/* -*- 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::AddSizeOfExcludingThis(MallocSizeOf aMallocSizeOf,

                                                  size_t& aHeapSizeOut,

                                                  size_t& aNonHeapSizeOut,

                                                  size_t& aExtHandlesOut) const

{

  if (mVBuf) {

    aHeapSizeOut += mVBuf->HeapSizeOfExcludingThis(aMallocSizeOf);

    aNonHeapSizeOut += mVBuf->NonHeapSizeOfExcludingThis();

#ifdef ANDROID

    if (!mVBuf->OnHeap()) {

      // Volatile buffers keep a file handle open on Android.

      ++aExtHandlesOut;

    }

#endif

  }

}

} // namespace gfx

} // namespace mozilla