| 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 | #include <renderengine/Mesh.h> |
| 18 | |
| 19 | #include <math/vec4.h> |
| 20 | |
| 21 | #include <ui/Rect.h> |
| 22 | #include <ui/Transform.h> |
| 23 | |
| 24 | #include "GLShadowVertexGenerator.h" |
| 25 | |
| 26 | namespace android { |
| 27 | namespace renderengine { |
| 28 | namespace gl { |
| 29 | |
| 30 | GLShadowVertexGenerator::GLShadowVertexGenerator(const FloatRect& casterRect, |
| 31 | float casterCornerRadius, float casterZ, |
| 32 | bool casterIsTranslucent, const vec4& ambientColor, |
| 33 | const vec4& spotColor, const vec3& lightPosition, |
| 34 | float lightRadius) { |
| 35 | mDrawAmbientShadow = ambientColor.a > 0.f; |
| 36 | mDrawSpotShadow = spotColor.a > 0.f; |
| 37 | |
| 38 | // Generate geometries and find number of vertices to generate |
| 39 | if (mDrawAmbientShadow) { |
| 40 | mAmbientShadowGeometry = getAmbientShadowGeometry(casterRect, casterCornerRadius, casterZ, |
| 41 | casterIsTranslucent, ambientColor); |
| 42 | mAmbientShadowVertexCount = getVertexCountForGeometry(*mAmbientShadowGeometry.get()); |
| 43 | mAmbientShadowIndexCount = getIndexCountForGeometry(*mAmbientShadowGeometry.get()); |
| 44 | } else { |
| 45 | mAmbientShadowVertexCount = 0; |
| 46 | mAmbientShadowIndexCount = 0; |
| 47 | } |
| 48 | |
| 49 | if (mDrawSpotShadow) { |
| 50 | mSpotShadowGeometry = |
| 51 | getSpotShadowGeometry(casterRect, casterCornerRadius, casterZ, casterIsTranslucent, |
| 52 | spotColor, lightPosition, lightRadius); |
| 53 | mSpotShadowVertexCount = getVertexCountForGeometry(*mSpotShadowGeometry.get()); |
| 54 | mSpotShadowIndexCount = getIndexCountForGeometry(*mSpotShadowGeometry.get()); |
| 55 | } else { |
| 56 | mSpotShadowVertexCount = 0; |
| 57 | mSpotShadowIndexCount = 0; |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | size_t GLShadowVertexGenerator::getVertexCount() const { |
| 62 | return mAmbientShadowVertexCount + mSpotShadowVertexCount; |
| 63 | } |
| 64 | |
| 65 | size_t GLShadowVertexGenerator::getIndexCount() const { |
| 66 | return mAmbientShadowIndexCount + mSpotShadowIndexCount; |
| 67 | } |
| 68 | |
| 69 | void GLShadowVertexGenerator::fillVertices(Mesh::VertexArray<vec2>& position, |
| 70 | Mesh::VertexArray<vec4>& color, |
| 71 | Mesh::VertexArray<vec3>& params) const { |
| 72 | if (mDrawAmbientShadow) { |
| 73 | fillVerticesForGeometry(*mAmbientShadowGeometry.get(), mAmbientShadowVertexCount, position, |
| 74 | color, params); |
| 75 | } |
| 76 | if (mDrawSpotShadow) { |
| 77 | fillVerticesForGeometry(*mSpotShadowGeometry.get(), mSpotShadowVertexCount, |
| 78 | Mesh::VertexArray<vec2>(position, mAmbientShadowVertexCount), |
| 79 | Mesh::VertexArray<vec4>(color, mAmbientShadowVertexCount), |
| 80 | Mesh::VertexArray<vec3>(params, mAmbientShadowVertexCount)); |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | void GLShadowVertexGenerator::fillIndices(uint16_t* indices) const { |
| 85 | if (mDrawAmbientShadow) { |
| 86 | fillIndicesForGeometry(*mAmbientShadowGeometry.get(), mAmbientShadowIndexCount, |
| 87 | 0 /* starting vertex offset */, indices); |
| 88 | } |
| 89 | if (mDrawSpotShadow) { |
| 90 | fillIndicesForGeometry(*mSpotShadowGeometry.get(), mSpotShadowIndexCount, |
| 91 | mAmbientShadowVertexCount /* starting vertex offset */, |
| 92 | &(indices[mAmbientShadowIndexCount])); |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | } // namespace gl |
| 97 | } // namespace renderengine |
| 98 | } // namespace android |