Importing xlockmore 5.22

1 files changed, 333 insertions, 0 deletions

diff --git a/app/xlockmore/modes/spiral.c b/app/xlockmore/modes/spiral.c
new file mode 100644
index 000000000..38c1e869e
--- /dev/null
+++ b/app/xlockmore/modes/spiral.c
@@ -0,0 +1,333 @@
+/* -*- Mode: C; tab-width: 4 -*- */
+/* spiral --- spiraling dots */
+
+#if !defined( lint ) && !defined( SABER )
+static const char sccsid[] = "@(#)spiral.c	5.00 2000/11/01 xlockmore";
+
+#endif
+
+/*-
+ * Copyright (c) 1994 by Darrick Brown.
+ *
+ * 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:
+ * 01-Nov-2000: Allocation checks
+ * 10-May-1997: jwz@jwz.org: turned into a standalone program.
+ * 24-Jul-1995: Fix to allow cycles not to have an arbitrary value by
+ *              Peter Schmitzberger (schmitz@coma.sbg.ac.at).
+ * 06-Mar-1995: Finished cleaning up and final testing.
+ * 03-Mar-1995: Cleaned up code.
+ * 12-Jul-1994: Written.
+ *
+ * Low CPU usage mode.
+ * Idea based on a graphics demo I saw a *LONG* time ago.
+ */
+
+#ifdef STANDALONE
+#define MODE_spiral
+#define PROGCLASS "Spiral"
+#define HACK_INIT init_spiral
+#define HACK_DRAW draw_spiral
+#define spiral_opts xlockmore_opts
+#define DEFAULTS "*delay: 5000 \n" \
+ "*count: -40 \n" \
+ "*cycles: 350 \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 */
+
+#ifdef MODE_spiral
+
+ModeSpecOpt spiral_opts =
+{0, (XrmOptionDescRec *) NULL, 0, (argtype *) NULL, (OptionStruct *) NULL};
+
+#ifdef USE_MODULES
+ModStruct   spiral_description =
+{"spiral", "init_spiral", "draw_spiral", "release_spiral",
+ "refresh_spiral", "init_spiral", (char *) NULL, &spiral_opts,
+ 5000, -40, 350, 1, 64, 1.0, "",
+ "Shows a helical locus of points", 0, NULL};
+
+#endif
+
+#define MAXTRAIL 512		/* The length of the trail */
+#define MAXDOTS 40
+#define MINDOTS 1
+#define TWOPI (2.0*M_PI)	/* for convienence */
+#define JAGGINESS 4		/* This sets the "Craziness" of the spiral (I like 4) */
+#define SPEED 2.0
+
+/* How many segments to draw per cycle when redrawing */
+#define REDRAWSTEP 3
+
+
+typedef struct {
+	float       hx, hy, ha, hr;
+} Traildots;
+
+typedef struct {
+	Traildots  *traildots;
+	float       cx, cy;
+	float       angle;
+	float       radius;
+	float       dr, da;
+	float       dx, dy;
+	int         erase;
+	int         inc;
+	float       colors;
+	int         width, height;
+	float       top, bottom, left, right;
+	int         dots, nlength;
+	int         redrawing, redrawpos;
+} spiralstruct;
+
+static spiralstruct *spirals = (spiralstruct *) NULL;
+
+static void draw_dots(ModeInfo * mi, int in);
+
+#define TFX(sp,x) ((int)((x/sp->right)*(float)sp->width))
+#define TFY(sp,y) ((int)((y/sp->top)*(float)sp->height))
+
+static void
+draw_dots(ModeInfo * mi, int in)
+{
+
+	float       i, inc;
+	float       x, y;
+
+	spiralstruct *sp = &spirals[MI_SCREEN(mi)];
+
+	inc = TWOPI / (float) sp->dots;
+	for (i = 0.0; i < TWOPI; i += inc) {
+		x = sp->traildots[in].hx + COSF(i + sp->traildots[in].ha) *
+			sp->traildots[in].hr;
+		y = sp->traildots[in].hy + SINF(i + sp->traildots[in].ha) *
+			sp->traildots[in].hr;
+		XDrawPoint(MI_DISPLAY(mi), MI_WINDOW(mi), MI_GC(mi),
+			   TFX(sp, x), TFY(sp, y));
+	}
+}
+
+void
+init_spiral(ModeInfo * mi)
+{
+	spiralstruct *sp;
+	int         i;
+
+	if (spirals == NULL) {
+		if ((spirals = (spiralstruct *) calloc(MI_NUM_SCREENS(mi),
+					     sizeof (spiralstruct))) == NULL)
+			return;
+	}
+	sp = &spirals[MI_SCREEN(mi)];
+
+	sp->width = MI_WIDTH(mi);
+	sp->height = MI_HEIGHT(mi);
+
+	MI_CLEARWINDOW(mi);
+
+	/* Init */
+	if (MI_CYCLES(mi) < 2)
+		sp->nlength = 2;
+	else
+		sp->nlength = MI_CYCLES(mi);
+
+	if (!sp->traildots)
+		if ((sp->traildots = (Traildots *) malloc(sp->nlength *
+				sizeof (Traildots))) == NULL) {
+			return;
+		}
+
+	/* initialize the allocated array */
+	for (i = 0; i < sp->nlength; i++) {
+		sp->traildots[i].hx = 0.0;
+		sp->traildots[i].hy = 0.0;
+		sp->traildots[i].ha = 0.0;
+		sp->traildots[i].hr = 0.0;
+	}
+	sp->redrawing = 0;
+
+	/* keep the window parameters proportional */
+	sp->top = 10000.0;
+	sp->bottom = 0;
+	sp->right = (float) (sp->width) / (float) (sp->height) * (10000.0);
+	sp->left = 0;
+
+	/* assign the initial values */
+	sp->cx = (float) (5000.0 - NRAND(2000)) / 10000.0 * sp->right;
+	sp->cy = (float) (5000.0 - NRAND(2000));
+	sp->radius = (float) (NRAND(200) + 200);
+	sp->angle = 0.0;
+	sp->dx = (float) (10 - NRAND(20)) * SPEED;
+	sp->dy = (float) (10 - NRAND(20)) * SPEED;
+	sp->dr = (float) ((NRAND(10) + 4) * (1 - (LRAND() & 1) * 2));
+	sp->da = (float) NRAND(360) / 7200.0 + 0.01;
+	if (MI_NPIXELS(mi) > 2)
+		sp->colors = (float) NRAND(MI_NPIXELS(mi));
+	sp->erase = 0;
+	sp->inc = 0;
+	sp->traildots[sp->inc].hx = sp->cx;
+	sp->traildots[sp->inc].hy = sp->cy;
+	sp->traildots[sp->inc].ha = sp->angle;
+	sp->traildots[sp->inc].hr = sp->radius;
+	sp->inc++;
+
+	sp->dots = MI_COUNT(mi);
+	if (sp->dots < -MINDOTS)
+		sp->dots = NRAND(sp->dots - MINDOTS + 1) + MINDOTS;
+	/* Absolute minimum */
+	if (sp->dots < MINDOTS)
+		sp->dots = MINDOTS;
+}
+
+void
+draw_spiral(ModeInfo * mi)
+{
+	Display    *display = MI_DISPLAY(mi);
+	GC          gc = MI_GC(mi);
+	int         i, j;
+	spiralstruct *sp;
+
+	if (spirals == NULL)
+		return;
+	sp = &spirals[MI_SCREEN(mi)];
+	if (sp->traildots == NULL)
+		return;
+
+	MI_IS_DRAWN(mi) = True;
+	if (sp->erase == 1) {
+		XSetForeground(display, gc, MI_BLACK_PIXEL(mi));
+		draw_dots(mi, sp->inc);
+	}
+	sp->cx += sp->dx;
+	sp->traildots[sp->inc].hx = sp->cx;
+
+	if ((sp->cx > 9000.0) || (sp->cx < 1000.0))
+		sp->dx *= -1.0;
+
+	sp->cy += sp->dy;
+	sp->traildots[sp->inc].hy = sp->cy;
+
+	if ((sp->cy > 9000.0) || (sp->cy < 1000.0))
+		sp->dy *= -1.0;
+
+	sp->radius += sp->dr;
+	sp->traildots[sp->inc].hr = sp->radius;
+
+	if ((sp->radius > 2500.0) && (sp->dr > 0.0))
+		sp->dr *= -1.0;
+	else if ((sp->radius < 50.0) && (sp->radius < 0.0))
+		sp->dr *= -1.0;
+
+	/* Randomly give some variations to:  */
+
+	/* spiral direction (if it is within the boundaries) */
+	if ((NRAND(3000) < 1 * JAGGINESS) &&
+	    (((sp->cx > 2000.0) && (sp->cx < 8000.0)) &&
+	     ((sp->cy > 2000.0) && (sp->cy < 8000.0)))) {
+		sp->dx = (float) (10 - NRAND(20)) * SPEED;
+		sp->dy = (float) (10 - NRAND(20)) * SPEED;
+	}
+	/* The speed of the change in size of the spiral */
+	if (NRAND(3000) < 1 * JAGGINESS) {
+		if (LRAND() & 1)
+			sp->dr += (float) (NRAND(3) + 1);
+		else
+			sp->dr -= (float) (NRAND(3) + 1);
+
+		/* don't let it get too wild */
+		if (sp->dr > 18.0)
+			sp->dr = 18.0;
+		else if (sp->dr < 4.0)
+			sp->dr = 4.0;
+	}
+	/* The speed of rotation */
+	if (NRAND(3000) < 1 * JAGGINESS)
+		sp->da = (float) NRAND(360) / 7200.0 + 0.01;
+
+	/* Reverse rotation */
+	if (NRAND(3000) < 1 * JAGGINESS)
+		sp->da *= -1.0;
+
+	sp->angle += sp->da;
+	sp->traildots[sp->inc].ha = sp->angle;
+
+	if (sp->angle > TWOPI)
+		sp->angle -= TWOPI;
+	else if (sp->angle < 0.0)
+		sp->angle += TWOPI;
+
+	sp->colors += (float) MI_NPIXELS(mi) / ((float) (2 * sp->nlength));
+	if (sp->colors >= (float) MI_NPIXELS(mi))
+		sp->colors = 0.0;
+
+	if (MI_NPIXELS(mi) > 2)
+		XSetForeground(display, gc, MI_PIXEL(mi, (int) sp->colors));
+	else
+		XSetForeground(display, gc, MI_WHITE_PIXEL(mi));
+	draw_dots(mi, sp->inc);
+	sp->inc++;
+
+	if (sp->inc > sp->nlength - 1) {
+		sp->inc -= sp->nlength;
+		sp->erase = 1;
+	}
+	if (sp->redrawing) {
+		for (i = 0; i < REDRAWSTEP; i++) {
+			j = (sp->inc - sp->redrawpos + sp->nlength) % sp->nlength;
+			draw_dots(mi, j);
+
+			if (++(sp->redrawpos) >= sp->nlength) {
+				sp->redrawing = 0;
+				break;
+			}
+		}
+	}
+}
+
+void
+release_spiral(ModeInfo * mi)
+{
+	if (spirals != NULL) {
+		int         screen;
+
+		for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++) {
+			spiralstruct *sp = &spirals[screen];
+
+			if (sp->traildots)
+				free(sp->traildots);
+		}
+		free(spirals);
+		spirals = (spiralstruct *) NULL;
+	}
+}
+
+void
+refresh_spiral(ModeInfo * mi)
+{
+	spiralstruct *sp;
+
+	if (spirals == NULL)
+		return;
+	sp = &spirals[MI_SCREEN(mi)];
+
+	MI_CLEARWINDOW(mi);
+	sp->redrawing = 1;
+	sp->redrawpos = 0;
+}
+
+#endif /* MODE_spiral */