gecko-dev/gfx/layers/ipc/SharedImageUtils.h

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1.8 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* 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/. */
#ifndef MOZILLA_LAYERS_SHAREDIMAGEUTILS_H
#define MOZILLA_LAYERS_SHAREDIMAGEUTILS_H
#include "gfxSharedImageSurface.h"
#include "gfxPlatform.h"
#include "ShadowLayers.h"
namespace mozilla {
namespace layers {
template<typename Deallocator>
void DeallocSharedImageData(Deallocator* protocol, const SharedImage& aImage)
{
if (aImage.type() == SharedImage::TYCbCrImage) {
protocol->DeallocShmem(aImage.get_YCbCrImage().data());
} else if (aImage.type() == SharedImage::TYUVImage) {
protocol->DeallocShmem(aImage.get_YUVImage().Ydata());
protocol->DeallocShmem(aImage.get_YUVImage().Udata());
protocol->DeallocShmem(aImage.get_YUVImage().Vdata());
} else if (aImage.type() == SharedImage::TSurfaceDescriptor &&
aImage.get_SurfaceDescriptor().type() == SurfaceDescriptor::TShmem) {
protocol->DeallocShmem(aImage.get_SurfaceDescriptor().get_Shmem());
}
}
template<typename Allocator>
bool AllocateSharedBuffer(Allocator* protocol,
const gfxIntSize& aSize,
gfxASurface::gfxContentType aContent,
gfxSharedImageSurface** aBuffer)
{
ipc::SharedMemory::SharedMemoryType shmemType = OptimalShmemType();
gfxASurface::gfxImageFormat format = gfxPlatform::GetPlatform()->OptimalFormatForContent(aContent);
nsRefPtr<gfxSharedImageSurface> back =
gfxSharedImageSurface::CreateUnsafe(protocol, aSize, format, shmemType);
if (!back)
return false;
*aBuffer = nullptr;
back.swap(*aBuffer);
return true;
}
} // namespace
} // namespace
#endif