gfx/layers/SourceSurfaceVolatileData.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "SourceSurfaceVolatileData.h"
   8
   9 #include "gfxAlphaRecovery.h"
  10 #include "mozilla/Likely.h"
  11 #include "mozilla/Types.h"  // for decltype
  12
  13 namespace mozilla {
  14 namespace gfx {
  15
  16 bool SourceSurfaceVolatileData::Init(const IntSize& aSize, int32_t aStride,
  17                                      SurfaceFormat aFormat) {
  18   mSize = aSize;
  19   mStride = aStride;
  20   mFormat = aFormat;
  21
  22   size_t alignment = size_t(1) << gfxAlphaRecovery::GoodAlignmentLog2();
  23   mVBuf = new VolatileBuffer();
  24   if (MOZ_UNLIKELY(!mVBuf->Init(aStride * aSize.height, alignment))) {
  25     mVBuf = nullptr;
  26     return false;
  27   }
  28
  29   return true;
  30 }
  31
  32 void SourceSurfaceVolatileData::GuaranteePersistance() {
  33   MOZ_ASSERT_UNREACHABLE("Should use SourceSurfaceRawData wrapper!");
  34 }
  35
  36 void SourceSurfaceVolatileData::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf,
  37                                                     SizeOfInfo& aInfo) const {
  38   aInfo.AddType(SurfaceType::DATA);
  39   if (mVBuf) {
  40     aInfo.mHeapBytes = mVBuf->HeapSizeOfExcludingThis(aMallocSizeOf);
  41     aInfo.mNonHeapBytes = mVBuf->NonHeapSizeOfExcludingThis();
  42 #ifdef ANDROID
  43     if (!mVBuf->OnHeap()) {
  44       // Volatile buffers keep a file handle open on Android.
  45       aInfo.mExternalHandles = 1;
  46     }
  47 #endif
  48   }
  49 }
  50
  51 }  // namespace gfx
  52 }  // namespace mozilla