-/* -*- Mode: C; tab-width: 4 -*-
- * fadeplot.c --- some easy plotting stuff, by Bas van Gaalen, Holland, PD
- */
+/* -*- Mode: C; tab-width: 4 -*- */
+/* fadeplot --- a fading plot of sine squared */
+
#if !defined( lint ) && !defined( SABER )
-static const char sccsid[] = "@(#)fadeplot.c 4.04 97/07/26 xlockmore";
+static const char sccsid[] = "@(#)fadeplot.c 5.00 2000/11/01 xlockmore";
+
#endif
-/* Converted for xlock by Charles Vidal
- * See xlock.c for copying information.
+/*-
+ * Some easy plotting stuff, by Bas van Gaalen, Holland, PD
+ *
+ * Copyright (c) 1996 by Charles Vidal
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted,
* 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.
- */
-
-/*-
- 1) Not random enough, i.e. always same starting position.
- 2) Needs to be less flashy
+ *
+ * Revision History:
+ * 01-Nov-2000: Allocation checks
+ * 10-May-1997: Compatible with screensaver
+ * 1996: Written by Charles Vidal based on work by Bas van Gaalen
*/
#ifdef STANDALONE
-# define PROGCLASS "Fadeplot"
-# define HACK_INIT init_fadeplot
-# define HACK_DRAW draw_fadeplot
-# define fadeplot_opts xlockmore_opts
-# define DEFAULTS "*count: 10 \n" \
- "*delay: 30000 \n" \
- "*cycles: 1500 \n" \
- "*ncolors: 64 \n"
-# define BRIGHT_COLORS
-# define UNIFORM_COLORS
-# include "xlockmore.h" /* from the xscreensaver distribution */
+#define MODE_fadeplot
+#define PROGCLASS "Fadeplot"
+#define HACK_INIT init_fadeplot
+#define HACK_DRAW draw_fadeplot
+#define fadeplot_opts xlockmore_opts
+#define DEFAULTS "*delay: 30000 \n" \
+ "*count: 10 \n" \
+ "*cycles: 1500 \n" \
+ "*ncolors: 64 \n"
+#define BRIGHT_COLORS
+#define UNIFORM_COLORS
+#include "xlockmore.h" /* in xscreensaver distribution */
#else /* STANDALONE */
-# include "xlock.h" /* from the xlockmore distribution */
+#include "xlock.h" /* in xlockmore distribution */
+
#endif /* STANDALONE */
-ModeSpecOpt fadeplot_opts = {
- 0, NULL, 0, NULL, NULL };
+#ifdef MODE_fadeplot
+
+ModeSpecOpt fadeplot_opts =
+{0, (XrmOptionDescRec *) NULL, 0, (argtype *) NULL, (OptionStruct *) NULL};
+
+#ifdef USE_MODULES
+ModStruct fadeplot_description =
+{"fadeplot", "init_fadeplot", "draw_fadeplot", "release_fadeplot",
+ "refresh_fadeplot", "init_fadeplot", (char *) NULL, &fadeplot_opts,
+ 30000, 10, 1500, 1, 64, 0.6, "",
+ "Shows a fading plot of sine squared", 0, NULL};
+
+#endif
#define MINSTEPS 1
-#define ANGLES 1000
typedef struct {
XPoint speed, step, factor, st;
int min;
int width, height;
int pix;
- int stab[ANGLES];
+ int angles;
+ int *stab;
XPoint *pts;
} fadeplotstruct;
-static fadeplotstruct *fadeplots = NULL;
+static fadeplotstruct *fadeplots = (fadeplotstruct *) NULL;
static void
+free_fadeplot(fadeplotstruct *fp)
+{
+ if (fp->pts != NULL) {
+ (void) free((void *) fp->pts);
+ fp->pts = (XPoint *) NULL;
+ }
+ if (fp->stab != NULL) {
+ (void) free((void *) fp->stab);
+ fp->stab = (int *) NULL;
+ }
+}
+
+static Bool
initSintab(ModeInfo * mi)
{
fadeplotstruct *fp = &fadeplots[MI_SCREEN(mi)];
int i;
float x;
- for (i = 0; i < ANGLES; i++) {
- x = SINF(i * 2 * M_PI / ANGLES);
+ fp->angles = NRAND(950) + 250;
+ if ((fp->stab = (int *) malloc(fp->angles * sizeof (int))) == NULL) {
+ free_fadeplot(fp);
+ return False;
+ }
+ for (i = 0; i < fp->angles; i++) {
+ x = SINF(2.0 * M_PI * i / fp->angles);
fp->stab[i] = (int) (x * ABS(x) * fp->min) + fp->min;
}
+ return True;
}
void
}
fp = &fadeplots[MI_SCREEN(mi)];
- fp->width = MI_WIN_WIDTH(mi);
- fp->height = MI_WIN_HEIGHT(mi);
- fp->min = MAX(MIN(fp->width, fp->height) / 2, 1);
+ fp->width = MI_WIDTH(mi);
+ fp->height = MI_HEIGHT(mi);
+ fp->min = MAX(MIN(fp->width, fp->height) / 2, 1);
fp->speed.x = 8;
fp->speed.y = 10;
fp->factor.x = MAX(fp->width / (2 * fp->min), 1);
fp->factor.y = MAX(fp->height / (2 * fp->min), 1);
- fp->nbstep = MI_BATCHCOUNT(mi);
+ fp->nbstep = MI_COUNT(mi);
if (fp->nbstep < -MINSTEPS) {
fp->nbstep = NRAND(-fp->nbstep - MINSTEPS + 1) + MINSTEPS;
} else if (fp->nbstep < MINSTEPS)
fp->nbstep = MINSTEPS;
- fp->maxpts = MI_CYCLES(mi);
- if (fp->maxpts < 1)
- fp->maxpts = 1;
+ fp->maxpts = MI_CYCLES(mi);
+ if (fp->maxpts < 1)
+ fp->maxpts = 1;
- if (fp->pts == NULL)
- fp->pts = (XPoint *) calloc(fp->maxpts, sizeof (XPoint));
+ if (fp->pts == NULL) {
+ if ((fp->pts = (XPoint *) calloc(fp->maxpts, sizeof (XPoint))) ==
+ NULL) {
+ free_fadeplot(fp);
+ return;
+ }
+ }
if (MI_NPIXELS(mi) > 2)
fp->pix = NRAND(MI_NPIXELS(mi));
- initSintab(mi);
-
- XClearWindow(MI_DISPLAY(mi), MI_WINDOW(mi));
+ if (fp->stab != NULL)
+ (void) free((void *) fp->stab);
+ if (!initSintab(mi))
+ return;
+ MI_CLEARWINDOW(mi);
}
void
draw_fadeplot(ModeInfo * mi)
{
- fadeplotstruct *fp = &fadeplots[MI_SCREEN(mi)];
Display *display = MI_DISPLAY(mi);
Window window = MI_WINDOW(mi);
GC gc = MI_GC(mi);
- int i, j;
- long temp;
+ int i, j, temp;
+ fadeplotstruct *fp;
- XSetForeground(display, gc, MI_WIN_BLACK_PIXEL(mi));
+ if (fadeplots == NULL)
+ return;
+ fp = &fadeplots[MI_SCREEN(mi)];
+ if (fp->stab == NULL)
+ return;
+
+ MI_IS_DRAWN(mi) = True;
+ XSetForeground(display, gc, MI_BLACK_PIXEL(mi));
XDrawPoints(display, window, gc, fp->pts, fp->maxpts, CoordModeOrigin);
if (MI_NPIXELS(mi) > 2) {
if (++fp->pix >= MI_NPIXELS(mi))
fp->pix = 0;
} else
- XSetForeground(display, gc, MI_WIN_WHITE_PIXEL(mi));
-
- for (temp = fp->nbstep - 1; temp >= 0; temp--) {
- j = temp;
- for (i = 0; i < fp->maxpts / fp->nbstep; i++) {
- fp->pts[temp * i + i].x =
- fp->stab[(fp->st.x + fp->speed.x * j + i * fp->step.x) % ANGLES] *
- fp->factor.x + fp->width / 2 - fp->min;
- fp->pts[temp * i + i].y =
- fp->stab[(fp->st.y + fp->speed.y * j + i * fp->step.y) % ANGLES] *
- fp->factor.y + fp->height / 2 - fp->min;
- }
+ XSetForeground(display, gc, MI_WHITE_PIXEL(mi));
+
+ temp = 0;
+ for (j = 0; j < fp->nbstep; j++) {
+ for (i = 0; i < fp->maxpts / fp->nbstep; i++) {
+ fp->pts[temp].x =
+ fp->stab[(fp->st.x + fp->speed.x * j + i * fp->step.x) % fp->angles] *
+ fp->factor.x + fp->width / 2 - fp->min;
+ fp->pts[temp].y =
+ fp->stab[(fp->st.y + fp->speed.y * j + i * fp->step.y) % fp->angles] *
+ fp->factor.y + fp->height / 2 - fp->min;
+ temp++;
}
- XDrawPoints(display, window, gc, fp->pts, fp->maxpts, CoordModeOrigin);
+ }
+ XDrawPoints(display, window, gc, fp->pts, temp, CoordModeOrigin);
XFlush(display);
- fp->st.x = (fp->st.x + fp->speed.x) % ANGLES;
- fp->st.y = (fp->st.y + fp->speed.y) % ANGLES;
+ fp->st.x = (fp->st.x + fp->speed.x) % fp->angles;
+ fp->st.y = (fp->st.y + fp->speed.y) % fp->angles;
fp->temps++;
- if ((fp->temps % (ANGLES / 2)) == 0) {
- fp->temps = fp->temps % ANGLES * 5;
- if ((fp->temps % (ANGLES)) == 0)
+ if ((fp->temps % (fp->angles / 2)) == 0) {
+ fp->temps = fp->temps % fp->angles * 5;
+ if ((fp->temps % (fp->angles)) == 0)
fp->speed.y = (fp->speed.y++) % 30 + 1;
- if ((fp->temps % (ANGLES * 2)) == 0)
+ if ((fp->temps % (fp->angles * 2)) == 0)
fp->speed.x = (fp->speed.x) % 20;
- if ((fp->temps % (ANGLES * 3)) == 0)
+ if ((fp->temps % (fp->angles * 3)) == 0)
fp->step.y = (fp->step.y++) % 2 + 1;
- XClearWindow(display, window);
+
+ MI_CLEARWINDOW(mi);
}
}
void
refresh_fadeplot(ModeInfo * mi)
{
-
+ MI_CLEARWINDOW(mi);
}
void
release_fadeplot(ModeInfo * mi)
{
- /* Do nothing, it will refresh by itself */
+ if (fadeplots != NULL) {
+ int screen;
+
+ for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++)
+ free_fadeplot(&fadeplots[screen]);
+ (void) free((void *) fadeplots);
+ fadeplots = (fadeplotstruct *) NULL;
+ }
}
+
+#endif /* MODE_fadeplot */
projects / xscreensaver / blobdiff