1 /* xscreensaver, Copyright (c) 2001-2002 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 "images/logo-50.xpm"
37 #include "images/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 ((const char *) *data,
70 "%d %d %d %d %c", &w, &h, &ncolors, &nbytes, &c))
72 if (ncolors < 1 || ncolors > 255)
83 *mask_ret = (unsigned char *) malloc (s);
87 memset (*mask_ret, 255, s);
90 for (i = 0; i < ncolors; i++)
92 const unsigned char *line = *data;
93 cmap[i].byte = *line++;
98 while (*line == ' ' || *line == '\t')
101 if (which != 'c' && which != 'm')
103 while (*line == ' ' || *line == '\t')
105 if (!strncasecmp(line, "None", 4))
114 r = (hex[(int) line[0]] << 4) | hex[(int) line[1]]; line += 2;
115 g = (hex[(int) line[0]] << 4) | hex[(int) line[1]]; line += 2;
116 b = (hex[(int) line[0]] << 4) | hex[(int) line[1]]; line += 2;
136 if (depth == 1) transparent_color = 1;
138 pixels = (unsigned long *) calloc (ncolors+1, sizeof(*pixels));
140 for (i = 0; i < ncolors; i++)
142 if (cmap[i].cr == -1) /* transparent */
144 rmap[(int) cmap[i].byte] = 255;
149 color.flags = DoRed|DoGreen|DoBlue;
150 color.red = (cmap[i].cr << 8) | cmap[i].cr;
151 color.green = (cmap[i].cg << 8) | cmap[i].cg;
152 color.blue = (cmap[i].cb << 8) | cmap[i].cb;
154 !XAllocColor (dpy, colormap, &color))
156 color.red = (cmap[i].mr << 8) | cmap[i].mr;
157 color.green = (cmap[i].mg << 8) | cmap[i].mg;
158 color.blue = (cmap[i].mb << 8) | cmap[i].mb;
159 if (!XAllocColor (dpy, colormap, &color))
162 pixels[pixel_count] = color.pixel;
163 rmap[(int) cmap[i].byte] = pixel_count;
168 ximage = XCreateImage (dpy, visual, depth,
169 (depth == 1 ? XYBitmap : ZPixmap),
174 ximage->data = (char *) calloc (ximage->height, ximage->bytes_per_line);
175 for (y = 0; y < h; y++)
177 const unsigned char *line = *data++;
178 for (x = 0; x < w; x++)
180 int p = rmap[*line++];
181 XPutPixel (ximage, x, y,
182 (p == 255 ? transparent_color : pixels[p]));
184 if (p == 255 && mask_ret)
185 (*mask_ret)[(y * w8) + (x >> 3)] &= (~(1 << (x % 8)));
192 *pixels_ret = pixels;
193 *npixels_ret = pixel_count;
199 /* Draws the logo centered in the given Drawable (presumably a Pixmap.)
200 next_frame_p means randomize the flame shape.
203 xscreensaver_logo (Display *dpy, Window window, Colormap cmap,
204 unsigned long background_color,
205 unsigned long **pixels_ret, int *npixels_ret,
212 XWindowAttributes xgwa;
213 unsigned char *mask = 0;
215 XGetWindowAttributes (dpy, window, &xgwa);
217 image = parse_xpm_data (dpy, xgwa.visual, xgwa.colormap, xgwa.depth,
219 (big_p ? logo_180_xpm : logo_50_xpm),
220 &iw, &ih, pixels_ret, npixels_ret,
221 (mask_ret ? &mask : 0));
227 p = XCreatePixmap (dpy, window, iw, ih, xgwa.depth);
228 gc = XCreateGC (dpy, p, 0, &gcv);
229 XPutImage (dpy, p, gc, image, 0, 0, 0, 0, iw, ih);
232 XDestroyImage (image);
235 if (mask_ret && mask)
238 XCreatePixmapFromBitmapData (dpy, window, (char *) mask,