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66 lines
2.1 KiB
66 lines
2.1 KiB
/*
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* Copyright 2019 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 <math/vec4.h>
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#include <ui/Rect.h>
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#include "GLSkiaShadowPort.h"
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namespace android {
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namespace renderengine {
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class Mesh;
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namespace gl {
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/**
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* Generates gl attributes required to draw shadow spot and/or ambient shadows.
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*
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* Each shadow can support different colors. This class generates three vertex attributes for
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* each shadow, its position, color and shadow params(offset and distance). These can be sent
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* using a single glDrawElements call.
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*/
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class GLShadowVertexGenerator {
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public:
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GLShadowVertexGenerator(const FloatRect& casterRect, float casterCornerRadius, float casterZ,
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bool casterIsTranslucent, const vec4& ambientColor,
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const vec4& spotColor, const vec3& lightPosition, float lightRadius);
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~GLShadowVertexGenerator() = default;
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size_t getVertexCount() const;
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size_t getIndexCount() const;
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void fillVertices(Mesh::VertexArray<vec2>& position, Mesh::VertexArray<vec4>& color,
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Mesh::VertexArray<vec3>& params) const;
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void fillIndices(uint16_t* indices) const;
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private:
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bool mDrawAmbientShadow;
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std::unique_ptr<Geometry> mAmbientShadowGeometry;
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int mAmbientShadowVertexCount = 0;
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int mAmbientShadowIndexCount = 0;
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bool mDrawSpotShadow;
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std::unique_ptr<Geometry> mSpotShadowGeometry;
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int mSpotShadowVertexCount = 0;
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int mSpotShadowIndexCount = 0;
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};
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} // namespace gl
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} // namespace renderengine
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} // namespace android
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