-/* -*- Mode: C; tab-width: 4 -*-
- * laser --- draws swinging laser beams.
- */
+/* -*- Mode: C; tab-width: 4 -*- */
+/* laser --- spinning lasers */
+
#if !defined( lint ) && !defined( SABER )
-static const char sccsid[] = "@(#)laser.c 4.00 97/01/01 xlockmore";
+static const char sccsid[] = "@(#)laser.c 5.00 2000/11/01 xlockmore";
+
#endif
-/* Copyright (c) 1995 Pascal Pensa <pensa@aurora.unice.fr>
+/*-
+ * Copyright (c) 1995 Pascal Pensa <pensa@aurora.unice.fr>
*
- * Permission to use, copy, modify, distribute, and sell this software and its
- * documentation for any purpose is hereby granted without fee, provided that
- * the above copyright notice appear in all copies and that both that
- * copyright notice and this permission notice appear in supporting
- * documentation. No representations are made about the suitability of this
- * software for any purpose. It is provided "as is" without express or
- * implied warranty.
+ * 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.
+ *
+ * This file is provided AS IS with no warranties of any kind. The author
+ * shall have no liability with respect to the infringement of copyrights,
+ * trade secrets or any patents by this file or any part thereof. In no
+ * event will the author be liable for any lost revenue or profits or
+ * other special, indirect and consequential damages.
*
* Revision History:
- * 10-May-97: jwz@jwz.org: turned into a standalone program.
+ * 01-Nov-2000: Allocation checks
+ * 10-May-1997: Compatible with xscreensaver
+ * 1995: Written.
*/
#ifdef STANDALONE
-# define PROGCLASS "Laser"
-# define HACK_INIT init_laser
-# define HACK_DRAW draw_laser
-# define laser_opts xlockmore_opts
-# define DEFAULTS "*count: 10 \n" \
- "*cycles: 200 \n" \
- "*delay: 40000 \n" \
- "*ncolors: 64 \n"
-# define SMOOTH_COLORS
-# include "xlockmore.h" /* from the xscreensaver distribution */
-#else /* !STANDALONE */
-# include "xlock.h" /* from the xlockmore distribution */
-#endif /* !STANDALONE */
-
-ModeSpecOpt laser_opts = {
- 0, NULL, 0, NULL, NULL };
+#define MODE_laser
+#define PROGCLASS "Laser"
+#define HACK_INIT init_laser
+#define HACK_DRAW draw_laser
+#define laser_opts xlockmore_opts
+#define DEFAULTS "*delay: 40000 \n" \
+ "*count: 10 \n" \
+ "*cycles: 200 \n" \
+ "*ncolors: 64 \n"
+#define BRIGHT_COLORS
+#include "xlockmore.h" /* in xscreensaver distribution */
+#else /* STANDALONE */
+#include "xlock.h" /* in xlockmore distribution */
+#endif /* STANDALONE */
+
+#ifdef MODE_laser
+
+ModeSpecOpt laser_opts =
+{0, (XrmOptionDescRec *) NULL, 0, (argtype *) NULL, (OptionStruct *) NULL};
+
+#ifdef USE_MODULES
+ModStruct laser_description =
+{"laser", "init_laser", "draw_laser", "release_laser",
+ "refresh_laser", "init_laser", (char *) NULL, &laser_opts,
+ 20000, -10, 200, 1, 64, 1.0, "",
+ "Shows spinning lasers", 0, NULL};
+
+#endif
#define MINREDRAW 3 /* Number of redrawn on each frame */
#define MAXREDRAW 8
#define COLORSTEP 2 /* Laser color step */
-#define RANGE_RAND(min,max) ((min) + LRAND() % ((max) - (min)))
+#define RANGE_RAND(min,max) (int) ((min) + LRAND() % ((max) - (min)))
typedef enum {
TOP, RIGHT, BOTTOM, LEFT
laserstruct *laser;
} lasersstruct;
-static lasersstruct *lasers = NULL;
+static lasersstruct *lasers = (lasersstruct *) NULL;
+static void
+free_laser(Display *display, lasersstruct *lp)
+{
+ if (lp->laser != NULL) {
+ (void) free((void *) lp->laser);
+ lp->laser = (laserstruct *) NULL;
+ }
+ if (lp->stippledGC != None) {
+ XFreeGC(display, lp->stippledGC);
+ lp->stippledGC = None;
+ }
+}
void
init_laser(ModeInfo * mi)
{
+ Display *display = MI_DISPLAY(mi);
int i, c = 0;
lasersstruct *lp;
}
lp = &lasers[MI_SCREEN(mi)];
- lp->width = MI_WIN_WIDTH(mi);
- lp->height = MI_WIN_HEIGHT(mi);
+ lp->width = MI_WIDTH(mi);
+ lp->height = MI_HEIGHT(mi);
lp->time = 0;
- lp->ln = MI_BATCHCOUNT(mi);
+ lp->ln = MI_COUNT(mi);
if (lp->ln < -MINLASER) {
/* if lp->ln is random ... the size can change */
if (lp->laser != NULL) {
(void) free((void *) lp->laser);
- lp->laser = NULL;
+ lp->laser = (laserstruct *) NULL;
}
lp->ln = NRAND(-lp->ln - MINLASER + 1) + MINLASER;
} else if (lp->ln < MINLASER)
lp->ln = MINLASER;
- if (!lp->laser) {
- lp->laser = (laserstruct *) malloc(lp->ln * sizeof (laserstruct));
+ if (lp->laser == NULL) {
+ if ((lp->laser = (laserstruct *) malloc(lp->ln *
+ sizeof (laserstruct))) == NULL) {
+ free_laser(display, lp);
+ return;
+ }
}
- if (lp->stippledGC == NULL) {
+ if (lp->stippledGC == None) {
XGCValues gcv;
- gcv.foreground = MI_WIN_WHITE_PIXEL(mi);
- gcv.background = MI_WIN_BLACK_PIXEL(mi);
- lp->gcv_black.foreground = MI_WIN_BLACK_PIXEL(mi);
- lp->stippledGC = XCreateGC(MI_DISPLAY(mi), MI_WINDOW(mi),
- GCForeground | GCBackground, &gcv);
+ gcv.foreground = MI_WHITE_PIXEL(mi);
+ gcv.background = MI_BLACK_PIXEL(mi);
+ lp->gcv_black.foreground = MI_BLACK_PIXEL(mi);
+ if ((lp->stippledGC = XCreateGC(display, MI_WINDOW(mi),
+ GCForeground | GCBackground, &gcv)) == None) {
+ free_laser(display, lp);
+ return;
+ }
}
- XClearWindow(MI_DISPLAY(mi), MI_WINDOW(mi));
+ MI_CLEARWINDOW(mi);
if (MINDIST < lp->width - MINDIST)
lp->cx = RANGE_RAND(MINDIST, lp->width - MINDIST);
l->by = NRAND(lp->height);
}
- l->dir = LRAND() & 1;
+ l->dir = (int) (LRAND() & 1);
l->speed = ((RANGE_RAND(MINSPEED, MAXSPEED) * lp->width) / 1000) + 1;
if (MI_NPIXELS(mi) > 2) {
l->gcv.foreground = MI_PIXEL(mi, c);
c = (c + COLORSTEP) % MI_NPIXELS(mi);
} else
- l->gcv.foreground = MI_WIN_WHITE_PIXEL(mi);
+ l->gcv.foreground = MI_WHITE_PIXEL(mi);
}
}
void
draw_laser(ModeInfo * mi)
{
- lasersstruct *lp = &lasers[MI_SCREEN(mi)];
int i;
+ lasersstruct *lp;
+ if (lasers == NULL)
+ return;
+ lp = &lasers[MI_SCREEN(mi)];
+ if (lp->laser == NULL)
+ return;
+
+ MI_IS_DRAWN(mi) = True;
for (i = 0; i < lp->lr; i++)
draw_laser_once(mi);
if (lasers != NULL) {
int screen;
- for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++) {
- lasersstruct *lp = &lasers[screen];
-
- if (lp->laser != NULL)
- (void) free((void *) lp->laser);
- if (lp->stippledGC != NULL)
- XFreeGC(MI_DISPLAY(mi), lp->stippledGC);
- }
+ for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++)
+ free_laser(MI_DISPLAY(mi), &lasers[screen]);
(void) free((void *) lasers);
- lasers = NULL;
+ lasers = (lasersstruct *) NULL;
}
}
void
refresh_laser(ModeInfo * mi)
{
- /* Do nothing, it will refresh by itself */
+ MI_CLEARWINDOW(mi);
}
+
+#endif /* MODE_laser */
projects / xscreensaver / blobdiff