3fedf5a7e2
Test: compiles and links Bug: 150782769 Change-Id: Ib49c1bf914b6bfaad1fb29371115df7c9eec08d2
48 lines
1.8 KiB
C++
48 lines
1.8 KiB
C++
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_HWUI_BLUR_H
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#define ANDROID_HWUI_BLUR_H
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#include <cutils/compiler.h>
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#include <stdint.h>
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namespace android {
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namespace uirenderer {
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class Blur {
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public:
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// If radius > 0, return the corresponding sigma, else return 0
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static float convertRadiusToSigma(float radius);
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// If sigma > 0.5, return the corresponding radius, else return 0
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static float convertSigmaToRadius(float sigma);
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// If the original radius was on an integer boundary then after the sigma to
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// radius conversion a small rounding error may be introduced. This function
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// accounts for that error and snaps to the appropriate integer boundary.
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static uint32_t convertRadiusToInt(float radius);
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static void generateGaussianWeights(float* weights, float radius);
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static void horizontal(float* weights, int32_t radius, const uint8_t* source, uint8_t* dest,
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int32_t width, int32_t height);
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static void vertical(float* weights, int32_t radius, const uint8_t* source, uint8_t* dest,
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int32_t width, int32_t height);
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};
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} // namespace uirenderer
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} // namespace android
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#endif // ANDROID_HWUI_BLUR_H
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