| // 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 SKIA_EXT_OPACITY_FILTER_CANVAS_H |
| #define SKIA_EXT_OPACITY_FILTER_CANVAS_H |
| |
| #include "third_party/skia/include/utils/SkPaintFilterCanvas.h" |
| |
| namespace skia { |
| |
| // This filter canvas allows setting an opacity on every draw call to a canvas, |
| // and to disable image filtering. Note that the opacity setting is only |
| // correct in very limited conditions: when there is only zero or one opaque, |
| // nonlayer draw for every pixel in the surface. |
| class SK_API OpacityFilterCanvas : public SkPaintFilterCanvas { |
| public: |
| OpacityFilterCanvas(SkCanvas* canvas, |
| float opacity, |
| bool disable_image_filtering); |
| |
| protected: |
| bool onFilter(SkPaint& paint) const override; |
| |
| void onDrawPicture(const SkPicture* picture, |
| const SkMatrix* matrix, |
| const SkPaint* paint) override; |
| |
| private: |
| typedef SkPaintFilterCanvas INHERITED; |
| |
| int alpha_; |
| bool disable_image_filtering_; |
| }; |
| |
| } // namespace skia |
| |
| #endif // SKIA_EXT_OPACITY_FILTER_CANVAS_H |