1 files changed, 64 insertions, 0 deletions
diff --git a/gfx/gl/gl_context.h b/gfx/gl/gl_context.h
new file mode 100644
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--- /dev/null
+++ b/gfx/gl/gl_context.h
@@ -0,0 +1,64 @@
+// Copyright (c) 2010 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 GFX_GL_GL_CONTEXT_H_
+#define GFX_GL_GL_CONTEXT_H_
+
+#include "build/build_config.h"
+#include "gfx/native_widget_types.h"
+#include "gfx/size.h"
+#include "gpu/command_buffer/common/logging.h"
+
+namespace gfx {
+
+bool InitializeGLEW();
+
+// Encapsulates an OpenGL context, hiding platform specific management.
+class GLContext {
+ public:
+  GLContext() {}
+  virtual ~GLContext() {}
+
+  // Destroys the GL context.
+  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.
+  virtual bool IsOffscreen() = 0;
+
+  // Swaps front and back buffers. This has no effect for off-screen
+  // contexts.
+  virtual void SwapBuffers() = 0;
+
+  // Get the size of the back buffer.
+  virtual gfx::Size GetSize() = 0;
+
+  // Get the underlying platform specific GL context "handle".
+  virtual void* GetHandle() = 0;
+
+#if !defined(OS_MACOSX)
+  // Create a GL context that renders directly to a view.
+  static GLContext* CreateViewGLContext(gfx::PluginWindowHandle window,
+                                        bool multisampled);
+#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.
+  static GLContext* CreateOffscreenGLContext(void* shared_handle);
+
+ protected:
+  bool InitializeCommon();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(GLContext);
+};
+
+}  // namespace gfx
+
+#endif  // GFX_GL_GL_CONTEXT_H_