1 /* Copyright (C) 2007-2008 The Android Open Source Project 2 ** 3 ** This software is licensed under the terms of the GNU General Public 4 ** License version 2, as published by the Free Software Foundation, and 5 ** may be copied, distributed, and modified under those terms. 6 ** 7 ** This program is distributed in the hope that it will be useful, 8 ** but WITHOUT ANY WARRANTY; without even the implied warranty of 9 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 ** GNU General Public License for more details. 11 */ 12 #ifndef _ANDROID_SKIN_REGION_H 13 #define _ANDROID_SKIN_REGION_H 14 15 #include "android/skin/rect.h" 16 17 typedef struct SkinRegion SkinRegion; 18 19 extern void skin_region_init_empty( SkinRegion* r ); 20 extern void skin_region_init( SkinRegion* r, int x1, int y1, int x2, int y2 ); 21 extern void skin_region_init_rect( SkinRegion* r, SkinRect* rect ); 22 extern void skin_region_init_box( SkinRegion* r, SkinBox* box ); 23 extern void skin_region_init_copy( SkinRegion* r, SkinRegion* r2 ); 24 extern void skin_region_reset( SkinRegion* r ); 25 26 /* finalize region, then copy src into it */ 27 extern void skin_region_copy( SkinRegion* r, SkinRegion* src ); 28 29 /* compare two regions for equality */ 30 extern int skin_region_equals( SkinRegion* r1, SkinRegion* r2 ); 31 32 /* swap two regions */ 33 extern void skin_region_swap( SkinRegion* r, SkinRegion* r2 ); 34 35 extern int skin_region_is_empty( SkinRegion* r ); 36 extern int skin_region_is_rect( SkinRegion* r ); 37 extern int skin_region_is_complex( SkinRegion* r ); 38 extern void skin_region_get_bounds( SkinRegion* r, SkinRect* bounds ); 39 40 extern void skin_region_translate( SkinRegion* r, int dx, int dy ); 41 42 extern SkinOverlap skin_region_contains( SkinRegion* r, int x, int y ); 43 44 extern SkinOverlap skin_region_contains_rect( SkinRegion* r, 45 SkinRect* rect ); 46 47 extern SkinOverlap skin_region_contains_box( SkinRegion* r, SkinBox* b ); 48 49 /* returns overlap mode for "is r2 inside r1" */ 50 extern SkinOverlap skin_region_test_intersect( SkinRegion* r1, 51 SkinRegion* r2 ); 52 53 /* performs r = (intersect r r2), returns true if the resulting region 54 is not empty */ 55 extern int skin_region_intersect ( SkinRegion* r, SkinRegion* r2 ); 56 extern int skin_region_intersect_rect( SkinRegion* r, SkinRect* rect ); 57 58 /* performs r = (intersect r (region+_from_rect rect)), returns true iff 59 the resulting region is not empty */ 60 61 /* performs r = (union r r2) */ 62 extern void skin_region_union ( SkinRegion* r, SkinRegion* r2 ); 63 extern void skin_region_union_rect( SkinRegion* r, SkinRect* rect ); 64 65 /* performs r = (difference r r2) */ 66 extern void skin_region_substract ( SkinRegion* r, SkinRegion* r2 ); 67 extern void skin_region_substract_rect( SkinRegion* r, SkinRect* rect ); 68 69 /* performs r = (xor r r2) */ 70 extern void skin_region_xor( SkinRegion* r, SkinRegion* r2 ); 71 72 typedef struct SkinRegionIterator SkinRegionIterator; 73 74 /* iterator */ 75 extern void skin_region_iterator_init( SkinRegionIterator* iter, 76 SkinRegion* r ); 77 78 extern int skin_region_iterator_next( SkinRegionIterator* iter, 79 SkinRect *rect ); 80 81 extern int skin_rection_iterator_next_box( SkinRegionIterator* iter, 82 SkinBox *box ); 83 84 /* the following should be considered private definitions. they're only here 85 to allow clients to allocate SkinRegion objects themselves... */ 86 87 typedef signed short SkinRegionRun; 88 #define SKIN_REGION_SENTINEL 0x7fff 89 90 struct SkinRegion 91 { 92 SkinRect bounds; 93 SkinRegionRun* runs; 94 }; 95 96 struct SkinRegionIterator 97 { 98 SkinRegion* region; 99 SkinRegionRun* band; 100 SkinRegionRun* span; 101 }; 102 103 #endif /* _ANDROID_SKIN_REGION_H */ 104
