gpu: Add support for GLX_EXT_texture_from_pixmap extension.

ui/gl/gl_image.h

+// Copyright (c) 2012 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_GL_GL_IMAGE_H_
+#define UI_GL_GL_IMAGE_H_
+
+#include "base/memory/ref_counted.h"
+#include "ui/gfx/native_widget_types.h"
+#include "ui/gfx/size.h"
+#include "ui/gl/gl_bindings.h"
+#include "ui/gl/gl_export.h"
+
+namespace gfx {
+
+class GLSurface;
+
+// Encapsulates an image that can be bound to a texture, hiding platform
+// specific management.
+class GL_EXPORT GLImage : public base::RefCounted<GLImage> {
+ public:
+  GLImage();
+
+  // Destroys the image.
+  virtual void Destroy() = 0;
+
+  // Get the size of the image.
+  virtual gfx::Size GetSize() = 0;
+
+  // Bind image to texture.

[piman, 2012/10/12 22:05:11]

Which texture?

[reveman, 2012/10/13 05:25:53]

Bind image to texture currently bound to GL_TEXTURE_2D target.

Updated comment.

+  virtual bool BindTexImage();
+
+  // Release image from texture.
+  virtual void ReleaseTexImage();
+
+  // Create a GL image for a window.
+  static scoped_refptr<GLImage> CreateGLImage(gfx::PluginWindowHandle window);
+
+ protected:
+  virtual ~GLImage();
+
+ private:
+  friend class base::RefCounted<GLImage>;
+
+  DISALLOW_COPY_AND_ASSIGN(GLImage);
+};
+
+}  // namespace gfx
+
+#endif  // UI_GL_GL_IMAGE_H_