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 "SkDecodingImageGenerator.h" 12 #include "SkDiscardableMemoryPool.h" 13 #include "SkImageGeneratorPriv.h" 14 #include "SkForceLinking.h" 15 16 #include "SkCommandLineFlags.h" 17 18 __SK_FORCE_IMAGE_DECODER_LINKING; 19 20 DEFINE_bool(useVolatileCache, false, "Use a volatile cache for deferred image decoding pixels. " 21 "Only meaningful if --deferImageDecoding is set to true and the platform has an " 22 "implementation."); 23 24 // Fits SkPicture::InstallPixelRefProc call signature. 25 // Used in SkPicturePlayback::CreateFromStream 26 bool sk_tools::LazyDecodeBitmap(const void* src, 27 size_t length, 28 SkBitmap* dst) { 29 SkAutoDataUnref data(SkData::NewWithCopy(src, length)); 30 if (NULL == data.get()) { 31 return false; 32 } 33 34 SkAutoTDelete<SkImageGenerator> gen( 35 SkDecodingImageGenerator::Create( 36 data, SkDecodingImageGenerator::Options())); 37 SkImageInfo info; 38 if ((NULL == gen.get()) || !gen->getInfo(&info)) { 39 return false; 40 } 41 SkDiscardableMemory::Factory* pool = NULL; 42 if ((!FLAGS_useVolatileCache) || (info.fWidth * info.fHeight < 32 * 1024)) { 43 // how to do switching with SkDiscardableMemory. 44 pool = SkGetGlobalDiscardableMemoryPool(); 45 // Only meaningful if platform has a default discardable 46 // memory implementation that differs from the global DM pool. 47 } 48 return SkInstallDiscardablePixelRef(gen.detach(), dst, pool); 49 } 50
