Split EGLContext in GLContextEGL and GLSurfaceEGL.

ui/gfx/gl/gl_surface.h

 // Copyright (c) 2011 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_GFX_GL_GL_CONTEXT_H_
-#define UI_GFX_GL_GL_CONTEXT_H_
+#ifndef UI_GFX_GL_GL_SURFACE_H_
+#define UI_GFX_GL_GL_SURFACE_H_
 #pragma once
 
-#include <string>
-
 #include "build/build_config.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
 
 namespace gfx {
 
-// Encapsulates an OpenGL context, hiding platform specific management.
-class GLContext {
+// Encapsulates a surface that can be rendered to with GL, hiding platform
+// specific management.
+class GLSurface {
  public:
-  GLContext() {}
-  virtual ~GLContext() {}
+  GLSurface() {}
+  virtual ~GLSurface() {}
 
-  // Destroys the GL context.
+  // Destroys the surface.
   virtual void Destroy() = 0;
 
-  // Makes the GL context current on the current thread.
-  virtual bool MakeCurrent() = 0;
-
-  // Returns true if this context is current.
-  virtual bool IsCurrent() = 0;
-
-  // Returns true if this context is offscreen.
+  // Returns true if this surface is offscreen.
   virtual bool IsOffscreen() = 0;
 
   // Swaps front and back buffers. This has no effect for off-screen
   // contexts.
   virtual bool SwapBuffers() = 0;
 
-  // Get the size of the back buffer.
+  // Get the size of the surface.
   virtual gfx::Size GetSize() = 0;
 
-  // Get the underlying platform specific GL context "handle".
+  // Get the underlying platform specific surface "handle".
   virtual void* GetHandle() = 0;
 
-  // Set swap interval. This context must be current.
-  virtual void SetSwapInterval(int interval) = 0;
-
-  // Returns the internal frame buffer object name if the context is backed by
+  // Returns the internal frame buffer object name if the surface is backed by
   // FBO. Otherwise returns 0.
   virtual unsigned int GetBackingFrameBufferObject();
 
-  // Returns space separated list of extensions. The context must be current.
-  virtual std::string GetExtensions();
-
-  // Returns whether the current context supports the named extension. The
-  // context must be current.
-  bool HasExtension(const char* name);
-
-  static bool InitializeOneOff();
-
 #if !defined(OS_MACOSX)
-  // Create a GL context that renders directly to a view.
-  static GLContext* CreateViewGLContext(gfx::PluginWindowHandle window,
-                                        bool multisampled);
+  // Create a surface corresponding to a view.
+  static GLSurface* CreateViewGLContext(gfx::PluginWindowHandle window);
 #endif
 
-  // Create a GL context used for offscreen rendering. It is initially backed by
-  // a 1x1 pbuffer. Use it to create an FBO to do useful rendering.
-  // |share_context|, if non-NULL, is a context which the internally created
-  // OpenGL context shares textures and other resources.
-  static GLContext* CreateOffscreenGLContext(GLContext* shared_context);
-
- protected:
-  bool InitializeCommon();
+  // Create a surface used for offscreen rendering.
+  static GLSurface* CreateOffscreenGLContext(const gfx::Size& size);
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(GLContext);
+  DISALLOW_COPY_AND_ASSIGN(GLSurface);
 };
 
 }  // namespace gfx
 
-#endif  // UI_GFX_GL_GL_CONTEXT_H_
+#endif  // UI_GFX_GL_GL_SURFACE_H_