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// Copyright (c) 2011 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_GFX_COMPOSITOR_COMPOSITOR_GL_H_
#define UI_GFX_COMPOSITOR_COMPOSITOR_GL_H_
#pragma once
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/singleton.h"
#include "base/memory/ref_counted.h"
#include "ui/gfx/compositor/compositor.h"
#include "ui/gfx/size.h"
namespace gfx {
class GLContext;
class GLSurface;
class Rect;
}
namespace ui {
class CompositorGL;
class TextureProgramGL;
// We share resources (such as shaders) between different Compositors via
// GLContext sharing so that we only have to create/destroy them once.
class COMPOSITOR_EXPORT SharedResources {
public:
static SharedResources* GetInstance();
bool MakeSharedContextCurrent();
// Creates a context that shares the resources hosted by this singleton.
scoped_refptr<gfx::GLContext> CreateContext(gfx::GLSurface* surface);
ui::TextureProgramGL* program_no_swizzle() {
return program_no_swizzle_.get();
}
ui::TextureProgramGL* program_swizzle() {
return program_swizzle_.get();
}
private:
friend struct DefaultSingletonTraits<SharedResources>;
SharedResources();
virtual ~SharedResources();
bool Initialize();
void Destroy();
bool initialized_;
scoped_refptr<gfx::GLContext> context_;
scoped_refptr<gfx::GLSurface> surface_;
scoped_ptr<ui::TextureProgramGL> program_swizzle_;
scoped_ptr<ui::TextureProgramGL> program_no_swizzle_;
DISALLOW_COPY_AND_ASSIGN(SharedResources);
};
class COMPOSITOR_EXPORT TextureGL : public Texture {
public:
TextureGL();
virtual void SetCanvas(const SkCanvas& canvas,
const gfx::Point& origin,
const gfx::Size& overall_size) OVERRIDE;
virtual void Draw(const ui::TextureDrawParams& params,
const gfx::Rect& clip_bounds_in_texture) OVERRIDE;
protected:
explicit TextureGL(const gfx::Size& size);
virtual ~TextureGL();
// Actually draws the texture.
// Only the region defined by draw_bounds will be drawn.
void DrawInternal(const TextureProgramGL& program,
const ui::TextureDrawParams& params,
const gfx::Rect& clip_bounds_in_texture);
unsigned int texture_id_;
gfx::Size size_;
private:
DISALLOW_COPY_AND_ASSIGN(TextureGL);
};
class COMPOSITOR_EXPORT CompositorGL : public Compositor {
public:
CompositorGL(gfx::AcceleratedWidget widget, const gfx::Size& size);
virtual ~CompositorGL();
void MakeCurrent();
gfx::Size GetSize();
protected:
virtual void OnWidgetSizeChanged() OVERRIDE;
private:
// Overridden from Compositor.
virtual Texture* CreateTexture() OVERRIDE;
virtual void NotifyStart() OVERRIDE;
virtual void NotifyEnd() OVERRIDE;
virtual void Blur(const gfx::Rect& bounds) OVERRIDE;
virtual void SchedulePaint() OVERRIDE;
// The GL context used for compositing.
scoped_refptr<gfx::GLSurface> gl_surface_;
scoped_refptr<gfx::GLContext> gl_context_;
// Keep track of whether compositing has started or not.
bool started_;
DISALLOW_COPY_AND_ASSIGN(CompositorGL);
};
} // namespace ui
#endif // UI_GFX_COMPOSITOR_COMPOSITOR_GL_H_
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