blob: 3b6f17e741195e8e6ab362a5e737f932db4748cf [file] [log] [blame]
* Copyright 2013 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#include "LazyDecodeBitmap.h"
#include "SkData.h"
#include "SkDiscardableMemoryPool.h"
#include "SkImageGeneratorPriv.h"
#include "SkForceLinking.h"
#include "SkCommandLineFlags.h"
DEFINE_bool(useVolatileCache, false, "Use a volatile cache for deferred image decoding pixels. "
"Only meaningful if --deferImageDecoding is set to true and the platform has an "
// Fits SkPicture::InstallPixelRefProc call signature.
// Used in SkPictureData::CreateFromStream
bool sk_tools::LazyDecodeBitmap(const void* src, size_t length, SkBitmap* dst) {
SkAutoDataUnref data(SkData::NewWithCopy(src, length));
if (NULL == data.get()) {
return false;
SkAutoTDelete<SkImageGenerator> gen(SkImageGenerator::NewFromData(data));
if (NULL == gen.get()) {
return false;
const SkImageInfo info = gen->getInfo();
SkDiscardableMemory::Factory* pool = NULL;
if ((!FLAGS_useVolatileCache) || (info.width() * info.height() < 32 * 1024)) {
// how to do switching with SkDiscardableMemory.
pool = SkGetGlobalDiscardableMemoryPool();
// Only meaningful if platform has a default discardable
// memory implementation that differs from the global DM pool.
return SkInstallDiscardablePixelRef(gen.detach(), dst, pool);