1 /* 2 * Copyright (c) 2024 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 #ifndef RENDER_SERVICE_CLIENT_CORE_RENDER_RS_DISTORTION_SHADER_FILTER_H 16 #define RENDER_SERVICE_CLIENT_CORE_RENDER_RS_DISTORTION_SHADER_FILTER_H 17 18 #include "effect/runtime_effect.h" 19 #include "effect/runtime_shader_builder.h" 20 #include "render/rs_skia_filter.h" 21 22 namespace OHOS { 23 namespace Rosen { 24 class RSB_EXPORT RSDistortionFilter : public RSDrawingFilterOriginal { 25 public: 26 RSDistortionFilter(float distortionK); 27 RSDistortionFilter(const RSDistortionFilter&) = delete; 28 RSDistortionFilter operator=(const RSDistortionFilter&) = delete; 29 ~RSDistortionFilter() override; 30 31 bool IsValid() const override; 32 std::string GetDescription() override; 33 void DrawImageRect(Drawing::Canvas& canvas, const std::shared_ptr<Drawing::Image>& image, 34 const Drawing::Rect& src, const Drawing::Rect& dst) const override; PreProcess(std::shared_ptr<Drawing::Image> image)35 void PreProcess(std::shared_ptr<Drawing::Image> image) override {}; PostProcess(Drawing::Canvas & canvas)36 void PostProcess(Drawing::Canvas& canvas) override {}; Compose(const std::shared_ptr<RSDrawingFilterOriginal> & other)37 std::shared_ptr<RSDrawingFilterOriginal> Compose( 38 const std::shared_ptr<RSDrawingFilterOriginal>& other) const override 39 { 40 return nullptr; 41 } 42 43 private: 44 float distortionK_ = 0.0f; 45 float scaleCoord_ = 1.0f; 46 float offsetX_ = 0.0f; 47 float offsetY_ = 0.0f; 48 49 static std::shared_ptr<Drawing::RuntimeShaderBuilder> MakeDistortionShader(); 50 void DrawDistortion(Drawing::Canvas& canvas, const std::shared_ptr<Drawing::Image>& image, 51 const Drawing::Rect& src, const Drawing::Rect& dst) const; 52 53 friend class RSMarshallingHelper; 54 }; 55 } // namespace Rosen 56 } // namespace OHOS 57 58 #endif // RENDER_SERVICE_CLIENT_CORE_RENDER_RS_DISTORTION_SHADER_FILTER_H