-void pseudocolor_startup(void)
-{
- XColor icolors[256];
- int tr, tg, tb, n, r, g, b, i, incolors, ii;
- unsigned long dev;
- int cpc, _ncolors;
- g_message("Initializing PseudoColor RenderControl\n");
-
- /* determine the number of colors and the bits-per-color */
- pseudo_bpc = 2; /* XXX THIS SHOULD BE A USER OPTION */
- g_assert(pseudo_bpc >= 1);
- _ncolors = pseudo_ncolors();
-
- if (_ncolors > 1 << render_depth) {
- g_warning("PseudoRenderControl: Invalid colormap size. Resizing.\n");
- pseudo_bpc = 1 << (render_depth/3) >> 3;
- _ncolors = 1 << (pseudo_bpc * 3);
- }
-
- /* build a color cube */
- pseudo_colors = malloc(_ncolors * sizeof(XColor));
- cpc = 1 << pseudo_bpc; /* colors per channel */
-
- for (n = 0, r = 0; r < cpc; r++)
- for (g = 0; g < cpc; g++)
- for (b = 0; b < cpc; b++, n++) {
- tr = (int)(((float)(r)/(float)(cpc-1)) * 0xFF);
- tg = (int)(((float)(g)/(float)(cpc-1)) * 0xFF);
- tb = (int)(((float)(b)/(float)(cpc-1)) * 0xFF);
- pseudo_colors[n].red = tr | tr << 8;
- pseudo_colors[n].green = tg | tg << 8;
- pseudo_colors[n].blue = tb | tb << 8;
- pseudo_colors[n].flags = DoRed|DoGreen|DoBlue; /* used to track
- allocation */
- }
-
- /* allocate the colors */
- for (i = 0; i < _ncolors; i++)
- if (!XAllocColor(ob_display, render_colormap, &pseudo_colors[i]))
- pseudo_colors[i].flags = 0; /* mark it as unallocated */
-
- /* try allocate any colors that failed allocation above */
-
- /* get the allocated values from the X server (only the first 256 XXX why!?)
- */
- incolors = (((1 << render_depth) > 256) ? 256 : (1 << render_depth));
- for (i = 0; i < incolors; i++)
- icolors[i].pixel = i;
- XQueryColors(ob_display, render_colormap, icolors, incolors);
-
- /* try match unallocated ones */
- for (i = 0; i < _ncolors; i++) {
- if (!pseudo_colors[i].flags) { /* if it wasn't allocated... */
- unsigned long closest = 0xffffffff, close = 0;
- for (ii = 0; ii < incolors; ii++) {
- /* find deviations */
- r = (pseudo_colors[i].red - icolors[ii].red) & 0xff;
- g = (pseudo_colors[i].green - icolors[ii].green) & 0xff;
- b = (pseudo_colors[i].blue - icolors[ii].blue) & 0xff;
- /* find a weighted absolute deviation */
- dev = (r * r) + (g * g) + (b * b);
-
- if (dev < closest) {
- closest = dev;
- close = ii;
- }
- }
-
- pseudo_colors[i].red = icolors[close].red;
- pseudo_colors[i].green = icolors[close].green;
- pseudo_colors[i].blue = icolors[close].blue;
- pseudo_colors[i].pixel = icolors[close].pixel;
-
- /* try alloc this closest color, it had better succeed! */
- if (XAllocColor(ob_display, render_colormap, &pseudo_colors[i]))
- pseudo_colors[i].flags = DoRed|DoGreen|DoBlue; /* mark as alloced */
- else
- g_assert(FALSE); /* wtf has gone wrong, its already alloced for
- chissake! */