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 41 float x, y; 42 43 static inline void set(Vertex* vertex, float x, float y) { 44 vertex->x = x; 45 vertex->y = y; 46 } 47 48 static inline void set(Vertex* vertex, Vector2 val) { 49 set(vertex, val.x, val.y); 50 } 51 52 static inline void copyWithOffset(Vertex* vertex, const Vertex& src, float x, float y) { 53 set(vertex, src.x + x, src.y + y); 54 } 55 56 }; // struct Vertex 57 58 REQUIRE_COMPATIBLE_LAYOUT(Vertex); 59 60 /** 61 * Simple structure to describe a vertex with a position and texture UV. 62 */ 63 struct TextureVertex { 64 float x, y; 65 float u, v; 66 67 static inline void set(TextureVertex* vertex, float x, float y, float u, float v) { 68 *vertex = { x, y, u, v }; 69 } 70 71 static inline void setUV(TextureVertex* vertex, float u, float v) { 72 vertex[0].u = u; 73 vertex[0].v = v; 74 } 75 }; // struct TextureVertex 76 77 REQUIRE_COMPATIBLE_LAYOUT(TextureVertex); 78 79 /** 80 * Simple structure to describe a vertex with a position, texture UV and ARGB color. 81 */ 82 struct ColorTextureVertex { 83 float x, y; 84 float u, v; 85 float r, g, b, a; 86 87 static inline void set(ColorTextureVertex* vertex, float x, float y, 88 float u, float v, int color) { 89 90 float a = ((color >> 24) & 0xff) / 255.0f; 91 float r = a * ((color >> 16) & 0xff) / 255.0f; 92 float g = a * ((color >> 8) & 0xff) / 255.0f; 93 float b = a * ((color) & 0xff) / 255.0f; 94 *vertex = { x, y, u, v, r, g, b, a }; 95 } 96 }; // struct ColorTextureVertex 97 98 REQUIRE_COMPATIBLE_LAYOUT(ColorTextureVertex); 99 100 /** 101 * Simple structure to describe a vertex with a position and an alpha value. 102 */ 103 struct AlphaVertex { 104 float x, y; 105 float alpha; 106 107 static inline void set(AlphaVertex* vertex, float x, float y, float alpha) { 108 *vertex = { x, y, alpha }; 109 } 110 111 static inline void copyWithOffset(AlphaVertex* vertex, const AlphaVertex& src, 112 float x, float y) { 113 AlphaVertex::set(vertex, src.x + x, src.y + y, src.alpha); 114 } 115 116 static inline void setColor(AlphaVertex* vertex, float alpha) { 117 vertex[0].alpha = alpha; 118 } 119 }; // struct AlphaVertex 120 121 REQUIRE_COMPATIBLE_LAYOUT(AlphaVertex); 122 123 }; // namespace uirenderer 124 }; // namespace android 125 126 #endif // ANDROID_HWUI_VERTEX_H 127
