-/* xscreensaver, Copyright (c) 1999 Jamie Zawinski <jwz@jwz.org>
+/* xscreensaver, Copyright (c) 1999, 2001, 2002 Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
#include <math.h>
#include "screenhack.h"
+#include "alpha.h"
+
+#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
+# include "xdbe.h"
+#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
#define countof(x) (sizeof(x)/sizeof(*(x)))
#define ABS(x) ((x)<0?-(x):(x))
+static Bool transparent_p;
+static int nplanes;
+static unsigned long base_pixel, *plane_masks;
+
struct throbber {
int x, y;
int size;
make_throbber (Display *dpy, Drawable d, int w, int h, unsigned long pixel)
{
XGCValues gcv;
+ unsigned long flags;
struct throbber *t = (struct throbber *) malloc (sizeof (*t));
t->x = w / 2;
t->y = h / 2;
else
t->size = t->thickness, t->speed = -t->speed;
- gcv.foreground = pixel;
+ flags = GCForeground;
+ if (transparent_p)
+ {
+ gcv.foreground = ~0L;
+ gcv.plane_mask = base_pixel | plane_masks[random() % nplanes];
+ flags |= GCPlaneMask;
+ }
+ else
+ {
+ gcv.foreground = pixel;
+ }
+
gcv.line_width = t->thickness;
gcv.line_style = LineSolid;
gcv.cap_style = CapProjecting;
gcv.join_style = JoinMiter;
- t->gc = XCreateGC (dpy, d,
- (GCForeground|GCLineWidth|GCLineStyle|
- GCCapStyle|GCJoinStyle),
- &gcv);
+
+ flags |= (GCLineWidth | GCLineStyle | GCCapStyle | GCJoinStyle);
+ t->gc = XCreateGC (dpy, d, flags, &gcv);
switch (random() % 11) {
case 0: case 1: case 2: case 3: t->draw = draw_star; break;
"*thickness: 50",
"*speed: 15",
"*ncolors: 20",
+ "*nlayers: 0",
+ "*transparent: False",
"*doubleBuffer: True",
+#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
+ "*useDBE: True",
+ "*useDBEClear: True",
+#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
0
};
{ "-count", ".count", XrmoptionSepArg, 0 },
{ "-ncolors", ".ncolors", XrmoptionSepArg, 0 },
{ "-speed", ".speed", XrmoptionSepArg, 0 },
+ { "-transparent", ".transparent", XrmoptionNoArg, "True" },
+ { "-opaque", ".transparent", XrmoptionNoArg, "False" },
+ { "-db", ".doubleBuffer", XrmoptionNoArg, "True" },
+ { "-no-db", ".doubleBuffer", XrmoptionNoArg, "False" },
{ 0, 0, 0, 0 }
};
int delay = get_integer_resource ("delay", "Integer");
int ncolors = get_integer_resource ("ncolors", "Integer");
Bool dbuf = get_boolean_resource ("doubleBuffer", "Boolean");
- XColor colors[255];
+ Bool dbeclear_p = get_boolean_resource ("useDBEClear", "Boolean");
+ XColor *colors = 0;
XGCValues gcv;
GC erase_gc = 0;
int i;
struct throbber **throbbers;
XWindowAttributes xgwa;
Pixmap b=0, ba=0, bb=0; /* double-buffer to reduce flicker */
+#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
+ XdbeBackBuffer backb = 0;
+#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
XGetWindowAttributes (dpy, window, &xgwa);
- make_random_colormap (dpy, xgwa.visual, xgwa.colormap,
- colors, &ncolors, True, True, 0, True);
+
+ transparent_p = get_boolean_resource("transparent", "Transparent");
+
+ colors = (XColor *) calloc (sizeof(*colors), ncolors);
+
+ if (get_boolean_resource("mono", "Boolean"))
+ {
+ MONO:
+ ncolors = 1;
+ colors[0].pixel = get_pixel_resource("foreground", "Foreground",
+ dpy, xgwa.colormap);
+ }
+ else if (transparent_p)
+ {
+ nplanes = get_integer_resource ("planes", "Planes");
+ if (nplanes <= 0)
+ nplanes = (random() % (xgwa.depth-2)) + 2;
+
+ allocate_alpha_colors (xgwa.screen, xgwa.visual, xgwa.colormap,
+ &nplanes, True, &plane_masks,
+ &base_pixel);
+ if (nplanes <= 1)
+ {
+ fprintf (stderr,
+ "%s: couldn't allocate any color planes; turning transparency off.\n",
+ progname);
+ transparent_p = False;
+ goto COLOR;
+ }
+ }
+ else
+ {
+ COLOR:
+ make_random_colormap (dpy, xgwa.visual, xgwa.colormap,
+ colors, &ncolors, True, True, 0, True);
+ if (ncolors < 2)
+ goto MONO;
+ }
if (dbuf)
{
- ba = XCreatePixmap (dpy, window, xgwa.width, xgwa.height, xgwa.depth);
- bb = XCreatePixmap (dpy, window, xgwa.width, xgwa.height, xgwa.depth);
- b = ba;
+#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
+ if (dbeclear_p)
+ b = xdbe_get_backbuffer (dpy, window, XdbeBackground);
+ else
+ b = xdbe_get_backbuffer (dpy, window, XdbeUndefined);
+ backb = b;
+#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
+
+ if (!b)
+ {
+ ba = XCreatePixmap (dpy, window, xgwa.width, xgwa.height,xgwa.depth);
+ bb = XCreatePixmap (dpy, window, xgwa.width, xgwa.height,xgwa.depth);
+ b = ba;
+ }
}
else
{
throbbers[i] = make_throbber (dpy, b, xgwa.width, xgwa.height,
colors[random() % ncolors].pixel);
- if (dbuf)
- {
- gcv.foreground = get_pixel_resource ("background", "Background",
- dpy, xgwa.colormap);
- erase_gc = XCreateGC (dpy, b, GCForeground, &gcv);
- XFillRectangle (dpy, ba, erase_gc, 0, 0, xgwa.width, xgwa.height);
- XFillRectangle (dpy, bb, erase_gc, 0, 0, xgwa.width, xgwa.height);
- }
+ gcv.foreground = get_pixel_resource ("background", "Background",
+ dpy, xgwa.colormap);
+ erase_gc = XCreateGC (dpy, b, GCForeground, &gcv);
+
+ if (ba) XFillRectangle (dpy, ba, erase_gc, 0, 0, xgwa.width, xgwa.height);
+ if (bb) XFillRectangle (dpy, bb, erase_gc, 0, 0, xgwa.width, xgwa.height);
while (1)
{
- if (dbuf)
+ if (!dbeclear_p
+#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
+ || !backb
+#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
+ )
XFillRectangle (dpy, b, erase_gc, 0, 0, xgwa.width, xgwa.height);
- else
- XClearWindow (dpy, b);
for (i = 0; i < count; i++)
if (throb (dpy, b, throbbers[i]) < 0)
throbbers[i] = make_throbber (dpy, b, xgwa.width, xgwa.height,
colors[random() % ncolors].pixel);
+
+#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
+ if (backb)
+ {
+ XdbeSwapInfo info[1];
+ info[0].swap_window = window;
+ info[0].swap_action = (dbeclear_p ? XdbeBackground : XdbeUndefined);
+ XdbeSwapBuffers (dpy, info, 1);
+ }
+ else
+#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
if (dbuf)
{
XCopyArea (dpy, b, window, erase_gc, 0, 0,
projects / xscreensaver / blobdiff