-void render_startup(void)
-{
- paint = x_paint;
-
- render_depth = DefaultDepth(ob_display, ob_screen);
- render_visual = DefaultVisual(ob_display, ob_screen);
- render_colormap = DefaultColormap(ob_display, ob_screen);
-
- if (render_depth < 8) {
- XVisualInfo vinfo_template, *vinfo_return;
- /* search for a TrueColor Visual... if we can't find one...
- we will use the default visual for the screen */
- int vinfo_nitems;
- int best = -1;
-
- vinfo_template.screen = ob_screen;
- vinfo_template.class = TrueColor;
- vinfo_return = XGetVisualInfo(ob_display,
- VisualScreenMask | VisualClassMask,
- &vinfo_template, &vinfo_nitems);
- if (vinfo_return) {
- int i;
- int max_depth = 1;
- for (i = 0; i < vinfo_nitems; ++i) {
- if (vinfo_return[i].depth > max_depth) {
- if (max_depth == 24 && vinfo_return[i].depth > 24)
- break; /* prefer 24 bit over 32 */
- max_depth = vinfo_return[i].depth;
- best = i;
- }
- }
- if (max_depth < render_depth) best = -1;
- }
- if (best != -1) {
- render_depth = vinfo_return[best].depth;
- render_visual = vinfo_return[best].visual;
- render_colormap = XCreateColormap(ob_display, ob_root, render_visual,
- AllocNone);
- }
- XFree(vinfo_return);
- }
- switch (render_visual->class) {
- case TrueColor:
- truecolor_startup();
- break;
- case PseudoColor:
- case StaticColor:
- case GrayScale:
- case StaticGray:
- pseudocolor_startup();
- break;
- default:
- g_critical("unsupported visual class.\n");
- exit(EXIT_FAILURE);
-
- }
-}
-
-void truecolor_startup(void)
-{
- unsigned long red_mask, green_mask, blue_mask;
- XImage *timage = NULL;
-
- timage = XCreateImage(ob_display, render_visual, render_depth,
- ZPixmap, 0, NULL, 1, 1, 32, 0);
- g_assert(timage != NULL);
- /* find the offsets for each color in the visual's masks */
- red_mask = timage->red_mask;
- green_mask = timage->green_mask;
- blue_mask = timage->blue_mask;
-
- render_red_offset = 0;
- render_green_offset = 0;
- render_blue_offset = 0;
-
- while (! (red_mask & 1)) { render_red_offset++; red_mask >>= 1; }
- while (! (green_mask & 1)) { render_green_offset++; green_mask >>= 1; }
- while (! (blue_mask & 1)) { render_blue_offset++; blue_mask >>= 1; }
-
- render_red_shift = render_green_shift = render_blue_shift = 8;
- while (red_mask) { red_mask >>= 1; render_red_shift--; }
- while (green_mask) { green_mask >>= 1; render_green_shift--; }
- while (blue_mask) { blue_mask >>= 1; render_blue_shift--; }
- XFree(timage);
-}
-
-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 = 1 << (pseudo_bpc * 3);
-
- 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! */
- }
- }
-}
-
-void x_paint(Window win, Appearance *l)