1 /* 2 * Copyright (c) 2022 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 16 #ifndef GAUSSIAN_BLUR_FILTER_H 17 #define GAUSSIAN_BLUR_FILTER_H 18 19 #include <algorithm> 20 #include "algo_filter.h" 21 #include "horizontal_blur_filter.h" 22 #include "vertical_blur_filter.h" 23 #include "scale_filter.h" 24 25 namespace OHOS { 26 namespace Rosen { 27 class GaussianBlurFilter : public AlgoFilter { 28 public: 29 static constexpr int RADIUS = 3; 30 static constexpr float DOWNSAMPLE_FACTOR = 0.25f; 31 static constexpr float INVERSE_DOWNSAMPLE_FACTOR = 1.0f / DOWNSAMPLE_FACTOR; 32 GaussianBlurFilter(); 33 ~GaussianBlurFilter(); 34 void SetValue(const std::string& key, void* value, int size) override; 35 36 private: 37 std::string GetVertexShader() override; 38 std::string GetFragmentShader() override; 39 void DoProcess(ProcessData& data) override; LoadFilterParams()40 void LoadFilterParams() override {}; 41 ScaleFilter* upSampleFilter_ = nullptr; 42 ScaleFilter* downSampleFilter_ = nullptr; 43 HorizontalBlurFilter* horizontalBlurFilter_ = nullptr; 44 VerticalBlurFilter* verticalBlurFilter_ = nullptr; 45 }; 46 } // namespace Rosen 47 } // namespace OHOS 48 #endif // GAUSSIAN_BLUR_FILTER_H 49 50