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 float DOWNSAMPLE_FACTOR = 0.25f;
30     static constexpr float INVERSE_DOWNSAMPLE_FACTOR = 1.0f / DOWNSAMPLE_FACTOR;
31     GaussianBlurFilter();
32     virtual ~GaussianBlurFilter();
33     void SetValue(const std::string& key, std::shared_ptr<void> value, int size) override;
34     std::string GetVertexShader() override;
35     std::string GetFragmentShader() override;
36 private:
37     void DoProcess(ProcessData& data) override;
LoadFilterParams()38     void LoadFilterParams() override {}
39     std::unique_ptr<ScaleFilter> upSampleFilter_ = nullptr;
40     std::unique_ptr<ScaleFilter> downSampleFilter_ = nullptr;
41     std::unique_ptr<HorizontalBlurFilter> horizontalBlurFilter_ = nullptr;
42     std::unique_ptr<VerticalBlurFilter> verticalBlurFilter_ = nullptr;
43 };
44 } // namespace Rosen
45 } // namespace OHOS
46 #endif // GAUSSIAN_BLUR_FILTER_H
47 
48