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xenocara/app/xlockmore/modes/tube.c
matthieu 110b2a9207 Importing xlockmore 5.22
2006-11-26 11:07:42 +00:00

477 lines
13 KiB
C
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/* -*- Mode: C; tab-width: 4 -*- */
/* tube --- animated tube */
#if !defined( lint ) && !defined( SABER )
static const char sccsid[] = "@(#)tube.c 5.09 2003/06/30 xlockmore";
#endif
/*-
* Copyright (c) 1997 Dan Stromberg <strombrg@nis.acs.uci.edu>
*
* 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:
* 30-Jun-2003: Changed writeable mode to be more consistent with
* xscreensaver's starfish
* 01-Nov-2000: Allocation checks
* 10-May-1997: Compatible with xscreensaver
* 04-Mar-1997: Memory leak fix by Tom Schmidt <tschmidt@micron.com>
* 07-Feb-1997: Written by Dan Stromberg <strombrg@nis.acs.uci.edu>
*/
#ifdef STANDALONE
#define MODE_tube
#define PROGCLASS "Tube"
#define HACK_INIT init_tube
#define HACK_DRAW draw_tube
#define tube_opts xlockmore_opts
#define DEFAULTS "*delay: 25000 \n" \
"*cycles: 20000 \n" \
"*size: -200 \n" \
"*ncolors: 200 \n"
#define SMOOTH_COLORS
#define WRITABLE_COLORS
#include "xlockmore.h" /* from the xscreensaver distribution */
#else /* !STANDALONE */
#include "xlock.h" /* from the xlockmore distribution */
#include "color.h"
#endif /* !STANDALONE */
#ifdef MODE_tube
#define DEF_CYCLE "True"
static Bool cycle_p;
static XrmOptionDescRec opts[] =
{
{(char *) "-cycle", (char *) ".tube.cycle", XrmoptionNoArg, (caddr_t) "on"},
{(char *) "+cycle", (char *) ".tube.cycle", XrmoptionNoArg, (caddr_t) "off"}
};
static argtype vars[] =
{
{(void *) & cycle_p, (char *) "cycle", (char *) "Cycle", (char *) DEF_CYCLE, t_Bool}
};
static OptionStruct desc[] =
{
{(char *) "-/+cycle", (char *) "turn on/off colour cycling"}
};
ModeSpecOpt tube_opts =
{sizeof opts / sizeof opts[0], opts, sizeof vars / sizeof vars[0], vars, desc};
#ifdef USE_MODULES
ModStruct tube_description =
{"tube", "init_tube", "draw_tube", "release_tube",
NULL, "init_tube", (char *) NULL, &tube_opts,
25000, -9, 20000, -200, 64, 1.0, "",
"Shows an animated tube", 0, NULL};
#endif
#define MINSIZE 3
#define MINSHAPE 1
typedef struct {
int dx1, dy1;
int x1, y1;
int width, height, average, linewidth;
int shape;
XPoint *pts, *proto_pts;
unsigned int cur_color;
GC gc;
Colormap cmap;
unsigned long blackpixel, whitepixel, fg, bg;
int direction;
XColor *colors;
int counter;
int ncolors;
Bool cycle_p, mono_p, no_colors, reverse;
ModeInfo *mi;
} tubestruct;
static tubestruct *tubes = (tubestruct *) NULL;
static void
free_pts(tubestruct *tp)
{
if (tp->pts != NULL) {
free(tp->pts);
tp->pts = (XPoint *) NULL;
}
if (tp->proto_pts != NULL) {
free(tp->proto_pts);
tp->proto_pts = (XPoint *) NULL;
}
}
static void
free_tube(Display *display, tubestruct *tp)
{
ModeInfo *mi = tp->mi;
free_pts(tp);
if (MI_IS_INSTALL(mi) && MI_NPIXELS(mi) > 2) {
MI_WHITE_PIXEL(mi) = tp->whitepixel;
MI_BLACK_PIXEL(mi) = tp->blackpixel;
#ifndef STANDALONE
MI_FG_PIXEL(mi) = tp->fg;
MI_BG_PIXEL(mi) = tp->bg;
#endif
if (tp->colors != NULL) {
if (tp->ncolors && !tp->no_colors)
free_colors(display, tp->cmap, tp->colors, tp->ncolors);
free(tp->colors);
tp->colors = (XColor *) NULL;
}
if (tp->cmap != None) {
XFreeColormap(display, tp->cmap);
tp->cmap = None;
}
}
if (tp->gc != None) {
XFreeGC(display, tp->gc);
tp->gc = None;
}
}
#ifndef STANDALONE
extern char *background;
extern char *foreground;
#endif
void
init_tube(ModeInfo * mi)
{
Display *display = MI_DISPLAY(mi);
Window window = MI_WINDOW(mi);
int screen_width, screen_height;
int size = MI_SIZE(mi);
int star = 1, lw;
tubestruct *tp;
if (tubes == NULL) {
if ((tubes = (tubestruct *) calloc(MI_NUM_SCREENS(mi),
sizeof (tubestruct))) == NULL)
return;
}
tp = &tubes[MI_SCREEN(mi)];
tp->mi = mi;
screen_width = MI_WIDTH(mi);
screen_height = MI_HEIGHT(mi);
if (size < -MINSIZE) {
tp->width = NRAND(MIN(-size, MAX(MINSIZE, screen_width / 2)) -
MINSIZE + 1) + MINSIZE;
tp->height = NRAND(MIN(-size, MAX(MINSIZE, screen_height / 2)) -
MINSIZE + 1) + MINSIZE;
} else if (size < MINSIZE) {
if (!size) {
tp->width = MAX(MINSIZE, screen_width / 2);
tp->height = MAX(MINSIZE, screen_height / 2);
} else {
tp->width = MINSIZE;
tp->height = MINSIZE;
}
} else {
tp->width = MIN(size, MAX(MINSIZE, screen_width / 2));
tp->height = MIN(size, MAX(MINSIZE, screen_height / 2));
}
tp->average = (tp->width + tp->height) / 2;
tp->reverse = (Bool) (LRAND() & 1);
tp->dx1 = LRAND() & 1;
if (tp->dx1 == 0)
tp->dx1 = -1;
tp->dy1 = LRAND() & 1;
if (tp->dy1 == 0)
tp->dy1 = -1;
free_pts(tp);
tp->shape = MI_COUNT(mi);
if (tp->shape < -MINSHAPE) {
tp->shape = NRAND(-tp->shape - MINSHAPE + 1) + MINSHAPE;
} else if (tp->shape < MINSHAPE)
tp->shape = MINSHAPE;
if (tp->shape >= 3) {
int i;
float start;
tp->width = tp->height = tp->average;
if (((tp->pts = (XPoint *) malloc((tp->shape + 1) *
sizeof (XPoint))) == NULL) ||
((tp->proto_pts = (XPoint *) malloc((tp->shape + 1) *
sizeof (XPoint))) == NULL)) {
free_tube(display, tp);
return;
}
start = (float) NRAND(360);
do {
star = NRAND(tp->shape / 2) + 1; /* Not always a star but thats ok. */
} while ((star != 1) && (!(tp->shape % star)));
for (i = 0; i < tp->shape; i++) {
tp->proto_pts[i].x = tp->average / 2 +
(int) (cos((double) start * 2.0 * M_PI / 360.0) * tp->average / 2.0);
tp->proto_pts[i].y = tp->average / 2 +
(int) (sin((double) start * 2.0 * M_PI / 360.0) * tp->average / 2.0);
start += star * 360 / tp->shape;
}
tp->proto_pts[tp->shape] = tp->proto_pts[0];
}
tp->linewidth = NRAND(tp->average / 6 + 1) + 1;
if (star > 1) /* Make the width less */
tp->linewidth = NRAND(tp->linewidth / 2 + 1) + 1;
lw = tp->linewidth / 2;
tp->x1 = NRAND(screen_width - tp->width - 2 * lw) + lw;
tp->y1 = NRAND(screen_height - tp->height - 2 * lw) + lw;
tp->counter = 0;
if (!tp->gc) {
if (MI_IS_INSTALL(mi) && MI_NPIXELS(mi) > 2) {
XColor color;
#ifndef STANDALONE
tp->fg = MI_FG_PIXEL(mi);
tp->bg = MI_BG_PIXEL(mi);
#endif
tp->blackpixel = MI_BLACK_PIXEL(mi);
tp->whitepixel = MI_WHITE_PIXEL(mi);
if ((tp->cmap = XCreateColormap(display, window,
MI_VISUAL(mi), AllocNone)) == None) {
free_tube(display, tp);
return;
}
XSetWindowColormap(display, window, tp->cmap);
(void) XParseColor(display, tp->cmap, "black", &color);
(void) XAllocColor(display, tp->cmap, &color);
MI_BLACK_PIXEL(mi) = color.pixel;
(void) XParseColor(display, tp->cmap, "white", &color);
(void) XAllocColor(display, tp->cmap, &color);
MI_WHITE_PIXEL(mi) = color.pixel;
#ifndef STANDALONE
(void) XParseColor(display, tp->cmap, background, &color);
(void) XAllocColor(display, tp->cmap, &color);
MI_BG_PIXEL(mi) = color.pixel;
(void) XParseColor(display, tp->cmap, foreground, &color);
(void) XAllocColor(display, tp->cmap, &color);
MI_FG_PIXEL(mi) = color.pixel;
#endif
tp->colors = (XColor *) NULL;
tp->ncolors = 0;
}
if ((tp->gc = XCreateGC(display, MI_WINDOW(mi),
(unsigned long) 0, (XGCValues *) NULL)) == None) {
free_tube(display, tp);
return;
}
}
MI_CLEARWINDOW(mi);
/* Set up colour map */
tp->direction = (LRAND() & 1) ? 1 : -1;
if (MI_IS_INSTALL(mi) && MI_NPIXELS(mi) > 2) {
if (tp->colors != NULL) {
if (tp->ncolors && !tp->no_colors)
free_colors(display, tp->cmap, tp->colors, tp->ncolors);
free(tp->colors);
tp->colors = (XColor *) NULL;
}
tp->ncolors = MI_NCOLORS(mi);
if (tp->ncolors < 2)
tp->ncolors = 2;
if (tp->ncolors <= 2)
tp->mono_p = True;
else
tp->mono_p = False;
if (tp->mono_p)
tp->colors = (XColor *) NULL;
else
if ((tp->colors = (XColor *) malloc(sizeof (*tp->colors) *
(tp->ncolors + 1))) == NULL) {
free_tube(display, tp);
return;
}
tp->cycle_p = has_writable_cells(mi);
if (tp->cycle_p) {
if (MI_IS_FULLRANDOM(mi)) {
if (!NRAND(8))
tp->cycle_p = False;
else
tp->cycle_p = True;
} else {
tp->cycle_p = cycle_p;
}
}
if (!tp->mono_p) {
if (!(LRAND() % 10))
make_random_colormap(
#if STANDALONE
display, MI_WINDOW(mi),
#else
mi,
#endif
tp->cmap, tp->colors, &tp->ncolors,
True, True, &tp->cycle_p);
else if (!(LRAND() % 2))
make_uniform_colormap(
#if STANDALONE
display, MI_WINDOW(mi),
#else
mi,
#endif
tp->cmap, tp->colors, &tp->ncolors,
True, &tp->cycle_p);
else
make_smooth_colormap(
#if STANDALONE
display, MI_WINDOW(mi),
#else
mi,
#endif
tp->cmap, tp->colors, &tp->ncolors,
True, &tp->cycle_p);
}
XInstallColormap(display, tp->cmap);
if (tp->ncolors < 2) {
tp->ncolors = 2;
tp->no_colors = True;
} else
tp->no_colors = False;
if (tp->ncolors <= 2)
tp->mono_p = True;
if (tp->mono_p)
tp->cycle_p = False;
}
if (MI_IS_INSTALL(mi) && MI_NPIXELS(mi) > 2) {
if (tp->mono_p) {
tp->cur_color = MI_BLACK_PIXEL(mi);
}
}
}
void
draw_tube(ModeInfo * mi)
{
Display *display = MI_DISPLAY(mi);
Window window = MI_WINDOW(mi);
unsigned int i;
int lw;
tubestruct *tp;
if (tubes == NULL)
return;
tp = &tubes[MI_SCREEN(mi)];
if (tp->no_colors) {
init_tube(mi);
return;
}
if (tp->shape >= 3 && tp->pts == NULL)
return;
MI_IS_DRAWN(mi) = True;
lw = tp->linewidth / 2;
if (MI_IS_INSTALL(mi) && MI_NPIXELS(mi) > 2) {
if (tp->mono_p) {
XSetForeground(display, tp->gc, tp->cur_color);
} else {
tp->cur_color = (tp->cur_color + 1) % tp->ncolors;
XSetForeground(display, tp->gc, tp->colors[tp->cur_color].pixel);
}
} else {
if (MI_NPIXELS(mi) > 2)
XSetForeground(display, tp->gc, MI_PIXEL(mi, tp->cur_color));
else if (tp->cur_color)
XSetForeground(display, tp->gc, MI_BLACK_PIXEL(mi));
else
XSetForeground(display, tp->gc, MI_WHITE_PIXEL(mi));
if (++tp->cur_color >= (unsigned int) MI_NPIXELS(mi))
tp->cur_color = 0;
}
/* Rotate colours */
if (tp->cycle_p) {
rotate_colors(display, tp->cmap, tp->colors, tp->ncolors,
tp->direction);
if (!(LRAND() % 1000))
tp->direction = -tp->direction;
}
/* move rectangle forward, horiz */
tp->x1 += tp->dx1;
if (tp->x1 < lw) {
tp->x1 = lw;
tp->dx1 = -tp->dx1;
}
if (tp->x1 + tp->width + lw >= MI_WIDTH(mi)) {
tp->x1 = MI_WIDTH(mi) - tp->width - 1 - lw;
tp->dx1 = -tp->dx1;
}
/* move rectange forward, vert */
tp->y1 += tp->dy1;
if (tp->y1 < lw) {
tp->y1 = lw;
tp->dy1 = -tp->dy1;
}
if (tp->y1 + tp->height + lw >= MI_HEIGHT(mi)) {
tp->y1 = MI_HEIGHT(mi) - tp->height - 1 - lw;
tp->dy1 = -tp->dy1;
}
XSetLineAttributes(display, tp->gc, tp->linewidth + (tp->shape >= 2),
LineSolid, CapNotLast, JoinRound);
if (tp->shape < 2)
XDrawRectangle(display, window, tp->gc,
tp->x1, tp->y1, tp->width, tp->height);
else if (tp->shape == 2)
XDrawArc(display, window, tp->gc,
tp->x1, tp->y1, tp->width, tp->height, 0, 23040);
else {
for (i = 0; i <= (unsigned int) tp->shape; i++) {
tp->pts[i].x = tp->x1 + tp->proto_pts[i].x;
tp->pts[i].y = tp->y1 + tp->proto_pts[i].y;
}
XDrawLines(display, window, tp->gc, tp->pts, tp->shape + 1,
CoordModeOrigin);
}
XSetLineAttributes(display, tp->gc, 1, LineSolid, CapNotLast, JoinRound);
tp->counter++;
if (tp->counter > MI_CYCLES(mi)) {
init_tube(mi);
}
}
void
release_tube(ModeInfo * mi)
{
if (tubes != NULL) {
int screen;
for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++)
free_tube(MI_DISPLAY(mi), &tubes[screen]);
free(tubes);
tubes = (tubestruct *) NULL;
}
}
#endif /* MODE_tube */
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