render/instance.c (raw)
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#include "render.h" #include "instance.h" static RrInstance *definst = NULL; static void RrTrueColorSetup (RrInstance *inst); static void RrPseudoColorSetup (RrInstance *inst); RrInstance* RrInstanceNew (Display *display, gint screen) { definst = g_new (RrInstance, 1); definst->display = display; definst->screen = screen; definst->depth = DefaultDepth(display, screen); definst->visual = DefaultVisual(display, screen); definst->colormap = DefaultColormap(display, screen); definst->pseudo_colors = NULL; definst->color_hash = g_hash_table_new(g_int_hash, g_int_equal); switch (definst->visual->class) { case TrueColor: RrTrueColorSetup(definst); break; case PseudoColor: case StaticColor: case GrayScale: case StaticGray: RrPseudoColorSetup(definst); break; default: g_critical("Unsupported visual class"); g_free (definst); return definst = NULL; } return definst; } void RrTrueColorSetup (RrInstance *inst) { unsigned long red_mask, green_mask, blue_mask; XImage *timage = NULL; timage = XCreateImage(inst->display, inst->visual, inst->depth, ZPixmap, 0, NULL, 1, 1, 32, 0); g_assert(timage != NULL); /* find the offsets for each color in the visual's masks */ inst->red_mask = red_mask = timage->red_mask; inst->green_mask = green_mask = timage->green_mask; inst->blue_mask = blue_mask = timage->blue_mask; inst->red_offset = 0; inst->green_offset = 0; inst->blue_offset = 0; while (! (red_mask & 1)) { inst->red_offset++; red_mask >>= 1; } while (! (green_mask & 1)) { inst->green_offset++; green_mask >>= 1; } while (! (blue_mask & 1)) { inst->blue_offset++; blue_mask >>= 1; } inst->red_shift = inst->green_shift = inst->blue_shift = 8; while (red_mask) { red_mask >>= 1; inst->red_shift--; } while (green_mask) { green_mask >>= 1; inst->green_shift--; } while (blue_mask) { blue_mask >>= 1; inst->blue_shift--; } XFree(timage); } #define RrPseudoNcolors(isnt) (1 << (inst->pseudo_bpc * 3)) void RrPseudoColorSetup (RrInstance *inst) { XColor icolors[256]; int tr, tg, tb, n, r, g, b, i, incolors, ii; unsigned long dev; int cpc, _ncolors; /* determine the number of colors and the bits-per-color */ inst->pseudo_bpc = 2; /* XXX THIS SHOULD BE A USER OPTION */ g_assert(inst->pseudo_bpc >= 1); _ncolors = RrPseudoNcolors(inst); if (_ncolors > 1 << inst->depth) { g_warning("PseudoRenderControl: Invalid colormap size. Resizing.\n"); inst->pseudo_bpc = 1 << (inst->depth/3) >> 3; _ncolors = 1 << (inst->pseudo_bpc * 3); } /* build a color cube */ inst->pseudo_colors = g_new(XColor, _ncolors); cpc = 1 << inst->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); inst->pseudo_colors[n].red = tr | tr << 8; inst->pseudo_colors[n].green = tg | tg << 8; inst->pseudo_colors[n].blue = tb | tb << 8; /* used to track allocation */ inst->pseudo_colors[n].flags = DoRed|DoGreen|DoBlue; } /* allocate the colors */ for (i = 0; i < _ncolors; i++) if (!XAllocColor(inst->display, inst->colormap, &inst->pseudo_colors[i])) inst->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 << inst->depth) > 256) ? 256 : (1 << inst->depth)); for (i = 0; i < incolors; i++) icolors[i].pixel = i; XQueryColors(inst->display, inst->colormap, icolors, incolors); /* try match unallocated ones */ for (i = 0; i < _ncolors; i++) { if (!inst->pseudo_colors[i].flags) { /* if it wasn't allocated... */ unsigned long closest = 0xffffffff, close = 0; for (ii = 0; ii < incolors; ii++) { /* find deviations */ r = (inst->pseudo_colors[i].red - icolors[ii].red) & 0xff; g = (inst->pseudo_colors[i].green - icolors[ii].green) & 0xff; b = (inst->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; } } inst->pseudo_colors[i].red = icolors[close].red; inst->pseudo_colors[i].green = icolors[close].green; inst->pseudo_colors[i].blue = icolors[close].blue; inst->pseudo_colors[i].pixel = icolors[close].pixel; /* try alloc this closest color, it had better succeed! */ if (XAllocColor(inst->display, inst->colormap, &inst->pseudo_colors[i])) /* mark as alloced */ inst->pseudo_colors[i].flags = DoRed|DoGreen|DoBlue; else /* wtf has gone wrong, its already alloced for chissake! */ g_assert_not_reached(); } } } void RrInstanceFree (RrInstance *inst) { if (inst) { if (inst == definst) definst = NULL; g_free(inst->pseudo_colors); g_hash_table_destroy(inst->color_hash); } } Display* RrDisplay (const RrInstance *inst) { return (inst ? inst : definst)->display; } gint RrScreen (const RrInstance *inst) { return (inst ? inst : definst)->screen; } Window RrRootWindow (const RrInstance *inst) { return RootWindow (RrDisplay (inst), RrScreen (inst)); } Visual *RrVisual (const RrInstance *inst) { return (inst ? inst : definst)->visual; } gint RrDepth (const RrInstance *inst) { return (inst ? inst : definst)->depth; } Colormap RrColormap (const RrInstance *inst) { return (inst ? inst : definst)->colormap; } gint RrRedOffset (const RrInstance *inst) { return (inst ? inst : definst)->red_offset; } gint RrGreenOffset (const RrInstance *inst) { return (inst ? inst : definst)->green_offset; } gint RrBlueOffset (const RrInstance *inst) { return (inst ? inst : definst)->blue_offset; } gint RrRedShift (const RrInstance *inst) { return (inst ? inst : definst)->red_shift; } gint RrGreenShift (const RrInstance *inst) { return (inst ? inst : definst)->green_shift; } gint RrBlueShift (const RrInstance *inst) { return (inst ? inst : definst)->blue_shift; } gint RrRedMask (const RrInstance *inst) { return (inst ? inst : definst)->red_mask; } gint RrGreenMask (const RrInstance *inst) { return (inst ? inst : definst)->green_mask; } gint RrBlueMask (const RrInstance *inst) { return (inst ? inst : definst)->blue_mask; } guint RrPseudoBPC (const RrInstance *inst) { return (inst ? inst : definst)->pseudo_bpc; } XColor *RrPseudoColors (const RrInstance *inst) { return (inst ? inst : definst)->pseudo_colors; } GHashTable* RrColorHash (const RrInstance *inst) { return (inst ? inst : definst)->color_hash; } |