blob: 729ddb9d5816f62a0972158e683eade9a42f2c86 (
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
|
// Copyright 2015 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_COMPOSITOR_COMPOSITING_RECORDER_H_
#define UI_COMPOSITOR_COMPOSITING_RECORDER_H_
#include "base/basictypes.h"
#include "base/macros.h"
#include "ui/compositor/compositor_export.h"
namespace ui {
class PaintContext;
// A class to provide scoped compositing filters (eg opacity) of painting to a
// DisplayItemList. The filters provided will be applied to any
// DisplayItems added to the DisplayItemList while this object is alive. In
// other words, any nested PaintRecorders or other such Recorders will
// be filtered by the effect.
class COMPOSITOR_EXPORT CompositingRecorder {
public:
// |alpha| is a value between 0 and 255, where 0 is transparent and 255 is
// opaque.
CompositingRecorder(const PaintContext& context, uint8_t alpha);
~CompositingRecorder();
private:
const PaintContext& context_;
bool saved_;
DISALLOW_COPY_AND_ASSIGN(CompositingRecorder);
};
} // namespace ui
#endif // UI_COMPOSITOR_CLIP_TRANSFORM_RECORDER_H_
|
