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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 <stdint.h>
#include <memory>
#include "base/macros.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gl/gl_export.h"
#include "ui/gl/gl_surface.h"
namespace gl {
// 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(GLSurfaceFormat format, const gfx::Size& size);
// Implement GLSurface.
bool Initialize(GLSurfaceFormat format) override;
void Destroy() override;
bool Resize(const gfx::Size& new_size,
float scale_factor,
ColorSpace color_space,
bool has_alpha) override;
bool IsOffscreen() override;
gfx::SwapResult SwapBuffers(const PresentationCallback& callback) override;
gfx::Size GetSize() override;
void* GetHandle() override;
GLSurfaceFormat GetFormat() override;
protected:
~GLSurfaceOSMesa() override;
private:
gfx::Size size_;
GLSurfaceFormat format_;
std::unique_ptr<int32_t[]> 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 GL_EXPORT GLSurfaceOSMesaHeadless : public GLSurfaceOSMesa {
public:
GLSurfaceOSMesaHeadless();
// GLSurfaceOSMesa overrides:
bool IsOffscreen() override;
gfx::SwapResult SwapBuffers(const PresentationCallback& callback) override;
bool SupportsPresentationCallback() override;
protected:
~GLSurfaceOSMesaHeadless() override;
private:
DISALLOW_COPY_AND_ASSIGN(GLSurfaceOSMesaHeadless);
};
} // namespace gl
#endif // UI_GL_GL_SURFACE_OSMESA_H_
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