309 lines
8.9 KiB
C
309 lines
8.9 KiB
C
/* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
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instance.c for the Openbox window manager
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Copyright (c) 2006 Mikael Magnusson
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Copyright (c) 2003-2007 Dana Jansens
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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See the COPYING file for a copy of the GNU General Public License.
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*/
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#include "render.h"
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#include "instance.h"
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static RrInstance *definst = NULL;
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static void RrTrueColorSetup (RrInstance *inst);
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static void RrPseudoColorSetup (RrInstance *inst);
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#ifdef DEBUG
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#include "color.h"
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#endif
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static void
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dest(gpointer data)
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{
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#ifdef DEBUG
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RrColor *c = data;
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if (c->refcount > 0)
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g_error("color %d (%d,%d,%d) in hash table with %d "
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"leftover references",
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c->id, RrColorRed(c), RrColorGreen(c), RrColorBlue(c),
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c->refcount);
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#endif
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}
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#if 0
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static void f(gpointer key, gpointer value, gpointer n)
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{
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RrColor *c = value;
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if (c->id == *(gint*)n)
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g_message("color %d has %d references", c->id, c->refcount);
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}
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void print_refs(gint id)
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{
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g_hash_table_foreach(RrColorHash(definst), f, &id);
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}
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#endif
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RrInstance* RrInstanceNew (Display *display, gint screen)
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{
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g_type_init(); /* supposedly needed for pango but seems to work without */
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definst = g_new (RrInstance, 1);
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definst->display = display;
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definst->screen = screen;
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definst->depth = DefaultDepth(display, screen);
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definst->visual = DefaultVisual(display, screen);
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definst->colormap = DefaultColormap(display, screen);
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definst->pango = pango_xft_get_context(display, screen);
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definst->pseudo_colors = NULL;
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definst->color_hash = g_hash_table_new_full(g_int_hash, g_int_equal,
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NULL, dest);
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switch (definst->visual->class) {
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case TrueColor:
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RrTrueColorSetup(definst);
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break;
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case PseudoColor:
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case StaticColor:
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case GrayScale:
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case StaticGray:
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RrPseudoColorSetup(definst);
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break;
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default:
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g_critical("Unsupported visual class");
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g_free (definst);
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return definst = NULL;
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}
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return definst;
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}
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void RrTrueColorSetup (RrInstance *inst)
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{
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gulong red_mask, green_mask, blue_mask;
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XImage *timage = NULL;
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timage = XCreateImage(inst->display, inst->visual, inst->depth,
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ZPixmap, 0, NULL, 1, 1, 32, 0);
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g_assert(timage != NULL);
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/* find the offsets for each color in the visual's masks */
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inst->red_mask = red_mask = timage->red_mask;
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inst->green_mask = green_mask = timage->green_mask;
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inst->blue_mask = blue_mask = timage->blue_mask;
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inst->red_offset = 0;
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inst->green_offset = 0;
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inst->blue_offset = 0;
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while (! (red_mask & 1)) { inst->red_offset++; red_mask >>= 1; }
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while (! (green_mask & 1)) { inst->green_offset++; green_mask >>= 1; }
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while (! (blue_mask & 1)) { inst->blue_offset++; blue_mask >>= 1; }
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inst->red_shift = inst->green_shift = inst->blue_shift = 8;
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while (red_mask) { red_mask >>= 1; inst->red_shift--; }
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while (green_mask) { green_mask >>= 1; inst->green_shift--; }
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while (blue_mask) { blue_mask >>= 1; inst->blue_shift--; }
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XFree(timage);
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}
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#define RrPseudoNcolors(inst) (1 << (inst->pseudo_bpc * 3))
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void RrPseudoColorSetup (RrInstance *inst)
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{
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XColor icolors[256];
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gint tr, tg, tb, n, r, g, b, i, incolors, ii;
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gulong dev;
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gint cpc, _ncolors;
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/* determine the number of colors and the bits-per-color */
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inst->pseudo_bpc = 2; /* XXX THIS SHOULD BE A USER OPTION */
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g_assert(inst->pseudo_bpc >= 1);
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_ncolors = RrPseudoNcolors(inst);
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if (_ncolors > 1 << inst->depth) {
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g_message("Invalid colormap size. Resizing.");
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inst->pseudo_bpc = 1 << (inst->depth/3) >> 3;
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_ncolors = 1 << (inst->pseudo_bpc * 3);
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}
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/* build a color cube */
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inst->pseudo_colors = g_new(XColor, _ncolors);
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cpc = 1 << inst->pseudo_bpc; /* colors per channel */
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for (n = 0, r = 0; r < cpc; r++)
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for (g = 0; g < cpc; g++)
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for (b = 0; b < cpc; b++, n++) {
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tr = (gint)(((gfloat)(r)/(gfloat)(cpc-1)) * 0xFF);
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tg = (gint)(((gfloat)(g)/(gfloat)(cpc-1)) * 0xFF);
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tb = (gint)(((gfloat)(b)/(gfloat)(cpc-1)) * 0xFF);
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inst->pseudo_colors[n].red = tr | tr << 8;
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inst->pseudo_colors[n].green = tg | tg << 8;
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inst->pseudo_colors[n].blue = tb | tb << 8;
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/* used to track allocation */
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inst->pseudo_colors[n].flags = DoRed|DoGreen|DoBlue;
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}
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/* allocate the colors */
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for (i = 0; i < _ncolors; i++)
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if (!XAllocColor(inst->display, inst->colormap,
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&inst->pseudo_colors[i]))
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inst->pseudo_colors[i].flags = 0; /* mark it as unallocated */
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/* try allocate any colors that failed allocation above */
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/* get the allocated values from the X server
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(only the first 256 XXX why!?)
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*/
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incolors = (((1 << inst->depth) > 256) ? 256 : (1 << inst->depth));
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for (i = 0; i < incolors; i++)
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icolors[i].pixel = i;
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XQueryColors(inst->display, inst->colormap, icolors, incolors);
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/* try match unallocated ones */
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for (i = 0; i < _ncolors; i++) {
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if (!inst->pseudo_colors[i].flags) { /* if it wasn't allocated... */
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gulong closest = 0xffffffff, close = 0;
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for (ii = 0; ii < incolors; ii++) {
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/* find deviations */
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r = (inst->pseudo_colors[i].red - icolors[ii].red) & 0xff;
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g = (inst->pseudo_colors[i].green - icolors[ii].green) & 0xff;
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b = (inst->pseudo_colors[i].blue - icolors[ii].blue) & 0xff;
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/* find a weighted absolute deviation */
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dev = (r * r) + (g * g) + (b * b);
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if (dev < closest) {
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closest = dev;
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close = ii;
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}
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}
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inst->pseudo_colors[i].red = icolors[close].red;
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inst->pseudo_colors[i].green = icolors[close].green;
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inst->pseudo_colors[i].blue = icolors[close].blue;
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inst->pseudo_colors[i].pixel = icolors[close].pixel;
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/* try alloc this closest color, it had better succeed! */
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if (XAllocColor(inst->display, inst->colormap,
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&inst->pseudo_colors[i]))
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/* mark as alloced */
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inst->pseudo_colors[i].flags = DoRed|DoGreen|DoBlue;
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else
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/* wtf has gone wrong, its already alloced for chissake! */
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g_assert_not_reached();
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}
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}
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}
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void RrInstanceFree (RrInstance *inst)
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{
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if (inst) {
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if (inst == definst) definst = NULL;
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g_free(inst->pseudo_colors);
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g_hash_table_destroy(inst->color_hash);
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g_object_unref(inst->pango);
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g_free(inst);
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}
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}
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Display* RrDisplay (const RrInstance *inst)
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{
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return (inst ? inst : definst)->display;
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}
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gint RrScreen (const RrInstance *inst)
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{
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return (inst ? inst : definst)->screen;
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}
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Window RrRootWindow (const RrInstance *inst)
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{
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return RootWindow (RrDisplay (inst), RrScreen (inst));
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}
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Visual *RrVisual (const RrInstance *inst)
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{
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return (inst ? inst : definst)->visual;
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}
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gint RrDepth (const RrInstance *inst)
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{
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return (inst ? inst : definst)->depth;
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}
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Colormap RrColormap (const RrInstance *inst)
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{
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return (inst ? inst : definst)->colormap;
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}
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gint RrRedOffset (const RrInstance *inst)
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{
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return (inst ? inst : definst)->red_offset;
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}
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gint RrGreenOffset (const RrInstance *inst)
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{
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return (inst ? inst : definst)->green_offset;
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}
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gint RrBlueOffset (const RrInstance *inst)
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{
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return (inst ? inst : definst)->blue_offset;
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}
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gint RrRedShift (const RrInstance *inst)
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{
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return (inst ? inst : definst)->red_shift;
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}
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gint RrGreenShift (const RrInstance *inst)
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{
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return (inst ? inst : definst)->green_shift;
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}
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gint RrBlueShift (const RrInstance *inst)
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{
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return (inst ? inst : definst)->blue_shift;
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}
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gint RrRedMask (const RrInstance *inst)
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{
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return (inst ? inst : definst)->red_mask;
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}
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gint RrGreenMask (const RrInstance *inst)
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{
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return (inst ? inst : definst)->green_mask;
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}
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gint RrBlueMask (const RrInstance *inst)
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{
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return (inst ? inst : definst)->blue_mask;
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}
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guint RrPseudoBPC (const RrInstance *inst)
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{
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return (inst ? inst : definst)->pseudo_bpc;
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}
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XColor *RrPseudoColors (const RrInstance *inst)
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{
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return (inst ? inst : definst)->pseudo_colors;
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}
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GHashTable* RrColorHash (const RrInstance *inst)
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{
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return (inst ? inst : definst)->color_hash;
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}
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