/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "SourceSurfaceVolatileData.h"

#include "gfxAlphaRecovery.h"
#include "mozilla/Likely.h"
#include "mozilla/Types.h"  // for decltype

namespace mozilla {
namespace gfx {

bool SourceSurfaceVolatileData::Init(const IntSize& aSize, int32_t aStride,
                                     SurfaceFormat aFormat) {
  mSize = aSize;
  mStride = aStride;
  mFormat = aFormat;

  size_t alignment = size_t(1) << gfxAlphaRecovery::GoodAlignmentLog2();
  mVBuf = new VolatileBuffer();
  if (MOZ_UNLIKELY(!mVBuf->Init(aStride * aSize.height, alignment))) {
    mVBuf = nullptr;
    return false;
  }

  return true;
}

void SourceSurfaceVolatileData::GuaranteePersistance() {
  MOZ_ASSERT_UNREACHABLE("Should use SourceSurfaceRawData wrapper!");
}

void SourceSurfaceVolatileData::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf,
                                                    SizeOfInfo& aInfo) const {
  aInfo.AddType(SurfaceType::DATA);
  if (mVBuf) {
    aInfo.mHeapBytes = mVBuf->HeapSizeOfExcludingThis(aMallocSizeOf);
    aInfo.mNonHeapBytes = mVBuf->NonHeapSizeOfExcludingThis();
#ifdef ANDROID
    if (!mVBuf->OnHeap()) {
      // Volatile buffers keep a file handle open on Android.
      aInfo.mExternalHandles = 1;
    }
#endif
  }
}

}  // namespace gfx
}  // namespace mozilla