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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_SCOPED_MAKE_CURRENT_H_
#define UI_GL_SCOPED_MAKE_CURRENT_H_
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/optional.h"
#include "ui/gl/gl_export.h"
namespace gl {
class GLContext;
class GLSurface;
}
namespace ui {
// ScopedMakeCurrent makes given context current with the given surface. If this
// fails, Succeeded() returns false. It also restores the previous context on
// destruction and asserts that this succeeds. Users can optionally use
// Restore() to check if restoring the previous context succeeds. This prevents
// the assert during destruction.
class GL_EXPORT ScopedMakeCurrent {
public:
ScopedMakeCurrent(gl::GLContext* context, gl::GLSurface* surface);
~ScopedMakeCurrent();
// Returns whether the |context_| is current.
bool IsContextCurrent() { return is_context_current_; }
private:
scoped_refptr<gl::GLContext> previous_context_;
scoped_refptr<gl::GLSurface> previous_surface_;
scoped_refptr<gl::GLContext> context_;
scoped_refptr<gl::GLSurface> surface_;
bool is_context_current_ = false;
DISALLOW_COPY_AND_ASSIGN(ScopedMakeCurrent);
};
} // namespace ui
#endif // UI_GL_SCOPED_MAKE_CURRENT_H_
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