ozone: Introduce ClientPixmap and ClientPixmapFactory for non-GPU processes.

ui/ozone/public/client_native_pixmap_factory.h

+// 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 UI_OZONE_PUBLIC_CLIENT_NATIVE_PIXMAP_FACTORY_H_
+#define UI_OZONE_PUBLIC_CLIENT_NATIVE_PIXMAP_FACTORY_H_
+
+#include <vector>
+
+#include "base/memory/scoped_ptr.h"
+#include "ui/gfx/buffer_types.h"
+#include "ui/gfx/geometry/size.h"
+#include "ui/ozone/ozone_export.h"
+#include "ui/ozone/public/client_native_pixmap.h"
+
+namespace base {
+
+struct FileDescriptor;
+
+}  // namespace base
+
+namespace ui {
+
+// The Ozone interface allows external implementations to hook into Chromium to
+// provide a client pixmap for non-GPU processes.
+class OZONE_EXPORT ClientNativePixmapFactory {
+ public:
+  static ClientNativePixmapFactory* GetInstance();
+  static void SetInstance(ClientNativePixmapFactory* instance);
+
+  static scoped_ptr<ClientNativePixmapFactory> Create();
+
+  virtual ~ClientNativePixmapFactory();
+
+  struct Configuration {
+    gfx::BufferFormat format;
+    gfx::BufferUsage usage;
+  };
+
+  // Gets supported format/usage configurations.
+  virtual std::vector<Configuration> GetSupportedConfigurations() const = 0;
+
+  // TODO(dshwang): implement it. crbug.com/475633
+  // Import the native pixmap from |handle| to be used in non-GPU processes.
+  virtual scoped_ptr<ClientNativePixmap> ImportNativePixmap(
+      const base::FileDescriptor& handle,
+      const gfx::Size& size,
+      gfx::BufferFormat format,
+      gfx::BufferUsage usage) = 0;
+
+ protected:
+  ClientNativePixmapFactory();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ClientNativePixmapFactory);
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PUBLIC_CLIENT_NATIVE_PIXMAP_FACTORY_H_