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Annotation of researchv9/X11/src/X.V11R1/lib/X/XDrLine.c, revision 1.1

1.1     ! root        1: #include "copyright.h"
        !             2: 
        !             3: /* $Header: XDrLine.c,v 11.10 87/09/11 08:09:53 toddb Exp $ */
        !             4: /* Copyright    Massachusetts Institute of Technology    1986  */
        !             5: 
        !             6: #include "Xlibint.h"
        !             7: 
        !             8: /* precompute the maximum size of batching request allowed */
        !             9: 
        !            10: static int size = sizeof(xPolySegmentReq) + EPERBATCH * sizeof(xSegment);
        !            11: 
        !            12: XDrawLine (dpy, d, gc, x1, y1, x2, y2)
        !            13:     register Display *dpy;
        !            14:     Drawable d;
        !            15:     GC gc;
        !            16:     int x1, y1, x2, y2;
        !            17: {
        !            18:     register xSegment *segment;
        !            19:     LockDisplay(dpy);
        !            20:     FlushGC(dpy, gc);
        !            21:     {
        !            22:     register xPolySegmentReq *req = (xPolySegmentReq *) dpy->last_req;
        !            23:     /* if same as previous request, with same drawable, batch requests */
        !            24:     if (
        !            25:           (req->reqType == X_PolySegment)
        !            26:        && (req->drawable == d)
        !            27:        && (req->gc == gc->gid)
        !            28:        && ((dpy->bufptr + sizeof (xSegment)) <= dpy->bufmax)
        !            29:        && (((char *)dpy->bufptr - (char *)req) < size) ) {
        !            30:          segment = (xSegment *) dpy->bufptr;
        !            31:         req->length += sizeof (xSegment) >> 2;
        !            32:         dpy->bufptr += sizeof (xSegment);
        !            33:         }
        !            34: 
        !            35:     else {
        !            36:        GetReqExtra (PolySegment, sizeof(xSegment), req);
        !            37:        req->drawable = d;
        !            38:        req->gc = gc->gid;
        !            39:        segment = (xSegment *) (req + 1);
        !            40:        }
        !            41: 
        !            42:     segment->x1 = x1;
        !            43:     segment->y1 = y1;
        !            44:     segment->x2 = x2;
        !            45:     segment->y2 = y2;
        !            46:     UnlockDisplay(dpy);
        !            47:     SyncHandle();
        !            48:     }
        !            49: }
        !            50: 

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