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_OSMESA_H_
  #define UI_GL_GL_SURFACE_OSMESA_H_
  
  #include "base/memory/scoped_ptr.h"
  #include "ui/gfx/size.h"
  #include "ui/gl/gl_surface.h"
  
  namespace gfx {
  
  // A surface that the Mesa software renderer draws to. This is actually just a
  // buffer in system memory. GetHandle returns a pointer to the buffer. These
  // surfaces can be resized and resizing preserves the contents.
  class GL_EXPORT GLSurfaceOSMesa : public GLSurface {
   public:
    GLSurfaceOSMesa(unsigned format, const gfx::Size& size);
  
    // Implement GLSurface.
    virtual bool Initialize() OVERRIDE;
    virtual void Destroy() OVERRIDE;
    virtual bool Resize(const gfx::Size& new_size) OVERRIDE;
    virtual bool IsOffscreen() OVERRIDE;
    virtual bool SwapBuffers() OVERRIDE;
    virtual gfx::Size GetSize() OVERRIDE;
    virtual void* GetHandle() OVERRIDE;
    virtual unsigned GetFormat() OVERRIDE;
  
   protected:
    virtual ~GLSurfaceOSMesa();
  
   private:
    unsigned format_;
    gfx::Size size_;
    scoped_ptr<int32[]> buffer_;
  
    DISALLOW_COPY_AND_ASSIGN(GLSurfaceOSMesa);
  };
  
  }  // namespace gfx
  
  #endif  // UI_GL_GL_SURFACE_OSMESA_H_
  