1 /* 2 * Copyright © 2012 Intel Corporation 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining 5 * a copy of this software and associated documentation files (the 6 * "Software"), to deal in the Software without restriction, including 7 * without limitation the rights to use, copy, modify, merge, publish, 8 * distribute, sublicense, and/or sell copies of the Software, and to 9 * permit persons to whom the Software is furnished to do so, subject to 10 * the following conditions: 11 * 12 * The above copyright notice and this permission notice (including the 13 * next paragraph) shall be included in all copies or substantial 14 * portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 20 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 21 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 * SOFTWARE. 24 */ 25 #ifndef _WESTON_VERTEX_CLIPPING_H 26 #define _WESTON_VERTEX_CLIPPING_H 27 28 struct polygon8 { 29 float x[8]; 30 float y[8]; 31 int n; 32 }; 33 34 struct clip_context { 35 struct { 36 float x; 37 float y; 38 } prev; 39 40 struct { 41 float x1, y1; 42 float x2, y2; 43 } clip; 44 45 struct { 46 float *x; 47 float *y; 48 } vertices; 49 }; 50 51 float 52 float_difference(float a, float b); 53 54 int 55 clip_simple(struct clip_context *ctx, 56 struct polygon8 *surf, 57 float *ex, 58 float *ey); 59 60 int 61 clip_transformed(struct clip_context *ctx, 62 struct polygon8 *surf, 63 float *ex, 64 float *ey);\ 65 66 #endif 67