gpu: Add support for GLX_EXT_texture_from_pixmap extension.

Implement CHROMIUM_texture_from_image. This extension behaves just like
EXT_texture_from_pixmap but uses chromium specific image identifiers rather
than platform specific pixmap IDs.

Add IPC message for creating an image identifier using a
gfx::PluginWindowHandle. Each GPU channel maintains a different set of
images and deleting an image will cause the internal image representation
to be freed once it's no longer bound to a texture.

BUG=132342
TEST=gpu_unittests --gtest_filter=TextureInfoTest.GetLevelImage:GLES2DecoderTest.BindTexImage2DCHROMIUM:GLES2DecoderTest.ReleaseTexImage2DCHROMIUM and manual

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=162654

Review URL: https://codereview.chromium.org/10543125

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@162784 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 50 insertions, 0 deletions

diff --git a/ui/gl/gl_image.h b/ui/gl/gl_image.h
new file mode 100644
index 0000000..8df7c71
--- /dev/null
+++ b/ui/gl/gl_image.h
@@ -0,0 +1,50 @@
+// 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 currently bound to GL_TEXTURE_2D target.
+  virtual bool BindTexImage();
+
+  // Release image from texture currently bound to GL_TEXTURE_2D target.
+  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_