1 /* 2 * Copyright 2013 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "LazyDecodeBitmap.h" 9 10 #include "SkData.h" 11 #include "SkDiscardableMemoryPool.h" 12 #include "SkImageGeneratorPriv.h" 13 #include "SkForceLinking.h" 14 15 #include "SkCommandLineFlags.h" 16 17 __SK_FORCE_IMAGE_DECODER_LINKING; 18 19 DEFINE_bool(useVolatileCache, false, "Use a volatile cache for deferred image decoding pixels. " 20 "Only meaningful if --deferImageDecoding is set to true and the platform has an " 21 "implementation."); 22 23 // Fits SkPicture::InstallPixelRefProc call signature. 24 // Used in SkPictureData::CreateFromStream 25 bool sk_tools::LazyDecodeBitmap(const void* src, size_t length, SkBitmap* dst) { 26 SkAutoDataUnref data(SkData::NewWithCopy(src, length)); 27 if (NULL == data.get()) { 28 return false; 29 } 30 31 SkAutoTDelete<SkImageGenerator> gen(SkImageGenerator::NewFromData(data)); 32 if (NULL == gen.get()) { 33 return false; 34 } 35 const SkImageInfo info = gen->getInfo(); 36 SkDiscardableMemory::Factory* pool = NULL; 37 if ((!FLAGS_useVolatileCache) || (info.width() * info.height() < 32 * 1024)) { 38 // how to do switching with SkDiscardableMemory. 39 pool = SkGetGlobalDiscardableMemoryPool(); 40 // Only meaningful if platform has a default discardable 41 // memory implementation that differs from the global DM pool. 42 } 43 return SkInstallDiscardablePixelRef(gen.detach(), dst, pool); 44 } 45
