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