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Annotation of researchv9/X11/src/X.V11R1/server/include/regionstr.h, revision 1.1

1.1     ! root        1: /* $Header: regionstr.h,v 1.1 87/09/11 07:50:10 toddb Exp $ */
        !             2: /***********************************************************
        !             3: Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts,
        !             4: and the Massachusetts Institute of Technology, Cambridge, Massachusetts.
        !             5: 
        !             6:                         All Rights Reserved
        !             7: 
        !             8: Permission to use, copy, modify, and distribute this software and its 
        !             9: documentation for any purpose and without fee is hereby granted, 
        !            10: provided that the above copyright notice appear in all copies and that
        !            11: both that copyright notice and this permission notice appear in 
        !            12: supporting documentation, and that the names of Digital or MIT not be
        !            13: used in advertising or publicity pertaining to distribution of the
        !            14: software without specific, written prior permission.  
        !            15: 
        !            16: DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
        !            17: ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
        !            18: DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
        !            19: ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
        !            20: WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
        !            21: ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
        !            22: SOFTWARE.
        !            23: 
        !            24: ******************************************************************/
        !            25: #ifndef REGIONSTRUCT_H
        !            26: #define REGIONSTRUCT_H
        !            27: 
        !            28: #include "region.h"
        !            29: #include "miscstruct.h"
        !            30: /* 
        !            31:  *   clip region
        !            32:  */
        !            33: 
        !            34: typedef struct _Region {
        !            35:     short      size;
        !            36:     short      numRects;
        !            37:     BoxPtr     rects;
        !            38:     BoxRec     extents;
        !            39: } RegionRec;
        !            40: 
        !            41: /*
        !            42:  *   Check to see if there is enough memory in the present region.
        !            43:  */
        !            44: #define MEMCHECK(reg, rect, firstrect){\
        !            45:         if ((reg)->numRects >= ((reg)->size - 1)){\
        !            46:           (firstrect) = (BoxPtr) Xrealloc \
        !            47:           ((firstrect), (2 * (sizeof(BoxRec)) * ((reg)->size)));\
        !            48:           (reg)->size *= 2;\
        !            49:           (rect) = &(firstrect)[(reg)->numRects];\
        !            50:          }\
        !            51:        }
        !            52: 
        !            53: /*  this routine checks to see if the previous rectangle is the same
        !            54:  *  or subsumes the new rectangle to add.
        !            55:  */
        !            56: 
        !            57: #define CHECK_PREVIOUS(Reg, R, Rx1, Ry1, Rx2, Ry2)\
        !            58:                (!(((Reg)->numRects > 0)&&\
        !            59:                   ((R-1)->y1 == (Ry1)) &&\
        !            60:                   ((R-1)->y2 == (Ry2)) &&\
        !            61:                   ((R-1)->x1 <= (Rx1)) &&\
        !            62:                   ((R-1)->x2 >= (Rx2))))
        !            63: 
        !            64: /*  add a rectangle to the given Region */
        !            65: #define ADDRECT(reg, r, rx1, ry1, rx2, ry2){\
        !            66:     if (((rx1) < (rx2)) && ((ry1) < (ry2)) &&\
        !            67:         CHECK_PREVIOUS((reg), (r), (rx1), (ry1), (rx2), (ry2))){\
        !            68:               (r)->x1 = (rx1);\
        !            69:               (r)->y1 = (ry1);\
        !            70:               (r)->x2 = (rx2);\
        !            71:               (r)->y2 = (ry2);\
        !            72:               EXTENTS((r), (reg));\
        !            73:               (reg)->numRects++;\
        !            74:               (r)++;\
        !            75:             }\
        !            76:         }
        !            77: 
        !            78: 
        !            79: /*
        !            80:  *  update region extents
        !            81:  */
        !            82: #define EXTENTS(r,idRect){\
        !            83:             if((r)->x1 < (idRect)->extents.x1)\
        !            84:               (idRect)->extents.x1 = (r)->x1;\
        !            85:             if((r)->y1 < (idRect)->extents.y1)\
        !            86:               (idRect)->extents.y1 = (r)->y1;\
        !            87:             if((r)->x2 > (idRect)->extents.x2)\
        !            88:               (idRect)->extents.x2 = (r)->x2;\
        !            89:             if((r)->y2 > (idRect)->extents.y2)\
        !            90:               (idRect)->extents.y2 = (r)->y2;\
        !            91:         }
        !            92: 
        !            93: 
        !            94: #define EMPTY_REGION(pReg) (pReg->numRects = 0)
        !            95: 
        !            96: #define REGION_NOT_EMPTY(pReg) (pReg->numRects)
        !            97: 
        !            98: extern RegionPtr miRegionCreate();
        !            99: extern void miprintRects();
        !           100: extern void miRegionCopy();
        !           101: extern int miInverse();
        !           102: extern int miIntersect();
        !           103: extern int miUnion();
        !           104: extern int miSubtract();
        !           105: extern int miRectIn();
        !           106: extern void miTranslateRegion();
        !           107: extern void miRegionDestroy();
        !           108: extern void miRegionReset();
        !           109: extern Bool miPointInRegion();
        !           110: 
        !           111: #endif /* REGIONSTRUCT_H */

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