// Creates an empty canvas of the given dimensions.
func (cv Canvas) Blank(width uint, height uint) bool {
status := C.MagickNewImage(cv.wand, C.size_t(width), C.size_t(height), cv.bg)
if status == C.MagickFalse {
return false
}
return true
}
// Adds a blank image canvas of the specified size and background color to the
// wand.
func (w *MagickWand) NewImage(cols, rows uint, bg *PixelWand) error {
if C.MagickNewImage(w.wand, C.size_t(cols), C.size_t(rows), bg.wand) == C.MagickFalse {
eStr, eCode := w.Exception()
return fmt.Errorf("NewImage() failed : [%d] %s", eStr, eCode)
}
return nil
}
// Creates an empty canvas of the given dimensions.
func (self *Canvas) Blank(width uint, height uint) error {
success := C.MagickNewImage(self.wand, C.size_t(width), C.size_t(height), self.bg)
if success == C.MagickFalse {
return fmt.Errorf("Could not create image: %s", self.Error())
}
return nil
}
// Private: Create a blank magick wand with size width and height
//
// Params:
// - format: format of the new image
// - width: width of the new image
// - height: height of the new image
//
// Examples
// blankWand("jpg", 100, 100)
//
// Return *C.MagickWand
func blankWand(format string, width, height int) *C.MagickWand {
wand := C.NewMagickWand()
cformat := C.CString(format)
noneBackground := C.CString("none")
defer C.free(unsafe.Pointer(cformat))
defer C.free(unsafe.Pointer(noneBackground))
C.MagickSetFormat(wand, C.CString(format))
pixel := C.NewPixelWand()
defer C.DestroyPixelWand(pixel)
C.PixelSetColor(pixel, noneBackground)
C.MagickSetSize(wand, C.size_t(width), C.size_t(height))
C.MagickNewImage(wand, C.size_t(width), C.size_t(height), pixel)
return wand
}