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 
Init(const IntSize & aSize,int32_t aStride,SurfaceFormat aFormat)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 
GuaranteePersistance()32 void SourceSurfaceVolatileData::GuaranteePersistance() {
33   MOZ_ASSERT_UNREACHABLE("Should use SourceSurfaceRawData wrapper!");
34 }
35 
SizeOfExcludingThis(MallocSizeOf aMallocSizeOf,SizeOfInfo & aInfo) const36 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
53