composite - Merge image pixels using a specified algorithm
unsigned int CompositeImage( Image *canvas_image, const CompositeOperator compose, const Image *composite_image, const long x_offset, const long y_offset );
CompositeImage() returns the second image ( composite_image ) composited onto the first ( canvas_image ) at the specified offsets.
The format of the CompositeImage method is:
unsigned int CompositeImage ( Image *canvas_image, const CompositeOperator compose, const Image *composite_image, const long x_offset, const long y_offset );
A description of each parameter follows:
- canvas_image:
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The image to be updated.
- compose:
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This operator affects how the composite is applied to the image. The default is Over. Choose from one of these operators: OverCompositeOp, InCompositeOp, OutCompositeOP, AtopCompositeOP, XorCompositeOP, PlusCompositeOP, MinusCompositeOP, AddCompositeOP, SubtractCompositeOP, DifferenceCompositeOP, BumpmapCompositeOP, CopyCompositeOP, CopyRedCompositeOP, CopyGreenCompositeOP, CopyBlueCompositeOP, CopyOpacityCompositeOP.
- composite_image:
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The composite image.
- x_offset:
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The column offset of the composited image.
- y_offset:
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The row offset of the composited image.