home *** CD-ROM | disk | FTP | other *** search
- /*****************************************************************************
- Copyright 1988, 1989 by Digital Equipment Corporation, Maynard, Massachusetts.
-
- All Rights Reserved
-
- Permission to use, copy, modify, and distribute this software and its
- documentation for any purpose and without fee is hereby granted,
- provided that the above copyright notice appear in all copies and that
- both that copyright notice and this permission notice appear in
- supporting documentation, and that the name of Digital not be
- used in advertising or publicity pertaining to distribution of the
- software without specific, written prior permission.
-
- DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
- ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
- DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
- ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
- ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- SOFTWARE.
-
- ******************************************************************************/
-
- #include "x11perf.h"
- #include "bitmaps.h"
-
- #define NUM_POINTS 4 /* 4 points to a trapezoid */
- static XPoint *points;
- static GC pgc;
-
- int InitTrapezoids(xp, p, reps)
- XParms xp;
- Parms p;
- int reps;
- {
- int i, numPoints;
- int rows;
- int x, y;
- int size, skew;
- XPoint *curPoint;
-
- pgc = xp->fggc;
-
- size = p->special;
- numPoints = (p->objects) * NUM_POINTS;
- points = (XPoint *)malloc(numPoints * sizeof(XPoint));
- curPoint = points;
- x = size;
- y = 0;
- rows = 0;
- skew = size;
-
- for (i = 0; i != p->objects; i++, curPoint += NUM_POINTS) {
- curPoint[0].x = x - skew;
- curPoint[0].y = y;
- curPoint[1].x = x - skew + size;
- curPoint[1].y = y;
- curPoint[2].x = x + skew;
- curPoint[2].y = y + size;
- curPoint[3].x = x + skew - size;
- curPoint[3].y = y + size;
-
- skew--;
- if (skew < 0) skew = size;
-
- y += size;
- rows++;
- if (y + size > HEIGHT || rows == MAXROWS) {
- rows = 0;
- y = 0;
- x += 2 * size;
- if (x + size > WIDTH) {
- x = size;
- }
- }
- }
-
- SetFillStyle(xp, p);
- return reps;
- }
-
- void DoTrapezoids(xp, p, reps)
- XParms xp;
- Parms p;
- int reps;
- {
- int i, j;
- XPoint *curPoint;
-
- for (i = 0; i != reps; i++) {
- curPoint = points;
- for (j = 0; j != p->objects; j++) {
- XFillPolygon(xp->d, xp->w, pgc, curPoint, NUM_POINTS, Convex,
- CoordModeOrigin);
- curPoint += NUM_POINTS;
- }
- if (pgc == xp->bggc)
- pgc = xp->fggc;
- else
- pgc = xp->bggc;
- }
- }
-
- void EndTrapezoids(xp, p)
- XParms xp;
- Parms p;
- {
- free(points);
- }
-
-