xserver

xserver with xephyr scale patch
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regionstr.h (10879B)

      1 /***********************************************************
      2 
      3 Copyright 1987, 1998  The Open Group
      4 
      5 Permission to use, copy, modify, distribute, and sell this software and its
      6 documentation for any purpose is hereby granted without fee, provided that
      7 the above copyright notice appear in all copies and that both that
      8 copyright notice and this permission notice appear in supporting
      9 documentation.
     10 
     11 The above copyright notice and this permission notice shall be included in
     12 all copies or substantial portions of the Software.
     13 
     14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
     17 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
     18 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     19 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     20 
     21 Except as contained in this notice, the name of The Open Group shall not be
     22 used in advertising or otherwise to promote the sale, use or other dealings
     23 in this Software without prior written authorization from The Open Group.
     24 
     25 Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
     26 
     27                         All Rights Reserved
     28 
     29 Permission to use, copy, modify, and distribute this software and its
     30 documentation for any purpose and without fee is hereby granted,
     31 provided that the above copyright notice appear in all copies and that
     32 both that copyright notice and this permission notice appear in
     33 supporting documentation, and that the name of Digital not be
     34 used in advertising or publicity pertaining to distribution of the
     35 software without specific, written prior permission.
     36 
     37 DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
     38 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
     39 DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
     40 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
     41 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
     42 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
     43 SOFTWARE.
     44 
     45 ******************************************************************/
     46 
     47 #ifndef REGIONSTRUCT_H
     48 #define REGIONSTRUCT_H
     49 
     50 typedef struct pixman_region16 RegionRec, *RegionPtr;
     51 
     52 #include "miscstruct.h"
     53 
     54 /* Return values from RectIn() */
     55 
     56 #define rgnOUT 0
     57 #define rgnIN  1
     58 #define rgnPART 2
     59 
     60 #define NullRegion ((RegionPtr)0)
     61 
     62 /*
     63  *   clip region
     64  */
     65 
     66 typedef struct pixman_region16_data RegDataRec, *RegDataPtr;
     67 
     68 extern _X_EXPORT BoxRec RegionEmptyBox;
     69 extern _X_EXPORT RegDataRec RegionEmptyData;
     70 extern _X_EXPORT RegDataRec RegionBrokenData;
     71 static inline Bool
     72 RegionNil(RegionPtr reg)
     73 {
     74     return ((reg)->data && !(reg)->data->numRects);
     75 }
     76 
     77 /* not a region */
     78 
     79 static inline Bool
     80 RegionNar(RegionPtr reg)
     81 {
     82     return ((reg)->data == &RegionBrokenData);
     83 }
     84 
     85 static inline int
     86 RegionNumRects(RegionPtr reg)
     87 {
     88     return ((reg)->data ? (reg)->data->numRects : 1);
     89 }
     90 
     91 static inline int
     92 RegionSize(RegionPtr reg)
     93 {
     94     return ((reg)->data ? (reg)->data->size : 0);
     95 }
     96 
     97 static inline BoxPtr
     98 RegionRects(RegionPtr reg)
     99 {
    100     return ((reg)->data ? (BoxPtr) ((reg)->data + 1) : &(reg)->extents);
    101 }
    102 
    103 static inline BoxPtr
    104 RegionBoxptr(RegionPtr reg)
    105 {
    106     return ((BoxPtr) ((reg)->data + 1));
    107 }
    108 
    109 static inline BoxPtr
    110 RegionBox(RegionPtr reg, int i)
    111 {
    112     return (&RegionBoxptr(reg)[i]);
    113 }
    114 
    115 static inline BoxPtr
    116 RegionTop(RegionPtr reg)
    117 {
    118     return RegionBox(reg, (reg)->data->numRects);
    119 }
    120 
    121 static inline BoxPtr
    122 RegionEnd(RegionPtr reg)
    123 {
    124     return RegionBox(reg, (reg)->data->numRects - 1);
    125 }
    126 
    127 static inline size_t
    128 RegionSizeof(size_t n)
    129 {
    130     if (n < ((INT_MAX - sizeof(RegDataRec)) / sizeof(BoxRec)))
    131         return (sizeof(RegDataRec) + ((n) * sizeof(BoxRec)));
    132     else
    133         return 0;
    134 }
    135 
    136 static inline void
    137 RegionInit(RegionPtr _pReg, BoxPtr _rect, int _size)
    138 {
    139     if ((_rect) != NULL) {
    140         (_pReg)->extents = *(_rect);
    141         (_pReg)->data = (RegDataPtr) NULL;
    142     }
    143     else {
    144         size_t rgnSize;
    145         (_pReg)->extents = RegionEmptyBox;
    146         if (((_size) > 1) && ((rgnSize = RegionSizeof(_size)) > 0) &&
    147             (((_pReg)->data = (RegDataPtr) malloc(rgnSize)) != NULL)) {
    148             (_pReg)->data->size = (_size);
    149             (_pReg)->data->numRects = 0;
    150         }
    151         else
    152             (_pReg)->data = &RegionEmptyData;
    153     }
    154 }
    155 
    156 static inline Bool
    157 RegionInitBoxes(RegionPtr pReg, BoxPtr boxes, int nBoxes)
    158 {
    159     return pixman_region_init_rects(pReg, boxes, nBoxes);
    160 }
    161 
    162 static inline void
    163 RegionUninit(RegionPtr _pReg)
    164 {
    165     if ((_pReg)->data && (_pReg)->data->size) {
    166         free((_pReg)->data);
    167         (_pReg)->data = NULL;
    168     }
    169 }
    170 
    171 static inline void
    172 RegionReset(RegionPtr _pReg, BoxPtr _pBox)
    173 {
    174     (_pReg)->extents = *(_pBox);
    175     RegionUninit(_pReg);
    176     (_pReg)->data = (RegDataPtr) NULL;
    177 }
    178 
    179 static inline Bool
    180 RegionNotEmpty(RegionPtr _pReg)
    181 {
    182     return !RegionNil(_pReg);
    183 }
    184 
    185 static inline Bool
    186 RegionBroken(RegionPtr _pReg)
    187 {
    188     return RegionNar(_pReg);
    189 }
    190 
    191 static inline void
    192 RegionEmpty(RegionPtr _pReg)
    193 {
    194     RegionUninit(_pReg);
    195     (_pReg)->extents.x2 = (_pReg)->extents.x1;
    196     (_pReg)->extents.y2 = (_pReg)->extents.y1;
    197     (_pReg)->data = &RegionEmptyData;
    198 }
    199 
    200 static inline BoxPtr
    201 RegionExtents(RegionPtr _pReg)
    202 {
    203     return (&(_pReg)->extents);
    204 }
    205 
    206 static inline void
    207 RegionNull(RegionPtr _pReg)
    208 {
    209     (_pReg)->extents = RegionEmptyBox;
    210     (_pReg)->data = &RegionEmptyData;
    211 }
    212 
    213 extern _X_EXPORT void InitRegions(void);
    214 
    215 extern _X_EXPORT RegionPtr RegionCreate(BoxPtr /*rect */ ,
    216                                         int /*size */ );
    217 
    218 extern _X_EXPORT void RegionDestroy(RegionPtr /*pReg */ );
    219 
    220 extern _X_EXPORT RegionPtr RegionDuplicate(RegionPtr /* pOld */);
    221 
    222 static inline Bool
    223 RegionCopy(RegionPtr dst, RegionPtr src)
    224 {
    225     return pixman_region_copy(dst, src);
    226 }
    227 
    228 static inline Bool
    229 RegionIntersect(RegionPtr newReg,       /* destination Region */
    230                 RegionPtr reg1, RegionPtr reg2  /* source regions     */
    231     )
    232 {
    233     return pixman_region_intersect(newReg, reg1, reg2);
    234 }
    235 
    236 static inline Bool
    237 RegionUnion(RegionPtr newReg,   /* destination Region */
    238             RegionPtr reg1, RegionPtr reg2      /* source regions     */
    239     )
    240 {
    241     return pixman_region_union(newReg, reg1, reg2);
    242 }
    243 
    244 extern _X_EXPORT Bool RegionAppend(RegionPtr /*dstrgn */ ,
    245                                    RegionPtr /*rgn */ );
    246 
    247 extern _X_EXPORT Bool RegionValidate(RegionPtr /*badreg */ ,
    248                                      Bool * /*pOverlap */ );
    249 
    250 extern _X_EXPORT RegionPtr RegionFromRects(int /*nrects */ ,
    251                                            xRectanglePtr /*prect */ ,
    252                                            int /*ctype */ );
    253 
    254 /*-
    255  *-----------------------------------------------------------------------
    256  * Subtract --
    257  *	Subtract regS from regM and leave the result in regD.
    258  *	S stands for subtrahend, M for minuend and D for difference.
    259  *
    260  * Results:
    261  *	TRUE if successful.
    262  *
    263  * Side Effects:
    264  *	regD is overwritten.
    265  *
    266  *-----------------------------------------------------------------------
    267  */
    268 static inline Bool
    269 RegionSubtract(RegionPtr regD, RegionPtr regM, RegionPtr regS)
    270 {
    271     return pixman_region_subtract(regD, regM, regS);
    272 }
    273 
    274 /*-
    275  *-----------------------------------------------------------------------
    276  * Inverse --
    277  *	Take a region and a box and return a region that is everything
    278  *	in the box but not in the region. The careful reader will note
    279  *	that this is the same as subtracting the region from the box...
    280  *
    281  * Results:
    282  *	TRUE.
    283  *
    284  * Side Effects:
    285  *	newReg is overwritten.
    286  *
    287  *-----------------------------------------------------------------------
    288  */
    289 
    290 static inline Bool
    291 RegionInverse(RegionPtr newReg, /* Destination region */
    292               RegionPtr reg1,   /* Region to invert */
    293               BoxPtr invRect    /* Bounding box for inversion */
    294     )
    295 {
    296     return pixman_region_inverse(newReg, reg1, invRect);
    297 }
    298 
    299 static inline int
    300 RegionContainsRect(RegionPtr region, BoxPtr prect)
    301 {
    302     return pixman_region_contains_rectangle(region, prect);
    303 }
    304 
    305 /* TranslateRegion(pReg, x, y)
    306    translates in place
    307 */
    308 
    309 static inline void
    310 RegionTranslate(RegionPtr pReg, int x, int y)
    311 {
    312     pixman_region_translate(pReg, x, y);
    313 }
    314 
    315 extern _X_EXPORT Bool RegionBreak(RegionPtr /*pReg */ );
    316 
    317 static inline Bool
    318 RegionContainsPoint(RegionPtr pReg, int x, int y, BoxPtr box    /* "return" value */
    319     )
    320 {
    321     return pixman_region_contains_point(pReg, x, y, box);
    322 }
    323 
    324 static inline Bool
    325 RegionEqual(RegionPtr reg1, RegionPtr reg2)
    326 {
    327     return pixman_region_equal(reg1, reg2);
    328 }
    329 
    330 extern _X_EXPORT Bool RegionRectAlloc(RegionPtr /*pRgn */ ,
    331                                       int       /*n */
    332     );
    333 
    334 #ifdef DEBUG
    335 extern _X_EXPORT Bool RegionIsValid(RegionPtr   /*prgn */
    336     );
    337 #endif
    338 
    339 extern _X_EXPORT void RegionPrint(RegionPtr /*pReg */ );
    340 
    341 #define INCLUDE_LEGACY_REGION_DEFINES
    342 #ifdef INCLUDE_LEGACY_REGION_DEFINES
    343 
    344 #define REGION_NIL				RegionNil
    345 #define REGION_NAR				RegionNar
    346 #define REGION_NUM_RECTS			RegionNumRects
    347 #define REGION_SIZE				RegionSize
    348 #define REGION_RECTS				RegionRects
    349 #define REGION_BOXPTR				RegionBoxptr
    350 #define REGION_BOX				RegionBox
    351 #define REGION_TOP				RegionTop
    352 #define REGION_END				RegionEnd
    353 #define REGION_SZOF				RegionSizeof
    354 #define BITMAP_TO_REGION			BitmapToRegion
    355 #define REGION_CREATE(pScreen, r, s)		RegionCreate(r,s)
    356 #define REGION_COPY(pScreen, d, r)		RegionCopy(d, r)
    357 #define REGION_DESTROY(pScreen, r)		RegionDestroy(r)
    358 #define REGION_INTERSECT(pScreen, res, r1, r2)	RegionIntersect(res, r1, r2)
    359 #define REGION_UNION(pScreen, res, r1, r2)	RegionUnion(res, r1, r2)
    360 #define REGION_SUBTRACT(pScreen, res, r1, r2)	RegionSubtract(res, r1, r2)
    361 #define REGION_INVERSE(pScreen, n, r, b)	RegionInverse(n, r, b)
    362 #define REGION_TRANSLATE(pScreen, r, x, y)	RegionTranslate(r, x, y)
    363 #define RECT_IN_REGION(pScreen, r, b) 		RegionContainsRect(r, b)
    364 #define POINT_IN_REGION(pScreen, r, x, y, b) 	RegionContainsPoint(r, x, y, b)
    365 #define REGION_EQUAL(pScreen, r1, r2)		RegionEqual(r1, r2)
    366 #define REGION_APPEND(pScreen, d, r)		RegionAppend(d, r)
    367 #define REGION_VALIDATE(pScreen, r, o)		RegionValidate(r, o)
    368 #define RECTS_TO_REGION(pScreen, n, r, c)	RegionFromRects(n, r, c)
    369 #define REGION_BREAK(pScreen, r)		RegionBreak(r)
    370 #define REGION_INIT(pScreen, r, b, s)		RegionInit(r, b, s)
    371 #define REGION_UNINIT(pScreen, r)		RegionUninit(r)
    372 #define REGION_RESET(pScreen, r, b)		RegionReset(r, b)
    373 #define REGION_NOTEMPTY(pScreen, r)		RegionNotEmpty(r)
    374 #define REGION_BROKEN(pScreen, r)		RegionBroken(r)
    375 #define REGION_EMPTY(pScreen, r)		RegionEmpty(r)
    376 #define REGION_EXTENTS(pScreen, r)		RegionExtents(r)
    377 #define REGION_NULL(pScreen, r)			RegionNull(r)
    378 
    379 #endif                          /* INCLUDE_LEGACY_REGION_DEFINES */
    380 #endif                          /* REGIONSTRUCT_H */