ui/gl/gl_surface_osmesa.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef UI_GL_GL_SURFACE_OSMESA_H_
   6 #define UI_GL_GL_SURFACE_OSMESA_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "ui/gfx/size.h"
  10 #include "ui/gl/gl_surface.h"
  11
  12 namespace gfx {
  13
  14 // A surface that the Mesa software renderer draws to. This is actually just a
  15 // buffer in system memory. GetHandle returns a pointer to the buffer. These
  16 // surfaces can be resized and resizing preserves the contents.
  17 class GL_EXPORT GLSurfaceOSMesa : public GLSurface {
  18  public:
  19   GLSurfaceOSMesa(unsigned format, const gfx::Size& size);
  20
  21   // Implement GLSurface.
  22   virtual bool Initialize() OVERRIDE;
  23   virtual void Destroy() OVERRIDE;
  24   virtual bool Resize(const gfx::Size& new_size) OVERRIDE;
  25   virtual bool IsOffscreen() OVERRIDE;
  26   virtual bool SwapBuffers() OVERRIDE;
  27   virtual gfx::Size GetSize() OVERRIDE;
  28   virtual void* GetHandle() OVERRIDE;
  29   virtual unsigned GetFormat() OVERRIDE;
  30
  31  protected:
  32   virtual ~GLSurfaceOSMesa();
  33
  34  private:
  35   unsigned format_;
  36   gfx::Size size_;
  37   scoped_ptr<int32[]> buffer_;
  38
  39   DISALLOW_COPY_AND_ASSIGN(GLSurfaceOSMesa);
  40 };
  41
  42 // A thin subclass of |GLSurfaceOSMesa| that can be used in place
  43 // of a native hardware-provided surface when a native surface
  44 // provider is not available.
  45 class GLSurfaceOSMesaHeadless : public GLSurfaceOSMesa {
  46  public:
  47   explicit GLSurfaceOSMesaHeadless();
  48
  49   virtual bool IsOffscreen() OVERRIDE;
  50   virtual bool SwapBuffers() OVERRIDE;
  51
  52  protected:
  53   virtual ~GLSurfaceOSMesaHeadless();
  54
  55  private:
  56   DISALLOW_COPY_AND_ASSIGN(GLSurfaceOSMesaHeadless);
  57 };
  58
  59 }  // namespace gfx
  60
  61 #endif  // UI_GL_GL_SURFACE_OSMESA_H_