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* Copyright 2008 The Android Open Source Project
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#include "SkImageEncoderPriv.h"
#if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS)
#include "mac/SkUniqueCFRef.h"
#include "SkBitmap.h"
#include "SkCGUtils.h"
#include "SkColorData.h"
#include "SkData.h"
#include "SkStream.h"
#include "SkStreamPriv.h"
#include "SkTemplates.h"
#include "SkUnPreMultiply.h"
#include <ApplicationServices/ApplicationServices.h>
#include <CoreGraphics/CoreGraphics.h>
#include <ImageIO/ImageIO.h>
#include <MobileCoreServices/MobileCoreServices.h>
static size_t consumer_put(void* info, const void* buffer, size_t count) {
SkWStream* stream = reinterpret_cast<SkWStream*>(info);
return stream->write(buffer, count) ? count : 0;
static void consumer_release(void* info) {
// we do nothing, since by design we don't "own" the stream (i.e. info)
static SkUniqueCFRef<CGDataConsumerRef> SkStreamToCGDataConsumer(SkWStream* stream) {
CGDataConsumerCallbacks procs;
procs.putBytes = consumer_put;
procs.releaseConsumer = consumer_release;
// we don't own/reference the stream, so it our consumer must not live
// longer that our caller's ownership of the stream
return SkUniqueCFRef<CGDataConsumerRef>(CGDataConsumerCreate(stream, &procs));
static SkUniqueCFRef<CGImageDestinationRef> SkStreamToImageDestination(SkWStream* stream,
CFStringRef type) {
SkUniqueCFRef<CGDataConsumerRef> consumer = SkStreamToCGDataConsumer(stream);
if (nullptr == consumer) {
return nullptr;
return SkUniqueCFRef<CGImageDestinationRef>(
CGImageDestinationCreateWithDataConsumer(consumer.get(), type, 1, nullptr));
/* Encode bitmaps via CGImageDestination. We setup a DataConsumer which writes
to our SkWStream. Since we don't reference/own the SkWStream, our consumer
must only live for the duration of the onEncode() method.
bool SkEncodeImageWithCG(SkWStream* stream, const SkPixmap& pixmap, SkEncodedImageFormat format) {
SkBitmap bm;
if (!bm.installPixels(pixmap)) {
return false;
CFStringRef type;
switch (format) {
case SkEncodedImageFormat::kICO:
type = kUTTypeICO;
case SkEncodedImageFormat::kBMP:
type = kUTTypeBMP;
case SkEncodedImageFormat::kGIF:
type = kUTTypeGIF;
case SkEncodedImageFormat::kJPEG:
type = kUTTypeJPEG;
case SkEncodedImageFormat::kPNG:
// PNG encoding an ARGB_4444 bitmap gives the following errors in GM:
// <Error>: CGImageDestinationAddImage image could not be converted to destination
// format.
// <Error>: CGImageDestinationFinalize image destination does not have enough images
// So instead we copy to 8888.
if (bm.colorType() == kARGB_4444_SkColorType) {
SkBitmap bitmapN32;
bm.readPixels(, bitmapN32.getPixels(), bitmapN32.rowBytes(), 0, 0);
type = kUTTypePNG;
return false;
SkUniqueCFRef<CGImageDestinationRef> dst = SkStreamToImageDestination(stream, type);
if (nullptr == dst) {
return false;
SkUniqueCFRef<CGImageRef> image(SkCreateCGImageRef(bm));
if (nullptr == image) {
return false;
CGImageDestinationAddImage(dst.get(), image.get(), nullptr);
return CGImageDestinationFinalize(dst.get());
#endif//defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS)