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 namespace android { 23 namespace uirenderer { 24 25 /** 26 * Simple structure to describe a vertex with a position and a texture. 27 */ 28 struct Vertex { 29 /** 30 * Fudge-factor used to disambiguate geometry pixel positioning. 31 * 32 * Used to offset lines and points to avoid ambiguous intersection with pixel centers (see 33 * Program::set()), and used to make geometry damage rect calculation conservative (see 34 * Rect::snapGeometryToPixelBoundaries()) 35 */ 36 static const float gGeometryFudgeFactor = 0.0656f; 37 38 float position[2]; 39 setVertex40 static inline void set(Vertex* vertex, float x, float y) { 41 vertex[0].position[0] = x; 42 vertex[0].position[1] = y; 43 } 44 setVertex45 static inline void set(Vertex* vertex, vec2 val) { 46 set(vertex, val.x, val.y); 47 } 48 copyWithOffsetVertex49 static inline void copyWithOffset(Vertex* vertex, const Vertex& src, float x, float y) { 50 set(vertex, src.position[0] + x, src.position[1] + y); 51 } 52 53 }; // struct Vertex 54 55 /** 56 * Simple structure to describe a vertex with a position and texture UV. 57 */ 58 struct TextureVertex { 59 float position[2]; 60 float texture[2]; 61 setTextureVertex62 static inline void set(TextureVertex* vertex, float x, float y, float u, float v) { 63 vertex[0].position[0] = x; 64 vertex[0].position[1] = y; 65 vertex[0].texture[0] = u; 66 vertex[0].texture[1] = v; 67 } 68 setUVTextureVertex69 static inline void setUV(TextureVertex* vertex, float u, float v) { 70 vertex[0].texture[0] = u; 71 vertex[0].texture[1] = v; 72 } 73 }; // struct TextureVertex 74 75 /** 76 * Simple structure to describe a vertex with a position, texture UV and ARGB color. 77 */ 78 struct ColorTextureVertex : TextureVertex { 79 float color[4]; 80 setColorTextureVertex81 static inline void set(ColorTextureVertex* vertex, float x, float y, 82 float u, float v, int color) { 83 TextureVertex::set(vertex, x, y, u, v); 84 85 const float a = ((color >> 24) & 0xff) / 255.0f; 86 vertex[0].color[0] = a * ((color >> 16) & 0xff) / 255.0f; 87 vertex[0].color[1] = a * ((color >> 8) & 0xff) / 255.0f; 88 vertex[0].color[2] = a * ((color ) & 0xff) / 255.0f; 89 vertex[0].color[3] = a; 90 } 91 }; // struct ColorTextureVertex 92 93 /** 94 * Simple structure to describe a vertex with a position and an alpha value. 95 */ 96 struct AlphaVertex : Vertex { 97 float alpha; 98 setAlphaVertex99 static inline void set(AlphaVertex* vertex, float x, float y, float alpha) { 100 Vertex::set(vertex, x, y); 101 vertex[0].alpha = alpha; 102 } 103 copyWithOffsetAlphaVertex104 static inline void copyWithOffset(AlphaVertex* vertex, const AlphaVertex& src, 105 float x, float y) { 106 Vertex::set(vertex, src.position[0] + x, src.position[1] + y); 107 vertex[0].alpha = src.alpha; 108 } 109 setColorAlphaVertex110 static inline void setColor(AlphaVertex* vertex, float alpha) { 111 vertex[0].alpha = alpha; 112 } 113 }; // struct AlphaVertex 114 115 }; // namespace uirenderer 116 }; // namespace android 117 118 #endif // ANDROID_HWUI_VERTEX_H 119