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 enum OSMesaSurfaceFormat { OSMesaSurfaceFormatBGRA, OSMesaSurfaceFormatRGBA }; 15 16 // A surface that the Mesa software renderer draws to. This is actually just a 17 // buffer in system memory. GetHandle returns a pointer to the buffer. These 18 // surfaces can be resized and resizing preserves the contents. 19 class GL_EXPORT GLSurfaceOSMesa : public GLSurface { 20 public: 21 GLSurfaceOSMesa(OSMesaSurfaceFormat format, const gfx::Size& size); 22 23 // Implement GLSurface. 24 virtual bool Initialize() OVERRIDE; 25 virtual void Destroy() OVERRIDE; 26 virtual bool Resize(const gfx::Size& new_size) OVERRIDE; 27 virtual bool IsOffscreen() OVERRIDE; 28 virtual bool SwapBuffers() OVERRIDE; 29 virtual gfx::Size GetSize() OVERRIDE; 30 virtual void* GetHandle() OVERRIDE; 31 virtual unsigned GetFormat() OVERRIDE; 32 33 protected: 34 virtual ~GLSurfaceOSMesa(); 35 36 private: 37 unsigned format_; 38 gfx::Size size_; 39 scoped_ptr<int32[]> buffer_; 40 41 DISALLOW_COPY_AND_ASSIGN(GLSurfaceOSMesa); 42 }; 43 44 // A thin subclass of |GLSurfaceOSMesa| that can be used in place 45 // of a native hardware-provided surface when a native surface 46 // provider is not available. 47 class GLSurfaceOSMesaHeadless : public GLSurfaceOSMesa { 48 public: 49 explicit GLSurfaceOSMesaHeadless(); 50 51 virtual bool IsOffscreen() OVERRIDE; 52 virtual bool SwapBuffers() OVERRIDE; 53 54 protected: 55 virtual ~GLSurfaceOSMesaHeadless(); 56 57 private: 58 DISALLOW_COPY_AND_ASSIGN(GLSurfaceOSMesaHeadless); 59 }; 60 61 } // namespace gfx 62 63 #endif // UI_GL_GL_SURFACE_OSMESA_H_ 64
