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// 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/geometry/size.h"
#include "ui/gl/gl_surface.h"
namespace gfx {
enum OSMesaSurfaceFormat { OSMesaSurfaceFormatBGRA, OSMesaSurfaceFormatRGBA };
// 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(OSMesaSurfaceFormat format, const gfx::Size& size);
// Implement GLSurface.
bool Initialize() override;
void Destroy() override;
bool Resize(const gfx::Size& new_size) override;
bool IsOffscreen() override;
gfx::SwapResult SwapBuffers() override;
gfx::Size GetSize() override;
void* GetHandle() override;
unsigned GetFormat() override;
protected:
~GLSurfaceOSMesa() override;
private:
unsigned format_;
gfx::Size size_;
scoped_ptr<int32[]> buffer_;
DISALLOW_COPY_AND_ASSIGN(GLSurfaceOSMesa);
};
// A thin subclass of |GLSurfaceOSMesa| that can be used in place
// of a native hardware-provided surface when a native surface
// provider is not available.
class GLSurfaceOSMesaHeadless : public GLSurfaceOSMesa {
public:
explicit GLSurfaceOSMesaHeadless();
bool IsOffscreen() override;
gfx::SwapResult SwapBuffers() override;
protected:
~GLSurfaceOSMesaHeadless() override;
private:
DISALLOW_COPY_AND_ASSIGN(GLSurfaceOSMesaHeadless);
};
} // namespace gfx
#endif // UI_GL_GL_SURFACE_OSMESA_H_
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