Vishnu Nair | 16efdbf | 2019-12-10 11:55:42 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2019 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 <math/vec4.h> |
| 20 | #include <ui/Rect.h> |
| 21 | |
| 22 | #include "GLSkiaShadowPort.h" |
| 23 | |
| 24 | namespace android { |
| 25 | namespace renderengine { |
| 26 | |
| 27 | class Mesh; |
| 28 | |
| 29 | namespace gl { |
| 30 | |
| 31 | /** |
| 32 | * Generates gl attributes required to draw shadow spot and/or ambient shadows. |
| 33 | * |
| 34 | * Each shadow can support different colors. This class generates three vertex attributes for |
| 35 | * each shadow, its position, color and shadow params(offset and distance). These can be sent |
| 36 | * using a single glDrawElements call. |
| 37 | */ |
| 38 | class GLShadowVertexGenerator { |
| 39 | public: |
| 40 | GLShadowVertexGenerator(const FloatRect& casterRect, float casterCornerRadius, float casterZ, |
| 41 | bool casterIsTranslucent, const vec4& ambientColor, |
| 42 | const vec4& spotColor, const vec3& lightPosition, float lightRadius); |
| 43 | ~GLShadowVertexGenerator() = default; |
| 44 | |
| 45 | size_t getVertexCount() const; |
| 46 | size_t getIndexCount() const; |
| 47 | void fillVertices(Mesh::VertexArray<vec2>& position, Mesh::VertexArray<vec4>& color, |
| 48 | Mesh::VertexArray<vec3>& params) const; |
| 49 | void fillIndices(uint16_t* indices) const; |
| 50 | |
| 51 | private: |
| 52 | bool mDrawAmbientShadow; |
| 53 | std::unique_ptr<Geometry> mAmbientShadowGeometry; |
| 54 | int mAmbientShadowVertexCount = 0; |
| 55 | int mAmbientShadowIndexCount = 0; |
| 56 | |
| 57 | bool mDrawSpotShadow; |
| 58 | std::unique_ptr<Geometry> mSpotShadowGeometry; |
| 59 | int mSpotShadowVertexCount = 0; |
| 60 | int mSpotShadowIndexCount = 0; |
| 61 | }; |
| 62 | |
| 63 | } // namespace gl |
| 64 | } // namespace renderengine |
| 65 | } // namespace android |