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 HORIZONTAL_BLUR_FILTER_H
17 #define HORIZONTAL_BLUR_FILTER_H
18 
19 #include "algo_filter.h"
20 
21 namespace OHOS {
22 namespace Rosen {
23 class HorizontalBlurFilter : public AlgoFilter {
24 public:
25     static constexpr int RADIUS = 3;
26     static constexpr float DEFAULT_WEIGHT_ONE = 0.227f;
27     static constexpr float DEFAULT_WEIGHT_TWO = 0.316f;
28     static constexpr float DEFAULT_WEIGHT_THREE = 0.070f;
29     static constexpr float DEFAULT_OFFSET_ONE = 0.0;
30     static constexpr float DEFAULT_OFFSET_TWO = 1.385f;
31     static constexpr float DEFAULT_OFFSET_THREE = 3.231f;
32 
33     HorizontalBlurFilter();
~HorizontalBlurFilter()34     virtual ~HorizontalBlurFilter() {};
35     void SetValue(const std::string& key, std::shared_ptr<void> value, int size) override;
36     std::string GetFragmentShader() override;
37     std::string GetVertexShader() override;
38 
39 private:
40     void LoadFilterParams() override;
41     GLint weightID_ = 0;
42     GLint offsetID_ = 0;
43     float weight_[RADIUS] = {DEFAULT_WEIGHT_ONE, DEFAULT_WEIGHT_TWO, DEFAULT_WEIGHT_THREE};
44     float offset_[RADIUS] = {DEFAULT_OFFSET_ONE, DEFAULT_OFFSET_TWO, DEFAULT_OFFSET_THREE};
45 };
46 } // namespace Rosen
47 } // namespace OHOS
48 #endif // HORIZONTAL_BLUR_FILTER_H
49 
50