Added EGL based GLContext....

app/gfx/gl/gl_context_egl.h

+// 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 APP_GFX_GL_GL_CONTEXT_EGL_H_
+#define APP_GFX_GL_GL_CONTEXT_EGL_H_
+
+#include "gfx/size.h"
+#include "app/gfx/gl/gl_context.h"
+
+typedef void *EGLContext;
+typedef void* EGLSurface;
+
+namespace gfx {
+
+// Interface for EGL contexts. Adds an EGL specific accessor for retreiving
+// the surface.
+class BaseEGLContext : public GLContext {
+ public:
+  BaseEGLContext() {}
+  virtual ~BaseEGLContext() {}
+
+  // Implement GLContext.
+  virtual EGLSurface GetSurface() = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(BaseEGLContext);
+};
+
+// Encapsulates an EGL OpenGL ES context that renders to a view.
+class NativeViewEGLContext : public BaseEGLContext {
+ public:
+  explicit NativeViewEGLContext(void* window);
+  virtual ~NativeViewEGLContext();
+
+  // Initialize an EGL context.
+  bool Initialize();
+
+  // Implement GLContext.
+  virtual void Destroy();
+  virtual bool MakeCurrent();
+  virtual bool IsCurrent();
+  virtual bool IsOffscreen();
+  virtual void SwapBuffers();
+  virtual gfx::Size GetSize();
+  virtual void* GetHandle();
+
+  // Implement BaseEGLContext.
+  virtual EGLSurface GetSurface();
+
+ private:
+  void* window_;
+  EGLSurface surface_;
+  EGLContext context_;
+
+  DISALLOW_COPY_AND_ASSIGN(NativeViewEGLContext);
+};
+
+// Encapsulates an EGL OpenGL ES context intended for offscreen use. It is
+// actually associated with a native window and will render to it. The caller
+// must bind an FBO to prevent this. Not using pbuffers because ANGLE does not
+// support them.
+class SecondaryEGLContext : public BaseEGLContext {
+ public:
+  SecondaryEGLContext();
+  virtual ~SecondaryEGLContext();
+
+  // Initialize an EGL context that shares a namespace with another.
+  bool Initialize(GLContext* shared_context);
+
+  // Implement GLContext.
+  virtual void Destroy();
+  virtual bool MakeCurrent();
+  virtual bool IsCurrent();
+  virtual bool IsOffscreen();
+  virtual void SwapBuffers();
+  virtual gfx::Size GetSize();
+  virtual void* GetHandle();
+
+  // Implement BaseEGLContext.
+  virtual EGLSurface GetSurface();
+
+ private:
+  // All offscreen
+  EGLSurface surface_;
+  EGLContext context_;
+
+  DISALLOW_COPY_AND_ASSIGN(SecondaryEGLContext);
+};
+
+}  // namespace gfx
+
+#endif  // APP_GFX_GL_GL_CONTEXT_EGL_H_