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) { set(vertex, val.x, val.y); } 48 49 static inline void copyWithOffset(Vertex* vertex, const Vertex& src, float x, float y) { 50 set(vertex, src.x + x, src.y + y); 51 } 52 53 }; // struct Vertex 54 55 REQUIRE_COMPATIBLE_LAYOUT(Vertex); 56 57 /** 58 * Simple structure to describe a vertex with a position and texture UV. 59 */ 60 struct TextureVertex { 61 float x, y; 62 float u, v; 63 64 static inline void set(TextureVertex* vertex, float x, float y, float u, float v) { 65 *vertex = {x, y, u, v}; 66 } 67 68 static inline void setUV(TextureVertex* vertex, float u, float v) { 69 vertex[0].u = u; 70 vertex[0].v = v; 71 } 72 }; // struct TextureVertex 73 74 REQUIRE_COMPATIBLE_LAYOUT(TextureVertex); 75 76 } // namespace uirenderer 77 } // namespace android 78 79 #endif // ANDROID_HWUI_VERTEX_H 80
