text: // 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_SURFACE_GLX_H_
  #define UI_GL_GL_SURFACE_GLX_H_
  
  #include <string>
  
  #include "base/compiler_specific.h"
  #include "ui/base/x/x11_util.h"
  #include "ui/gfx/native_widget_types.h"
  #include "ui/gfx/size.h"
  #include "ui/gl/gl_export.h"
  #include "ui/gl/gl_surface.h"
  #include "ui/gl/vsync_provider.h"
  
  namespace gfx {
  
  // Base class for GLX surfaces.
  class GL_EXPORT GLSurfaceGLX : public GLSurface {
   public:
    GLSurfaceGLX();
  
    static bool InitializeOneOff();
  
    // These aren't particularly tied to surfaces, but since we already
    // have the static InitializeOneOff here, it's easiest to reuse its
    // initialization guards.
    static const char* GetGLXExtensions();
    static bool HasGLXExtension(const char* name);
    static bool IsCreateContextSupported();
    static bool IsCreateContextRobustnessSupported();
    static bool IsTextureFromPixmapSupported();
    static bool IsOMLSyncControlSupported();
  
    virtual void* GetDisplay() OVERRIDE;
  
    // Get the FB config that the surface was created with or NULL if it is not
    // a GLX drawable.
    virtual void* GetConfig() = 0;
  
   protected:
    virtual ~GLSurfaceGLX();
  
   private:
    DISALLOW_COPY_AND_ASSIGN(GLSurfaceGLX);
  };
  
  // A surface used to render to a view.
  class GL_EXPORT NativeViewGLSurfaceGLX : public GLSurfaceGLX {
   public:
    explicit NativeViewGLSurfaceGLX(gfx::AcceleratedWidget window);
  
    // Implement GLSurfaceGLX.
    virtual bool Initialize() OVERRIDE;
    virtual void Destroy() OVERRIDE;
    virtual bool Resize(const gfx::Size& size) OVERRIDE;
    virtual bool IsOffscreen() OVERRIDE;
    virtual bool SwapBuffers() OVERRIDE;
    virtual gfx::Size GetSize() OVERRIDE;
    virtual void* GetHandle() OVERRIDE;
    virtual std::string GetExtensions() OVERRIDE;
    virtual void* GetConfig() OVERRIDE;
    virtual bool PostSubBuffer(int x, int y, int width, int height) OVERRIDE;
    virtual VSyncProvider* GetVSyncProvider() OVERRIDE;
  
   protected:
    NativeViewGLSurfaceGLX();
    virtual ~NativeViewGLSurfaceGLX();
  
    gfx::AcceleratedWidget window_;
  
   private:
    void* config_;
    gfx::Size size_;
  
    scoped_ptr<VSyncProvider> vsync_provider_;
  
    DISALLOW_COPY_AND_ASSIGN(NativeViewGLSurfaceGLX);
  };
  
  // A surface used to render to an offscreen pbuffer.
  class GL_EXPORT PbufferGLSurfaceGLX : public GLSurfaceGLX {
   public:
    explicit PbufferGLSurfaceGLX(const gfx::Size& size);
  
    // Implement GLSurfaceGLX.
    virtual bool Initialize() OVERRIDE;
    virtual void Destroy() OVERRIDE;
    virtual bool IsOffscreen() OVERRIDE;
    virtual bool SwapBuffers() OVERRIDE;
    virtual gfx::Size GetSize() OVERRIDE;
    virtual void* GetHandle() OVERRIDE;
    virtual void* GetConfig() OVERRIDE;
  
   protected:
    virtual ~PbufferGLSurfaceGLX();
  
   private:
    gfx::Size size_;
    void* config_;
    XID pbuffer_;
  
    DISALLOW_COPY_AND_ASSIGN(PbufferGLSurfaceGLX);
  };
  
  }  // namespace gfx
  
  #endif  // UI_GL_GL_SURFACE_GLX_H_
  