Index: components/exo/shared_memory.h |
diff --git a/components/exo/shared_memory.h b/components/exo/shared_memory.h |
new file mode 100644 |
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+++ b/components/exo/shared_memory.h |
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+// 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 "components/exo/exo_export.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 EXO_EXPORT 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); |
lpique
2015/11/11 19:22:07
It's a bit inconsistent that offset is unsigned an
reveman
2015/11/11 19:45:19
Negative stride is a valid use-case even though we
|
+ |
+ private: |
+ base::SharedMemory shared_memory_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(SharedMemory); |
+}; |
+ |
+} // namespace exo |
+ |
+#endif // COMPONENTS_EXO_SHARED_MEMORY_H_ |