func (prc *CorrectionProcessor) process(nim image.Image, params imageserver.Params) (image.Image, error) {
original := nim
nim, _ = prc.before.Process(nim, params)
nim, err := prc.Processor.Process(nim, params)
if err != nil {
return nil, err
}
nim, _ = prc.after.Process(nim, params)
if isHighQuality(nim) && !isHighQuality(original) {
newNim := imageserver_image_internal.NewDrawableSize(original, nim.Bounds())
imageserver_image_internal.Copy(newNim, nim)
nim = newNim
}
return nim, nil
}
func (prc *ResizeProcessor) process(nim image.Image, params imageserver.Params) (image.Image, error) {
width, height, err := prc.getSize(params)
if err != nil {
return nil, err
}
if width == 0 && height == 0 {
return nim, err
}
f, err := prc.getFilter(width, height, params)
if err != nil {
return nil, err
}
g := gift.New(f)
out := imageserver_image_internal.NewDrawableSize(nim, g.Bounds(nim.Bounds()))
g.Draw(out, nim)
return out, nil
}
func (prc *RotateProcessor) process(nim image.Image, params imageserver.Params) (image.Image, error) {
rot, err := prc.getRotation(params)
if err != nil {
return nil, err
}
if rot == 0 {
return nim, nil
}
f, err := prc.getFilter(rot, params)
if err != nil {
return nil, err
}
g := gift.New(f)
out := imageserver_image_internal.NewDrawableSize(nim, g.Bounds(nim.Bounds()))
g.Draw(out, nim)
return out, nil
}