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Annotation of researchv9/X11/src/X.V11R1/server/ddx/mfb/mfbfillrct.c, revision 1.1

1.1     ! root        1: /***********************************************************
        !             2: Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts,
        !             3: and the Massachusetts Institute of Technology, Cambridge, Massachusetts.
        !             4: 
        !             5:                         All Rights Reserved
        !             6: 
        !             7: Permission to use, copy, modify, and distribute this software and its 
        !             8: documentation for any purpose and without fee is hereby granted, 
        !             9: provided that the above copyright notice appear in all copies and that
        !            10: both that copyright notice and this permission notice appear in 
        !            11: supporting documentation, and that the names of Digital or MIT not be
        !            12: used in advertising or publicity pertaining to distribution of the
        !            13: software without specific, written prior permission.  
        !            14: 
        !            15: DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
        !            16: ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
        !            17: DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
        !            18: ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
        !            19: WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
        !            20: ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
        !            21: SOFTWARE.
        !            22: 
        !            23: ******************************************************************/
        !            24: /* $Header: mfbfillrct.c,v 1.32 87/09/08 15:32:46 drewry Locked $ */
        !            25: #include "X.h"
        !            26: #include "Xprotostr.h"
        !            27: #include "pixmapstr.h"
        !            28: #include "gcstruct.h"
        !            29: #include "windowstr.h"
        !            30: #include "miscstruct.h"
        !            31: #include "regionstr.h"
        !            32: #include "scrnintstr.h"
        !            33: 
        !            34: #include "mfb.h"
        !            35: #include "maskbits.h"
        !            36: 
        !            37: #define MODEQ(a, b) ((a) %= (b))
        !            38: void mfbPaintOddSize();
        !            39: 
        !            40: /* 
        !            41:     filled rectangles.
        !            42:     translate the rectangles, clip them, and call the
        !            43: helper function in the GC.
        !            44: */
        !            45: 
        !            46: void
        !            47: mfbPolyFillRect(pDrawable, pGC, nrectFill, prectInit)
        !            48:     DrawablePtr pDrawable;
        !            49:     GCPtr      pGC;
        !            50:     int                nrectFill;      /* number of rectangles to fill */
        !            51:     xRectangle *prectInit;     /* Pointer to first rectangle to fill */
        !            52: {
        !            53:     int xorg, yorg;
        !            54:     register int n;            /* spare counter */
        !            55:     xRectangle *prect;         /* temporary */
        !            56:     RegionPtr prgnClip;
        !            57:     register BoxPtr pbox;      /* used to clip with */
        !            58:     register BoxPtr pboxClipped;
        !            59:     BoxPtr pboxClippedBase;
        !            60: 
        !            61:     int alu;
        !            62:     void (* pfn) ();
        !            63:     PixmapPtr ppix;
        !            64: 
        !            65:     alu = ((mfbPrivGC *)(pGC->devPriv))->ropFillArea;
        !            66:     pfn = ((mfbPrivGC *)(pGC->devPriv))->FillArea;
        !            67:     ppix = *( ((mfbPrivGC *)(pGC->devPriv))->ppPixmap);
        !            68:     prgnClip = ((mfbPrivGC *)(pGC->devPriv))->pCompositeClip;
        !            69: 
        !            70:     pboxClippedBase = (BoxPtr)ALLOCATE_LOCAL(prgnClip->numRects * 
        !            71:                                             sizeof(BoxRec));
        !            72: 
        !            73:     if (!pboxClippedBase)
        !            74:        return;
        !            75: 
        !            76:     prect = prectInit;
        !            77:     if (pDrawable->type == DRAWABLE_WINDOW)
        !            78:     {
        !            79:        xorg = ((WindowPtr)pDrawable)->absCorner.x;
        !            80:        yorg = ((WindowPtr)pDrawable)->absCorner.y;
        !            81:         prect = prectInit;
        !            82:        n = nrectFill;
        !            83:         while(n--)
        !            84:         {
        !            85:            prect->x += xorg;
        !            86:            prect->y += yorg;
        !            87:            prect++;
        !            88:         }
        !            89:     }
        !            90: 
        !            91:     prect = prectInit;
        !            92:     while (nrectFill--)
        !            93:     {
        !            94:        BoxRec box;
        !            95: 
        !            96:        if (prect->width <= 0 || prect->height <= 0)
        !            97:        {
        !            98:            prect++;
        !            99:            continue;
        !           100:        }
        !           101:        box.x1 = prect->x;
        !           102:        box.y1 = prect->y;
        !           103:        box.x2 = box.x1 + prect->width;
        !           104:        box.y2 = box.y1 + prect->height;
        !           105:        prect++;
        !           106: 
        !           107:        switch((*pGC->pScreen->RectIn)(prgnClip, &box))
        !           108:        {
        !           109:          case rgnOUT:
        !           110:            break;
        !           111:          case rgnIN:
        !           112:            (*pfn)(pDrawable, 1, &box, alu, ppix);
        !           113:            break;
        !           114:          case rgnPART:
        !           115:            pboxClipped = pboxClippedBase;
        !           116:            pbox = prgnClip->rects;
        !           117:            n = prgnClip->numRects;
        !           118: 
        !           119:            /* clip the rectangle to each box in the clip region
        !           120:               this is logically equivalent to calling Intersect()
        !           121:            */
        !           122:            while(n--)
        !           123:            {
        !           124:                pboxClipped->x1 = max(box.x1, pbox->x1);
        !           125:                pboxClipped->y1 = max(box.y1, pbox->y1);
        !           126:                pboxClipped->x2 = min(box.x2, pbox->x2);
        !           127:                pboxClipped->y2 = min(box.y2, pbox->y2);
        !           128:                pbox++;
        !           129: 
        !           130:                /* see if clipping left anything */
        !           131:                if(pboxClipped->x1 < pboxClipped->x2 && 
        !           132:                   pboxClipped->y1 < pboxClipped->y2)
        !           133:                {
        !           134:                    pboxClipped++;
        !           135:                }
        !           136:            }
        !           137:            (*pfn)(pDrawable, pboxClipped-pboxClippedBase, 
        !           138:                   pboxClippedBase, alu, ppix);
        !           139:            break;
        !           140:        }
        !           141:     }
        !           142:     DEALLOCATE_LOCAL(pboxClippedBase);
        !           143: }

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