// Puts a canvas on top of the current one.
func (cv Canvas) AppendCanvas(source Canvas, x int, y int) bool {
status := C.MagickCompositeImage(cv.wand, source.wand, C.OverCompositeOp, C.ssize_t(x), C.ssize_t(y))
if status == C.MagickFalse {
return false
}
return true
}
/*
Composite() composite one image onto another at the specified offset.
compositeImg: The composite image
x: The column offset of the composited image.
y: The row offset of the composited image.
*/
func (this *Image) Composite(compositeImg *Image, x int64, y int64) error {
var err error = nil
tran := this.Cat.NewTransaction("GraphicsMagickCmd", "Composite")
defer func() {
tran.SetStatus(err)
tran.Complete()
}()
if this.magickWand == nil {
err = errors.New("error composite image:magickwand is nil")
return err
}
if compositeImg.magickWand == nil {
err = errors.New("error composite image:composite image wand is nil")
return err
}
status := C.MagickCompositeImage(this.magickWand, compositeImg.magickWand, C.OverCompositeOp, C.long(x), C.long(y))
if status == 0 {
var etype int
descr := C.MagickGetException(this.magickWand, (*C.ExceptionType)(unsafe.Pointer(&etype)))
defer C.MagickRelinquishMemory(unsafe.Pointer(descr))
err = errors.New(fmt.Sprintf("error composite image: %s (ExceptionType = %d)", C.GoString(descr), etype))
return err
}
return nil
}
/* Composite one image onto another at the specified offset. */
func (w *MagickWand) CompositeImage(srcWand *MagickWand, compose, x, y int) error {
if C.MagickCompositeImage(w.wand, srcWand.wand, C.CompositeOperator(compose), C.ssize_t(x), C.ssize_t(y)) == C.MagickFalse {
eStr, eCode := w.Exception()
return fmt.Errorf("CompositeImage() failed : [%d] %s", eStr, eCode)
}
return nil
}
// Puts a canvas on top of the current one.
func (self *Canvas) AppendCanvas(source *Canvas, x int, y int) error {
success := C.MagickCompositeImage(self.wand, source.wand, C.OverCompositeOp, C.ssize_t(x), C.ssize_t(y))
if success == C.MagickFalse {
return fmt.Errorf("Could not append image: %s", self.Error())
}
return nil
}
// Private: center the current wand on top of the new wand, after that, we only
// keep the new wand.
//
// Params:
// - newWand: new wand, probably going to be result of blankWand
// - x: x position on the current wand that is the center of the new wand
// - y: y position on the current wand that is the center of the new wand
//
// Example:
// newWand := blankWand("jpg", width, height)
// done := m.compositeCenter(newWand, 10, 10)
//
// Return boolean result of the composition
func (m *Mage) compositeCenter(newWand *C.MagickWand, x, y int) bool {
success := C.MagickCompositeImage(
newWand,
m.wand,
C.OverCompositeOp,
C.ssize_t(x),
C.ssize_t(y))
C.DestroyMagickWand(m.wand)
m.wand = newWand
return mBoolean(success)
}
/*
Composite() composite one image onto another at the specified offset.
compositeImg: The composite image
x: The column offset of the composited image.
y: The row offset of the composited image.
*/
func (this *Image) Composite(compositeImg *Image, x int64, y int64) error {
if this.magickWand == nil {
return errors.New("error composite image:magickwand is nil")
}
if compositeImg.magickWand == nil {
return errors.New("error composite image:composite image wand is nil")
}
compositeImg.Dissolve(100)
status := C.MagickCompositeImage(this.magickWand, compositeImg.magickWand, C.OverCompositeOp, C.long(x), C.long(y))
if status == 0 {
var etype int
descr := C.MagickGetException(this.magickWand, (*C.ExceptionType)(unsafe.Pointer(&etype)))
defer C.MagickRelinquishMemory(unsafe.Pointer(descr))
return errors.New(fmt.Sprintf("error composite image: %s (ExceptionType = %d)", C.GoString(descr), etype))
}
return nil
}