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comparison src/geo.c @ 143:21db69d46835

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Fix the problem that left-upper side of a moving shape will be flashed. It is because a coord without member always have a {x=0, y=0, w=1, h=1} geometry value. It cause most left-upper corner been updated. It also cause Cairo to update minmum area that include all updated pixels. So, left-upper side of a updated shape will be updated by Cairo by copy application buffer to window. It causes cursor flashing.
author Thinker K.F. Li <thinker@branda.to>
date Thu, 25 Sep 2008 01:42:49 +0800
parents 0f3baa488a62
children 7444dea34c6b
comparison
equal deleted inserted replaced
142:3efe77007127 143:21db69d46835
18 } 18 }
19 return 1; 19 return 1;
20 } 20 }
21 21
22 static int _is_overlay(area_t *r1, area_t *r2) { 22 static int _is_overlay(area_t *r1, area_t *r2) {
23 if(!is_scale_overlay(r1->x, r1->w, r2->x, r2->w)) 23 if(is_scale_overlay(r1->x, r1->w, r2->x, r2->w) &&
24 return 0; 24 is_scale_overlay(r1->y, r1->h, r2->y, r2->h))
25 if(!is_scale_overlay(r1->y, r1->h, r2->y, r2->h)) 25 return 1;
26 return 0; 26
27 27 return 0;
28 return 1;
29 } 28 }
30 29
31 int is_overlay(area_t *r1, area_t *r2) { 30 int is_overlay(area_t *r1, area_t *r2) {
32 return _is_overlay(r1, r2); 31 return _is_overlay(r1, r2);
33 } 32 }
36 co_aix min_x, max_x; 35 co_aix min_x, max_x;
37 co_aix min_y, max_y; 36 co_aix min_y, max_y;
38 co_aix x, y; 37 co_aix x, y;
39 int i; 38 int i;
40 39
40 if(n_pos == 0) {
41 area->x = 0;
42 area->w = 0;
43 area->y = 0;
44 area->h = 0;
45 return;
46 }
47
41 min_x = max_x = pos[0][0]; 48 min_x = max_x = pos[0][0];
42 min_y = max_y = pos[0][1]; 49 min_y = max_y = pos[0][1];
43 for(i = 1; i < n_pos; i++) { 50 for(i = 1; i < n_pos; i++) {
44 x = pos[i][0]; 51 x = pos[i][0];
45 if(x < min_x) 52 if(x < min_x)