1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef SKIA_EXT_OPACITY_DRAW_FILTER_H 6 #define SKIA_EXT_OPACITY_DRAW_FILTER_H 7 8 #include "base/values.h" 9 #include "third_party/skia/include/core/SkDrawFilter.h" 10 11 class SkPaint; 12 13 namespace skia { 14 15 // This filter allows setting an opacity on every draw call to a canvas, and to 16 // disable image filtering. Note that the opacity setting is only correct in 17 // very limited conditions: when there is only zero or one opaque, nonlayer 18 // draw for every pixel in the surface. 19 class SK_API OpacityDrawFilter : public SkDrawFilter { 20 public: 21 OpacityDrawFilter(float opacity, bool disable_image_filtering); 22 virtual ~OpacityDrawFilter(); 23 virtual bool filter(SkPaint* paint, SkDrawFilter::Type type) OVERRIDE; 24 25 private: 26 int alpha_; 27 bool disable_image_filtering_; 28 }; 29 30 } // namespace skia 31 32 #endif // SKIA_EXT_OPACITY_DRAW_FILTER_H 33 34
