1 /* xscreensaver, Copyright (c) 2001 Jamie Zawinski <jwz@jwz.org>
3 * Permission to use, copy, modify, distribute, and sell this software and its
4 * documentation for any purpose is hereby granted without fee, provided that
5 * the above copyright notice appear in all copies and that both that
6 * copyright notice and this permission notice appear in supporting
7 * documentation. No representations are made about the suitability of this
8 * software for any purpose. It is provided "as is" without express or
12 /* XScreenSaver Logo designed by Angela Goodman <rzr_grl@yahoo.com>
15 /* I basically implemented libXPM here, because I don't want the
16 xscreensaver daemon to depend on libXPM for two reasons: first,
17 because I want the logo to show up even if libXPM is not installed
18 on the system; and second, I don't want to have to security-audit
19 libXPM. The fewer libraries that are linked into the xscreensaver
20 daemon, the more likely to be secure it is.
23 /* If you are looking in here because you're trying to figure out how to
24 change the logo that xscreensaver displays on the splash screen and
25 password dialog, please don't. The logo is xscreensaver's identity.
26 You wouldn't alter the name or copyright notice on a program that
27 you didn't write; please don't alter its logo either.
31 #include "resources.h"
34 #include <X11/Xutil.h>
36 #include "logo-50.xpm"
37 #include "logo-180.xpm"
39 static const char hex[128] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
40 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
41 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
42 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0,
43 0, 10,11,12,13,14,15,0, 0, 0, 0, 0, 0, 0, 0, 0,
44 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
45 0, 10,11,12,13,14,15,0, 0, 0, 0, 0, 0, 0, 0, 0,
46 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
49 parse_xpm_data (Display *dpy, Visual *visual, Colormap colormap, int depth,
50 unsigned long transparent_color,
51 unsigned const char * const * data,
52 int *width_ret, int *height_ret,
53 unsigned long **pixels_ret, int *npixels_ret)
55 int w, h, ncolors, nbytes;
60 int cr; int cg; int cb;
61 int mr; int mg; int mb;
63 unsigned char rmap[256];
65 unsigned long *pixels;
68 if (4 != sscanf (*data, "%d %d %d %d %c", &w, &h, &ncolors, &nbytes, &c))
70 if (ncolors < 1 || ncolors > 255)
75 for (i = 0; i < ncolors; i++)
77 const unsigned char *line = *data;
78 cmap[i].byte = *line++;
83 while (*line == ' ' || *line == '\t')
86 if (which != 'c' && which != 'm')
88 while (*line == ' ' || *line == '\t')
90 if (!strncasecmp(line, "None", 4))
99 r = (hex[(int) line[0]] << 4) | hex[(int) line[1]]; line += 2;
100 g = (hex[(int) line[0]] << 4) | hex[(int) line[1]]; line += 2;
101 b = (hex[(int) line[0]] << 4) | hex[(int) line[1]]; line += 2;
121 if (depth == 1) transparent_color = 1;
123 pixels = (unsigned long *) calloc (ncolors+1, sizeof(*pixels));
124 for (i = 0; i < ncolors; i++)
126 if (cmap[i].cr == -1) /* transparent */
128 rmap[(int) cmap[i].byte] = 255;
133 color.flags = DoRed|DoGreen|DoBlue;
134 color.red = (cmap[i].cr << 8) | cmap[i].cr;
135 color.green = (cmap[i].cg << 8) | cmap[i].cg;
136 color.blue = (cmap[i].cb << 8) | cmap[i].cb;
138 !XAllocColor (dpy, colormap, &color))
140 color.pixel = (cmap[i].mr ? 1 : 0);
142 pixels[i] = color.pixel;
143 rmap[(int) cmap[i].byte] = i;
147 ximage = XCreateImage (dpy, visual, depth,
148 (depth == 1 ? XYBitmap : ZPixmap),
153 ximage->data = (char *)
154 calloc ( ximage->height, ximage->bytes_per_line);
155 for (y = 0; y < h; y++)
157 const unsigned char *line = *data++;
158 for (x = 0; x < w; x++)
160 int p = rmap[*line++];
161 XPutPixel (ximage, x, y,
162 (p == 255 ? transparent_color : pixels[p]));
169 *pixels_ret = pixels;
170 *npixels_ret = ncolors;
176 /* Draws the logo centered in the given Drawable (presumably a Pixmap.)
177 next_frame_p means randomize the flame shape.
180 xscreensaver_logo (Display *dpy, Window window, Colormap cmap,
181 unsigned long background_color,
182 unsigned long **pixels_ret, int *npixels_ret,
186 unsigned long *pixels;
189 XWindowAttributes xgwa;
190 XGetWindowAttributes (dpy, window, &xgwa);
192 image = parse_xpm_data (dpy, xgwa.visual, xgwa.colormap, xgwa.depth,
194 (big_p ? logo_180_xpm : logo_50_xpm),
195 &iw, &ih, &pixels, &npixels);
200 p = XCreatePixmap (dpy, window, iw, ih, xgwa.depth);
201 gc = XCreateGC (dpy, p, 0, &gcv);
202 XPutImage (dpy, p, gc, image, 0, 0, 0, 0, iw, ih);
203 XDestroyImage (image);