func vipsSave(image *C.VipsImage, o vipsSaveOptions) ([]byte, error) {
defer C.g_object_unref(C.gpointer(image))
tmpImage, err := vipsPreSave(image, &o)
if err != nil {
return nil, err
}
// When an image has an unsupported color space, vipsPreSave
// returns the pointer of the image passed to it unmodified.
// When this occurs, we must take care to not dereference the
// original image a second time; we may otherwise erroneously
// free the object twice.
if tmpImage != image {
defer C.g_object_unref(C.gpointer(tmpImage))
}
length := C.size_t(0)
saveErr := C.int(0)
interlace := C.int(boolToInt(o.Interlace))
quality := C.int(o.Quality)
var ptr unsafe.Pointer
switch o.Type {
case WEBP:
saveErr = C.vips_webpsave_bridge(tmpImage, &ptr, &length, 1, quality)
break
case PNG:
saveErr = C.vips_pngsave_bridge(tmpImage, &ptr, &length, 1, C.int(o.Compression), quality, interlace)
break
case GIF:
return nil, errors.New("VIPS cannot save to GIF")
case PDF:
return nil, errors.New("VIPS cannot save to PDF")
case SVG:
return nil, errors.New("VIPS cannot save to SVG")
default:
saveErr = C.vips_jpegsave_bridge(tmpImage, &ptr, &length, 1, quality, interlace)
break
}
if int(saveErr) != 0 {
return nil, catchVipsError()
}
buf := C.GoBytes(ptr, C.int(length))
// Clean up
C.g_free(C.gpointer(ptr))
C.vips_error_clear()
return buf, nil
}
func vipsSave(image *C.struct__VipsImage, o vipsSaveOptions) ([]byte, error) {
length := C.size_t(0)
err := C.int(0)
interlace := C.int(boolToInt(o.Interlace))
// Remove ICC profile metadata
if o.NoProfile {
C.remove_profile(image)
}
// Force RGB color space
var outImage *C.struct__VipsImage
C.vips_colourspace_bridge(image, &outImage)
defer C.g_object_unref(C.gpointer(image))
defer C.g_object_unref(C.gpointer(outImage))
var ptr unsafe.Pointer
switch o.Type {
case PNG:
err = C.vips_pngsave_bridge(outImage, &ptr, &length, 1, C.int(o.Compression), C.int(o.Quality), interlace)
break
case WEBP:
err = C.vips_webpsave_bridge(outImage, &ptr, &length, 1, C.int(o.Quality))
break
default:
err = C.vips_jpegsave_bridge(outImage, &ptr, &length, 1, C.int(o.Quality), interlace)
break
}
if int(err) != 0 {
return nil, catchVipsError()
}
buf := C.GoBytes(ptr, C.int(length))
// Clean up
C.g_free(C.gpointer(ptr))
C.vips_error_clear()
return buf, nil
}
func vipsSave(image *C.VipsImage, o vipsSaveOptions) ([]byte, error) {
defer C.g_object_unref(C.gpointer(image))
tmpImage, err := vipsPreSave(image, &o)
if err != nil {
return nil, err
}
defer C.g_object_unref(C.gpointer(tmpImage))
length := C.size_t(0)
saveErr := C.int(0)
interlace := C.int(boolToInt(o.Interlace))
quality := C.int(o.Quality)
var ptr unsafe.Pointer
switch o.Type {
case WEBP:
saveErr = C.vips_webpsave_bridge(tmpImage, &ptr, &length, 1, quality)
break
case PNG:
saveErr = C.vips_pngsave_bridge(tmpImage, &ptr, &length, 1, C.int(o.Compression), quality, interlace)
break
default:
saveErr = C.vips_jpegsave_bridge(tmpImage, &ptr, &length, 1, quality, interlace)
break
}
if int(saveErr) != 0 {
return nil, catchVipsError()
}
buf := C.GoBytes(ptr, C.int(length))
// Clean up
C.g_free(C.gpointer(ptr))
C.vips_error_clear()
return buf, nil
}