6c2296137e
Added configurable parameters for edge treatment for BlurShader to determine how edge pixels are to be computed as part of the blur kernel. This provides the option to sample the edge pixels of the source for larger windows as well as using transparent (default behavior) Fixes: 167714368 Test: Added CTS tests to verify results of edge treatment parameters Change-Id: I3880ff4aa2e2a4eba831a0aa6d2ec77b07e84813
46 lines
1.5 KiB
C++
46 lines
1.5 KiB
C++
/*
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* Copyright (C) 2020 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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#pragma once
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#include "Shader.h"
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namespace android::uirenderer {
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/**
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* Shader implementation that blurs another Shader instance or the source bitmap
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*/
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class BlurShader : public Shader {
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public:
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/**
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* Creates a BlurShader instance with the provided radius values to blur along the x and y
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* axis accordingly.
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*
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* This will blur the contents of the provided input shader if it is non-null, otherwise
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* the source bitmap will be blurred instead.
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*
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* The edge treatment parameter determines how content near the edges of the source is to
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* participate in the blur
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*/
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BlurShader(float radiusX, float radiusY, Shader* inputShader, SkTileMode edgeTreatment,
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const SkMatrix* matrix);
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~BlurShader() override;
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protected:
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sk_sp<SkImageFilter> makeSkImageFilter() override;
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private:
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sk_sp<SkImageFilter> skImageFilter;
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};
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} // namespace android::uirenderer
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