1 files changed, 111 insertions, 0 deletions
diff --git a/do_traps.c b/do_traps.c
new file mode 100644
index 0000000..5605ff3
--- /dev/null
+++ b/do_traps.c
@@ -0,0 +1,111 @@
+/* $Xorg: do_traps.c,v 1.3 2000/08/17 19:54:10 cpqbld Exp $ */
+/*****************************************************************************
+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);
+}
+