// Composite modifies the image, drawing the draw Image argument at offset
// (x, y) using the c Composite operation.
func (im *Image) Composite(c Composite, draw *Image, x int, y int) error {
op, err := im.compositeOperator(c)
if err != nil {
return err
}
var ex C.ExceptionInfo
C.GetExceptionInfo(&ex)
defer C.DestroyExceptionInfo(&ex)
var data C.CompositeData
data.composite = C.int(op)
data.draw = draw.image
data.x = C.int(x)
data.y = C.int(y)
res, err := im.applyDataFunc("compositing", C.ImageDataFunc(C.compositeImage), &data)
// res.image will be != than im.image when im is a non
// coalesced animation
if res.image != im.image {
unrefImages(im.image)
initializeRefCounts(res.image)
refImages(res.image)
im.image = res.image
dontFree(res)
}
return err
}
// Composite modifies the image, drawing the draw Image argument at offset
// (x, y) using the c Composite operation.
func (im *Image) Composite(c Composite, draw *Image, x int, y int) error {
op, err := im.compositeOperator(c)
if err != nil {
return err
}
var ex C.ExceptionInfo
C.GetExceptionInfo(&ex)
defer C.DestroyExceptionInfo(&ex)
var data C.CompositeData
data.composite = C.int(op)
data.draw = draw.image
data.x = C.int(x)
data.y = C.int(y)
_, err = im.applyDataFunc("compositing", C.ImageDataFunc(C.compositeImage), &data)
return err
}