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Diffstat (limited to 'components/exo/shared_memory.h')
| -rw-r--r-- | components/exo/shared_memory.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/components/exo/shared_memory.h b/components/exo/shared_memory.h new file mode 100644 index 0000000..53ba8ce --- /dev/null +++ b/components/exo/shared_memory.h @@ -0,0 +1,42 @@ +// 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 "base/basictypes.h" +#include "base/memory/scoped_ptr.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. + scoped_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_ |
