-/* -*- Mode: C; tab-width: 4 -*-
- * hop --- real plane fractals.
- */
-#if !defined( lint ) && !defined( SABER )
-static const char sccsid[] = "@(#)hop.c 4.02 97/04/01 xlockmore";
+/* -*- Mode: C; tab-width: 4 -*- */
+/* hop --- real plane fractals */
+
+#if 0
+static const char sccsid[] = "@(#)hop.c 5.00 2000/11/01 xlockmore";
#endif
-/* Copyright (c) 1988-91 by Patrick J. Naughton.
+/*-
+ * Copyright (c) 1991 by Patrick J. Naughton.
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted,
* other special, indirect and consequential damages.
*
* Revision History:
- * Changes of David Bagley <bagleyd@bigfoot.com>
- * 24-Jun-97: EJK and RR functions stolen from xmartin2.2
- * Ed Kubaitis <ejk@ux2.cso.uiuc.edu> ejk functions and xmartin
- * Renaldo Recuerdo rr function, generalized exponent version
+ * Changes in xlockmore distribution
+ * 01-Nov-2000: Allocation checks
+ * 24-Jun-1997: EJK and RR functions stolen from xmartin2.2
+ * Ed Kubaitis <ejk@ux2.cso.uiuc.edu> ejk functions and xmartin
+ * Renaldo Recuerdo rr function, generalized exponent version
* of the Barry Martin's square root function
- * 10-May-97: jwz@jwz.org: ported from xlockmore 4.03a10 to be a
- * standalone program and thus usable with xscreensaver
- * (I threw away my 1992 port and started over.)
- * 27-Jul-95: added Peter de Jong's hop from Scientific American
- * July 87 p. 111. Sometimes they are amazing but there are a
- * few duds (I did not see a pattern in the parameters).
- * 29-Mar-95: changed name from hopalong to hop
- * 09-Dec-94: added Barry Martin's sine hop
- *
- * (12-Aug-92: jwz@lucid.com: made xlock version run standalone.)
- *
- * Changes of Patrick J. Naughton
- * 29-Oct-90: fix bad (int) cast.
- * 29-Jul-90: support for multiple screens.
- * 08-Jul-90: new timing and colors and new algorithm for fractals.
- * 15-Dec-89: Fix for proper skipping of {White,Black}Pixel() in colors.
- * 08-Oct-89: Fixed long standing typo bug in RandomInitHop();
- * Fixed bug in memory allocation in init_hop();
- * Moved seconds() to an extern.
- * Got rid of the % mod since .mod is slow on a sparc.
- * 20-Sep-89: Lint.
- * 31-Aug-88: Forked from xlock.c for modularity.
- * 23-Mar-88: Coded HOPALONG routines from Scientific American Sept. 86 p. 14.
- * Hopalong was attributed to Barry Martin of Aston University
- * (Birmingham, England)
+ * 10-May-1997: Compatible with xscreensaver
+ * 27-Jul-1995: added Peter de Jong's hop from Scientific American
+ * July 87 p. 111. Sometimes they are amazing but there are a
+ * few duds (I did not see a pattern in the parameters).
+ * 29-Mar-1995: changed name from hopalong to hop
+ * 09-Dec-1994: added Barry Martin's sine hop
+ * Changes in original xlock
+ * 29-Oct-1990: fix bad (int) cast.
+ * 29-Jul-1990: support for multiple screens.
+ * 08-Jul-1990: new timing and colors and new algorithm for fractals.
+ * 15-Dec-1989: Fix for proper skipping of {White,Black}Pixel() in colors.
+ * 08-Oct-1989: Fixed long standing typo bug in RandomInitHop();
+ * Fixed bug in memory allocation in init_hop();
+ * Moved seconds() to an extern.
+ * Got rid of the % mod since .mod is slow on a sparc.
+ * 20-Sep-1989: Lint.
+ * 31-Aug-1988: Forked from xlock.c for modularity.
+ * 23-Mar-1988: Coded HOPALONG routines from Scientific American Sept. 86 p. 14.
+ * Hopalong was attributed to Barry Martin of Aston University
+ * (Birmingham, England)
*/
+
#ifdef STANDALONE
-# define PROGCLASS "Hopalong"
-# define HACK_INIT init_hop
-# define HACK_DRAW draw_hop
-# define HACK_FREE release_hop
-# define hop_opts xlockmore_opts
-# define DEFAULTS "*delay: 10000 \n" \
- "*count: 1000 \n" \
- "*cycles: 2500 \n" \
- "*ncolors: 200 \n"
-# define SMOOTH_COLORS
-# include "xlockmore.h" /* from the xscreensaver distribution */
-# include "erase.h"
-#else /* !STANDALONE */
-# include "xlock.h" /* from the xlockmore distribution */
-#endif /* !STANDALONE */
+#define MODE_hop
+#define PROGCLASS "Hop"
+#define HACK_INIT init_hop
+#define HACK_DRAW draw_hop
+#define hop_opts xlockmore_opts
+#define DEFAULTS "*delay: 10000 \n" \
+ "*count: 1000 \n" \
+ "*cycles: 2500 \n" \
+ "*ncolors: 200 \n"
+#define SMOOTH_COLORS
+#include "xlockmore.h" /* in xscreensaver distribution */
+#include "erase.h"
+#else /* STANDALONE */
+#include "xlock.h" /* in xlockmore distribution */
+
+#endif /* STANDALONE */
+
+#ifdef MODE_hop
#define DEF_MARTIN "False"
#define DEF_POPCORN "False"
static XrmOptionDescRec opts[] =
{
- {"-martin", ".hop.martin", XrmoptionNoArg, (caddr_t) "on"},
- {"+martin", ".hop.martin", XrmoptionNoArg, (caddr_t) "off"},
- {"-popcorn", ".hop.popcorn", XrmoptionNoArg, (caddr_t) "on"},
- {"+popcorn", ".hop.popcorn", XrmoptionNoArg, (caddr_t) "off"},
- {"-ejk1", ".hop.ejk1", XrmoptionNoArg, (caddr_t) "on"},
- {"+ejk1", ".hop.ejk1", XrmoptionNoArg, (caddr_t) "off"},
- {"-ejk2", ".hop.ejk2", XrmoptionNoArg, (caddr_t) "on"},
- {"+ejk2", ".hop.ejk2", XrmoptionNoArg, (caddr_t) "off"},
- {"-ejk3", ".hop.ejk3", XrmoptionNoArg, (caddr_t) "on"},
- {"+ejk3", ".hop.ejk3", XrmoptionNoArg, (caddr_t) "off"},
- {"-ejk4", ".hop.ejk4", XrmoptionNoArg, (caddr_t) "on"},
- {"+ejk4", ".hop.ejk4", XrmoptionNoArg, (caddr_t) "off"},
- {"-ejk5", ".hop.ejk5", XrmoptionNoArg, (caddr_t) "on"},
- {"+ejk5", ".hop.ejk5", XrmoptionNoArg, (caddr_t) "off"},
- {"-ejk6", ".hop.ejk6", XrmoptionNoArg, (caddr_t) "on"},
- {"+ejk6", ".hop.ejk6", XrmoptionNoArg, (caddr_t) "off"},
- {"-rr", ".hop.rr", XrmoptionNoArg, (caddr_t) "on"},
- {"+rr", ".hop.rr", XrmoptionNoArg, (caddr_t) "off"},
- {"-jong", ".hop.jong", XrmoptionNoArg, (caddr_t) "on"},
- {"+jong", ".hop.jong", XrmoptionNoArg, (caddr_t) "off"},
- {"-sine", ".hop.sine", XrmoptionNoArg, (caddr_t) "on"},
- {"+sine", ".hop.sine", XrmoptionNoArg, (caddr_t) "off"}
+ {"-martin", ".hop.martin", XrmoptionNoArg, "on"},
+ {"+martin", ".hop.martin", XrmoptionNoArg, "off"},
+ {"-popcorn", ".hop.popcorn", XrmoptionNoArg, "on"},
+ {"+popcorn", ".hop.popcorn", XrmoptionNoArg, "off"},
+ {"-ejk1", ".hop.ejk1", XrmoptionNoArg, "on"},
+ {"+ejk1", ".hop.ejk1", XrmoptionNoArg, "off"},
+ {"-ejk2", ".hop.ejk2", XrmoptionNoArg, "on"},
+ {"+ejk2", ".hop.ejk2", XrmoptionNoArg, "off"},
+ {"-ejk3", ".hop.ejk3", XrmoptionNoArg, "on"},
+ {"+ejk3", ".hop.ejk3", XrmoptionNoArg, "off"},
+ {"-ejk4", ".hop.ejk4", XrmoptionNoArg, "on"},
+ {"+ejk4", ".hop.ejk4", XrmoptionNoArg, "off"},
+ {"-ejk5", ".hop.ejk5", XrmoptionNoArg, "on"},
+ {"+ejk5", ".hop.ejk5", XrmoptionNoArg, "off"},
+ {"-ejk6", ".hop.ejk6", XrmoptionNoArg, "on"},
+ {"+ejk6", ".hop.ejk6", XrmoptionNoArg, "off"},
+ {"-rr", ".hop.rr", XrmoptionNoArg, "on"},
+ {"+rr", ".hop.rr", XrmoptionNoArg, "off"},
+ {"-jong", ".hop.jong", XrmoptionNoArg, "on"},
+ {"+jong", ".hop.jong", XrmoptionNoArg, "off"},
+ {"-sine", ".hop.sine", XrmoptionNoArg, "on"},
+ {"+sine", ".hop.sine", XrmoptionNoArg, "off"}
};
static argtype vars[] =
{
- {(caddr_t *) & martin, "martin", "Martin", DEF_MARTIN, t_Bool},
- {(caddr_t *) & popcorn, "popcorn", "Popcorn", DEF_POPCORN, t_Bool},
- {(caddr_t *) & ejk1, "ejk1", "EJK1", DEF_EJK1, t_Bool},
- {(caddr_t *) & ejk2, "ejk2", "EJK2", DEF_EJK2, t_Bool},
- {(caddr_t *) & ejk3, "ejk3", "EJK3", DEF_EJK3, t_Bool},
- {(caddr_t *) & ejk4, "ejk4", "EJK4", DEF_EJK4, t_Bool},
- {(caddr_t *) & ejk5, "ejk5", "EJK5", DEF_EJK5, t_Bool},
- {(caddr_t *) & ejk6, "ejk6", "EJK6", DEF_EJK6, t_Bool},
- {(caddr_t *) & rr, "rr", "RR", DEF_RR, t_Bool},
- {(caddr_t *) & jong, "jong", "Jong", DEF_JONG, t_Bool},
- {(caddr_t *) & sine, "sine", "Sine", DEF_SINE, t_Bool}
+ {&martin, "martin", "Martin", DEF_MARTIN, t_Bool},
+ {&popcorn, "popcorn", "Popcorn", DEF_POPCORN, t_Bool},
+ {&ejk1, "ejk1", "EJK1", DEF_EJK1, t_Bool},
+ {&ejk2, "ejk2", "EJK2", DEF_EJK2, t_Bool},
+ {&ejk3, "ejk3", "EJK3", DEF_EJK3, t_Bool},
+ {&ejk4, "ejk4", "EJK4", DEF_EJK4, t_Bool},
+ {&ejk5, "ejk5", "EJK5", DEF_EJK5, t_Bool},
+ {&ejk6, "ejk6", "EJK6", DEF_EJK6, t_Bool},
+ {&rr, "rr", "RR", DEF_RR, t_Bool},
+ {&jong, "jong", "Jong", DEF_JONG, t_Bool},
+ {&sine, "sine", "Sine", DEF_SINE, t_Bool}
};
static OptionStruct desc[] =
{
{"-/+ejk4", "turn on/off ejk4 format"},
{"-/+ejk5", "turn on/off ejk5 format"},
{"-/+ejk6", "turn on/off ejk6 format"},
- {"-/+rr", "turn on/off rr format"},
+ {"-/+rr", "turn on/off rr format"},
{"-/+jong", "turn on/off jong format"},
{"-/+sine", "turn on/off sine format"}
};
#ifdef USE_MODULES
ModStruct hop_description =
{"hop", "init_hop", "draw_hop", "release_hop",
- "refresh_hop", "init_hop", NULL, &hop_opts,
+ "refresh_hop", "init_hop", (char *) NULL, &hop_opts,
10000, 1000, 2500, 1, 64, 1.0, "",
"Shows real plane iterated fractals", 0, NULL};
XPoint *pointBuffer; /* pointer for XDrawPoints */
} hopstruct;
-static hopstruct *hops = NULL;
+static hopstruct *hops = (hopstruct *) NULL;
void
init_hop(ModeInfo * mi)
{
Display *display = MI_DISPLAY(mi);
GC gc = MI_GC(mi);
- hopstruct *hp;
double range;
+ hopstruct *hp;
if (hops == NULL) {
if ((hops = (hopstruct *) calloc(MI_NUM_SCREENS(mi),
hp->pix = NRAND(MI_NPIXELS(mi));
hp->bufsize = MI_COUNT(mi);
- if (!hp->pointBuffer)
- hp->pointBuffer = (XPoint *) malloc(hp->bufsize * sizeof (XPoint));
+ if (hp->pointBuffer == NULL) {
+ if ((hp->pointBuffer = (XPoint *) malloc(hp->bufsize *
+ sizeof (XPoint))) == NULL)
+ return;
+ }
MI_CLEARWINDOW(mi);
void
draw_hop(ModeInfo * mi)
{
- hopstruct *hp = &hops[MI_SCREEN(mi)];
double oldj, oldi;
- XPoint *xp = hp->pointBuffer;
- int k = hp->bufsize;
+ XPoint *xp;
+ int k;
+ hopstruct *hp;
- MI_IS_DRAWN(mi) = True;
+ if (hops == NULL)
+ return;
+ hp = &hops[MI_SCREEN(mi)];
+ if (hp->pointBuffer == NULL)
+ return;
+ xp = hp->pointBuffer;
+ k = hp->bufsize;
+ MI_IS_DRAWN(mi) = True;
hp->inc++;
if (MI_NPIXELS(mi) > 2) {
XSetForeground(MI_DISPLAY(mi), MI_GC(mi), MI_PIXEL(mi, hp->pix));
for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++) {
hopstruct *hp = &hops[screen];
- if (hp->pointBuffer)
+ if (hp->pointBuffer != NULL)
(void) free((void *) hp->pointBuffer);
}
-
(void) free((void *) hops);
- hops = NULL;
+ hops = (hopstruct *) NULL;
}
}
{
MI_CLEARWINDOW(mi);
}
+
+#endif /* MODE_hop */
projects / xscreensaver / blobdiff