1 /*
2  * Copyright 2021 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 
19 #include "BlurFilter.h"
20 #include <SkCanvas.h>
21 #include <SkImage.h>
22 #include <SkRuntimeEffect.h>
23 #include <SkSurface.h>
24 
25 using namespace std;
26 
27 namespace android {
28 namespace renderengine {
29 namespace skia {
30 
31 /**
32  * This is an implementation of a Gaussian blur using Skia's built-in GaussianBlur filter.
33  */
34 class GaussianBlurFilter: public BlurFilter {
35 public:
36     explicit GaussianBlurFilter();
~GaussianBlurFilter()37     virtual ~GaussianBlurFilter(){}
38 
39     // Execute blur, saving it to a texture
40     sk_sp<SkImage> generate(SkiaGpuContext* context, const uint32_t radius,
41                             const sk_sp<SkImage> blurInput, const SkRect& blurRect) const override;
42 };
43 
44 } // namespace skia
45 } // namespace renderengine
46 } // namespace android
47