*
* Created : Wed Apr 22 09:30:30 1998, hmallat
* Last modified: Wed Apr 22 09:30:30 1998, hmallat
+ * Last modified: Sun Aug 31 23:40:14 2003,
+ * david slimp <rock808@DavidSlimp.com>
+ * added -hue option to specify base color hue
*
* TODO:
*
#include "screenhack.h"
-# include <X11/Xutil.h>
-
/* I thought it would be faster this way, but it turns out not to be... -jwz */
#undef USE_XIMAGE
# include "xshm.h"
#endif /* HAVE_XSHM_EXTENSION */
-char *progclass="Interference";
-
-char *defaults [] = {
+static const char *interference_defaults [] = {
+ ".background: black",
+ ".foreground: white",
"*count: 3", /* number of waves */
"*gridsize: 4", /* pixel size, smaller values for better resolution */
"*ncolors: 128", /* number of colours used */
+ "*hue: 0", /* hue to use for base color (0-360) */
"*speed: 30", /* speed of wave origins moving around */
"*delay: 30000", /* or something */
"*color-shift: 60", /* h in hsv space, smaller values for smaller
0
};
-XrmOptionDescRec options [] = {
+static XrmOptionDescRec interference_options [] = {
{ "-count", ".count", XrmoptionSepArg, 0 },
{ "-ncolors", ".ncolors", XrmoptionSepArg, 0 },
{ "-gridsize", ".gridsize", XrmoptionSepArg, 0 },
+ { "-hue", ".hue", XrmoptionSepArg, 0 },
{ "-speed", ".speed", XrmoptionSepArg, 0 },
{ "-delay", ".delay", XrmoptionSepArg, 0 },
{ "-color-shift", ".color-shift", XrmoptionSepArg, 0 },
{ 0, 0, 0, 0 }
};
-int options_size = (sizeof (options) / sizeof (XrmOptionDescRec));
-
struct inter_source {
int x;
int y;
int count;
int grid_size;
int colors;
+ float hue;
int speed;
int delay;
int shift;
# define TARGET(c) ((c)->pix_buf ? (c)->pix_buf : (c)->win)
#endif /* !HAVE_DOUBLE_BUFFER_EXTENSION */
-void inter_init(Display* dpy, Window win, struct inter_context* c)
+static void inter_init(Display* dpy, Window win, struct inter_context* c)
{
XWindowAttributes xgwa;
double H[3], S[3], V[3];
int gray;
XGCValues val;
unsigned long valmask = 0;
- Bool dbuf = get_boolean_resource ("doubleBuffer", "Boolean");
+ Bool dbuf = get_boolean_resource (dpy, "doubleBuffer", "Boolean");
+
+# ifdef HAVE_COCOA /* Don't second-guess Quartz's double-buffering */
+ dbuf = False;
+# endif
memset (c, 0, sizeof(*c));
c->dpy = dpy;
c->win = win;
+ c->delay = get_integer_resource(dpy, "delay", "Integer");
+
+
XGetWindowAttributes(c->dpy, c->win, &xgwa);
c->w = xgwa.width;
c->h = xgwa.height;
c->cmap = xgwa.colormap;
#ifdef HAVE_XSHM_EXTENSION
- c->use_shm = get_boolean_resource("useSHM", "Boolean");
+ c->use_shm = get_boolean_resource(dpy, "useSHM", "Boolean");
#endif /* HAVE_XSHM_EXTENSION */
if (dbuf)
val.function = GXcopy;
c->copy_gc = XCreateGC(c->dpy, TARGET(c), GCFunction, &val);
- c->count = get_integer_resource("count", "Integer");
+ c->count = get_integer_resource(dpy, "count", "Integer");
if(c->count < 1)
c->count = 1;
- c->grid_size = get_integer_resource("gridsize", "Integer");
+ c->grid_size = get_integer_resource(dpy, "gridsize", "Integer");
if(c->grid_size < 1)
c->grid_size = 1;
- mono = get_boolean_resource("mono", "Boolean");
+ mono = get_boolean_resource(dpy, "mono", "Boolean");
if(!mono) {
- c->colors = get_integer_resource("ncolors", "Integer");
+ c->colors = get_integer_resource(dpy, "ncolors", "Integer");
if(c->colors < 2)
c->colors = 2;
}
- c->speed = get_integer_resource("speed", "Integer");
- c->shift = get_float_resource("color-shift", "Float");
+ c->hue = get_integer_resource(dpy, "hue", "Float");
+ while (c->hue < 0 || c->hue >= 360)
+ c->hue = frand(360.0);
+ c->speed = get_integer_resource(dpy, "speed", "Integer");
+ c->shift = get_float_resource(dpy, "color-shift", "Float");
while(c->shift >= 360.0)
c->shift -= 360.0;
while(c->shift <= -360.0)
c->shift += 360.0;
- c->radius = get_integer_resource("radius", "Integer");;
+ c->radius = get_integer_resource(dpy, "radius", "Integer");;
if(c->radius < 1)
c->radius = 1;
if(!mono) {
c->pal = calloc(c->colors, sizeof(XColor));
- gray = get_boolean_resource("gray", "Boolean");
+ gray = get_boolean_resource(dpy, "gray", "Boolean");
if(!gray) {
- H[0] = frand(360.0);
+ H[0] = c->hue;
H[1] = H[0] + c->shift < 360.0 ? H[0]+c->shift : H[0] + c->shift-360.0;
H[2] = H[1] + c->shift < 360.0 ? H[1]+c->shift : H[1] + c->shift-360.0;
S[0] = S[1] = S[2] = 1.0;
* it, go ahead!
*/
-void do_inter(struct inter_context* c)
+static void do_inter(struct inter_context* c)
{
int i, j, k;
int result;
dx = i*g + g/2 - c->source[k].x;
dy = j*g + g/2 - c->source[k].y;
dist = sqrt(dx*dx + dy*dy); /* what's the performance penalty here? */
- result += (dist > c->radius ? 0 : c->wave_height[dist]);
+ result += (dist >= c->radius ? 0 : c->wave_height[dist]);
}
result %= c->colors;
XCopyArea (c->dpy, c->pix_buf, c->win, c->copy_gc,
0, 0, c->w, c->h, 0, 0);
}
+}
- XSync(c->dpy, False);
+static void *
+interference_init (Display *dpy, Window win)
+{
+ struct inter_context *c = (struct inter_context *) calloc (1, sizeof(*c));
+ inter_init(dpy, win, c);
+ return c;
}
-void screenhack(Display *dpy, Window win)
+static unsigned long
+interference_draw (Display *dpy, Window win, void *closure)
{
- struct inter_context c;
- int delay;
+ struct inter_context *c = (struct inter_context *) closure;
+ do_inter(c);
+ return c->delay;
+}
- delay = get_integer_resource("delay", "Integer");
+static void
+interference_reshape (Display *dpy, Window window, void *closure,
+ unsigned int w, unsigned int h)
+{
+ struct inter_context *c = (struct inter_context *) closure;
+ c->w = w;
+ c->h = h;
+}
- inter_init(dpy, win, &c);
- while(1) {
- do_inter(&c);
- screenhack_handle_events (dpy);
- if(delay) usleep(delay);
- }
+static Bool
+interference_event (Display *dpy, Window window, void *closure, XEvent *event)
+{
+ return False;
}
+
+static void
+interference_free (Display *dpy, Window window, void *closure)
+{
+}
+
+XSCREENSAVER_MODULE ("Interference", interference)
projects / xscreensaver / blobdiff