1 /* 2 * Copyright (C) 2020 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 #include "Shader.h" 19 20 namespace android::uirenderer { 21 22 /** 23 * Shader implementation that blurs another Shader instance or the source bitmap 24 */ 25 class BlurShader : public Shader { 26 public: 27 /** 28 * Creates a BlurShader instance with the provided radius values to blur along the x and y 29 * axis accordingly. 30 * 31 * This will blur the contents of the provided input shader if it is non-null, otherwise 32 * the source bitmap will be blurred instead. 33 * 34 * The edge treatment parameter determines how content near the edges of the source is to 35 * participate in the blur 36 */ 37 BlurShader(float radiusX, float radiusY, Shader* inputShader, SkTileMode edgeTreatment, 38 const SkMatrix* matrix); 39 ~BlurShader() override; 40 protected: 41 sk_sp<SkImageFilter> makeSkImageFilter() override; 42 private: 43 sk_sp<SkImageFilter> skImageFilter; 44 }; 45 46 } // namespace android::uirenderer