| // Copyright 2020 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef GPU_COMMAND_BUFFER_SERVICE_SHARED_MEMORY_REGION_WRAPPER_H_ |
| #define GPU_COMMAND_BUFFER_SERVICE_SHARED_MEMORY_REGION_WRAPPER_H_ |
| |
| #include <utility> |
| #include <vector> |
| |
| #include "base/containers/span.h" |
| #include "base/memory/shared_memory_mapping.h" |
| #include "base/unguessable_token.h" |
| #include "gpu/gpu_gles2_export.h" |
| #include "third_party/skia/include/core/SkPixmap.h" |
| #include "ui/gfx/buffer_types.h" |
| #include "ui/gfx/geometry/size.h" |
| |
| namespace gfx { |
| struct GpuMemoryBufferHandle; |
| } |
| |
| namespace gpu { |
| |
| // Wrapper for shared memory region from a GpuMemoryBuffer with type |
| // SHARED_MEMORY_BUFFER. |
| class GPU_GLES2_EXPORT SharedMemoryRegionWrapper { |
| public: |
| SharedMemoryRegionWrapper(); |
| SharedMemoryRegionWrapper(SharedMemoryRegionWrapper&& other); |
| SharedMemoryRegionWrapper& operator=(SharedMemoryRegionWrapper&& other); |
| ~SharedMemoryRegionWrapper(); |
| |
| // Validates that size, stride and format parameters make sense and maps |
| // memory for shared memory owned by |handle|. Shared memory stays mapped |
| // until destruction. |
| bool Initialize(const gfx::GpuMemoryBufferHandle& handle, |
| const gfx::Size& size, |
| gfx::BufferFormat format); |
| |
| bool IsValid() const; |
| uint8_t* GetMemory(int plane_index) { |
| return const_cast<uint8_t*>(std::as_const(*this).GetMemory(plane_index)); |
| } |
| const uint8_t* GetMemory(int plane_index) const; |
| size_t GetStride(int plane_index) const; |
| |
| // Returns SkPixmap pointing to memory for offset. |
| SkPixmap MakePixmapForPlane(const SkImageInfo& info, int plane_index) const; |
| |
| base::span<const uint8_t> GetMemoryPlanes() const; |
| |
| const base::UnguessableToken& GetMappingGuid() const; |
| |
| private: |
| struct PlaneData { |
| size_t offset = 0; |
| size_t stride = 0; |
| }; |
| |
| base::WritableSharedMemoryMapping mapping_; |
| std::vector<PlaneData> planes_; |
| }; |
| |
| } // namespace gpu |
| |
| #endif // GPU_COMMAND_BUFFER_SERVICE_SHARED_MEMORY_REGION_WRAPPER_H_ |