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-rw-r--r--gfx/layers/BufferTexture.h129
1 files changed, 129 insertions, 0 deletions
diff --git a/gfx/layers/BufferTexture.h b/gfx/layers/BufferTexture.h
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+/* -*- 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/. */
+
+#ifndef MOZILLA_LAYERS_BUFFERETEXTURE
+#define MOZILLA_LAYERS_BUFFERETEXTURE
+
+#include "mozilla/RefPtr.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/gfx/Types.h"
+#include "mozilla/ipc/SharedMemory.h"
+#include "mozilla/layers/TextureClient.h"
+
+namespace mozilla {
+namespace layers {
+
+class BufferTextureData : public TextureData {
+ public:
+ // ShmemAllocator needs to implement IShmemAllocator and IsSameProcess,
+ // as done in LayersIPCChannel and ISurfaceAllocator.
+ template <typename ShmemAllocator>
+ static BufferTextureData* Create(gfx::IntSize aSize,
+ gfx::SurfaceFormat aFormat,
+ gfx::BackendType aMoz2DBackend,
+ LayersBackend aLayersBackend,
+ TextureFlags aFlags,
+ TextureAllocationFlags aAllocFlags,
+ ShmemAllocator aAllocator);
+
+ static BufferTextureData* CreateForYCbCr(
+ KnowsCompositor* aAllocator, const gfx::IntRect& aDisplay,
+ const gfx::IntSize& aYSize, uint32_t aYStride,
+ const gfx::IntSize& aCbCrSize, uint32_t aCbCrStride,
+ StereoMode aStereoMode, gfx::ColorDepth aColorDepth,
+ gfx::YUVColorSpace aYUVColorSpace, gfx::ColorRange aColorRange,
+ gfx::ChromaSubsampling aSubsampling, TextureFlags aTextureFlags);
+
+ bool Lock(OpenMode aMode) override { return true; }
+
+ void Unlock() override {}
+
+ void FillInfo(TextureData::Info& aInfo) const override;
+
+ already_AddRefed<gfx::DrawTarget> BorrowDrawTarget() override;
+
+ bool BorrowMappedData(MappedTextureData& aMap) override;
+
+ bool BorrowMappedYCbCrData(MappedYCbCrTextureData& aMap) override;
+
+ // use TextureClient's default implementation
+ bool UpdateFromSurface(gfx::SourceSurface* aSurface) override;
+
+ BufferTextureData* AsBufferTextureData() override { return this; }
+
+ Maybe<gfx::IntSize> GetYSize() const;
+
+ Maybe<gfx::IntSize> GetCbCrSize() const;
+
+ Maybe<int32_t> GetYStride() const;
+
+ Maybe<int32_t> GetCbCrStride() const;
+
+ Maybe<gfx::YUVColorSpace> GetYUVColorSpace() const;
+
+ Maybe<gfx::ColorDepth> GetColorDepth() const;
+
+ Maybe<StereoMode> GetStereoMode() const;
+
+ Maybe<gfx::ChromaSubsampling> GetChromaSubsampling() const;
+
+ gfx::IntRect GetPictureRect() const;
+
+ gfx::IntSize GetSize() const;
+
+ gfx::SurfaceFormat GetFormat() const;
+
+ virtual size_t GetBufferSize() = 0;
+
+ protected:
+ static BufferTextureData* Create(
+ gfx::IntSize aSize, gfx::SurfaceFormat aFormat,
+ gfx::BackendType aMoz2DBackend, LayersBackend aLayersBackend,
+ TextureFlags aFlags, TextureAllocationFlags aAllocFlags,
+ mozilla::ipc::IShmemAllocator* aAllocator, bool aIsSameProcess);
+
+ static BufferTextureData* CreateInternal(LayersIPCChannel* aAllocator,
+ const BufferDescriptor& aDesc,
+ gfx::BackendType aMoz2DBackend,
+ int32_t aBufferSize,
+ TextureFlags aTextureFlags);
+
+ virtual uint8_t* GetBuffer() = 0;
+
+ BufferTextureData(const BufferDescriptor& aDescriptor,
+ gfx::BackendType aMoz2DBackend)
+ : mDescriptor(aDescriptor), mMoz2DBackend(aMoz2DBackend) {}
+
+ ~BufferTextureData() override = default;
+
+ BufferDescriptor mDescriptor;
+ gfx::BackendType mMoz2DBackend;
+};
+
+template <typename ShmemAllocator>
+inline BufferTextureData* BufferTextureData::Create(
+ gfx::IntSize aSize, gfx::SurfaceFormat aFormat,
+ gfx::BackendType aMoz2DBackend, LayersBackend aLayersBackend,
+ TextureFlags aFlags, TextureAllocationFlags aAllocFlags,
+ ShmemAllocator aAllocator) {
+ return Create(aSize, aFormat, aMoz2DBackend, aLayersBackend, aFlags,
+ aAllocFlags, aAllocator, aAllocator->IsSameProcess());
+}
+
+// nullptr allocator specialization
+template <>
+inline BufferTextureData* BufferTextureData::Create(
+ gfx::IntSize aSize, gfx::SurfaceFormat aFormat,
+ gfx::BackendType aMoz2DBackend, LayersBackend aLayersBackend,
+ TextureFlags aFlags, TextureAllocationFlags aAllocFlags, std::nullptr_t) {
+ return Create(aSize, aFormat, aMoz2DBackend, aLayersBackend, aFlags,
+ aAllocFlags, nullptr, true);
+}
+
+} // namespace layers
+} // namespace mozilla
+
+#endif