DrawPathLineToHorizontalRelative)
    (DrawContext context, const double x);
  void (*DrawPathLineToVerticalAbsolute)
    (DrawContext context, const double y);
  void (*DrawPathLineToVerticalRelative)
    (DrawContext context, const double y);
  void (*DrawPathMoveToAbsolute)
    (DrawContext context, const double x, const double y);
  void (*DrawPathMoveToRelative)
    (DrawContext context, const double x, const double y);
  void (*DrawPathStart)
    (DrawContext context);
  void (*DrawPoint)
    (DrawContext context, const double x, const double y);
  void (*DrawPolygon)
    (DrawContext context, const unsigned long num_coords, const PointInfo * coordinates);
  void (*DrawPolyline)
    (DrawContext context, const unsigned long num_coords, const PointInfo * coordinates);
  void (*DrawPopClipPath)
    (DrawContext context);
  void (*DrawPopDefs)
    (DrawContext context);
  void (*DrawPopGraphicContext)
    (DrawContext context);
  void (*DrawPopPattern)
    (DrawContext context);
  void (*DrawPushClipPath)
    (DrawContext context, const char *clip_path_id);
  void (*DrawPushDefs)
    (DrawContext context);
  void (*DrawPushGraphicContext)
    (DrawContext context);
  void (*DrawPushPattern)
    (DrawContext context, const char *pattern_id,
     const double x, const double y, const double width, const double height);
  void (*DrawRectangle)
    (DrawContext context, const double x1, const double y1,
     const double x2, const double y2);
  void (*DrawRoundRectangle)
    (DrawContext context, double x1, double y1,
     double x2, double y2, double rx, double ry);
  void (*DrawAffine)
    (DrawContext context, const AffineMatrix *affine);
  void (*DrawSetClipPath)
    (DrawContext context, const char *clip_path);
  void (*DrawSetClipRule)
    (DrawContext context, const FillRule fill_rule);
  void (*DrawSetClipUnits)
    (DrawContext context, const ClipPathUnits clip_units);
  void (*DrawSetFillColor)
    (DrawContext context, const PixelPacket * fill_color);
  void (*DrawSetFillOpacity)
    (DrawContext context, const double fill_opacity);
  void (*DrawSetFillRule)
    (DrawContext context, const FillRule fill_rule);
  void (*DrawSetFillPatternURL)
    (DrawContext context, const char* fill_url);
  void (*DrawSetFont)
    (DrawContext context, const char *font_name);
  void (*DrawSetFontFamily)
    (DrawContext context, const char *font_family);
  void (*DrawSetFontSize)
    (DrawContext context, const double font_pointsize);
  void (*DrawSetFontStretch)
    (DrawContext context, const StretchType font_stretch);
  void (*DrawSetFontStyle)
    (DrawContext context, const StyleType font_style);
  void (*DrawSetFontWeight)
    (DrawContext context, const unsigned long font_weight);
  void (*DrawSetGravity)
    (DrawContext context, const GravityType gravity);
  void (*DrawRotate)
    (DrawContext context, const double degrees);
  void (*DrawScale)
    (DrawContext context, const double x, const double y);
  void (*DrawSkewX)
    (DrawContext context, const double degrees);
  void (*DrawSkewY)
    (DrawContext context, const double degrees);
/*   void (*DrawSetStopColor) */
/*     (DrawContext context, const PixelPacket * color, const double offset); */
  void (*DrawSetStrokeAntialias)
    (DrawContext context, const unsigned int true_false);
  void (*DrawSetStrokeColor)
    (DrawContext context, const PixelPacket * stroke_color);
  void (*DrawSetStrokeDashArray)
    (DrawContext context,const double *dasharray);
  void (*DrawSetStrokeDashOffset)
    (DrawContext context,const double dashoffset);
  void (*DrawSetStrokeLineCap)
    (DrawContext context, const LineCap linecap);
  void (*DrawSetStrokeLineJoin)
    (DrawContext context, const LineJoin linejoin);
  void (*DrawSetStrokeMiterLimit)
    (DrawContext context,const unsigned long miterlimit);
  void (*DrawSetStrokeOpacity)
    (DrawContext context, const double opacity);
  void (*DrawSetStrokePatternURL)
    (DrawContext context, const char* stroke_url);
  void (*DrawSetStrokeWidth)
    (DrawContext context, const double width);
  void (*DrawSetTextAntialias)
    (DrawContext context, const unsigned int true_false);
  void (*DrawSetTextDecoration)
    (DrawContext context, const DecorationType decoration);
  void (*DrawSetTextUnderColor)
    (DrawContext context, const PixelPacket * color);
  void (*DrawTranslate)
    (DrawContext context, const double x, const double y);
  void (*DrawSetViewbox)
    (DrawContext context, unsigned long x1, unsigned long y1,
     unsigned long x2, unsigned long y2);
};
#endif

/*
  Forward declarations.
*/
static int
  MvgPrintf(DrawContext context, const char *format, ...)
#if defined(__GNUC__)
MAGICK_ATTRIBUTE ((format (printf, 2, 3)))
#endif
,
  MvgAutoWrapPrintf(DrawContext context, const char *format, ...)
#if defined(__GNUC__)
MAGICK_ATTRIBUTE ((format (printf, 2, 3)))
#endif
;
static void
  MvgAppendColor(DrawContext context, const PixelPacket *color);


/* "Printf" for MVG commands */
static int MvgPrintf(DrawContext context, const char *format, ...)
{
  const size_t
    alloc_size = MaxTextExtent * 20; /* 40K */

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  /* Allocate initial memory */
  if (context->mvg == (char*) NULL)
    {
      context->mvg = MagickAllocateMemory(char *,alloc_size);
      if( context->mvg == (char*) NULL )
        {
          ThrowException3(&context->image->exception,ResourceLimitError,
            MemoryAllocationFailed,UnableToDrawOnImage);
          return -1;
        }

      context->mvg_alloc = alloc_size;
      context->mvg_length = 0;
      if (context->mvg == 0)
        {
          ThrowException3(&context->image->exception,ResourceLimitError,
            MemoryAllocationFailed,UnableToDrawOnImage);
          return -1;
        }
    }

  /* Re-allocate additional memory if necessary (ensure 20K unused) */
  if (context->mvg_alloc < (context->mvg_length + MaxTextExtent * 10))
    {
      size_t realloc_size = context->mvg_alloc + alloc_size;

      MagickReallocMemory(char *, context->mvg, realloc_size);
      if (context->mvg == NULL)
        {
          ThrowException3(&context->image->exception,ResourceLimitError,
            MemoryAllocationFailed,UnableToDrawOnImage);
          return -1;
        }
      context->mvg_alloc = realloc_size;
    }

  /* Write to end of existing MVG string */
  {
    int
      formatted_length; /* must be a signed type! */

    va_list
      argp;

    /* Pretty-print indentation */
    while(context->mvg_width < context->indent_depth)
      {
        context->mvg[context->mvg_length] = ' ';
        ++context->mvg_length;
        ++context->mvg_width;
      }
    context->mvg[context->mvg_length] = 0;

    /*
      According to C99, vsnprintf() returns the number of formatted
      bytes which WOULD have been written (not including trailing
      '\0') if there was sufficient space available.  If an output
      error occurs, then a negative value is returned.

      Under Linux glibc 2.0.6 and earlier, -1 is returned when the
      output has been truncated.
    */
    {
      ssize_t
        space_available;

      space_available=(ssize_t) context->mvg_alloc - (ssize_t) context->mvg_length - 1;
      formatted_length = -1;
      if (space_available > 0)
        {
          va_start(argp, format);
#if defined(HAVE_VSNPRINTF)
          formatted_length =
            vsnprintf(context->mvg + context->mvg_length,(size_t) space_available, format, argp);
#else
#  if defined(HAVE_VSPRINTF)
          formatted_length = vsprintf(context->mvg + context->mvg_length, format, argp);
#  else
#    error Neither vsnprintf or vsprintf is available.
#  endif
#endif
          va_end(argp);
        }

      if ((formatted_length < 0) || (formatted_length > space_available))
        {
          ThrowException(&context->image->exception,DrawError,UnableToPrint,
                         format);
        }
      else
        {
          context->mvg_length += formatted_length;
          context->mvg_width += formatted_length;
        }
    }
    context->mvg[context->mvg_length] = 0;

    /* Re-evaluate mvg_width */
    if( (context->mvg_length > 1) &&
        (context->mvg[context->mvg_length-1] == '\n') )
      context->mvg_width = 0;

    assert(context->mvg_length + 1 < context->mvg_alloc);

    return formatted_length;
  }
}

/* "Printf" for MVG commands, with autowrap at 78 characters */
static int MvgAutoWrapPrintf(DrawContext context, const char *format, ...)
{
  va_list
    argp;

  int
    formatted_length;

  char
    buffer[MaxTextExtent];

  va_start(argp, format);
#if defined(HAVE_VSNPRINTF)
  formatted_length = vsnprintf(buffer, sizeof(buffer) - 1, format, argp);
#else
#  if defined(HAVE_VSPRINTF)
  formatted_length = vsprintf(buffer, format, argp);
#  else
#    error Neither vsnprintf or vsprintf is available.
#  endif
#endif
  va_end(argp);
  buffer[sizeof(buffer)-1]=0;

  if (formatted_length < 0)
    {
      ThrowException(&context->image->exception,DrawError,UnableToPrint,
        format);
    }
  else
    {
      if( ((context->mvg_width + formatted_length) > 78) &&
          buffer[formatted_length-1] != '\n' )
        (void) MvgPrintf(context, "\n");

      (void) MvgPrintf(context, "%s", buffer);
    }

  return formatted_length;
}

static void MvgAppendColor(DrawContext context, const PixelPacket *color)
{
  if(color->red == 0U && color->green == 0U && color->blue == 0U &&
     color->opacity == TransparentOpacity)
    {
      (void) MvgPrintf(context,"none");
    }
  else
    {
      char
        tuple[MaxTextExtent];

      GetColorTuple(color,context->image->depth,context->image->matte,True,
                    tuple);
      (void) MvgPrintf(context,"%.1024s",tuple);
    }
}

static void MvgAppendPointsCommand(DrawContext context, const char* command,
                                   const unsigned long num_coords,
                                   const PointInfo * coordinates)
{
  const PointInfo
    *coordinate;

  size_t
    i;

  (void) MvgPrintf(context, "%.1024s", command);
  for (i = num_coords, coordinate = coordinates; i; i--)
    {
      (void) MvgAutoWrapPrintf(context," %g,%g", coordinate->x, coordinate->y);
      ++coordinate;
    }

  (void) MvgPrintf(context, "\n");
}

static void AdjustAffine(DrawContext context, const AffineMatrix *affine)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if ((affine->sx != 1.0) || (affine->rx != 0.0) || (affine->ry != 0.0) ||
      (affine->sy != 1.0) || (affine->tx != 0.0) || (affine->ty != 0.0))
    {
      AffineMatrix
        current;

      current = CurrentContext->affine;
      CurrentContext->affine.sx=current.sx*affine->sx+current.ry*affine->rx;
      CurrentContext->affine.rx=current.rx*affine->sx+current.sy*affine->rx;
      CurrentContext->affine.ry=current.sx*affine->ry+current.ry*affine->sy;
      CurrentContext->affine.sy=current.rx*affine->ry+current.sy*affine->sy;
      CurrentContext->affine.tx=current.sx*affine->tx+current.ry*affine->ty+current.tx;
      CurrentContext->affine.ty=current.rx*affine->tx+current.sy*affine->ty+current.ty;
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w A n n o t a t i o n                                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawAnnotation() draws text on the image.
%
%  The format of the DrawAnnotation method is:
%
%      void DrawAnnotation(DrawContext context,
%                          const double x, const double y,
%                          const unsigned char *text)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x: x ordinate to left of text
%
%    o y: y ordinate to text baseline
%
%    o text: text to draw
%
*/
MagickExport void DrawAnnotation(DrawContext context,
                                 const double x, const double y,
                                 const unsigned char *text)
{
  char
    *escaped_text;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);
  assert(text != (const unsigned char *) NULL);

  escaped_text=EscapeString((const char*)text,'\'');
  if (escaped_text != (char *) NULL)
    {
      (void) MvgPrintf(context, "text %g,%g '%s'\n", x, y, escaped_text);
      MagickFreeMemory(escaped_text);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w A f f i n e                                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawAffine() adjusts the current affine transformation matrix with
%  the specified affine transformation matrix. Note that the current affine
%  transform is adjusted rather than replaced.
%
%  The format of the DrawAffine method is:
%
%      void DrawAffine(DrawContext context, const AffineMatrix *affine)
%
%  A description of each parameter follows:
%
%    o context: Drawing context
%
%    o affine: Affine matrix parameters
%
*/
MagickExport void DrawAffine(DrawContext context, const AffineMatrix *affine)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);
  assert(affine != (const AffineMatrix *)NULL);

  AdjustAffine( context, affine );

  (void) MvgPrintf(context, "affine %.6g,%.6g,%.6g,%.6g,%.6g,%.6g\n",
                   affine->sx, affine->rx, affine->ry, affine->sy,
                   affine->tx, affine->ty);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w A l l o c a t e C o n t e x t                                     %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawAllocateContext() allocates an initial drawing context which is an
%  opaque handle required by the remaining drawing methods.
%
%  The format of the DrawAllocateContext method is:
%
%      DrawContext DrawAllocateContext(const DrawInfo *draw_info,
%                                      Image *image)
%
%  A description of each parameter follows:
%
%    o draw_info: Initial drawing defaults. Set to NULL to use
%                 GraphicsMagick defaults.
%
%    o image: The image to draw on.
%
*/
MagickExport DrawContext DrawAllocateContext(const DrawInfo *draw_info,
                                             Image *image)
{
  DrawContext
    context;

  /* Allocate initial drawing context */
  context = MagickAllocateMemory(DrawContext,sizeof(struct _DrawContext));
  if(context == (DrawContext) NULL)
    MagickFatalError3(ResourceLimitFatalError,MemoryAllocationFailed,
      UnableToAllocateDrawContext);

  /* Support structures */
  context->image = image;

  /* MVG output string and housekeeping */
  context->mvg = NULL;
  context->mvg_alloc = 0;
  context->mvg_length = 0;
  context->mvg_width = 0;

  /* Pattern support */
  context->pattern_id = NULL;
  context->pattern_offset = 0;

  context->pattern_bounds.x = 0;
  context->pattern_bounds.y = 0;
  context->pattern_bounds.width = 0;
  context->pattern_bounds.height = 0;

  /* Graphic context */
  context->index = 0;
  context->graphic_context=MagickAllocateMemory(DrawInfo **,sizeof(DrawInfo *));
  if(context->graphic_context == (DrawInfo **) NULL)
    {
      ThrowException3(&context->image->exception,ResourceLimitError,
        MemoryAllocationFailed,UnableToDrawOnImage);
      return (DrawContext) NULL;
    }
  CurrentContext=CloneDrawInfo((ImageInfo*)NULL,draw_info);
  if(CurrentContext == (DrawInfo*) NULL)
    {
      ThrowException3(&context->image->exception,ResourceLimitError,
        MemoryAllocationFailed,UnableToDrawOnImage);
      return (DrawContext) NULL;
    }

  context->filter_off = False;

  /* Pretty-printing depth */
  context->indent_depth = 0;

  /* Path operation support */
  context->path_operation = PathDefaultOperation;
  context->path_mode = DefaultPathMode;

  /* Structure unique signature */
  context->signature = MagickSignature;

  return context;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w A r c                                                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawArc() draws an arc falling within a specified bounding rectangle on the
%  image.
%
%  The format of the DrawArc method is:
%
%      void DrawArc(DrawContext context,
%                   const double sx, const double sy,
%                   const double ex, const double ey,
%                   const double sd, const double ed)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o sx: starting x ordinate of bounding rectangle
%
%    o sy: starting y ordinate of bounding rectangle
%
%    o ex: ending x ordinate of bounding rectangle
%
%    o ey: ending y ordinate of bounding rectangle
%
%    o sd: starting degrees of rotation
%
%    o ed: ending degrees of rotation
%
*/
MagickExport void DrawArc(DrawContext context,
                          const double sx, const double sy,
                          const double ex, const double ey,
                          const double sd, const double ed)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  (void) MvgPrintf(context, "arc %g,%g %g,%g %g,%g\n",
                   sx, sy, ex, ey, sd, ed);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w B e z i e r                                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawBezier() draws a bezier curve through a set of points on the image.
%
%  The format of the DrawBezier method is:
%
%      void DrawBezier(DrawContext context, const unsigned long num_coords,
%                      const PointInfo *coordinates)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o num_coords: number of coordinates
%
%    o coordinates: coordinates
%
*/
MagickExport void DrawBezier(DrawContext context, const unsigned long num_coords,
                             const PointInfo *coordinates)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);
  assert(coordinates != (const PointInfo *) NULL);

  MvgAppendPointsCommand(context,"bezier",num_coords,coordinates);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w C i r c l e                                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawCircle() draws a circle on the image.
%
%  The format of the DrawCircle method is:
%
%      void DrawCircle(DrawContext context, const double ox,
%                      const double oy, const double px, const double py)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o ox: origin x ordinate
%
%    o oy: origin y ordinate
%
%    o px: perimeter x ordinate
%
%    o py: perimeter y ordinate
%
*/
MagickExport void DrawCircle(DrawContext context, const double ox,
                             const double oy, const double px, const double py)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  (void) MvgPrintf(context, "circle %g,%g %g,%g\n", ox, oy, px, py);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t C l i p P a t h                                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetClipPath() obtains the current clipping path ID. The value returned
%  must be deallocated by the user when it is no longer needed.
%
%  The format of the DrawGetClipPath method is:
%
%      char *DrawGetClipPath(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport char *DrawGetClipPath(DrawContext context)
{
  char * pClipPath;
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  pClipPath = *DrawInfoGetClipPath(CurrentContext);
  if (pClipPath != (char *) NULL)
    return (char *)AllocateString(pClipPath);
  else
    return (char *) NULL;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t C l i p P a t h                                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetClipPath() associates a named clipping path with the image.  Only
%  the areas drawn on by the clipping path will be modified as long as it
%  remains in effect.
%
%  The format of the DrawSetClipPath method is:
%
%      void DrawSetClipPath(DrawContext context, const char *clip_path)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o clip_path: name of clipping path to associate with image
%
*/
MagickExport void DrawSetClipPath(DrawContext context, const char *clip_path)
{
  char ** ppClipPath,*pClipPath;
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);
  assert(clip_path != (const char *) NULL);

  pClipPath = *(ppClipPath = DrawInfoGetClipPath(CurrentContext));
  if( pClipPath == NULL || context->filter_off ||
      LocaleCompare(pClipPath,clip_path) != 0)
    {
      (void) CloneString(ppClipPath,clip_path);
      if(*ppClipPath == (char*)NULL)
        ThrowDrawException3(ResourceLimitError,MemoryAllocationFailed,
          UnableToDrawOnImage);

#if DRAW_BINARY_IMPLEMENTATION
      (void) DrawClipPath(context->image,CurrentContext,pClipPath);
#endif

      (void) MvgPrintf(context, "clip-path url(#%s)\n", clip_path);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t C l i p R u l e                                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetClipRule() returns the current polygon fill rule to be used by the
%  clipping path.
%
%  The format of the DrawGetClipRule method is:
%
%     FillRule DrawGetClipRule(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport FillRule DrawGetClipRule(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return CurrentContext->fill_rule;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t C l i p R u l e                                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetClipRule() set the polygon fill rule to be used by the clipping path.
%
%  The format of the DrawSetClipRule method is:
%
%      void DrawSetClipRule(DrawContext context,
%                           const FillRule fill_rule)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o fill_rule: fill rule (EvenOddRule or NonZeroRule)
%
*/
MagickExport void DrawSetClipRule(DrawContext context,
                                  const FillRule fill_rule)
{
  const char
    *p = NULL;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if(context->filter_off || (CurrentContext->fill_rule != fill_rule))
    {
      CurrentContext->fill_rule = fill_rule;

      switch (fill_rule)
        {
        case EvenOddRule:
          p = "evenodd";
          break;
        case NonZeroRule:
          p = "nonzero";
          break;
        default:
          break;
        }

      if (p != NULL)
        (void) MvgPrintf(context, "clip-rule %s\n", p);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t C l i p U n i t s                                           %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetClipUnits() returns the interpretation of clip path units.
%
%  The format of the DrawGetClipUnits method is:
%
%      ClipPathUnits DrawGetClipUnits(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport ClipPathUnits DrawGetClipUnits(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return CurrentContext->clip_units;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t C l i p U n i t s                                           %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetClipUnits() sets the interpretation of clip path units.
%
%  The format of the DrawSetClipUnits method is:
%
%      void DrawSetClipUnits(DrawContext context,
%                            const ClipPathUnits clip_units)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o clip_units: units to use (UserSpace, UserSpaceOnUse, or ObjectBoundingBox)
%
*/
MagickExport void DrawSetClipUnits(DrawContext context,
                                   const ClipPathUnits clip_units)
{
  const char
    *p = NULL;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if(context->filter_off || (CurrentContext->clip_units != clip_units))
    {
      CurrentContext->clip_units = clip_units;

      if ( clip_units == ObjectBoundingBox )
        {
          AffineMatrix
            affine;

          IdentityAffine(&affine);

          affine.sx=CurrentContext->bounds.x2;
          affine.sy=CurrentContext->bounds.y2;
          affine.tx=CurrentContext->bounds.x1;
          affine.ty=CurrentContext->bounds.y1;

          AdjustAffine( context, &affine );
        }

      switch (clip_units)
        {
        case UserSpace:
          p = "userSpace";
          break;
        case UserSpaceOnUse:
          p = "userSpaceOnUse";
          break;
        case ObjectBoundingBox:
          p = "objectBoundingBox";
          break;
        }

      if (p != NULL)
        (void) MvgPrintf(context, "clip-units %s\n", p);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w C o l o r                                                         %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawColor() draws color on image using the current fill color, starting at
%  specified position, and using specified paint method. The available paint
%  methods are:
%
%    PointMethod: Recolors the target pixel
%    ReplaceMethod: Recolor any pixel that matches the target pixel.
%    FloodfillMethod: Recolors target pixels and matching neighbors.
%    FillToBorderMethod: Recolor target pixels and neighbors not matching border color.
%    ResetMethod: Recolor all pixels.
%
%  The format of the DrawColor method is:
%
%      void DrawColor(DrawContext context,
%                     const double x, const double y,
%                     const PaintMethod paintMethod)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x: x ordinate
%
%    o y: y ordinate
%
%    o paintMethod: paint method
%
*/
MagickExport void DrawColor(DrawContext context,
                            const double x, const double y,
                            const PaintMethod paintMethod)
{
  const char
    *p = NULL;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  switch (paintMethod)
    {
    case PointMethod:
      p = "point";
      break;
    case ReplaceMethod:
      p = "replace";
      break;
    case FloodfillMethod:
      p = "floodfill";
      break;
    case FillToBorderMethod:
      p = "filltoborder";
      break;
    case ResetMethod:
      p = "reset";
      break;
    }

  if (p != NULL)
    (void) MvgPrintf(context, "color %g,%g %s\n", x, y, p);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w C o m m e n t                                                     %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawComment() adds a comment to a vector output stream.
%
%  The format of the DrawComment method is:
%
%      void DrawComment(DrawContext context,const char* comment)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o comment: comment text
%
*/
MagickExport void DrawComment(DrawContext context,const char* comment)
{
  /* FIXME: should handle multi-line comments by inserting # before
     new lines */
  (void) MvgPrintf(context, "#%s\n", comment);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w D e s t r o y C o n t e x t                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawDestroyContext() frees all resources associated with the drawing
%  context. Once the drawing context has been freed, it should not be used
%  any further unless it re-allocated.
%
%  The format of the DrawDestroyContext method is:
%
%      void DrawDestroyContext(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context to destroy
%
*/
MagickExport void DrawDestroyContext(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  /* Path operation support */
  context->path_operation = PathDefaultOperation;
  context->path_mode = DefaultPathMode;

  /* Pretty-printing depth */
  context->indent_depth = 0;

  /* Graphic context */
  for ( ; context->index != 0; context->index--)
    {
      DestroyDrawInfo(CurrentContext);
      CurrentContext = (DrawInfo*) NULL;
    }
  DestroyDrawInfo(CurrentContext);
  CurrentContext = (DrawInfo*) NULL;
  MagickFreeMemory(context->graphic_context);

  /* Pattern support */
  MagickFreeMemory(context->pattern_id);
  context->pattern_offset = 0;

  context->pattern_bounds.x = 0;
  context->pattern_bounds.y = 0;
  context->pattern_bounds.width = 0;
  context->pattern_bounds.height = 0;

  /* MVG output string and housekeeping */
  MagickFreeMemory(context->mvg);
  context->mvg_alloc = 0;
  context->mvg_length = 0;

  /* Support structures */
  context->image = (Image*)NULL;

  /* Context itself */
  context->signature = 0;
  MagickFreeMemory(context);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w E l l i p s e                                                     %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawEllipse() draws an ellipse on the image.
%
%  The format of the DrawEllipse method is:
%
%       void DrawEllipse(DrawContext context,
%                        const double ox, const double oy,
%                        const double rx, const double ry,
%                        const double start, const double end)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o ox: origin x ordinate
%
%    o oy: origin y ordinate
%
%    o rx: radius in x
%
%    o ry: radius in y
%
%    o start: starting rotation in degrees
%
%    o end: ending rotation in degrees
%
*/
MagickExport void DrawEllipse(DrawContext context,
                              const double ox, const double oy,
                              const double rx, const double ry,
                              const double start, const double end)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  (void) MvgPrintf(context, "ellipse %g,%g %g,%g %g,%g\n",
                   ox, oy, rx, ry, start, end);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t F i l l C o l o r                                           %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetFillColor() returns the fill color used for drawing filled objects.
%
%  The format of the DrawGetFillColor method is:
%
%      PixelPacket DrawGetFillColor(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
*/
MagickExport PixelPacket DrawGetFillColor(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return CurrentContext->fill;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t F i l l C o l o r                                           %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetFillColor() sets the fill color to be used for drawing filled objects.
%
%  The format of the DrawSetFillColor method is:
%
%      void DrawSetFillColor(DrawContext context,
%                            const PixelPacket * fill_color)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o fill_color: fill color
%
*/
MagickExport void DrawSetFillColor(DrawContext context,
                                   const PixelPacket *fill_color)
{
  PixelPacket
    *current_fill,
    new_fill;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);
  assert(fill_color != (const PixelPacket *) NULL);

  new_fill = *fill_color;

  /* Inherit base opacity */
  if(new_fill.opacity == OpaqueOpacity)
    new_fill.opacity = CurrentContext->opacity;

  current_fill = &CurrentContext->fill;
  if( context->filter_off || !(PixelPacketMatch(current_fill,&new_fill)) )
    {
      CurrentContext->fill = new_fill;

      (void) MvgPrintf(context, "fill '");
      MvgAppendColor(context, fill_color);
      (void) MvgPrintf(context, "'\n");
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t F i l l C o l o r S t r i n g                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetFillColorString() sets the fill color to be used for drawing filled
%  objects.
%
%  The format of the DrawSetFillColorString method is:
%
%      void DrawSetFillColorString(DrawContext context, const char* fill_color)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o fill_color: fill color
%
*/
MagickExport void DrawSetFillColorString(DrawContext context,
                                         const char* fill_color)
{
  PixelPacket
    pixel_packet;

  if(QueryColorDatabase(fill_color,&pixel_packet,&context->image->exception))
    DrawSetFillColor(context,&pixel_packet);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t F i l l P a t t e r n U R L                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetFillPatternURL() sets the URL to use as a fill pattern for filling
%  objects. Only local URLs ("#identifier") are supported at this time. These
%  local URLs are normally created by defining a named fill pattern with
%  DrawPushPattern/DrawPopPattern.
%
%  The format of the DrawSetFillPatternURL method is:
%
%      void DrawSetFillPatternURL(DrawContext context, const char* fill_url)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o fill_url: URL to use to obtain fill pattern.
%
*/
MagickExport void DrawSetFillPatternURL(DrawContext context, const char* fill_url)
{
  char
    pattern[MaxTextExtent];

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);
  assert(fill_url != NULL);

  if(fill_url[0] != '#')
    ThrowDrawException(DrawWarning,NotARelativeURL, fill_url);

  FormatString(pattern,"[%.1024s]",fill_url+1);

  if (GetImageAttribute(context->image,pattern) == (ImageAttribute *) NULL)
    {
      ThrowDrawException(DrawWarning,URLNotFound, fill_url)
    }
  else
    {
      char
        pattern_spec[MaxTextExtent];

      FormatString(pattern_spec,"url(%.1024s)",fill_url);
#if DRAW_BINARY_IMPLEMENTATION
      DrawPatternPath(context->image,CurrentContext,pattern_spec,&CurrentContext->fill_pattern);
#endif
      /* Inherit base opacity */
      if (CurrentContext->fill.opacity != TransparentOpacity)
        CurrentContext->fill.opacity=CurrentContext->opacity;

      (void) MvgPrintf(context, "fill %s\n",pattern_spec);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t F i l l O p a c i t y                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetFillOpacity() returns the opacity used when drawing using the fill
%  color or fill texture.  Fully opaque is 1.0.
%
%  The format of the DrawGetFillOpacity method is:
%
%      double DrawGetFillOpacity(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport double DrawGetFillOpacity(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return (((double)(MaxRGB-CurrentContext->fill.opacity))/MaxRGB);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t F i l l O p a c i t y                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetFillOpacity() sets the opacity to use when drawing using the fill
%  color or fill texture.  Fully opaque is 1.0.
%
%  The format of the DrawSetFillOpacity method is:
%
%      void DrawSetFillOpacity(DrawContext context, const double fill_opacity)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o fill_opacity: fill opacity
%
*/
MagickExport void DrawSetFillOpacity(DrawContext context,
                                     const double fill_opacity)
{
  Quantum
    quantum_opacity;

  double
    validated_opacity;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  validated_opacity=(fill_opacity < 0.0 ? 0.0 : (fill_opacity > 1.0 ? 1.0 : fill_opacity));
  quantum_opacity = (Quantum) (((double) MaxRGB*(1.0-validated_opacity))+0.5);

  if (context->filter_off || (CurrentContext->fill.opacity != quantum_opacity))
    {
      CurrentContext->fill.opacity = quantum_opacity;
      (void) (void) MvgPrintf(context, "fill-opacity %g\n", validated_opacity);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t F i l l R u l e                                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetFillRule() returns the fill rule used while drawing polygons.
%
%  The format of the DrawGetFillRule method is:
%
%      FillRule DrawGetFillRule(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
*/
MagickExport FillRule DrawGetFillRule(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return CurrentContext->fill_rule;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t F i l l R u l e                                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetFillRule() sets the fill rule to use while drawing polygons.
%
%  The format of the DrawSetFillRule method is:
%
%      void DrawSetFillRule(DrawContext context, const FillRule fill_rule)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o fill_rule: fill rule (EvenOddRule or NonZeroRule)
%
*/
MagickExport void DrawSetFillRule(DrawContext context,
                                  const FillRule fill_rule)
{
  const char
    *p = NULL;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if(context->filter_off || (CurrentContext->fill_rule != fill_rule))
    {
      CurrentContext->fill_rule = fill_rule;

      switch (fill_rule)
        {
        case EvenOddRule:
          p = "evenodd";
          break;
        case NonZeroRule:
          p = "nonzero";
          break;
        default:
          break;
        }

      if (p != NULL)
        (void) MvgPrintf(context, "fill-rule %s\n", p);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t F o n t                                                     %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetFont() returns a null-terminaged string specifying the font used
%  when annotating with text. The value returned must be freed by the user
%  when no longer needed.
%
%  The format of the DrawGetFont method is:
%
%      char *DrawGetFont(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
*/
MagickExport char *DrawGetFont(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if (CurrentContext->font != (char *) NULL)
    return AllocateString(CurrentContext->font);
  else
    return (char *) NULL;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t F o n t                                                     %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetFont() sets the fully-sepecified font to use when annotating with
%  text.
%
%  The format of the DrawSetFont method is:
%
%      void DrawSetFont(DrawContext context, const char *font_name)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o font_name: font name
%
*/
MagickExport void DrawSetFont(DrawContext context, const char *font_name)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);
  assert(font_name != (const char *) NULL);

  if(context->filter_off || (CurrentContext->font == NULL) ||
     LocaleCompare(CurrentContext->font,font_name) != 0)
    {
      (void) CloneString(&CurrentContext->font,font_name);
      if(CurrentContext->font == (char*)NULL)
        ThrowDrawException3(ResourceLimitError,MemoryAllocationFailed,
          UnableToDrawOnImage);
      (void) MvgPrintf(context, "font '%s'\n", font_name);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t F o n t F a m i l y                                         %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetFontFamily() returns the font family to use when annotating with text.
%  The value returned must be freed by the user when it is no longer needed.
%
%  The format of the DrawGetFontFamily method is:
%
%      char *DrawGetFontFamily(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
*/
MagickExport char *DrawGetFontFamily(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if (CurrentContext->family != NULL)
    return AllocateString(CurrentContext->family);
  else
    return (char *) NULL;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t F o n t F a m i l y                                         %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetFontFamily() sets the font family to use when annotating with text.
%
%  The format of the DrawSetFontFamily method is:
%
%      void DrawSetFontFamily(DrawContext context, const char *font_family)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o font_family: font family
%
*/
MagickExport void DrawSetFontFamily(DrawContext context,
                                    const char *font_family)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);
  assert(font_family != (const char *) NULL);

  if(context->filter_off || (CurrentContext->family == NULL) ||
     LocaleCompare(CurrentContext->family,font_family) != 0)
    {
      (void) CloneString(&CurrentContext->family,font_family);
      if(CurrentContext->family == (char*)NULL)
        ThrowDrawException3(ResourceLimitError,MemoryAllocationFailed,
          UnableToDrawOnImage);
      (void) MvgPrintf(context, "font-family '%s'\n", font_family);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t F o n t S i z e                                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetFontSize() returns the font pointsize used when annotating with text.
%
%  The format of the DrawGetFontSize method is:
%
%      double DrawGetFontSize(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
*/
MagickExport double DrawGetFontSize(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return CurrentContext->pointsize;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t F o n t S i z e                                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetFontSize() sets the font pointsize to use when annotating with text.
%
%  The format of the DrawSetFontSize method is:
%
%      void DrawSetFontSize(DrawContext context, const double pointsize)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o pointsize: text pointsize
%
*/
MagickExport void DrawSetFontSize(DrawContext context,
                                  const double pointsize)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if(context->filter_off ||
     (AbsoluteValue(CurrentContext->pointsize-pointsize) > MagickEpsilon))
    {
      CurrentContext->pointsize=pointsize;

      (void) MvgPrintf(context, "font-size %g\n", pointsize);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t F o n t S t r e t c h                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetFontStretch() returns the font stretch used when annotating with text.
%
%  The format of the DrawGetFontStretch method is:
%
%      StretchType DrawGetFontStretch(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
*/
MagickExport StretchType DrawGetFontStretch(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return CurrentContext->stretch;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t F o n t S t r e t c h                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetFontStretch() sets the font stretch to use when annotating with text.
%  The AnyStretch enumeration acts as a wild-card "don't care" option.
%
%  The format of the DrawSetFontStretch method is:
%
%      void DrawSetFontStretch(DrawContext context,
%                              const StretchType font_stretch)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o font_stretch: font stretch (NormalStretch, UltraCondensedStretch,
%                    CondensedStretch, SemiCondensedStretch,
%                    SemiExpandedStretch, ExpandedStretch,
%                    ExtraExpandedStretch, UltraExpandedStretch, AnyStretch)
%
*/
MagickExport void DrawSetFontStretch(DrawContext context,
                                     const StretchType font_stretch)
{
  const char
    *p = NULL;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if(context->filter_off || (CurrentContext->stretch != font_stretch))
    {
      CurrentContext->stretch=font_stretch;

      switch (font_stretch)
        {
        case NormalStretch:
          p = "normal";
          break;
        case UltraCondensedStretch:
          p = "ultra-condensed";
          break;
        case ExtraCondensedStretch:
          p = "extra-condensed";
          break;
        case CondensedStretch:
          p = "condensed";
          break;
        case SemiCondensedStretch:
          p = "semi-condensed";
          break;
        case SemiExpandedStretch:
          p = "semi-expanded";
          break;
        case ExpandedStretch:
          p = "expanded";
          break;
        case ExtraExpandedStretch:
          p = "extra-expanded";
          break;
        case UltraExpandedStretch:
          p = "ultra-expanded";
          break;
        case AnyStretch:
          p = "all";
          break;
        }

      if (p != NULL)
        (void) MvgPrintf(context, "font-stretch '%s'\n", p);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t F o n t S t y l e                                           %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetFontStyle() returns the font style used when annotating with text.
%
%  The format of the DrawGetFontStyle method is:
%
%      StyleType DrawGetFontStyle(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
*/
MagickExport StyleType DrawGetFontStyle(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return CurrentContext->style;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t F o n t S t y l e                                           %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetFontStyle() sets the font style to use when annotating with text.
%  The AnyStyle enumeration acts as a wild-card "don't care" option.
%
%  The format of the DrawSetFontStyle method is:
%
%      void DrawSetFontStyle(DrawContext context, const StyleType style)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o style: font style (NormalStyle, ItalicStyle, ObliqueStyle, AnyStyle)
%
*/
MagickExport void DrawSetFontStyle(DrawContext context,
                                   const StyleType style)
{
  const char
    *p = NULL;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if(context->filter_off || (CurrentContext->style != style))
    {
      CurrentContext->style=style;

      switch (style)
        {
        case NormalStyle:
          p = "normal";
          break;
        case ItalicStyle:
          p = "italic";
          break;
        case ObliqueStyle:
          p = "oblique";
          break;
        case AnyStyle:
          p = "all";
          break;
        }

      if (p != NULL)
        (void) MvgPrintf(context, "font-style '%s'\n", p);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t F o n t W e i g h t                                         %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetFontWeight() returns the font weight used when annotating with text.
%
%  The format of the DrawGetFontWeight method is:
%
%      unsigned long DrawGetFontWeight(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
*/
MagickExport unsigned long DrawGetFontWeight(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return CurrentContext->weight;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t F o n t W e i g h t                                         %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetFontWeight() sets the font weight to use when annotating with text.
%
%  The format of the DrawSetFontWeight method is:
%
%      void DrawSetFontWeight(DrawContext context,
%                             const unsigned long font_weight)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o font_weight: font weight (valid range 100-900)
%
*/
MagickExport void DrawSetFontWeight(DrawContext context,
                                    const unsigned long font_weight)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if(context->filter_off || (CurrentContext->weight != font_weight))
    {
      CurrentContext->weight=font_weight;
      (void) MvgPrintf(context, "font-weight %lu\n", font_weight);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t G r a v i t y                                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetGravity() returns the text placement gravity used when annotating
%  with text.
%
%  The format of the DrawGetGravity method is:
%
%      GravityType DrawGetGravity(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
*/
MagickExport GravityType DrawGetGravity(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return CurrentContext->gravity;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t G r a v i t y                                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetGravity() sets the text placement gravity to use when annotating
%  with text.
%
%  The format of the DrawSetGravity method is:
%
%      void DrawSetGravity(DrawContext context, const GravityType gravity)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o gravity: positioning gravity (NorthWestGravity, NorthGravity,
%               NorthEastGravity, WestGravity, CenterGravity,
%               EastGravity, SouthWestGravity, SouthGravity,
%               SouthEastGravity)
%
*/
MagickExport void DrawSetGravity(DrawContext context,
                                 const GravityType gravity)
{
  const char
    *p = NULL;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if(context->filter_off || (CurrentContext->gravity != gravity))
    {
      CurrentContext->gravity=gravity;

      switch (gravity)
        {
        case NorthWestGravity:
          p = "NorthWest";
          break;
        case NorthGravity:
          p = "North";
          break;
        case NorthEastGravity:
          p = "NorthEast";
          break;
        case WestGravity:
          p = "West";
          break;
        case CenterGravity:
          p = "Center";
          break;
        case EastGravity:
          p = "East";
          break;
        case SouthWestGravity:
          p = "SouthWest";
          break;
        case SouthGravity:
          p = "South";
          break;
        case SouthEastGravity:
          p = "SouthEast";
          break;
        case StaticGravity:
        case ForgetGravity:
          {
          }
          break;
        }

      if (p != NULL)
        (void) MvgPrintf(context, "gravity %s\n", p);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w C o m p o s i t e                                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawComposite() composites an image onto the current image, using the
%  specified composition operator, specified position, and at the specified
%  size.
%
%  The format of the DrawComposite method is:
%
%      void DrawComposite(DrawContext context,
%                         const CompositeOperator composite_operator,
%                         const double x, const double y,
%                         const double width, const double height,
%                         const Image * image )
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o composite_operator: composition operator
%
%    o x: x ordinate of top left corner
%
%    o y: y ordinate of top left corner
%
%    o width: Width to resize image to prior to compositing.  Specify zero to
%             use existing width.
%
%    o height: Height to resize image to prior to compositing.  Specify zero
%             to use existing height.
%
%    o image: Image to composite
%
*/
MagickExport void DrawComposite(DrawContext context,
                                const CompositeOperator composite_operator,
                                const double x, const double y,
                                const double width, const double height,
                                const Image * image )

{
  ImageInfo
    *image_info;

  Image
    *clone_image;

  char
    *media_type = NULL,
    *base64 = NULL;

  const char
    *mode = NULL;

  unsigned char
    *blob = (unsigned char*)NULL;

  size_t
    blob_length = 2048,
    encoded_length = 0;

  MonitorHandler
    handler;

  assert(context != (DrawContext)NULL);
  assert(image != (Image *) NULL);
  assert(width != 0);
  assert(height != 0);
  assert(*image->magick != '\0');

/*   LogMagickEvent(CoderEvent,GetMagickModule(),"DrawComposite columns=%ld rows=%ld magick=%s ", */
/*                  image->columns, image->rows, image->magick ); */

  clone_image = CloneImage(image,0,0,True,&context->image->exception);
  if(!clone_image)
    return;

  image_info = CloneImageInfo((ImageInfo*)NULL);
  if(!image_info)
    ThrowDrawException3(ResourceLimitError,MemoryAllocationFailed,
      UnableToDrawOnImage);
  handler=SetMonitorHandler((MonitorHandler) NULL);
  blob = (unsigned char*)ImageToBlob( image_info, clone_image, &blob_length,
                                      &context->image->exception );
  (void) SetMonitorHandler(handler);
  DestroyImageInfo(image_info);
  DestroyImageList(clone_image);
  if(!blob)
    return;

  base64 = Base64Encode(blob,blob_length,&encoded_length);
  MagickFreeMemory(blob);
  if(!base64)
    {
      char
        buffer[MaxTextExtent];

      FormatString(buffer,"%" MAGICK_SIZE_T_F "d bytes", (4L*blob_length/3L+4L));
      ThrowDrawException(ResourceLimitWarning,MemoryAllocationFailed,buffer)
    }

  mode = CompositeOperatorToString(composite_operator);
  media_type = MagickToMime( image->magick );

  if( media_type != NULL )
    {
      char
        *str;

      int
        remaining;

      (void) MvgPrintf(context, "image %s %g,%g %g,%g 'data:%s;base64,\n",
                mode, x, y, width, height, media_type);

      remaining = (int)encoded_length;
      str = base64;
      while( remaining > 0 )
        {
          (void) MvgPrintf(context,"%.76s", str);
          remaining -= 76;
          str += 76;
          if(remaining > 0)
            (void) MvgPrintf(context,"\n");
        }

      (void) MvgPrintf(context,"'\n");
    }

  MagickFreeMemory(base64);
  MagickFreeMemory(media_type);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w L i n e                                                           %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawLine() draws a line on the image using the current stroke color,
%  stroke opacity, and stroke width.
%
%  The format of the DrawLine method is:
%
%      void DrawLine(DrawContext context,
%                    const double sx, const double sy,
%                    const double ex, const double ey)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o sx: starting x ordinate
%
%    o sy: starting y ordinate
%
%    o ex: ending x ordinate
%
%    o ey: ending y ordinate
%
*/
MagickExport void DrawLine(DrawContext context,
                           const double sx, const double sy,
                           const double ex, const double ey)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  (void) MvgPrintf(context, "line %g,%g %g,%g\n", sx, sy, ex, ey);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w M a t t e                                                         %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawMatte() paints on the image's opacity channel in order to set effected
%  pixels to transparent.  The available paint methods are:
%
%    PointMethod: Select the target pixel
%    ReplaceMethod: Select any pixel that matches the target pixel.
%    FloodfillMethod: Select the target pixel and matching neighbors.
%    FillToBorderMethod: Select the target pixel and neighbors not matching
%                        border color.
%    ResetMethod: Select all pixels.
%
%  The format of the DrawMatte method is:
%
%      void DrawMatte(DrawContext context,
%                     const double x, const double y,
%                     const PaintMethod paint_method)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x: x ordinate
%
%    o y: y ordinate
%
%    o paint_method:
%
*/
MagickExport void DrawMatte(DrawContext context,
                            const double x, const double y,
                            const PaintMethod paint_method)
{
  const char
    *p = NULL;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  switch (paint_method)
    {
    case PointMethod:
      p = "point";
      break;
    case ReplaceMethod:
      p = "replace";
      break;
    case FloodfillMethod:
      p = "floodfill";
      break;
    case FillToBorderMethod:
      p = "filltoborder";
      break;
    case ResetMethod:
      p = "reset";
      break;
    }

  if (p != NULL)
    (void) MvgPrintf(context, "matte %g,%g %s\n", x, y, p);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h C l o s e                                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathClose() adds a path element to the current path which closes the
%  current subpath by drawing a straight line from the current point to the
%  current subpath's most recent starting point (usually, the most recent
%  moveto point).
%
%  The format of the DrawPathClose method is:
%
%      void DrawPathClose(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport void DrawPathClose(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  (void) MvgAutoWrapPrintf(context, "%s", context->path_mode == AbsolutePathMode ? "Z" : "z");
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h C u r v e T o A b s o l u t e                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathCurveToAbsolute() draws a cubic Bezier curve from the current
%  point to (x,y) using (x1,y1) as the control point at the beginning of
%  the curve and (x2,y2) as the control point at the end of the curve using
%  absolute coordinates. At the end of the command, the new current point
%  becomes the final (x,y) coordinate pair used in the polybezier.
%
%  The format of the DrawPathCurveToAbsolute method is:
%
%      void DrawPathCurveToAbsolute(DrawContext context,
%                                   const double x1, const double y1,
%                                   const double x2, const double y2,
%                                   const double x, const double y)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x1: x ordinate of control point for curve beginning
%
%    o y1: y ordinate of control point for curve beginning
%
%    o x2: x ordinate of control point for curve ending
%
%    o y2: y ordinate of control point for curve ending
%
%    o x: x ordinate of the end of the curve
%
%    o y: y ordinate of the end of the curve
%
*/
static void DrawPathCurveTo(DrawContext context,
                            const PathMode mode,
                            const double x1, const double y1,
                            const double x2, const double y2,
                            const double x, const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if ((context->path_operation != PathCurveToOperation)
      || (context->path_mode != mode))
    {
      context->path_operation = PathCurveToOperation;
      context->path_mode = mode;
      (void) MvgAutoWrapPrintf(context, "%c%g,%g %g,%g %g,%g",
                        mode == AbsolutePathMode ? 'C' : 'c',
                        x1, y1, x2, y2, x, y);
    }
  else
    (void) MvgAutoWrapPrintf(context, " %g,%g %g,%g %g,%g",
                      x1, y1, x2, y2, x, y);
}
MagickExport void DrawPathCurveToAbsolute(DrawContext context,
                                          const double x1, const double y1,
                                          const double x2, const double y2,
                                          const double x, const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  DrawPathCurveTo(context, AbsolutePathMode, x1, y1, x2, y2, x, y);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h C u r v e T o R e l a t i v e                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathCurveToRelative() draws a cubic Bezier curve from the current
%  point to (x,y) using (x1,y1) as the control point at the beginning of
%  the curve and (x2,y2) as the control point at the end of the curve using
%  relative coordinates. At the end of the command, the new current point
%  becomes the final (x,y) coordinate pair used in the polybezier.
%
%  The format of the DrawPathCurveToRelative method is:
%
%      void DrawPathCurveToRelative(DrawContext context,
%                                   const double x1, const double y1,
%                                   const double x2, const double y2,
%                                   const double x, const double y)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x1: x ordinate of control point for curve beginning
%
%    o y1: y ordinate of control point for curve beginning
%
%    o x2: x ordinate of control point for curve ending
%
%    o y2: y ordinate of control point for curve ending
%
%    o x: x ordinate of the end of the curve
%
%    o y: y ordinate of the end of the curve
%
*/
MagickExport void DrawPathCurveToRelative(DrawContext context,
                                          const double x1, const double y1,
                                          const double x2, const double y2,
                                          const double x, const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  DrawPathCurveTo(context, RelativePathMode, x1, y1, x2, y2, x, y);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h C u r v e T o Q u a d r a t i c B e z i e r A b s o l u t e %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathCurveToQuadraticBezierAbsolute() draws a quadratic Bezier curve
%  from the current point to (x,y) using (x1,y1) as the control point using
%  absolute coordinates. At the end of the command, the new current point
%  becomes the final (x,y) coordinate pair used in the polybezier.
%
%  The format of the DrawPathCurveToQuadraticBezierAbsolute method is:
%
%      void DrawPathCurveToQuadraticBezierAbsolute(DrawContext context,
%                                                  const double x1,
%                                                  const double y1,
%                                                  const double x,
%                                                  const double y)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x1: x ordinate of the control point
%
%    o y1: y ordinate of the control point
%
%    o x: x ordinate of final point
%
%    o y: y ordinate of final point
%
*/
static void DrawPathCurveToQuadraticBezier(DrawContext context,
                                           const PathMode mode,
                                           const double x1, double y1,
                                           const double x, const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if ((context->path_operation != PathCurveToQuadraticBezierOperation)
      || (context->path_mode != mode))
    {
      context->path_operation = PathCurveToQuadraticBezierOperation;
      context->path_mode = mode;
      (void) MvgAutoWrapPrintf(context, "%c%g,%g %g,%g",
                        mode == AbsolutePathMode ? 'Q' : 'q', x1, y1, x, y);
    }
  else
    (void) MvgAutoWrapPrintf(context, " %g,%g %g,%g", x1, y1, x, y);
}
MagickExport void DrawPathCurveToQuadraticBezierAbsolute(DrawContext context,
                                                         const double x1,
                                                         const double y1,
                                                         const double x,
                                                         const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  DrawPathCurveToQuadraticBezier(context, AbsolutePathMode, x1, y1, x, y);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h C u r v e T o Q u a d r a t i c B e z i e r R e l a t i v e %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathCurveToQuadraticBezierRelative() draws a quadratic Bezier curve
%  from the current point to (x,y) using (x1,y1) as the control point using
%  relative coordinates. At the end of the command, the new current point
%  becomes the final (x,y) coordinate pair used in the polybezier.
%
%  The format of the DrawPathCurveToQuadraticBezierRelative method is:
%
%      void DrawPathCurveToQuadraticBezierRelative(DrawContext context,
%                                                  const double x1,
%                                                  const double y1,
%                                                  const double x,
%                                                  const double y)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x1: x ordinate of the control point
%
%    o y1: y ordinate of the control point
%
%    o x: x ordinate of final point
%
%    o y: y ordinate of final point
%
*/
MagickExport void DrawPathCurveToQuadraticBezierRelative(DrawContext context,
                                                         const double x1,
                                                         const double y1,
                                                         const double x,
                                                         const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  DrawPathCurveToQuadraticBezier(context, RelativePathMode, x1, y1, x, y);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h C u r v e T o Q u a d r a t i c B e z i e r S m o o t h A b s o l u t e %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathCurveToQuadraticBezierSmoothAbsolute() draws a quadratic
%  Bezier curve (using absolute coordinates) from the current point to
%  (x,y). The control point is assumed to be the reflection of the
%  control point on the previous command relative to the current
%  point. (If there is no previous command or if the previous command was
%  not a DrawPathCurveToQuadraticBezierAbsolute,
%  DrawPathCurveToQuadraticBezierRelative,
%  DrawPathCurveToQuadraticBezierSmoothAbsolut or
%  DrawPathCurveToQuadraticBezierSmoothRelative, assume the control point
%  is coincident with the current point.). At the end of the command, the
%  new current point becomes the final (x,y) coordinate pair used in the
%  polybezier.
%
%  The format of the DrawPathCurveToQuadraticBezierSmoothAbsolute method is:
%
%      void DrawPathCurveToQuadraticBezierSmoothAbsolute(DrawContext
%                                                        context,
%                                                        const double x,
%                                                        const double y)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x: x ordinate of final point
%
%    o y: y ordinate of final point
%
*/
static void DrawPathCurveToQuadraticBezierSmooth(DrawContext context,
                                                 const PathMode mode,
                                                 const double x, const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if ((context->path_operation != PathCurveToQuadraticBezierSmoothOperation)
      || (context->path_mode != mode))
    {
      context->path_operation = PathCurveToQuadraticBezierSmoothOperation;
      context->path_mode = mode;
      (void) MvgAutoWrapPrintf(context, "%c%g,%g",
                        mode == AbsolutePathMode ? 'T' : 't', x, y);
    }
  else
    (void) MvgAutoWrapPrintf(context, " %g,%g", x, y);
}
MagickExport void DrawPathCurveToQuadraticBezierSmoothAbsolute(DrawContext
                                                               context,
                                                               const double x,
                                                               const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  DrawPathCurveToQuadraticBezierSmooth(context, AbsolutePathMode, x, y);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h C u r v e T o Q u a d r a t i c B e z i e r S m o o t h R e l a t i v e %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathCurveToQuadraticBezierSmoothAbsolute() draws a quadratic
%  Bezier curve (using relative coordinates) from the current point to
%  (x,y). The control point is assumed to be the reflection of the
%  control point on the previous command relative to the current
%  point. (If there is no previous command or if the previous command was
%  not a DrawPathCurveToQuadraticBezierAbsolute,
%  DrawPathCurveToQuadraticBezierRelative,
%  DrawPathCurveToQuadraticBezierSmoothAbsolut or
%  DrawPathCurveToQuadraticBezierSmoothRelative, assume the control point
%  is coincident with the current point.). At the end of the command, the
%  new current point becomes the final (x,y) coordinate pair used in the
%  polybezier.
%
%  The format of the DrawPathCurveToQuadraticBezierSmoothRelative method is:
%
%      void DrawPathCurveToQuadraticBezierSmoothRelative(DrawContext
%                                                        context,
%                                                        const double x,
%                                                        const double y)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x: x ordinate of final point
%
%    o y: y ordinate of final point
%
%
*/
MagickExport void DrawPathCurveToQuadraticBezierSmoothRelative(DrawContext
                                                               context,
                                                               const double x,
                                                               const double y)
{
  DrawPathCurveToQuadraticBezierSmooth(context, RelativePathMode, x, y);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h C u r v e T o S m o o t h A b s o l u t e                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathCurveToSmoothAbsolute() draws a cubic Bezier curve from the
%  current point to (x,y) using absolute coordinates. The first control
%  point is assumed to be the reflection of the second control point on
%  the previous command relative to the current point. (If there is no
%  previous command or if the previous command was not an
%  DrawPathCurveToAbsolute, DrawPathCurveToRelative,
%  DrawPathCurveToSmoothAbsolute or DrawPathCurveToSmoothRelative, assume
%  the first control point is coincident with the current point.) (x2,y2)
%  is the second control point (i.e., the control point at the end of the
%  curve). At the end of the command, the new current point becomes the
%  final (x,y) coordinate pair used in the polybezier.
%
%  The format of the DrawPathCurveToSmoothAbsolute method is:
%
%      void DrawPathCurveToSmoothAbsolute(DrawContext context,
%                                         const double x2, const double y2,
%                                         const double x, const double y)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x2: x ordinate of second control point
%
%    o y2: y ordinate of second control point
%
%    o x: x ordinate of termination point
%
%    o y: y ordinate of termination point
%
%
*/
static void DrawPathCurveToSmooth(DrawContext context, const PathMode mode,
                                  const double x2, const double y2,
                                  const double x, const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if ((context->path_operation != PathCurveToSmoothOperation)
      || (context->path_mode != mode))
    {
      context->path_operation = PathCurveToSmoothOperation;
      context->path_mode = mode;
      (void) MvgAutoWrapPrintf(context, "%c%g,%g %g,%g",
                        mode == AbsolutePathMode ? 'S' : 's', x2, y2, x, y);
    }
  else
    (void) MvgAutoWrapPrintf(context, " %g,%g %g,%g", x2, y2, x, y);
}
MagickExport void DrawPathCurveToSmoothAbsolute(DrawContext context,
                                                const double x2, const double y2,
                                                const double x, const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  DrawPathCurveToSmooth(context, AbsolutePathMode, x2, y2, x, y);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h C u r v e T o S m o o t h R e l a t i v e                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathCurveToSmoothRelative() draws a cubic Bezier curve from the
%  current point to (x,y) using relative coordinates. The first control
%  point is assumed to be the reflection of the second control point on
%  the previous command relative to the current point. (If there is no
%  previous command or if the previous command was not an
%  DrawPathCurveToAbsolute, DrawPathCurveToRelative,
%  DrawPathCurveToSmoothAbsolute or DrawPathCurveToSmoothRelative, assume
%  the first control point is coincident with the current point.) (x2,y2)
%  is the second control point (i.e., the control point at the end of the
%  curve). At the end of the command, the new current point becomes the
%  final (x,y) coordinate pair used in the polybezier.
%
%  The format of the DrawPathCurveToSmoothRelative method is:
%
%      void DrawPathCurveToSmoothRelative(DrawContext context,
%                                         const double x2, const double y2,
%                                         const double x, const double y)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x2: x ordinate of second control point
%
%    o y2: y ordinate of second control point
%
%    o x: x ordinate of termination point
%
%    o y: y ordinate of termination point
%
%
*/
MagickExport void DrawPathCurveToSmoothRelative(DrawContext context,
                                                const double x2, const double y2,
                                                const double x, const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  DrawPathCurveToSmooth(context, RelativePathMode, x2, y2, x, y);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h E l l i p t i c A r c A b s o l u t e                     %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathEllipticArcAbsolute() draws an elliptical arc from the current
%  point to (x, y) using absolute coordinates. The size and orientation
%  of the ellipse are defined by two radii (rx, ry) and an
%  xAxisRotation, which indicates how the ellipse as a whole is rotated
%  relative to the current coordinate system. The center (cx, cy) of the
%  ellipse is calculated automatically to satisfy the constraints imposed
%  by the other parameters. largeArcFlag and sweepFlag contribute to the
%  automatic calculations and help determine how the arc is drawn. If
%  largeArcFlag is true then draw the larger of the available arcs. If
%  sweepFlag is true, then draw the arc matching a clock-wise rotation.
%
%  The format of the DrawPathEllipticArcAbsolute method is:
%
%      void DrawPathEllipticArcAbsolute(DrawContext context,
%                                       const double rx, const double ry,
%                                       const double x_axis_rotation,
%                                       unsigned int large_arc_flag,
%                                       unsigned int sweep_flag,
%                                       const double x, const double y)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o rx: x radius
%
%    o ry: y radius
%
%    o x_axis_rotation: indicates how the ellipse as a whole is rotated
%                       relative to the current coordinate system
%
%    o large_arc_flag: If non-zero (true) then draw the larger of the
%                      available arcs
%
%    o sweep_flag: If non-zero (true) then draw the arc matching a
%                  clock-wise rotation
%
%
*/
static void DrawPathEllipticArc(DrawContext context, const PathMode mode,
                                const double rx, const double ry,
                                const double x_axis_rotation,
                                unsigned int large_arc_flag,
                                unsigned int sweep_flag,
                                const double x, const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if ((context->path_operation != PathEllipticArcOperation)
      || (context->path_mode != mode))
    {
      context->path_operation = PathEllipticArcOperation;
      context->path_mode = mode;
      (void) MvgAutoWrapPrintf(context, "%c%g,%g %g %u %u %g,%g",
                        mode == AbsolutePathMode ? 'A' : 'a', rx, ry, x_axis_rotation,
                        large_arc_flag, sweep_flag, x, y);
    }
  else
    (void) MvgAutoWrapPrintf(context, " %g,%g %g %u %u %g,%g", rx, ry,
                      x_axis_rotation, large_arc_flag, sweep_flag, x, y);
}
MagickExport void DrawPathEllipticArcAbsolute(DrawContext context,
                                              const double rx, const double ry,
                                              const double x_axis_rotation,
                                              unsigned int large_arc_flag,
                                              unsigned int sweep_flag,
                                              const double x, const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  DrawPathEllipticArc(context, AbsolutePathMode, rx, ry, x_axis_rotation,
                      large_arc_flag, sweep_flag, x, y);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h E l l i p t i c A r c R e l a t i v e                     %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathEllipticArcRelative() draws an elliptical arc from the current
%  point to (x, y) using relative coordinates. The size and orientation
%  of the ellipse are defined by two radii (rx, ry) and an
%  xAxisRotation, which indicates how the ellipse as a whole is rotated
%  relative to the current coordinate system. The center (cx, cy) of the
%  ellipse is calculated automatically to satisfy the constraints imposed
%  by the other parameters. largeArcFlag and sweepFlag contribute to the
%  automatic calculations and help determine how the arc is drawn. If
%  largeArcFlag is true then draw the larger of the available arcs. If
%  sweepFlag is true, then draw the arc matching a clock-wise rotation.
%
%  The format of the DrawPathEllipticArcRelative method is:
%
%      void DrawPathEllipticArcRelative(DrawContext context,
%                                       const double rx, const double ry,
%                                       const double x_axis_rotation,
%                                       unsigned int large_arc_flag,
%                                       unsigned int sweep_flag,
%                                       const double x, const double y)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o rx: x radius
%
%    o ry: y radius
%
%    o x_axis_rotation: indicates how the ellipse as a whole is rotated
%                       relative to the current coordinate system
%
%    o large_arc_flag: If non-zero (true) then draw the larger of the
%                      available arcs
%
%    o sweep_flag: If non-zero (true) then draw the arc matching a
%                  clock-wise rotation
%
*/
MagickExport void DrawPathEllipticArcRelative(DrawContext context,
                                              const double rx, const double ry,
                                              const double x_axis_rotation,
                                              unsigned int large_arc_flag,
                                              unsigned int sweep_flag,
                                              const double x, const double y)
{
  DrawPathEllipticArc(context, RelativePathMode, rx, ry, x_axis_rotation,
                      large_arc_flag, sweep_flag, x, y);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h F i n i s h                                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathFinish() terminates the current path.
%
%  The format of the DrawPathFinish method is:
%
%      void DrawPathFinish(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport void DrawPathFinish(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  (void) MvgPrintf(context, "'\n");
  context->path_operation = PathDefaultOperation;
  context->path_mode = DefaultPathMode;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h L i n e T o A b s o l u t e                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathLineToAbsolute() draws a line path from the current point to the
%  given coordinate using absolute coordinates. The coordinate then becomes
%  the new current point.
%
%  The format of the DrawPathLineToAbsolute method is:
%
%      void DrawPathLineToAbsolute(DrawContext context,
%                                  const double x, const double y)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x: target x ordinate
%
%    o y: target y ordinate
%
*/
static void DrawPathLineTo(DrawContext context,
                           const PathMode mode,
                           const double x, const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if ((context->path_operation != PathLineToOperation)
      || (context->path_mode != mode))
    {
      context->path_operation = PathLineToOperation;
      context->path_mode = mode;
      (void) MvgAutoWrapPrintf(context, "%c%g,%g",
                        mode == AbsolutePathMode ? 'L' : 'l', x, y);
    }
  else
    (void) MvgAutoWrapPrintf(context, " %g,%g", x, y);
}
MagickExport void DrawPathLineToAbsolute(DrawContext context,
                                         const double x, const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  DrawPathLineTo(context, AbsolutePathMode, x, y);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h L i n e T o R e l a t i v e                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathLineToRelative() draws a line path from the current point to the
%  given coordinate using relative coordinates. The coordinate then becomes
%  the new current point.
%
%  The format of the DrawPathLineToRelative method is:
%
%      void DrawPathLineToRelative(DrawContext context,
%                                  const double x, const double y)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x: target x ordinate
%
%    o y: target y ordinate
%
*/
MagickExport void DrawPathLineToRelative(DrawContext context,
                                         const double x, const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  DrawPathLineTo(context, RelativePathMode, x, y);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h L i n e T o H o r i z o n t a l A b s o l u t e           %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathLineToHorizontalAbsolute() draws a horizontal line path from the
%  current point to the target point using absolute coordinates.  The target
%  point then becomes the new current point.
%
%  The format of the DrawPathLineToHorizontalAbsolute method is:
%
%      void DrawPathLineToHorizontalAbsolute(DrawContext context,
%                                            const double x)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x: target x ordinate
%
*/

static void DrawPathLineToHorizontal(DrawContext context,
                                     const PathMode mode, const double x)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if ((context->path_operation != PathLineToHorizontalOperation)
      || (context->path_mode != mode))
    {
      context->path_operation = PathLineToHorizontalOperation;
      context->path_mode = mode;
      (void) MvgAutoWrapPrintf(context, "%c%g",
                        mode == AbsolutePathMode ? 'H' : 'h', x);
    }
  else
    (void) MvgAutoWrapPrintf(context, " %g", x);
}
MagickExport void DrawPathLineToHorizontalAbsolute(DrawContext context,
                                                   const double x)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  DrawPathLineToHorizontal(context, AbsolutePathMode, x);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h L i n e T o H o r i z o n t a l R e l a t i v e           %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathLineToHorizontalRelative() draws a horizontal line path from the
%  current point to the target point using relative coordinates.  The target
%  point then becomes the new current point.
%
%  The format of the DrawPathLineToHorizontalRelative method is:
%
%      void DrawPathLineToHorizontalRelative(DrawContext context, const double x)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x: target x ordinate
%
*/
MagickExport void DrawPathLineToHorizontalRelative(DrawContext context,
                                                   const double x)
{
  DrawPathLineToHorizontal(context, RelativePathMode, x);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h L i n e T o V e r t i c a l A b s o l u t e               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathLineToVerticalAbsolute() draws a vertical line path from the
%  current point to the target point using absolute coordinates.  The target
%  point then becomes the new current point.
%
%  The format of the DrawPathLineToVerticalAbsolute method is:
%
%      void DrawPathLineToVerticalAbsolute(DrawContext context,
%                                          const double y)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o y: target y ordinate
%
*/
static void DrawPathLineToVertical(DrawContext context, const PathMode mode,
                                   const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if ((context->path_operation != PathLineToVerticalOperation)
      || (context->path_mode != mode))
    {
      context->path_operation = PathLineToVerticalOperation;
      context->path_mode = mode;
      (void) MvgAutoWrapPrintf(context, "%c%g",
                        mode == AbsolutePathMode ? 'V' : 'v', y);
    }
  else
    (void) MvgAutoWrapPrintf(context, " %g", y);
}
MagickExport void DrawPathLineToVerticalAbsolute(DrawContext context,
                                                 const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  DrawPathLineToVertical(context, AbsolutePathMode, y);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h L i n e T o V e r t i c a l R e l a t i v e               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathLineToVerticalRelative() draws a vertical line path from the
%  current point to the target point using relative coordinates.  The target
%  point then becomes the new current point.
%
%  The format of the DrawPathLineToVerticalRelative method is:
%
%      void DrawPathLineToVerticalRelative(DrawContext context,
%                                          const double y)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o y: target y ordinate
%
*/
MagickExport void DrawPathLineToVerticalRelative(DrawContext context,
                                                 const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  DrawPathLineToVertical(context, RelativePathMode, y);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h M o v e T o A b s o l u t e                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathMoveToAbsolute() starts a new sub-path at the given coordinate
%  using absolute coordinates. The current point then becomes the
%  specified coordinate.
%
%  The format of the DrawPathMoveToAbsolute method is:
%
%      void DrawPathMoveToAbsolute(DrawContext context, const double x,
%                                  const double y)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x: target x ordinate
%
%    o y: target y ordinate
%
*/
 static void DrawPathMoveTo(DrawContext context, const PathMode mode,
                           const double x, const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if ((context->path_operation != PathMoveToOperation)
      || (context->path_mode != mode))
    {
      context->path_operation = PathMoveToOperation;
      context->path_mode = mode;
      (void) MvgAutoWrapPrintf(context, "%c%g,%g",
                        mode == AbsolutePathMode ? 'M' : 'm', x, y);
    }
  else
    (void) MvgAutoWrapPrintf(context, " %g,%g", x, y);
}

MagickExport void DrawPathMoveToAbsolute(DrawContext context, const double x,
                                         const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  DrawPathMoveTo(context, AbsolutePathMode, x, y);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h M o v e T o R e l a t i v e                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathMoveToRelative() starts a new sub-path at the given coordinate
%  using relative coordinates. The current point then becomes the
%  specified coordinate.
%
%  The format of the DrawPathMoveToRelative method is:
%
%      void DrawPathMoveToRelative(DrawContext context,
%                                  const double x, const double y)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x: target x ordinate
%
%    o y: target y ordinate
%
*/
MagickExport void DrawPathMoveToRelative(DrawContext context,
                                         const double x, const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  DrawPathMoveTo(context, RelativePathMode, x, y);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P a t h S t a r t                                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPathStart() declares the start of a path drawing list which is terminated
%  by a matching DrawPathFinish() command. All other DrawPath commands must
%  be enclosed between a DrawPathStart() and a DrawPathFinish() command. This
%  is because path drawing commands are subordinate commands and they do not
%  function by themselves.
%
%  The format of the DrawPathStart method is:
%
%      void DrawPathStart(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport void DrawPathStart(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  (void) MvgPrintf(context, "path '");
  context->path_operation = PathDefaultOperation;
  context->path_mode = DefaultPathMode;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P e e k G r a p h i c C o n t e x t                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPeekGraphicContext() returns a copy of the the DrawInfo structure at
%  the head of the drawing context stack. The user is responsible for
%  deallocating the returned object using DestroyDrawInfo.
%
%  The format of the DrawPeekGraphicContext method is:
%
%      DrawInfo *DrawPeekGraphicContext(const DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport DrawInfo *DrawPeekGraphicContext(const DrawContext context)
{
  DrawInfo
    *draw_info;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);
  draw_info=CloneDrawInfo((ImageInfo *) NULL,CurrentContext);
  (void) CloneString(&draw_info->primitive,context->mvg);
  CurrentContext->primitive=context->mvg;
  return(draw_info);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P o i n t                                                         %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPoint() draws a point using the current stroke color and stroke
%  thickness at the specified coordinates.
%
%  The format of the DrawPoint method is:
%
%      void DrawPoint(DrawContext context, const double x, const double y)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x: target x coordinate
%
%    o y: target y coordinate
%
*/
MagickExport void DrawPoint(DrawContext context,
                            const double x, const double y)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  (void) MvgPrintf(context, "point %g,%g\n", x, y);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P o l y g o n                                                     %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPolygon() draws a polygon using the current stroke, stroke width, and
%  fill color or texture, using the specified array of coordinates.
%
%  The format of the DrawPolygon method is:
%
%      void DrawPolygon(DrawContext context,
%                       const unsigned long num_coords,
%                       const PointInfo * coordinates)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o num_coords: number of coordinates
%
%    o coordinates: coordinate array
%
*/
MagickExport void DrawPolygon(DrawContext context,
                              const unsigned long num_coords,
                              const PointInfo * coordinates)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  MvgAppendPointsCommand(context,"polygon",num_coords,coordinates);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P o l y l i n e                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPolyline() draws a polyline using the current stroke, stroke width, and
%  fill color or texture, using the specified array of coordinates.
%
%  The format of the DrawPolyline method is:
%
%      void DrawPolyline(DrawContext context,
%                        const unsigned long num_coords,
%                        const PointInfo * coordinates)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o num_coords: number of coordinates
%
%    o coordinates: coordinate array
%
*/
MagickExport void DrawPolyline(DrawContext context,
                               const unsigned long num_coords,
                               const PointInfo * coordinates)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  MvgAppendPointsCommand(context,"polyline",num_coords,coordinates);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P o p C l i p P a t h                                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPopClipPath() terminates a clip path definition.
%
%  The format of the DrawPopClipPath method is:
%
%      void DrawPopClipPath(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport void DrawPopClipPath(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if(context->indent_depth != 0)
    context->indent_depth--;
  (void) MvgPrintf(context, "pop clip-path\n");
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P o p D e f s                                                     %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPopDefs() terminates a definition list
%
%  The format of the DrawPopDefs method is:
%
%      void DrawPopDefs(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport void DrawPopDefs(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if(context->indent_depth != 0)
    context->indent_depth--;
  (void) MvgPrintf(context, "pop defs\n");
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P o p G r a p h i c C o n t e x t                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPopGraphicContext() destroys the current context returning to the
%  previously pushed context. Multiple contexts may exist. It is an error
%  to attempt to pop more contexts than have been pushed, and it is proper
%  form to pop all contexts which have been pushed.
%
%  The format of the DrawPopGraphicContext method is:
%
%      void DrawPopGraphicContext(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport void DrawPopGraphicContext(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if(context->index != 0)
    {
      /* Destroy clip path if not same in preceding context */
#if DRAW_BINARY_IMPLEMENTATION
      char * pClipPathCurrent = *DrawInfoGetClipPath(CurrentContext);
      char * pClipPathPrevious = *DrawInfoGetClipPath(context->graphic_context[context->index-1]);
      if (pClipPathCurrent != (char *) NULL)
        if (LocaleCompare(pClipPathCurrent,pClipPathPrevious) != 0)
          (void) SetImageClipMask(context->image,(Image *) NULL);
#endif

      DestroyDrawInfo(CurrentContext);
      CurrentContext=(DrawInfo*)NULL;
      context->index--;

      if(context->indent_depth != 0)
        context->indent_depth--;
      (void) MvgPrintf(context, "pop graphic-context\n");
    }
  else
    {
      ThrowDrawException(DrawError,UnbalancedGraphicContextPushPop,NULL)
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P o p P a t t e r n                                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPopPattern() terminates a pattern definition.
%
%  The format of the DrawPopPattern method is:
%
%      void DrawPopPattern(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport void DrawPopPattern(DrawContext context)
{
  char
    geometry[MaxTextExtent],
    key[MaxTextExtent];

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if( context->pattern_id == NULL )
    ThrowDrawException(DrawWarning,NotCurrentlyPushingPatternDefinition,NULL);

  FormatString(key,"[%.1024s]",context->pattern_id);

  (void) SetImageAttribute(context->image,key,context->mvg+context->pattern_offset);
  FormatString(geometry,"%lux%lu%+ld%+ld",
               context->pattern_bounds.width,context->pattern_bounds.height,
               context->pattern_bounds.x,context->pattern_bounds.y);
  (void) SetImageAttribute(context->image,key,geometry);

  MagickFreeMemory(context->pattern_id);
  context->pattern_offset = 0;

  context->pattern_bounds.x = 0;
  context->pattern_bounds.y = 0;
  context->pattern_bounds.width = 0;
  context->pattern_bounds.height = 0;

  context->filter_off = False;

  if(context->indent_depth != 0)
    context->indent_depth--;
  (void) MvgPrintf(context, "pop pattern\n");
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P u s h C l i p P a t h                                           %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPushClipPath() starts a clip path definition which is comprized of
%  any number of drawing commands and terminated by a DrawPopClipPath()
%  command.
%
%  The format of the DrawPushClipPath method is:
%
%      void DrawPushClipPath(DrawContext context, const char *clip_path_id)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o clip_path_id: string identifier to associate with the clip path for
%      later use.
%
*/
MagickExport void DrawPushClipPath(DrawContext context,
                                   const char *clip_path_id)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);
  assert(clip_path_id != (const char *) NULL);

  (void) MvgPrintf(context, "push clip-path %s\n", clip_path_id);
  context->indent_depth++;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P u s h D e f s                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPushDefs() indicates that commands up to a terminating DrawPopDefs()
%  command create named elements (e.g. clip-paths, textures, etc.) which
%  may safely be processed earlier for the sake of efficiency.
%
%  The format of the DrawPushDefs method is:
%
%      void DrawPushDefs(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport void DrawPushDefs(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  (void) MvgPrintf(context, "push defs\n");
  context->indent_depth++;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P u s h G r a p h i c C o n t e x t                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPushGraphicContext() clones the current drawing context to create a
%  new drawing context. The original drawing context(s) may be returned to
%  by invoking DrawPopGraphicContext().  The contexts are stored on a context
%  stack.  For every Pop there must have already been an equivalent Push.
%
%  The format of the DrawPushGraphicContext method is:
%
%      void DrawPushGraphicContext(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport void DrawPushGraphicContext(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  context->index++;
  MagickReallocMemory(DrawInfo **,context->graphic_context,
                  MagickArraySize((size_t) context->index+1,sizeof(DrawInfo *)));
  if (context->graphic_context == (DrawInfo **) NULL)
    {
      context->index--;
      ThrowDrawException3(ResourceLimitError,MemoryAllocationFailed,
        UnableToDrawOnImage)
    }
  CurrentContext=
    CloneDrawInfo((ImageInfo *) NULL,context->graphic_context[context->index-1]);
  (void) MvgPrintf(context, "push graphic-context\n");
  context->indent_depth++;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w P u s h P a t t e r n                                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawPushPattern() indicates that subsequent commands up to a
%  DrawPopPattern() command comprise the definition of a named pattern.
%  The pattern space is assigned top left corner coordinates, a width
%  and height, and becomes its own drawing space.  Anything which can
%  be drawn may be used in a pattern definition.
%  Named patterns may be used as stroke or brush definitions.
%
%  The format of the DrawPushPattern method is:
%
%      void DrawPushPattern(DrawContext context,
%                           const char *pattern_id,
%                           const double x, const double y,
%                           const double width, const double height)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o pattern_id: pattern identification for later reference
%
%    o x: x ordinate of top left corner
%
%    o y: y ordinate of top left corner
%
%    o width: width of pattern space
%
%    o height: height of pattern space
%
*/
MagickExport void DrawPushPattern(DrawContext context,
                                  const char *pattern_id,
                                  const double x, const double y,
                                  const double width, const double height)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);
  assert(pattern_id != (const char *) NULL);

  if( context->pattern_id != NULL )
    ThrowDrawException(DrawError,AlreadyPushingPatternDefinition,
      context->pattern_id);

  context->filter_off = True;

  (void) MvgPrintf(context, "push pattern %s %g,%g %g,%g\n",
            pattern_id, x, y, width, height);
  context->indent_depth++;

  /* Record current pattern ID, bounds, and start position in MVG */
  context->pattern_id = AllocateString(pattern_id);
  context->pattern_bounds.x = (long) ceil(x-0.5);
  context->pattern_bounds.y = (long) ceil(y-0.5);
  context->pattern_bounds.width = (unsigned long) floor(width+0.5);
  context->pattern_bounds.height = (unsigned long) floor(height+0.5);
  context->pattern_offset = context->mvg_length;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w R e c t a n g l e                                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawRectangle() draws a rectangle given two coordinates and using
%  the current stroke, stroke width, and fill settings.
%
%  The format of the DrawRectangle method is:
%
%      void DrawRectangle(DrawContext context,
%                         const double x1, const double y1,
%                         const double x2, const double y2)
%
%  A description of each parameter follows:
%
%    o x1: x ordinate of first coordinate
%
%    o y1: y ordinate of first coordinate
%
%    o x2: x ordinate of second coordinate
%
%    o y2: y ordinate of second coordinate
%
*/
MagickExport void DrawRectangle(DrawContext context,
                                const double x1, const double y1,
                                const double x2, const double y2)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);
  (void) MvgPrintf(context, "rectangle %g,%g %g,%g\n", x1, y1, x2, y2);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w R e n d e r                                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawRender() renders all preceding drawing commands onto the image.
%
%  The format of the DrawRender method is:
%
%      int DrawRender(const DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport int DrawRender(const DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  CurrentContext->primitive = context->mvg;
  (void) LogMagickEvent(RenderEvent,GetMagickModule(),"MVG:\n'%s'\n",context->mvg);
  (void) DrawImage(context->image, CurrentContext);
  CurrentContext->primitive = (char *) NULL;

  return True;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w R o t a t e                                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawRotate() applies the specified rotation to the current coordinate
%  space.
%
%  The format of the DrawRotate method is:
%
%      void DrawRotate(DrawContext context, const double degrees)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o degrees: degrees of rotation
%
*/
MagickExport void DrawRotate(DrawContext context, const double degrees)
{
  AffineMatrix
    affine;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  IdentityAffine(&affine);
  affine.sx=cos(DegreesToRadians(fmod(degrees,360.0)));
  affine.rx=sin(DegreesToRadians(fmod(degrees,360.0)));
  affine.ry=(-sin(DegreesToRadians(fmod(degrees,360.0))));
  affine.sy=cos(DegreesToRadians(fmod(degrees,360.0)));
  AdjustAffine( context, &affine );

  (void) MvgPrintf(context, "rotate %g\n", degrees);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w R o u n d R e c t a n g l e                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawRoundRectangle() draws a rounted rectangle given two coordinates,
%  x & y corner radiuses and using the current stroke, stroke width,
%  and fill settings.
%
%  The format of the DrawRoundRectangle method is:
%
%      void DrawRoundRectangle(DrawContext context,
%                              double x1, double y1,
%                              double x2, double y2,
%                              double rx, double ry)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x1: x ordinate of first coordinate
%
%    o y1: y ordinate of first coordinate
%
%    o x2: x ordinate of second coordinate
%
%    o y2: y ordinate of second coordinate
%
%    o rx: radius of corner in horizontal direction
%
%    o ry: radius of corner in vertical direction
%
*/
MagickExport void DrawRoundRectangle(DrawContext context,
                                     double x1, double y1,
                                     double x2, double y2,
                                     double rx, double ry)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  (void) MvgPrintf(context, "roundrectangle %g,%g %g,%g %g,%g\n",
            x1, y1, x2, y2, rx, ry);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S c a l e                                                         %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawScale() adjusts the scaling factor to apply in the horizontal and
%  vertical directions to the current coordinate space.
%
%  The format of the DrawScale method is:
%
%      void DrawScale(DrawContext context, const double x, const double y)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x: horizontal scale factor
%
%    o y: vertical scale factor
%
*/
MagickExport void DrawScale(DrawContext context,
                               const double x, const double y)
{
  AffineMatrix
    affine;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  IdentityAffine(&affine);
  affine.sx=x;
  affine.sy=y;
  AdjustAffine( context, &affine );

  (void) MvgPrintf(context, "scale %g,%g\n", x, y);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S k e w X                                                         %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSkewX() skews the current coordinate system in the horizontal
%  direction.
%
%  The format of the DrawSkewX method is:
%
%      void DrawSkewX(DrawContext context, const double degrees)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o degrees: number of degrees to skew the coordinates
%
*/
MagickExport void DrawSkewX(DrawContext context, const double degrees)
{
  AffineMatrix
    affine;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  IdentityAffine(&affine);
  affine.ry=tan(DegreesToRadians(fmod(degrees,360.0)));
  AdjustAffine(context,&affine);

  (void) MvgPrintf(context, "skewX %g\n", degrees);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S k e w Y                                                         %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSkewY() skews the current coordinate system in the vertical
%  direction.
%
%  The format of the DrawSkewY method is:
%
%      void DrawSkewY(DrawContext context, const double degrees)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o degrees: number of degrees to skew the coordinates
%
*/
MagickExport void DrawSkewY(DrawContext context, const double degrees)
{
  AffineMatrix
    affine;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  IdentityAffine(&affine);
  affine.rx=tan(DegreesToRadians(fmod(degrees,360.0)));
  DrawAffine(context,&affine);

  (void) MvgPrintf(context, "skewY %g\n", degrees);
}

#if 0

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t S t o p C o l o r                                           %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetStopColor() sets the stop color and offset for gradients
%
%  The format of the DrawSetStopColor method is:
%
%      void DrawSetStopColor(DrawContext context,
%                            const PixelPacket * stop_color,
%                            const double offset)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o stop_color:
%
%    o offset:
%
*/
/* This is gradient stuff so it shouldn't be supported yet */
MagickExport void DrawSetStopColor(DrawContext context,
                                   const PixelPacket * stop_color,
                                   const double offset)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);
  assert(stop_color != (const PixelPacket *) NULL);


  (void) MvgPrintf(context, "stop-color ");
  MvgAppendColor(context, stop_color);
  (void) MvgPrintf(context, "\n");
}
#endif

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t S t r o k e C o l o r                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetStrokeColor() returns the color used for stroking object outlines.
%
%  The format of the DrawGetStrokeColor method is:
%
%      PixelPacket DrawGetStrokeColor(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport PixelPacket DrawGetStrokeColor(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return CurrentContext->stroke;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t S t r o k e C o l o r                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetStrokeColor() sets the color used for stroking object outlines.
%
%  The format of the DrawSetStrokeColor method is:
%
%      void DrawSetStrokeColor(DrawContext context,
%                              const PixelPacket * stroke_color)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o stroke_color: stroke color
%
*/
MagickExport void DrawSetStrokeColor(DrawContext context,
                                     const PixelPacket * stroke_color)
{
  PixelPacket
    *current_stroke,
    new_stroke;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);
  assert(stroke_color != (const PixelPacket *) NULL);

  new_stroke = *stroke_color;

  /* Inherit base opacity */
  if(new_stroke.opacity == OpaqueOpacity)
    new_stroke.opacity = CurrentContext->opacity;

  current_stroke = &CurrentContext->stroke;
  if( context->filter_off || !(PixelPacketMatch(current_stroke,&new_stroke)) )
    {
      CurrentContext->stroke = new_stroke;

      (void) MvgPrintf(context, "stroke '");
      MvgAppendColor(context, stroke_color);
      (void) MvgPrintf(context, "'\n");
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t S t r o k e C o l o r S t r i n g                           %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetStrokeColorString() sets the color used for stroking object outlines.
%
%  The format of the DrawSetStrokeColorString method is:
%
%      void DrawSetStrokeColorString(DrawContext context,
%                                    const char* stroke_color)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o stroke_color: stroke color
%
*/
MagickExport void DrawSetStrokeColorString(DrawContext context,
                                           const char* stroke_color)
{
  PixelPacket
    pixel_packet;

  if(QueryColorDatabase(stroke_color,&pixel_packet,&context->image->exception))
    DrawSetStrokeColor(context,&pixel_packet);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t S t r o k e P a t t e r n U R L                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetStrokePatternURL() sets the pattern used for stroking object outlines.
%
%  The format of the DrawSetStrokePatternURL method is:
%
%      void DrawSetStrokePatternURL(DrawContext context, const char* stroke_url)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o stroke_url: URL specifying pattern ID (e.g. "#pattern_id")
%
*/
MagickExport void DrawSetStrokePatternURL(DrawContext context,
                                          const char* stroke_url)
{
  char
    pattern[MaxTextExtent];

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);
  assert(stroke_url != NULL);

  if(stroke_url[0] != '#')
    ThrowDrawException(DrawWarning, NotARelativeURL, stroke_url);

  FormatString(pattern,"[%.1024s]",stroke_url+1);

  if (GetImageAttribute(context->image,pattern) == (ImageAttribute *) NULL)
    {
      ThrowDrawException(DrawWarning, URLNotFound, stroke_url)
    }
  else
    {
      char
        pattern_spec[MaxTextExtent];

      FormatString(pattern_spec,"url(%.1024s)",stroke_url);
#if DRAW_BINARY_IMPLEMENTATION
      DrawPatternPath(context->image,CurrentContext,pattern_spec,&CurrentContext->stroke_pattern);
#endif
      /* Inherit base opacity */
      if (CurrentContext->stroke.opacity == OpaqueOpacity)
        CurrentContext->stroke.opacity=CurrentContext->opacity;

      (void) MvgPrintf(context, "stroke %s\n",pattern_spec);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t S t r o k e A n t i a l i a s                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetStrokeAntialias() returns the current stroke antialias setting.
%  Stroked outlines are antialiased by default.  When antialiasing is disabled
%  stroked pixels are thresholded to determine if the stroke color or
%  underlying canvas color should be used.
%
%  The format of the DrawGetStrokeAntialias method is:
%
%      unsigned int DrawGetStrokeAntialias(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
*/
MagickExport unsigned int DrawGetStrokeAntialias(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return CurrentContext->stroke_antialias;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t S t r o k e A n t i a l i a s                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetStrokeAntialias() controls whether stroked outlines are antialiased.
%  Stroked outlines are antialiased by default.  When antialiasing is disabled
%  stroked pixels are thresholded to determine if the stroke color or
%  underlying canvas color should be used.
%
%  The format of the DrawSetStrokeAntialias method is:
%
%      void DrawSetStrokeAntialias(DrawContext context,
%                                  const unsigned int stroke_antialias)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o stroke_antialias: set to false (zero) to disable antialiasing
%
*/
MagickExport void DrawSetStrokeAntialias(DrawContext context,
                                         const unsigned int stroke_antialias)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if(context->filter_off || (CurrentContext->stroke_antialias != stroke_antialias))
    {
      CurrentContext->stroke_antialias = stroke_antialias;

      (void) MvgPrintf(context, "stroke-antialias %i\n", stroke_antialias ? 1 : 0);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t S t r o k e D a s h A r r a y                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetStrokeDashArray() returns an array representing the pattern of
%  dashes and gaps used to stroke paths (see DrawSetStrokeDashArray). The
%  array must be freed once it is no longer required by the user.
%
%  The format of the DrawGetStrokeDashArray method is:
%
%      double *DrawGetStrokeDashArray(DrawContext context,unsigned long *num_elems)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o num_elems: address to place number of elements in dash array
%
% */
MagickExport double *DrawGetStrokeDashArray(DrawContext context,
                                            unsigned long *num_elems)
{
  register const double
    *p;

  register double
    *q;

  double
    *dasharray;

  unsigned int
    i,
    n = 0;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);
  assert(num_elems != (unsigned long *)NULL);

  p = CurrentContext->dash_pattern;
  if( p != (const double *) NULL )
    while( *p++ != 0.0)
      n++;

  *num_elems = n;
  dasharray = (double *)NULL;
  if (n != 0)
    {
      dasharray = MagickAllocateArray(double *, (size_t) n+1, sizeof(double));
      if (dasharray != (double*)NULL)
        {
          p = CurrentContext->dash_pattern;
          q = dasharray;
          i = n;
          while( i-- )
            *q++ = *p++;
          *q=0.0;
        }
    }
  return dasharray;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t S t r o k e D a s h A r r a y                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetStrokeDashArray() specifies the pattern of dashes and gaps used to
%  stroke paths. The strokeDashArray represents an array of numbers that
%  specify the lengths of alternating dashes and gaps in pixels. If an odd
%  number of values is provided, then the list of values is repeated to yield
%  an even number of values. To remove an existing dash array, pass a zero
%  num_elems argument and null dasharray. A typical stroke dash array might
%  contain the members 5 3 2.
%
%  The format of the DrawSetStrokeDashArray method is:
%
%      void DrawSetStrokeDashArray(DrawContext context,
%                                  const unsigned long num_elems,
%                                  const double *dasharray)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o num_elems: number of elements in dash array
%
%    o dasharray: dash array values
%
% */
MagickExport void DrawSetStrokeDashArray(DrawContext context,
                                         const unsigned long num_elems,
                                         const double *dasharray)
{
  register const double
    *p;

  register double
    *q;

  unsigned long
    i,
    n_new = num_elems,
    n_old = 0;

  MagickBool
    updated = MagickFalse;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if (dasharray == (const double *) NULL)
    n_new = 0;
  q = CurrentContext->dash_pattern;
  if( q != (const double *) NULL )
    while( *q++ != 0.0)
      n_old++;

  if( (n_old == 0) && (n_new == 0) )
    {
      updated = MagickFalse;
    }
  else if( n_old != n_new )
    {
      updated = MagickTrue;
    }
  else if((CurrentContext->dash_pattern != (double*)NULL)
          && (dasharray != (double*)NULL))
    {
      p = dasharray;
      q = CurrentContext->dash_pattern;
      i = n_new;
      while( i-- )
        {
          if(AbsoluteValue(*p - *q) > MagickEpsilon)
            {
              updated = MagickTrue;
              break;
            }
          ++p;
          ++q;
        }
    }

  if( context->filter_off || updated )
    {
      if(CurrentContext->dash_pattern != (double*)NULL)
        MagickFreeMemory(CurrentContext->dash_pattern);

      if( n_new != 0 )
        {
          CurrentContext->dash_pattern = MagickAllocateArray(double *,
                                                             ((size_t) n_new+1),
                                                             sizeof(double));
          if(CurrentContext->dash_pattern)
            {
              for (i=0; i < n_new; i++)
                CurrentContext->dash_pattern[i]=dasharray[i];
              CurrentContext->dash_pattern[n_new]=0.0;
            }
          else
            {
              ThrowDrawException3(ResourceLimitError,MemoryAllocationFailed,
                UnableToDrawOnImage)
            }
        }

      (void) MvgPrintf(context, "stroke-dasharray ");
      if ( n_new == 0 )
        (void) MvgPrintf(context, "none");
      else
        {
          for (i=0; i < n_new; i++)
            {
              if (i != 0)
                (void) MvgPrintf(context, ",");
              (void) MvgPrintf(context, "%g", dasharray[i]);
            }
        }
      (void) MvgPrintf(context, "\n");
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t S t r o k e D a s h O f f s e t                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetStrokeDashOffset() returns the offset into the dash pattern to
%  start the dash.
%
%  The format of the DrawGetStrokeDashOffset method is:
%
%      double DrawGetStrokeDashOffset(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport double DrawGetStrokeDashOffset(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return CurrentContext->dash_offset;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t S t r o k e D a s h O f f s e t                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetStrokeDashOffset() specifies the offset into the dash pattern to
%  start the dash.
%
%  The format of the DrawSetStrokeDashOffset method is:
%
%      void DrawSetStrokeDashOffset(DrawContext context,
%                                   const double dash_offset)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o dash_offset: dash offset
%
*/
MagickExport void DrawSetStrokeDashOffset(DrawContext context,
                                          const double dash_offset)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if(context->filter_off ||
     (AbsoluteValue(CurrentContext->dash_offset-dash_offset) > MagickEpsilon))
    {
      CurrentContext->dash_offset = dash_offset;

      (void) MvgPrintf(context, "stroke-dashoffset %g\n", dash_offset);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t S t r o k e L i n e C a p                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetStrokeLineCap() returns the shape to be used at the end of
%  open subpaths when they are stroked. Values of LineCap are
%  UndefinedCap, ButtCap, RoundCap, and SquareCap.
%
%  The format of the DrawGetStrokeLineCap method is:
%
%      LineCap DrawGetStrokeLineCap(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
% */
MagickExport LineCap DrawGetStrokeLineCap(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return CurrentContext->linecap;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t S t r o k e L i n e C a p                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetStrokeLineCap() specifies the shape to be used at the end of
%  open subpaths when they are stroked. Values of LineCap are
%  UndefinedCap, ButtCap, RoundCap, and SquareCap.
%
%  The format of the DrawSetStrokeLineCap method is:
%
%      void DrawSetStrokeLineCap(DrawContext context,
%                                const LineCap linecap)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o linecap: linecap style
%
% */
MagickExport void DrawSetStrokeLineCap(DrawContext context,
                                       const LineCap linecap)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if(context->filter_off || (CurrentContext->linecap != linecap))
    {
      const char
        *p = NULL;

      CurrentContext->linecap = linecap;

      switch (linecap)
        {
        case ButtCap:
          p = "butt";
          break;
        case RoundCap:
          p = "round";
          break;
        case SquareCap:
          p = "square";
          break;
        default:
          break;
        }

      if (p != NULL)
        (void) MvgPrintf(context, "stroke-linecap %s\n", p);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t S t r o k e L i n e J o i n                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetStrokeLineJoin() returns the shape to be used at the
%  corners of paths (or other vector shapes) when they are
%  stroked. Values of LineJoin are UndefinedJoin, MiterJoin, RoundJoin,
%  and BevelJoin.
%
%  The format of the DrawGetStrokeLineJoin method is:
%
%      LineJoin DrawGetStrokeLineJoin(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
% */
MagickExport LineJoin DrawGetStrokeLineJoin(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return CurrentContext->linejoin;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t S t r o k e L i n e J o i n                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetStrokeLineJoin() specifies the shape to be used at the
%  corners of paths (or other vector shapes) when they are
%  stroked. Values of LineJoin are UndefinedJoin, MiterJoin, RoundJoin,
%  and BevelJoin.
%
%  The format of the DrawSetStrokeLineJoin method is:
%
%      void DrawSetStrokeLineJoin(DrawContext context, const LineJoin linejoin)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o linejoin: line join style
%
% */
MagickExport void DrawSetStrokeLineJoin(DrawContext context,
                                        const LineJoin linejoin)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if(context->filter_off || (CurrentContext->linejoin != linejoin))
    {
      const char
        *p = NULL;

      CurrentContext->linejoin = linejoin;

      switch (linejoin)
        {
        case MiterJoin:
          p = "miter";
          break;
        case RoundJoin:
          p = "round";
          break;
        case BevelJoin:
          p = "bevel";
          break;
        default:
          break;
        }

      if (p != NULL)
        (void) MvgPrintf(context, "stroke-linejoin %s\n", p);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t S t r o k e M i t e r L i m i t                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetStrokeMiterLimit() returns the miter limit. When two line
%  segments meet at a sharp angle and miter joins have been specified for
%  'lineJoin', it is possible for the miter to extend far beyond the
%  thickness of the line stroking the path. The miterLimit' imposes a
%  limit on the ratio of the miter length to the 'lineWidth'.
%
%  The format of the DrawGetStrokeMiterLimit method is:
%
%      unsigned long DrawGetStrokeMiterLimit(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
% */
MagickExport unsigned long DrawGetStrokeMiterLimit(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return CurrentContext->miterlimit;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t S t r o k e M i t e r L i m i t                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetStrokeMiterLimit() specifies the miter limit. When two line
%  segments meet at a sharp angle and miter joins have been specified for
%  'lineJoin', it is possible for the miter to extend far beyond the
%  thickness of the line stroking the path. The miterLimit' imposes a
%  limit on the ratio of the miter length to the 'lineWidth'.
%
%  The format of the DrawSetStrokeMiterLimit method is:
%
%      void DrawSetStrokeMiterLimit(DrawContext context,
%                                   const unsigned long miterlimit)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o miterlimit: miter limit
%
% */
MagickExport void DrawSetStrokeMiterLimit(DrawContext context,
                                          const unsigned long miterlimit)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if(CurrentContext->miterlimit != miterlimit)
    {
      CurrentContext->miterlimit = miterlimit;

      (void) MvgPrintf(context, "stroke-miterlimit %lu\n", miterlimit);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t S t r o k e O p a c i t y                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetStrokeOpacity() returns the opacity of stroked object outlines.
%
%  The format of the DrawGetStrokeOpacity method is:
%
%      double DrawGetStrokeOpacity(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
*/
MagickExport double DrawGetStrokeOpacity(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return (((double)(MaxRGB-CurrentContext->stroke.opacity))/MaxRGB);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t S t r o k e O p a c i t y                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetStrokeOpacity() specifies the opacity of stroked object outlines.
%
%  The format of the DrawSetStrokeOpacity method is:
%
%      void DrawSetStrokeOpacity(DrawContext context,
%                                const double stroke_opacity)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o stroke_opacity: stroke opacity.  The value 1.0 is opaque.
%
*/
MagickExport void DrawSetStrokeOpacity(DrawContext context,
                                       const double stroke_opacity)
{
  Quantum
    quantum_opacity;

  double
    validated_opacity;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  validated_opacity=(stroke_opacity < 0.0 ? 0.0 : (stroke_opacity > 1.0 ? 1.0 : stroke_opacity));
  quantum_opacity = (Quantum) (((double) MaxRGB*(1.0-validated_opacity))+0.5);

  if (context->filter_off || (CurrentContext->stroke.opacity != quantum_opacity))
    {
      CurrentContext->stroke.opacity = quantum_opacity;
      (void) MvgPrintf(context, "stroke-opacity %g\n", validated_opacity);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t S t r o k e W i d t h                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetStrokeWidth() returns the width of the stroke used to draw object
%  outlines.
%
%  The format of the DrawGetStrokeWidth method is:
%
%      double DrawGetStrokeWidth(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport double DrawGetStrokeWidth(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return CurrentContext->stroke_width;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t S t r o k e W i d t h                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetStrokeWidth() sets the width of the stroke used to draw object
%  outlines.
%
%  The format of the DrawSetStrokeWidth method is:
%
%      void DrawSetStrokeWidth(DrawContext context, const double stroke_width)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o stroke_width: stroke width
%
*/
MagickExport void DrawSetStrokeWidth(DrawContext context,
                                     const double stroke_width)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if (context->filter_off ||
      (AbsoluteValue(CurrentContext->stroke_width-stroke_width) > MagickEpsilon))
    {
      CurrentContext->stroke_width = stroke_width;

      (void) MvgPrintf(context, "stroke-width %g\n", stroke_width);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t T e x t A n t i a l i a s                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetTextAntialias() returns the current text antialias setting, which
%  determines whether text is antialiased.  Text is antialiased by default.
%
%  The format of the DrawGetTextAntialias method is:
%
%      unsigned int DrawGetTextAntialias(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport unsigned int DrawGetTextAntialias(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return CurrentContext->text_antialias;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t T e x t A n t i a l i a s                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetTextAntialias() controls whether text is antialiased.  Text is
%  antialiased by default.
%
%  The format of the DrawSetTextAntialias method is:
%
%      void DrawSetTextAntialias(DrawContext context,
%                                const unsigned int text_antialias)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o text_antialias: antialias boolean. Set to false (0) to disable
%                      antialiasing.
%
*/
MagickExport void DrawSetTextAntialias(DrawContext context,
                                       const unsigned int text_antialias)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if (context->filter_off || (CurrentContext->text_antialias != text_antialias))
    {
      CurrentContext->text_antialias = text_antialias;

      (void) MvgPrintf(context, "text-antialias %i\n", text_antialias ? 1 : 0);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t T e x t D e c o r a t i o n                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetTextDecoration() returns the decoration applied when annotating with
%  text.
%
%  The format of the DrawGetTextDecoration method is:
%
%      DecorationType DrawGetTextDecoration(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport DecorationType DrawGetTextDecoration(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return CurrentContext->decorate;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t T e x t D e c o r a t i o n                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetTextDecoration() specifies a decoration to be applied when
%  annotating with text.
%
%  The format of the DrawSetTextDecoration method is:
%
%      void DrawSetTextDecoration(DrawContext context,
%                                 const DecorationType decoration)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o decoration: text decoration.  One of NoDecoration, UnderlineDecoration,
%                                    OverlineDecoration, or LineThroughDecoration
%
*/
MagickExport void DrawSetTextDecoration(DrawContext context,
                                        const DecorationType decoration)
{
  const char
    *p = NULL;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if (context->filter_off || (CurrentContext->decorate != decoration))
    {
      CurrentContext->decorate = decoration;

      switch (decoration)
        {
        case NoDecoration:
          p = "none";
          break;
        case UnderlineDecoration:
          p = "underline";
          break;
        case OverlineDecoration:
          p = "overline";
          break;
        case LineThroughDecoration:
          p = "line-through";
          break;
        }

      if (p != NULL)
        (void) MvgPrintf(context, "decorate %s\n", p);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t T e x t E n c o d i n g                                     %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetTextEncoding() returns a null-terminated string which specifies the
%  code set used for text annotations. The string must be freed by the user
%  once it is no longer required.
%
%  The format of the DrawGetTextEncoding method is:
%
%      char *DrawGetTextEncoding(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
% */
MagickExport char *DrawGetTextEncoding(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  if (CurrentContext->encoding != (char *)NULL)
    return (char *) AllocateString(CurrentContext->encoding);
  else
    return (char *) NULL;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t T e x t E n c o d i n g                                     %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetTextEncoding() specifies specifies the code set to use for
%  text annotations. The only character encoding which may be specified
%  at this time is "UTF-8" for representing Unicode as a sequence of
%  bytes. Specify an empty string to set text encoding to the system's
%  default. Successful text annotation using Unicode may require fonts
%  designed to support Unicode.
%
%  The format of the DrawSetTextEncoding method is:
%
%      void DrawSetTextEncoding(DrawContext context, const char* encoding)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o encoding: character string specifying text encoding
%
*/
MagickExport void DrawSetTextEncoding(DrawContext context, const char* encoding)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);
  assert(encoding != (char *) NULL);

  if (context->filter_off || (CurrentContext->encoding == (char *) NULL) ||
      (LocaleCompare(CurrentContext->encoding,encoding) != 0))
    {
        (void) CloneString(&CurrentContext->encoding,encoding);

      (void) MvgPrintf(context, "encoding '%s'\n", encoding);
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w G e t T e x t U n d e r C o l o r                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawGetTextUnderColor() returns the color of a background rectangle
%  to place under text annotations.
%
%  The format of the DrawGetTextUnderColor method is:
%
%      PixelPacket DrawGetTextUnderColor(DrawContext context)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
*/
MagickExport PixelPacket DrawGetTextUnderColor(DrawContext context)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  return CurrentContext->undercolor;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t T e x t U n d e r C o l o r                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetTextUnderColor() specifies the color of a background rectangle
%  to place under text annotations.
%
%  The format of the DrawSetTextUnderColor method is:
%
%      void DrawSetTextUnderColor(DrawContext context,
%                                 const PixelPacket *under_color)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o under_color: text under color
%
*/
MagickExport void DrawSetTextUnderColor(DrawContext context,
                                        const PixelPacket *under_color)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);
  assert(under_color != (const PixelPacket *)NULL);

  if (context->filter_off || !(PixelPacketMatch(&CurrentContext->undercolor, under_color)))
    {
      CurrentContext->undercolor = *under_color;
      (void) MvgPrintf(context, "text-undercolor '");
      MvgAppendColor(context, under_color);
      (void) MvgPrintf(context, "'\n");
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t T e x t U n d e r C o l o r S t r i n g                     %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetTextUnderColorString() specifies the color of a background rectangle
%  to place under text annotations.
%
%  The format of the DrawSetTextUnderColorString method is:
%
%      void DrawSetTextUnderColorString(DrawContext context,
%                                       const char* under_color)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o under_color: text under color
%
*/
MagickExport void DrawSetTextUnderColorString(DrawContext context,
                                              const char* under_color)
{
  PixelPacket
    pixel_packet;

  if(QueryColorDatabase(under_color,&pixel_packet,&context->image->exception))
    DrawSetTextUnderColor(context,&pixel_packet);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w T r a n s l a t e                                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawTranslate() applies a translation to the current coordinate
%  system which moves the coordinate system origin to the specified
%  coordinate.
%
%  The format of the DrawTranslate method is:
%
%      void DrawTranslate(DrawContext context,
%                            const double x, const double y)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x: new x ordinate for coordinate system origin
%
%    o y: new y ordinate for coordinate system origin
%
*/
MagickExport void DrawTranslate(DrawContext context,
                                   const double x, const double y)
{
  AffineMatrix
    affine;

  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  IdentityAffine(&affine);
  affine.tx=x;
  affine.ty=y;
  AdjustAffine( context, &affine );

  (void) MvgPrintf(context, "translate %g,%g\n", x, y);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D r a w S e t V i e w b o x                                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DrawSetViewbox() sets the overall canvas size to be recorded with the
%  drawing vector data.  Usually this will be specified using the same
%  size as the canvas image.  When the vector data is saved to SVG or MVG
%  formats, the viewbox is use to specify the size of the canvas image that
%  a viewer will render the vector data on.
%
%  The format of the DrawSetViewbox method is:
%
%      void DrawSetViewbox(DrawContext context,
%                          unsigned long x1, unsigned long y1,
%                          unsigned long x2, unsigned long y2)
%
%  A description of each parameter follows:
%
%    o context: drawing context
%
%    o x1: left x ordinate
%
%    o y1: top y ordinate
%
%    o x2: right x ordinate
%
%    o y2: bottom y ordinate
%
*/
MagickExport void DrawSetViewbox(DrawContext context,
                                 unsigned long x1, unsigned long y1,
                                 unsigned long x2, unsigned long y2)
{
  assert(context != (DrawContext)NULL);
  assert(context->signature == MagickSignature);

  (void) MvgPrintf(context, "viewbox %lu %lu %lu %lu\n", x1, y1, x2, y2);
}
