| // 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 <stdint.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. |size_in_context| is the size in the |context|'s space surrounding |
| // everything that's visible. |lcd_text_requires_opaque_layer| should |
| // normally be true; if this is false, Skia will respect text rendering |
| // requests for LCD AA even if they occur on non-opaque layers. This should |
| // only be used in cases where the text is known to be rendered opaquely on an |
| // opaque background before compositing. |
| CompositingRecorder(const PaintContext& context, |
| uint8_t alpha, |
| bool lcd_text_requires_opaque_layer); |
| ~CompositingRecorder(); |
| |
| private: |
| const PaintContext& context_; |
| bool saved_; |
| |
| DISALLOW_COPY_AND_ASSIGN(CompositingRecorder); |
| }; |
| |
| } // namespace ui |
| |
| #endif // UI_COMPOSITOR_CLIP_TRANSFORM_RECORDER_H_ |