1 /* 2 * Copyright (C) 2010 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 #ifndef ANDROID_HWUI_VERTEX_H 18 #define ANDROID_HWUI_VERTEX_H 19 20 #include "Vector.h" 21 22 #include "utils/Macros.h" 23 24 namespace android { 25 namespace uirenderer { 26 27 /** 28 * Simple structure to describe a vertex with a position and a texture. 29 */ 30 struct Vertex { 31 /** 32 * Fudge-factor used to disambiguate geometry pixel positioning. 33 * 34 * Used to offset lines and points to avoid ambiguous intersection with pixel centers (see 35 * Program::set()), and used to make geometry damage rect calculation conservative (see 36 * Rect::snapGeometryToPixelBoundaries()) 37 */ 38 static float GeometryFudgeFactor() { return 0.0656f; } 39 40 float x, y; 41 42 static inline void set(Vertex* vertex, float x, float y) { 43 vertex->x = x; 44 vertex->y = y; 45 } 46 47 static inline void set(Vertex* vertex, Vector2 val) { 48 set(vertex, val.x, val.y); 49 } 50 51 static inline void copyWithOffset(Vertex* vertex, const Vertex& src, float x, float y) { 52 set(vertex, src.x + x, src.y + y); 53 } 54 55 }; // struct Vertex 56 57 REQUIRE_COMPATIBLE_LAYOUT(Vertex); 58 59 /** 60 * Simple structure to describe a vertex with a position and texture UV. 61 */ 62 struct TextureVertex { 63 float x, y; 64 float u, v; 65 66 static inline void set(TextureVertex* vertex, float x, float y, float u, float v) { 67 *vertex = { x, y, u, v }; 68 } 69 70 static inline void setUV(TextureVertex* vertex, float u, float v) { 71 vertex[0].u = u; 72 vertex[0].v = v; 73 } 74 }; // struct TextureVertex 75 76 REQUIRE_COMPATIBLE_LAYOUT(TextureVertex); 77 78 /** 79 * Simple structure to describe a vertex with a position, texture UV and ARGB color. 80 */ 81 struct ColorTextureVertex { 82 float x, y; 83 float u, v; 84 float r, g, b, a; 85 86 static inline void set(ColorTextureVertex* vertex, float x, float y, 87 float u, float v, int color) { 88 89 float a = ((color >> 24) & 0xff) / 255.0f; 90 float r = a * ((color >> 16) & 0xff) / 255.0f; 91 float g = a * ((color >> 8) & 0xff) / 255.0f; 92 float b = a * ((color) & 0xff) / 255.0f; 93 *vertex = { x, y, u, v, r, g, b, a }; 94 } 95 }; // struct ColorTextureVertex 96 97 REQUIRE_COMPATIBLE_LAYOUT(ColorTextureVertex); 98 99 /** 100 * Simple structure to describe a vertex with a position and an alpha value. 101 */ 102 struct AlphaVertex { 103 float x, y; 104 float alpha; 105 106 static inline void set(AlphaVertex* vertex, float x, float y, float alpha) { 107 *vertex = { x, y, alpha }; 108 } 109 110 static inline void copyWithOffset(AlphaVertex* vertex, const AlphaVertex& src, 111 float x, float y) { 112 AlphaVertex::set(vertex, src.x + x, src.y + y, src.alpha); 113 } 114 115 static inline void setColor(AlphaVertex* vertex, float alpha) { 116 vertex[0].alpha = alpha; 117 } 118 }; // struct AlphaVertex 119 120 REQUIRE_COMPATIBLE_LAYOUT(AlphaVertex); 121 122 }; // namespace uirenderer 123 }; // namespace android 124 125 #endif // ANDROID_HWUI_VERTEX_H 126
