func Resize(fpath, tpath string, typ, cols, rows int) error {
var mw *C.MagickWand = C.NewMagickWand()
var cfpath = C.CString(fpath)
var ctpath = C.CString(tpath)
var etype C.ExceptionType
defer func() {
C.free(unsafe.Pointer(cfpath))
C.free(unsafe.Pointer(ctpath))
}()
defer func() {
C.ClearMagickWand(mw)
C.DestroyMagickWand(mw)
}()
if C.MagickReadImage(mw, cfpath) == C.MagickFalse {
goto ERR
}
if C.scale(mw, C.int(typ), C.int(cols), C.int(rows)) == C.MagickFalse {
goto ERR
}
if C.MagickWriteImages(mw, ctpath, C.MagickTrue) == C.MagickFalse {
goto ERR
}
return nil
ERR:
etype = C.MagickGetExceptionType(mw)
return errors.New(C.GoString(C.MagickGetException(mw, &etype)))
}
// Destroys canvas.
func (self Canvas) Destroy() error {
if self.wand != nil {
C.DestroyMagickWand(self.wand)
self.wand = nil
}
if self.bg != nil {
C.DestroyPixelWand(self.bg)
self.bg = nil
}
if self.fg != nil {
C.DestroyPixelWand(self.fg)
self.fg = nil
}
if self.stroke != nil {
C.DestroyPixelWand(self.stroke)
self.stroke = nil
}
if self.fill != nil {
C.DestroyPixelWand(self.fill)
self.fill = nil
}
if self.drawing != nil {
C.DestroyDrawingWand(self.drawing)
self.drawing = nil
}
return fmt.Errorf("Nothing to destroy")
}
// Deallocates memory associated with an MagickWand
func (mw *MagickWand) Destroy() {
if mw.mw == nil {
return
}
mw.mw = C.DestroyMagickWand(mw.mw)
C.free(unsafe.Pointer(mw.mw))
mw.mw = nil
}
// Deallocates memory associated with an MagickWand
func (mw *MagickWand) Destroy() {
if mw.mw == nil {
return
}
mw.mw = C.DestroyMagickWand(mw.mw)
relinquishMemory(unsafe.Pointer(mw.mw))
mw.mw = nil
}
// Destroys canvas.
func (self Canvas) Destroy() error {
if self.wand != nil {
C.DestroyMagickWand(self.wand)
self.wand = nil
return nil
}
return fmt.Errorf("Nothing to destroy")
//C.MagickWandTerminus()
}
// 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)
}
/*
DestroyWand() deallocates memory associated with this Image wand.
*/
func (this *Image) DestoryWand() {
var err error = nil
tran := this.Cat.NewTransaction("GraphicsMagickCmd", "DestoryWand")
defer func() {
tran.SetStatus(err)
tran.Complete()
}()
if this.magickWand != nil {
C.DestroyMagickWand(this.magickWand)
this.magickWand = (*C.MagickWand)(nil)
}
}
// Converts the current image into a thumbnail of the specified
// width and height preserving ratio. It uses Crop() to clip the
// image to the specified area.
//
// If width or height are bigger than the current image, a centered
// thumbnail will be produced.
//
// Is width and height are smaller than the current image, the image
// will be resized and cropped, if needed.
func (self *Canvas) Thumbnail(width uint, height uint) error {
var ratio float64
// Normalizing image.
ratio = math.Min(float64(self.Width())/float64(width), float64(self.Height())/float64(height))
if ratio < 1.0 {
// Origin image is smaller than the thumbnail image.
max := uint(math.Max(float64(width), float64(height)))
// Empty replacement buffer with transparent background.
replacement := New()
replacement.SetBackgroundColor("none")
replacement.Blank(max, max)
// Putting original image in the center of the replacement canvas.
replacement.AppendCanvas(self, int(int(width-self.Width())/2), int(int(height-self.Height())/2))
// Replacing wand
C.DestroyMagickWand(self.wand)
self.wand = C.CloneMagickWand(replacement.wand)
} else {
// Is bigger, just resizing.
err := self.Resize(uint(float64(self.Width())/ratio), uint(float64(self.Height())/ratio))
if err != nil {
return err
}
}
// Now we have an image that we can use to crop the thumbnail from.
err := self.Crop(int(int(self.Width()-width)/2), int(int(self.Height()-height)/2), width, height)
if err != nil {
return err
}
return nil
}
// Destroys canvas.
func (self *Canvas) Destroy() error {
if self.bg != nil {
C.DestroyPixelWand(self.bg)
self.bg = nil
}
if self.fg != nil {
C.DestroyPixelWand(self.fg)
self.fg = nil
}
if self.stroke != nil {
C.DestroyPixelWand(self.stroke)
self.stroke = nil
}
if self.fill != nil {
C.DestroyPixelWand(self.fill)
self.fill = nil
}
if self.drawing != nil {
C.DestroyDrawingWand(self.drawing)
self.drawing = nil
}
if self.wand == nil {
return errors.New("Nothing to destroy")
} else {
C.DestroyMagickWand(self.wand)
self.wand = nil
}
if self.text != nil && self.text.UnderColor != nil {
C.DestroyPixelWand(self.text.UnderColor)
self.text.UnderColor = nil
}
return nil
}
// Destroys canvas.
func (cv Canvas) Destroy() {
if cv.wand != nil {
C.DestroyMagickWand(cv.wand)
}
C.MagickWandTerminus()
}
/* Deallocates memory associated with an MagickWand. */
func (w *MagickWand) Destroy() {
C.DestroyMagickWand(w.wand)
}
func (img *Image) Close() {
C.DestroyMagickWand(img.wand)
}
/*
DestroyWand() deallocates memory associated with this Image wand.
*/
func (this *Image) DestoryWand() {
if this.magickWand != nil {
C.DestroyMagickWand(this.magickWand)
this.magickWand = (*C.MagickWand)(nil)
}
}
func (m *Mage) Destroy() {
defer C.DestroyMagickWand(m.wand)
}