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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_API_IMPLEMENTATION_H_
#define UI_GL_GL_API_IMPLEMENTATION_H_
#include "base/compiler_specific.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_export.h"
namespace gpu {
namespace gles2 {
class GLES2Decoder;
}
}
namespace gfx {
class GLContext;
class GLSurface;
void InitializeGLBindingsGL();
void InitializeGLExtensionBindingsGL(GLContext* context);
void InitializeDebugGLBindingsGL();
void ClearGLBindingsGL();
void SetGLToRealGLApi();
void SetGLApi(GLApi* api);
class GL_EXPORT GLApiBase : public GLApi {
public:
// Include the auto-generated part of this class. We split this because
// it means we can easily edit the non-auto generated parts right here in
// this file instead of having to edit some template or the code generator.
#include "gl_bindings_api_autogen_gl.h"
protected:
GLApiBase();
virtual ~GLApiBase();
void InitializeBase(DriverGL* driver);
DriverGL* driver_;
};
// Implemenents the GL API by calling directly into the driver.
class GL_EXPORT RealGLApi : public GLApiBase {
public:
RealGLApi();
virtual ~RealGLApi();
void Initialize(DriverGL* driver);
};
// Inserts a TRACE for every GL call.
class GL_EXPORT TraceGLApi : public GLApi {
public:
TraceGLApi(GLApi* gl_api) : gl_api_(gl_api) { }
virtual ~TraceGLApi();
// Include the auto-generated part of this class. We split this because
// it means we can easily edit the non-auto generated parts right here in
// this file instead of having to edit some template or the code generator.
#include "gl_bindings_api_autogen_gl.h"
private:
GLApi* gl_api_;
};
// Implementents the GL API using co-operative state restoring.
// Assumes there is only one real GL context and that multiple virtual contexts
// are implemented above it. Restores the needed state from the current context.
class GL_EXPORT VirtualGLApi : public GLApiBase {
public:
VirtualGLApi();
virtual ~VirtualGLApi();
void Initialize(DriverGL* driver, GLContext* real_context);
// Sets the current virutal context.
bool MakeCurrent(GLContext* virtual_context, GLSurface* surface);
void OnReleaseVirtuallyCurrent(GLContext* virtual_context);
// Overridden functions from GLApiBase
virtual const GLubyte* glGetStringFn(GLenum name) OVERRIDE;
private:
// The real context we're running on.
GLContext* real_context_;
// The current virtual context.
GLContext* current_context_;
// The supported extensions being advertised for this virtual context.
std::string extensions_;
};
} // namespace gfx
#endif // UI_GL_GL_API_IMPLEMENTATION_H_
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