draw - Methods to Draw on an Image
DrawInfo * CloneDrawInfo( const ImageInfo *image_info, const DrawInfo *draw_info );
unsigned int ColorFloodfillImage( Image *image, const DrawInfo *draw_info, const PixelPacket target, const long x_offset, const long y_offset, const PaintMethod method );
void DestroyDrawInfo( DrawInfo *draw_info );
unsigned int DrawClipPath( Image *image, const DrawInfo *draw_info, const char *name );
unsigned int DrawImage( Image *image, DrawInfo *draw_info );
unsigned int DrawPatternPath( Image *image, DrawInfo *draw_info, const char *name, Image ** pattern );
unsigned int MatteFloodfillImage( Image *image, const PixelPacket target, const unsigned int opacity, const long x_offset, const long y_offset, const PaintMethod method );
unsigned int OpaqueImage( Image *image, const PixelPacket target, const PixelPacket fill );
unsigned int TransparentImage( Image *image, const PixelPacket target, const unsigned int opacity );
CloneDrawInfo() makes a copy of the given draw info structure. If NULL is specified, a new image info structure is created initialized to default values.
The format of the CloneDrawInfo method is:
DrawInfo *CloneDrawInfo ( const ImageInfo *image_info, const DrawInfo *draw_info );
A description of each parameter follows:
ColorFloodfill() changes the color value of any pixel that matches target and is an immediate neighbor. If the method FillToBorderMethod is specified, the color value is changed for any neighbor pixel that does not match the bordercolor member of image.
By default target must match a particular pixel color exactly. However, in many cases two colors may differ by a small amount. The fuzz member of image defines how much tolerance is acceptable to consider two colors as the same. For example, set fuzz to 10 and the color red at intensities of 100 and 102 respectively are now interpreted as the same color for the purposes of the floodfill.
The format of the ColorFloodfillImage method is:
unsigned int ColorFloodfillImage ( Image *image, const DrawInfo *draw_info, const PixelPacket target, const long x_offset, const long y_offset, const PaintMethod method );
A description of each parameter follows:
DestroyDrawInfo() deallocates memory associated with an DrawInfo structure.
The format of the DestroyDrawInfo method is:
void DestroyDrawInfo ( DrawInfo *draw_info );
A description of each parameter follows:
DrawClipPath() draws the clip path on the image mask.
The format of the DrawClipPath method is:
unsigned int DrawClipPath ( Image *image, const DrawInfo *draw_info, const char *name );
A description of each parameter follows:
Use DrawImage() to draw a graphic primitive on your image. The primitive may be represented as a string or filename. Precede the filename with an "at" sign ( @ ) and the contents of the file are drawn on the image. You can affect how text is drawn by setting one or more members of the draw info structure.
The format of the DrawImage method is:
unsigned int DrawImage ( Image *image, DrawInfo *draw_info );
A description of each parameter follows:
DrawPatternPath() draws a pattern.
The format of the DrawPatternPath method is:
unsigned int DrawPatternPath ( Image *image, DrawInfo *draw_info, const char *name, Image **pattern );
A description of each parameter follows:
MatteFloodfill() changes the transparency value of any pixel that matches target and is an immediate neighbor. If the method FillToBorderMethod is specified, the transparency value is changed for any neighbor pixel that does not match the bordercolor member of image.
By default target must match a particular pixel transparency exactly. However, in many cases two transparency values may differ by a small amount. The fuzz member of image defines how much tolerance is acceptable to consider two transparency values as the same. For example, set fuzz to 10 and the opacity values of 100 and 102 respectively are now interpreted as the same value for the purposes of the floodfill.
The format of the MatteFloodfillImage method is:
unsigned int MatteFloodfillImage ( Image *image, const PixelPacket target, const unsigned int opacity, const long x_offset, const long y_offset, const PaintMethod method );
A description of each parameter follows:
OpaqueImage() changes any pixel that matches color with the color defined by fill.
By default color must match a particular pixel color exactly. However, in many cases two colors may differ by a small amount. Fuzz defines how much tolerance is acceptable to consider two colors as the same. For example, set fuzz to 10 and the color red at intensities of 100 and 102 respectively are now interpreted as the same color.
The format of the OpaqueImage method is:
unsigned int OpaqueImage ( Image *image, const PixelPacket target, const PixelPacket fill );
A description of each parameter follows:
TransparentImage() changes the opacity value associated with any pixel that matches color to the value defined by opacity.
By default color must match a particular pixel color exactly. However, in many cases two colors may differ by a small amount. Fuzz defines how much tolerance is acceptable to consider two colors as the same. For example, set fuzz to 10 and the color red at intensities of 100 and 102 respectively are now interpreted as the same color.
The format of the TransparentImage method is:
unsigned int TransparentImage ( Image *image, const PixelPacket target, const unsigned int opacity );
A description of each parameter follows: