301 lines
7.7 KiB
C
301 lines
7.7 KiB
C
/*****************************************************************************
|
|
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"
|
|
|
|
static XPoint *points;
|
|
static GC pgc;
|
|
|
|
static void
|
|
GenerateLines(XParms xp, Parms p, Bool ddashed)
|
|
{
|
|
int size;
|
|
int half; /* Half of width if wide line */
|
|
int i;
|
|
int rows; /* Number of rows filled in current column */
|
|
int x, y; /* Next point */
|
|
int xdir, ydir; /* Which direction x, y are going */
|
|
int bigxdir;
|
|
int x1 = 0, y1 = 0; /* offsets to compute next point from current */
|
|
int phase; /* how far into 0..4*(size_1) we are */
|
|
float phasef; /* how far we are in real numbers */
|
|
float phaseinc; /* how much to increment phasef at each segment */
|
|
int size4; /* 4 * size */
|
|
|
|
if(ddashed)
|
|
pgc = xp->ddfggc;
|
|
else
|
|
pgc = xp->fggc;
|
|
|
|
size = p->special;
|
|
size4 = 4 * (size+1);
|
|
half = (size + 19) / 20;
|
|
|
|
points = (XPoint *)malloc((p->objects+1) * sizeof(XPoint));
|
|
|
|
/* All this x, x1, x1inc, etc. stuff is to create a pattern that
|
|
(1) scans down the screen vertically
|
|
|
|
(2) rotates the endpoints through all possible orientations
|
|
|
|
(3) bounces off bottom and top of window as needed
|
|
|
|
(4) moves left or right at each bounce to make things less boring
|
|
*/
|
|
|
|
x = half;
|
|
y = half;
|
|
xdir = 1;
|
|
ydir = 1;
|
|
bigxdir = 1;
|
|
phasef = 0.0;
|
|
phaseinc = ((float)size4) / ((float)p->objects);
|
|
if (phaseinc < 1.0) phaseinc = 1.0;
|
|
rows = 0;
|
|
|
|
points[0].x = x;
|
|
points[0].y = y;
|
|
|
|
for (i = 1; i != (p->objects+1); i++) {
|
|
phase = phasef;
|
|
switch (phase / (size+1)) {
|
|
case 0:
|
|
x1 = size;
|
|
y1 = phase;
|
|
break;
|
|
|
|
case 1:
|
|
x1 = size - phase % (size+1);
|
|
y1 = size;
|
|
break;
|
|
|
|
case 2:
|
|
x1 = phase % (size+1);
|
|
y1 = size;
|
|
break;
|
|
|
|
case 3:
|
|
x1 = size;
|
|
y1 = size - phase % (size+1);
|
|
break;
|
|
} /* end switch */
|
|
|
|
/* Move down or up the screen */
|
|
y += (ydir * y1);
|
|
|
|
/* If off either top or bottom, backtrack to previous position and go
|
|
the other way instead. Also move in bigxdir if not already. */
|
|
rows++;
|
|
if (y < half || y >= (HEIGHT-half) || rows > MAXROWS) {
|
|
rows = 0;
|
|
if (bigxdir > 0) {
|
|
if (x + size < WIDTH - half) {
|
|
xdir = 1;
|
|
} else {
|
|
bigxdir = -1;
|
|
}
|
|
} else {
|
|
if (x - size > half) {
|
|
xdir = -1;
|
|
} else {
|
|
bigxdir = 1;
|
|
}
|
|
}
|
|
ydir = -ydir;
|
|
y += (2 * ydir * y1);
|
|
/* If still off top or bottom, we can't do the line we want.
|
|
This will happen infrequently if the window is not twice the
|
|
length of the line. So instead, let's draw a line that puts
|
|
the line after this approximately through the center of the
|
|
window. Since it is very unlikely that both x and y will
|
|
need such adjustment, line length (in pixels) should not
|
|
change...we just can't get the slope we want for this line. */
|
|
if (y < half) {
|
|
y = (HEIGHT - y1)/2;
|
|
ydir = 1;
|
|
} else if (y > (HEIGHT - half)) {
|
|
y = (HEIGHT + y1)/2;
|
|
ydir = -1;
|
|
}
|
|
}
|
|
|
|
/* Move x left or right by x1 */
|
|
x += (xdir * x1);
|
|
xdir = -xdir;
|
|
/* Again, if we are off the bottom then we can't really draw the line
|
|
we want. */
|
|
if (x < half) {
|
|
x = (WIDTH - x1)/2;
|
|
xdir = 1;
|
|
} else if (x > (WIDTH - half)) {
|
|
x = (WIDTH + x1)/2;
|
|
xdir = -1;
|
|
}
|
|
points[i].x = x;
|
|
points[i].y = y;
|
|
|
|
/* Increment phasef */
|
|
phasef += phaseinc;
|
|
if (phasef >= size4) phasef -= size4;
|
|
|
|
}
|
|
}
|
|
|
|
int
|
|
InitLines(XParms xp, Parms p, int reps)
|
|
{
|
|
GenerateLines(xp, p, False);
|
|
return reps;
|
|
}
|
|
|
|
static int
|
|
GenerateWideLines(XParms xp, Parms p, int reps, Bool ddashed)
|
|
{
|
|
int size;
|
|
|
|
GenerateLines(xp, p, ddashed);
|
|
|
|
size = p->special;
|
|
if(ddashed) {
|
|
XSetLineAttributes(xp->d, xp->ddbggc, (int) ((size + 9) / 10),
|
|
LineSolid, CapRound, JoinRound);
|
|
XSetLineAttributes(xp->d, xp->ddfggc, (int) ((size + 9) / 10),
|
|
LineSolid, CapRound, JoinRound);
|
|
}
|
|
else {
|
|
XSetLineAttributes(xp->d, xp->bggc, (int) ((size + 9) / 10),
|
|
LineSolid, CapRound, JoinRound);
|
|
XSetLineAttributes(xp->d, xp->fggc, (int) ((size + 9) / 10),
|
|
LineSolid, CapRound, JoinRound);
|
|
}
|
|
|
|
return reps;
|
|
}
|
|
|
|
int
|
|
InitWideLines(XParms xp, Parms p, int reps)
|
|
{
|
|
return GenerateWideLines(xp, p, reps, False);
|
|
}
|
|
|
|
int
|
|
InitDashedLines(XParms xp, Parms p, int reps)
|
|
{
|
|
char dashes[2];
|
|
|
|
GenerateLines(xp, p, False);
|
|
|
|
/* Modify GCs to draw dashed */
|
|
XSetLineAttributes(xp->d, xp->bggc, 0, LineOnOffDash, CapButt, JoinMiter);
|
|
XSetLineAttributes(xp->d, xp->fggc, 0, LineOnOffDash, CapButt, JoinMiter);
|
|
dashes[0] = 3; dashes[1] = 2;
|
|
XSetDashes(xp->d, xp->fggc, 0, dashes, 2);
|
|
XSetDashes(xp->d, xp->bggc, 0, dashes, 2);
|
|
return reps;
|
|
}
|
|
|
|
int
|
|
InitWideDashedLines(XParms xp, Parms p, int reps)
|
|
{
|
|
int size;
|
|
XGCValues gcv;
|
|
char dashes[2];
|
|
|
|
(void)GenerateWideLines(xp, p, reps, False);
|
|
size = p->special;
|
|
size = (size + 9) / 10;
|
|
|
|
/* Modify GCs to draw dashed */
|
|
dashes[0] = 2*size; dashes[1] = 2*size;
|
|
gcv.line_style = LineOnOffDash;
|
|
XChangeGC(xp->d, xp->fggc, GCLineStyle, &gcv);
|
|
XChangeGC(xp->d, xp->bggc, GCLineStyle, &gcv);
|
|
XSetDashes(xp->d, xp->fggc, 0, dashes, 2);
|
|
XSetDashes(xp->d, xp->bggc, 0, dashes, 2);
|
|
return reps;
|
|
}
|
|
|
|
int
|
|
InitDoubleDashedLines(XParms xp, Parms p, int reps)
|
|
{
|
|
char dashes[2];
|
|
|
|
GenerateLines(xp, p, True);
|
|
|
|
/* Modify GCs to draw dashed */
|
|
XSetLineAttributes(xp->d, xp->ddbggc, 0, LineDoubleDash, CapButt, JoinMiter);
|
|
XSetLineAttributes(xp->d, xp->ddfggc, 0, LineDoubleDash, CapButt, JoinMiter);
|
|
dashes[0] = 3; dashes[1] = 2;
|
|
XSetDashes(xp->d, xp->ddfggc, 0, dashes, 2);
|
|
XSetDashes(xp->d, xp->ddbggc, 0, dashes, 2);
|
|
return reps;
|
|
}
|
|
|
|
int
|
|
InitWideDoubleDashedLines(XParms xp, Parms p, int reps)
|
|
{
|
|
int size;
|
|
XGCValues gcv;
|
|
char dashes[2];
|
|
|
|
(void)GenerateWideLines(xp, p, reps, True);
|
|
size = p->special;
|
|
size = (size + 9) / 10;
|
|
|
|
/* Modify GCs to draw dashed */
|
|
dashes[0] = 2*size; dashes[1] = 2*size;
|
|
gcv.line_style = LineDoubleDash;
|
|
XChangeGC(xp->d, xp->ddfggc, GCLineStyle, &gcv);
|
|
XChangeGC(xp->d, xp->ddbggc, GCLineStyle, &gcv);
|
|
XSetDashes(xp->d, xp->ddfggc, 0, dashes, 2);
|
|
XSetDashes(xp->d, xp->ddbggc, 0, dashes, 2);
|
|
return reps;
|
|
}
|
|
|
|
void
|
|
DoLines(XParms xp, Parms p, int reps)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i != reps; i++)
|
|
{
|
|
XDrawLines(xp->d, xp->w, pgc, points, p->objects+1, CoordModeOrigin);
|
|
if (pgc == xp->ddbggc)
|
|
pgc = xp->ddfggc;
|
|
else if(pgc == xp->ddfggc)
|
|
pgc = xp->ddbggc;
|
|
else if (pgc == xp->bggc)
|
|
pgc = xp->fggc;
|
|
else
|
|
pgc = xp->bggc;
|
|
CheckAbort ();
|
|
}
|
|
}
|
|
|
|
void
|
|
EndLines(XParms xp, Parms p)
|
|
{
|
|
free(points);
|
|
}
|
|
|