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,
54 unsigned char **mask_ret)
56 int w, w8, h, ncolors, nbytes;
61 int cr; int cg; int cb;
62 int mr; int mg; int mb;
64 unsigned char rmap[256];
66 unsigned long *pixels;
69 if (4 != sscanf (*data, "%d %d %d %d %c", &w, &h, &ncolors, &nbytes, &c))
71 if (ncolors < 1 || ncolors > 255)
82 *mask_ret = (char *) malloc (s);
86 memset (*mask_ret, 255, s);
89 for (i = 0; i < ncolors; i++)
91 const unsigned char *line = *data;
92 cmap[i].byte = *line++;
97 while (*line == ' ' || *line == '\t')
100 if (which != 'c' && which != 'm')
102 while (*line == ' ' || *line == '\t')
104 if (!strncasecmp(line, "None", 4))
113 r = (hex[(int) line[0]] << 4) | hex[(int) line[1]]; line += 2;
114 g = (hex[(int) line[0]] << 4) | hex[(int) line[1]]; line += 2;
115 b = (hex[(int) line[0]] << 4) | hex[(int) line[1]]; line += 2;
135 if (depth == 1) transparent_color = 1;
137 pixels = (unsigned long *) calloc (ncolors+1, sizeof(*pixels));
138 for (i = 0; i < ncolors; i++)
140 if (cmap[i].cr == -1) /* transparent */
142 rmap[(int) cmap[i].byte] = 255;
147 color.flags = DoRed|DoGreen|DoBlue;
148 color.red = (cmap[i].cr << 8) | cmap[i].cr;
149 color.green = (cmap[i].cg << 8) | cmap[i].cg;
150 color.blue = (cmap[i].cb << 8) | cmap[i].cb;
152 !XAllocColor (dpy, colormap, &color))
154 color.pixel = (cmap[i].mr ? 1 : 0);
156 pixels[i] = color.pixel;
157 rmap[(int) cmap[i].byte] = i;
161 ximage = XCreateImage (dpy, visual, depth,
162 (depth == 1 ? XYBitmap : ZPixmap),
167 ximage->data = (char *)
168 calloc ( ximage->height, ximage->bytes_per_line);
169 for (y = 0; y < h; y++)
171 const unsigned char *line = *data++;
172 for (x = 0; x < w; x++)
174 int p = rmap[*line++];
175 XPutPixel (ximage, x, y,
176 (p == 255 ? transparent_color : pixels[p]));
178 if (p == 255 && mask_ret)
179 (*mask_ret)[(y * w8) + (x >> 3)] &= (~(1 << (x % 8)));
186 *pixels_ret = pixels;
187 *npixels_ret = ncolors;
193 /* Draws the logo centered in the given Drawable (presumably a Pixmap.)
194 next_frame_p means randomize the flame shape.
197 xscreensaver_logo (Display *dpy, Window window, Colormap cmap,
198 unsigned long background_color,
199 unsigned long **pixels_ret, int *npixels_ret,
204 unsigned long *pixels;
207 XWindowAttributes xgwa;
208 unsigned char *mask = 0;
210 XGetWindowAttributes (dpy, window, &xgwa);
212 image = parse_xpm_data (dpy, xgwa.visual, xgwa.colormap, xgwa.depth,
214 (big_p ? logo_180_xpm : logo_50_xpm),
215 &iw, &ih, &pixels, &npixels,
216 (mask_ret ? &mask : 0));
221 p = XCreatePixmap (dpy, window, iw, ih, xgwa.depth);
222 gc = XCreateGC (dpy, p, 0, &gcv);
223 XPutImage (dpy, p, gc, image, 0, 0, 0, 0, iw, ih);
224 XDestroyImage (image);
227 if (mask_ret && mask)
229 *mask_ret = XCreatePixmapFromBitmapData (dpy, window, mask,