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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_GFX_WIN_SCOPED_SET_MAP_MODE_H_
#define UI_GFX_WIN_SCOPED_SET_MAP_MODE_H_
#include <windows.h>
#include "base/logging.h"
#include "base/macros.h"
namespace gfx {
// Helper class for setting and restore the map mode on a DC.
class ScopedSetMapMode {
public:
ScopedSetMapMode(HDC hdc, int map_mode)
: hdc_(hdc),
old_map_mode_(SetMapMode(hdc, map_mode)) {
DCHECK(hdc_);
DCHECK_NE(map_mode, 0);
DCHECK_NE(old_map_mode_, 0);
}
~ScopedSetMapMode() {
const int mode = SetMapMode(hdc_, old_map_mode_);
DCHECK_NE(mode, 0);
}
private:
HDC hdc_;
int old_map_mode_;
DISALLOW_COPY_AND_ASSIGN(ScopedSetMapMode);
};
} // namespace gfx
#endif // UI_GFX_WIN_SCOPED_SET_MAP_MODE_H_
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