| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef COMPONENTS_EXO_SHARED_MEMORY_H_ |
| #define COMPONENTS_EXO_SHARED_MEMORY_H_ |
| |
| #include <memory> |
| |
| #include "base/macros.h" |
| #include "base/memory/shared_memory.h" |
| #include "ui/gfx/buffer_types.h" |
| #include "ui/gfx/geometry/size.h" |
| |
| namespace exo { |
| class Buffer; |
| |
| // Shared memory abstraction. Provides a wrapper around base::SharedMemory |
| // with functionality to create buffers from the memory to use for display. |
| class SharedMemory { |
| public: |
| explicit SharedMemory(const base::SharedMemoryHandle& handle); |
| ~SharedMemory(); |
| |
| // Creates a buffer from the shared memory. The buffer is created offset bytes |
| // into the memory and has width and height as specified. The stride |
| // arguments specifies the number of bytes from beginning of one row to the |
| // beginning of the next. The format is the pixel format of the buffer and |
| // must be one of RGBX_8888, RGBA_8888, BGRX_8888, BGRA_8888. |
| std::unique_ptr<Buffer> CreateBuffer(const gfx::Size& size, |
| gfx::BufferFormat format, |
| unsigned offset, |
| int stride); |
| |
| private: |
| base::SharedMemory shared_memory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(SharedMemory); |
| }; |
| |
| } // namespace exo |
| |
| #endif // COMPONENTS_EXO_SHARED_MEMORY_H_ |