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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GL_GL_SHARE_GROUP_H_
#define UI_GL_GL_SHARE_GROUP_H_
#include <set>
#include "base/memory/raw_ptr.h"
#include "base/memory/ref_counted.h"
#include "build/build_config.h"
#include "ui/gl/gl_export.h"
namespace gl {
class GLContext;
// A group of GL contexts that share an ID namespace.
class GL_EXPORT GLShareGroup : public base::RefCounted<GLShareGroup> {
public:
GLShareGroup();
GLShareGroup(const GLShareGroup&) = delete;
GLShareGroup& operator=(const GLShareGroup&) = delete;
// These two should only be called from the constructor and destructor of
// GLContext.
void AddContext(GLContext* context);
void RemoveContext(GLContext* context);
// Returns a handle to any initialized context in the share group or NULL if
// there are no initialized contexts in the share group.
void* GetHandle();
// Returns a pointer to any initialized context in the share group
// or NULL if there are no initialized contexts in the share group.
GLContext* GetContext();
// Sets and returns the shared GL context. Used for context virtualization.
void SetSharedContext(GLContext* context);
GLContext* shared_context() { return shared_context_; }
private:
friend class base::RefCounted<GLShareGroup>;
~GLShareGroup();
// References to GLContext are by raw pointer to avoid a reference count
// cycle.
typedef std::set<raw_ptr<GLContext, SetExperimental>> ContextSet;
ContextSet contexts_;
raw_ptr<GLContext> shared_context_ = nullptr;
};
} // namespace gl
#endif // UI_GL_GL_SHARE_GROUP_H_
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