blob: 2e59a07876089f3386de425cae934fd6b2d788d0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
// Copyright 2013 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_SCOPED_CANVAS_H_
#define UI_GFX_SCOPED_CANVAS_H_
#include "ui/gfx/canvas.h"
namespace gfx {
// Saves the drawing state, and restores the state when going out of scope.
class ScopedCanvas {
public:
explicit ScopedCanvas(gfx::Canvas* canvas) : canvas_(canvas) {
if (canvas_)
canvas_->Save();
}
~ScopedCanvas() {
if (canvas_)
canvas_->Restore();
}
void SetCanvas(gfx::Canvas* canvas) {
if (canvas_)
canvas_->Restore();
canvas_ = canvas;
canvas_->Save();
}
private:
gfx::Canvas* canvas_;
DISALLOW_COPY_AND_ASSIGN(ScopedCanvas);
};
} // namespace gfx
#endif // UI_GFX_SCOPED_CANVAS_H_
|
