func vipsPreSave(image *C.VipsImage, o *vipsSaveOptions) (*C.VipsImage, error) {
// Remove ICC profile metadata
if o.NoProfile {
C.remove_profile(image)
}
// Use a default interpretation and cast it to C type
if o.Interpretation == 0 {
o.Interpretation = INTERPRETATION_sRGB
}
interpretation := C.VipsInterpretation(o.Interpretation)
// Apply the proper colour space
var outImage *C.VipsImage
if vipsColourspaceIsSupported(image) {
err := int(C.vips_colourspace_bridge(image, &outImage, interpretation))
if err != 0 {
return nil, catchVipsError()
}
C.g_object_unref(C.gpointer(image))
image = outImage
}
return image, 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
}