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 "FloatColor.h" 23 #include "utils/Macros.h" 24 25 namespace android { 26 namespace uirenderer { 27 28 /** 29 * Simple structure to describe a vertex with a position and a texture. 30 */ 31 struct Vertex { 32 /** 33 * Fudge-factor used to disambiguate geometry pixel positioning. 34 * 35 * Used to offset lines and points to avoid ambiguous intersection with pixel centers (see 36 * Program::set()), and used to make geometry damage rect calculation conservative (see 37 * Rect::snapGeometryToPixelBoundaries()) 38 */ GeometryFudgeFactorVertex39 static float GeometryFudgeFactor() { return 0.0656f; } 40 41 float x, y; 42 setVertex43 static inline void set(Vertex* vertex, float x, float y) { 44 vertex->x = x; 45 vertex->y = y; 46 } 47 setVertex48 static inline void set(Vertex* vertex, Vector2 val) { set(vertex, val.x, val.y); } 49 copyWithOffsetVertex50 static inline void copyWithOffset(Vertex* vertex, const Vertex& src, float x, float y) { 51 set(vertex, src.x + x, src.y + y); 52 } 53 54 }; // struct Vertex 55 56 REQUIRE_COMPATIBLE_LAYOUT(Vertex); 57 58 /** 59 * Simple structure to describe a vertex with a position and texture UV. 60 */ 61 struct TextureVertex { 62 float x, y; 63 float u, v; 64 setTextureVertex65 static inline void set(TextureVertex* vertex, float x, float y, float u, float v) { 66 *vertex = {x, y, u, v}; 67 } 68 setUVTextureVertex69 static inline void setUV(TextureVertex* vertex, float u, float v) { 70 vertex[0].u = u; 71 vertex[0].v = v; 72 } 73 }; // struct TextureVertex 74 75 REQUIRE_COMPATIBLE_LAYOUT(TextureVertex); 76 77 /** 78 * Simple structure to describe a vertex with a position, texture UV and an 79 * sRGB color with alpha. The color is stored pre-multiplied in linear space. 80 */ 81 struct ColorTextureVertex { 82 float x, y; 83 float u, v; 84 float r, g, b, a; // pre-multiplied linear 85 setColorTextureVertex86 static inline void set(ColorTextureVertex* vertex, float x, float y, float u, float v, 87 uint32_t color) { 88 FloatColor c; 89 c.set(color); 90 *vertex = {x, y, u, v, c.r, c.g, c.b, c.a}; 91 } 92 }; // struct ColorTextureVertex 93 94 REQUIRE_COMPATIBLE_LAYOUT(ColorTextureVertex); 95 96 /** 97 * Simple structure to describe a vertex with a position and an alpha value. 98 */ 99 struct AlphaVertex { 100 float x, y; 101 float alpha; 102 setAlphaVertex103 static inline void set(AlphaVertex* vertex, float x, float y, float alpha) { 104 *vertex = {x, y, alpha}; 105 } 106 copyWithOffsetAlphaVertex107 static inline void copyWithOffset(AlphaVertex* vertex, const AlphaVertex& src, float x, 108 float y) { 109 AlphaVertex::set(vertex, src.x + x, src.y + y, src.alpha); 110 } 111 setColorAlphaVertex112 static inline void setColor(AlphaVertex* vertex, float alpha) { vertex[0].alpha = alpha; } 113 }; // struct AlphaVertex 114 115 REQUIRE_COMPATIBLE_LAYOUT(AlphaVertex); 116 117 }; // namespace uirenderer 118 }; // namespace android 119 120 #endif // ANDROID_HWUI_VERTEX_H 121