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/* Copyright (C) 2007-2008 The Android Open Source Project
**
** This software is licensed under the terms of the GNU General Public
** License version 2, as published by the Free Software Foundation, and
** may be copied, distributed, and modified under those terms.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
*/
#ifndef _ANDROID_SKIN_REGION_H
#define _ANDROID_SKIN_REGION_H
#include "android/skin/rect.h"
typedef struct SkinRegion SkinRegion;
extern void skin_region_init_empty( SkinRegion* r );
extern void skin_region_init( SkinRegion* r, int x1, int y1, int x2, int y2 );
extern void skin_region_init_rect( SkinRegion* r, SkinRect* rect );
extern void skin_region_init_box( SkinRegion* r, SkinBox* box );
extern void skin_region_init_copy( SkinRegion* r, SkinRegion* r2 );
extern void skin_region_reset( SkinRegion* r );
/* finalize region, then copy src into it */
extern void skin_region_copy( SkinRegion* r, SkinRegion* src );
/* compare two regions for equality */
extern int skin_region_equals( SkinRegion* r1, SkinRegion* r2 );
/* swap two regions */
extern void skin_region_swap( SkinRegion* r, SkinRegion* r2 );
extern int skin_region_is_empty( SkinRegion* r );
extern int skin_region_is_rect( SkinRegion* r );
extern int skin_region_is_complex( SkinRegion* r );
extern void skin_region_get_bounds( SkinRegion* r, SkinRect* bounds );
extern void skin_region_translate( SkinRegion* r, int dx, int dy );
extern SkinOverlap skin_region_contains( SkinRegion* r, int x, int y );
extern SkinOverlap skin_region_contains_rect( SkinRegion* r,
SkinRect* rect );
extern SkinOverlap skin_region_contains_box( SkinRegion* r, SkinBox* b );
/* returns overlap mode for "is r2 inside r1" */
extern SkinOverlap skin_region_test_intersect( SkinRegion* r1,
SkinRegion* r2 );
/* performs r = (intersect r r2), returns true if the resulting region
is not empty */
extern int skin_region_intersect ( SkinRegion* r, SkinRegion* r2 );
extern int skin_region_intersect_rect( SkinRegion* r, SkinRect* rect );
/* performs r = (intersect r (region+_from_rect rect)), returns true iff
the resulting region is not empty */
/* performs r = (union r r2) */
extern void skin_region_union ( SkinRegion* r, SkinRegion* r2 );
extern void skin_region_union_rect( SkinRegion* r, SkinRect* rect );
/* performs r = (difference r r2) */
extern void skin_region_substract ( SkinRegion* r, SkinRegion* r2 );
extern void skin_region_substract_rect( SkinRegion* r, SkinRect* rect );
/* performs r = (xor r r2) */
extern void skin_region_xor( SkinRegion* r, SkinRegion* r2 );
typedef struct SkinRegionIterator SkinRegionIterator;
/* iterator */
extern void skin_region_iterator_init( SkinRegionIterator* iter,
SkinRegion* r );
extern int skin_region_iterator_next( SkinRegionIterator* iter,
SkinRect *rect );
extern int skin_rection_iterator_next_box( SkinRegionIterator* iter,
SkinBox *box );
/* the following should be considered private definitions. they're only here
to allow clients to allocate SkinRegion objects themselves... */
typedef signed short SkinRegionRun;
#define SKIN_REGION_SENTINEL 0x7fff
struct SkinRegion
{
SkinRect bounds;
SkinRegionRun* runs;
};
struct SkinRegionIterator
{
SkinRegion* region;
SkinRegionRun* band;
SkinRegionRun* span;
};
#endif /* _ANDROID_SKIN_REGION_H */
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