// Changes the size of the canvas, returns true on success.
func (cv Canvas) Resize(width uint, height uint) bool {
status := C.MagickResizeImage(cv.wand, C.size_t(width), C.size_t(height), C.GaussianFilter, C.double(1.0))
if status == C.MagickFalse {
return false
}
return true
}
func (img *Image) Resize(width int, height int) {
wand := img.wand
cur_width := float64(C.MagickGetImageWidth(wand))
cur_height := float64(C.MagickGetImageHeight(wand))
r_width := cur_width / float64(width)
r_height := cur_height / float64(height)
ratio := r_height
if r_width < r_height {
ratio = r_width
}
dest_width := cur_width / ratio
dest_height := cur_height / ratio
crop_x := int((dest_width - float64(width)) / 2)
crop_y := int((dest_height - float64(height)) / 2)
if r_width > 5 && r_height > 5 {
C.MagickSampleImage(wand, C.size_t(dest_width*5), C.size_t(dest_height*5))
}
C.MagickResizeImage(wand, C.size_t(dest_width), C.size_t(dest_height), C.LanczosFilter, 1)
C.MagickCropImage(wand, C.size_t(width), C.size_t(height), C.ssize_t(crop_x), C.ssize_t(crop_y))
}
// Changes the size of the canvas using specified filter and blur, returns true on success.
func (self *Canvas) ResizeWithFilter(width uint, height uint, filter uint, blur float32) error {
if width == 0 && height == 0 {
return errors.New("Please specify at least one of dimensions")
}
if width == 0 || height == 0 {
origHeight := uint(C.MagickGetImageHeight(self.wand))
origWidth := uint(C.MagickGetImageWidth(self.wand))
if width == 0 {
ratio := float32(origHeight) / float32(height)
width = uint(float32(origWidth) / ratio)
}
if height == 0 {
ratio := float32(origWidth) / float32(width)
height = uint(float32(origHeight) / ratio)
}
}
success := C.MagickResizeImage(self.wand, C.size_t(width), C.size_t(height), C.FilterTypes(filter), C.double(blur))
if success == C.MagickFalse {
return fmt.Errorf("Could not resize: %s", self.Error())
}
return nil
}
/* Scales an image to the desired dimensions. */
func (w *MagickWand) ResizeImage(columns, rows uint, filter int, blur float64) error {
if C.MagickResizeImage(w.wand, C.size_t(columns), C.size_t(rows), C.FilterTypes(filter), C.double(blur)) == C.MagickFalse {
eStr, eCode := w.Exception()
return fmt.Errorf("Resize() failed : [%d] %s", eStr, eCode)
}
return nil
}
// Private: resize the current image to new width and height
//
// Params:
// - width: width of the new image
// - height: height of the new image
//
// Examples:
// m.resize(100, 100)
func (m *Mage) resize(width, height int) bool {
return mBoolean(C.MagickResizeImage(
m.wand,
C.size_t(width),
C.size_t(height),
C.LanczosFilter,
C.double(1.0)))
}
// Changes the size of the canvas, returns true on success.
func (self *Canvas) Resize(width uint, height uint) error {
success := C.MagickResizeImage(self.wand, C.size_t(width), C.size_t(height), C.GaussianFilter, C.double(1.0))
if success == C.MagickFalse {
return fmt.Errorf("Could not resize: %s", self.Error())
}
return nil
}
func (this *Image) Resize(width int64, height int64) error {
if this.magickWand == nil {
return errors.New("error resizing image:magickwand is nil")
}
status := C.MagickResizeImage(this.magickWand, C.ulong(width), C.ulong(height), C.CubicFilter, 0.5)
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 resizing image: %s (ExceptionType = %d)", C.GoString(descr), etype))
}
return nil
}
/*
Resize() resizes the size of this image to the given dimensions.
width: width of the resized image
height: height of the resized image
*/
func (this *Image) Resize(width int64, height int64) error {
var err error = nil
tran := this.Cat.NewTransaction("GraphicsMagickCmd", "Resize")
defer func() {
tran.SetStatus(err)
tran.Complete()
}()
if this.magickWand == nil {
err = errors.New("error resizing image:magickwand is nil")
return err
}
status := C.MagickResizeImage(this.magickWand, C.ulong(width), C.ulong(height), C.CubicFilter, 0.5)
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 resizing image: %s (ExceptionType = %d)", C.GoString(descr), etype))
return err
}
return nil
}
