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comparison test/automated/common/common.c @ 3477:2c07bb579922

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We want to be strict on software renderer tests and opaque tests, but give a decent margin for blending inaccuracy for the blended tests.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 21 Nov 2009 07:59:19 +0000
parents ab99313951cd
children c32c53fca10d
comparison
equal deleted inserted replaced
3476:ab99313951cd 3477:2c07bb579922
14 14
15 15
16 /** 16 /**
17 * @brief Compares a surface and a surface image for equality. 17 * @brief Compares a surface and a surface image for equality.
18 */ 18 */
19 int surface_compare( SDL_Surface *sur, const SurfaceImage_t *img ) 19 int surface_compare( SDL_Surface *sur, const SurfaceImage_t *img, int allowable_error )
20 { 20 {
21 int ret; 21 int ret;
22 int i,j; 22 int i,j;
23 int bpp; 23 int bpp;
24 Uint8 *p, *pd; 24 Uint8 *p, *pd;
60 dist += (R-pd[0])*(R-pd[0]); 60 dist += (R-pd[0])*(R-pd[0]);
61 dist += (G-pd[1])*(G-pd[1]); 61 dist += (G-pd[1])*(G-pd[1]);
62 dist += (B-pd[2])*(B-pd[2]); 62 dist += (B-pd[2])*(B-pd[2]);
63 dist += (A-pd[3])*(A-pd[3]); 63 dist += (A-pd[3])*(A-pd[3]);
64 } 64 }
65 /* Allow up to sqrt(32) difference in blending accuracy */ 65 /* Allow some difference in blending accuracy */
66 if (dist > 64) { 66 if (dist > allowable_error) {
67 /*printf("pixel %d,%d varies by %d\n", i, j, dist);*/ 67 /*printf("pixel %d,%d varies by %d\n", i, j, dist);*/
68 ++ret; 68 ++ret;
69 } 69 }
70 } 70 }
71 break; 71 break;