Dogcows Code - chaz/openbox/blob - render/instance.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    instance.c for the Openbox window manager
   4    Copyright (c) 2003        Ben Jansens
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    See the COPYING file for a copy of the GNU General Public License.
  17 */
  18
  19 #include "render.h"
  20 #include "instance.h"
  21
  22 static RrInstance *definst = NULL;
  23
  24 static void RrTrueColorSetup (RrInstance *inst);
  25 static void RrPseudoColorSetup (RrInstance *inst);
  26
  27 RrInstance* RrInstanceNew (Display *display, gint screen)
  28 {
  29     definst = g_new (RrInstance, 1);
  30     definst->display = display;
  31     definst->screen = screen;
  32
  33     definst->depth = DefaultDepth(display, screen);
  34     definst->visual = DefaultVisual(display, screen);
  35     definst->colormap = DefaultColormap(display, screen);
  36
  37     definst->pseudo_colors = NULL;
  38
  39     definst->color_hash = g_hash_table_new(g_int_hash, g_int_equal);
  40
  41     switch (definst->visual->class) {
  42     case TrueColor:
  43         RrTrueColorSetup(definst);
  44         break;
  45     case PseudoColor:
  46     case StaticColor:
  47     case GrayScale:
  48     case StaticGray:
  49         RrPseudoColorSetup(definst);
  50         break;
  51     default:
  52         g_critical("Unsupported visual class");
  53         g_free (definst);
  54         return definst = NULL;
  55     }
  56     return definst;
  57 }
  58
  59 void RrTrueColorSetup (RrInstance *inst)
  60 {
  61   unsigned long red_mask, green_mask, blue_mask;
  62   XImage *timage = NULL;
  63
  64   timage = XCreateImage(inst->display, inst->visual, inst->depth,
  65                         ZPixmap, 0, NULL, 1, 1, 32, 0);
  66   g_assert(timage != NULL);
  67   /* find the offsets for each color in the visual's masks */
  68   inst->red_mask = red_mask = timage->red_mask;
  69   inst->green_mask = green_mask = timage->green_mask;
  70   inst->blue_mask = blue_mask = timage->blue_mask;
  71
  72   inst->red_offset = 0;
  73   inst->green_offset = 0;
  74   inst->blue_offset = 0;
  75
  76   while (! (red_mask & 1))   { inst->red_offset++;   red_mask   >>= 1; }
  77   while (! (green_mask & 1)) { inst->green_offset++; green_mask >>= 1; }
  78   while (! (blue_mask & 1))  { inst->blue_offset++;  blue_mask  >>= 1; }
  79
  80   inst->red_shift = inst->green_shift = inst->blue_shift = 8;
  81   while (red_mask)   { red_mask   >>= 1; inst->red_shift--;   }
  82   while (green_mask) { green_mask >>= 1; inst->green_shift--; }
  83   while (blue_mask)  { blue_mask  >>= 1; inst->blue_shift--;  }
  84   XFree(timage);
  85 }
  86
  87 #define RrPseudoNcolors(isnt) (1 << (inst->pseudo_bpc * 3))
  88
  89 void RrPseudoColorSetup (RrInstance *inst)
  90 {
  91     XColor icolors[256];
  92     int tr, tg, tb, n, r, g, b, i, incolors, ii;
  93     unsigned long dev;
  94     int cpc, _ncolors;
  95
  96     /* determine the number of colors and the bits-per-color */
  97     inst->pseudo_bpc = 2; /* XXX THIS SHOULD BE A USER OPTION */
  98     g_assert(inst->pseudo_bpc >= 1);
  99     _ncolors = RrPseudoNcolors(inst);
 100
 101     if (_ncolors > 1 << inst->depth) {
 102         g_warning("PseudoRenderControl: Invalid colormap size. Resizing.\n");
 103         inst->pseudo_bpc = 1 << (inst->depth/3) >> 3;
 104         _ncolors = 1 << (inst->pseudo_bpc * 3);
 105     }
 106
 107     /* build a color cube */
 108     inst->pseudo_colors = g_new(XColor, _ncolors);
 109     cpc = 1 << inst->pseudo_bpc; /* colors per channel */
 110
 111     for (n = 0, r = 0; r < cpc; r++)
 112         for (g = 0; g < cpc; g++)
 113             for (b = 0; b < cpc; b++, n++) {
 114                 tr = (int)(((float)(r)/(float)(cpc-1)) * 0xFF);
 115                 tg = (int)(((float)(g)/(float)(cpc-1)) * 0xFF);
 116                 tb = (int)(((float)(b)/(float)(cpc-1)) * 0xFF);
 117                 inst->pseudo_colors[n].red = tr | tr << 8;
 118                 inst->pseudo_colors[n].green = tg | tg << 8;
 119                 inst->pseudo_colors[n].blue = tb | tb << 8;
 120                 /* used to track allocation */
 121                 inst->pseudo_colors[n].flags = DoRed|DoGreen|DoBlue;
 122             }
 123
 124     /* allocate the colors */
 125     for (i = 0; i < _ncolors; i++)
 126         if (!XAllocColor(inst->display, inst->colormap,
 127                          &inst->pseudo_colors[i]))
 128             inst->pseudo_colors[i].flags = 0; /* mark it as unallocated */
 129
 130     /* try allocate any colors that failed allocation above */
 131
 132     /* get the allocated values from the X server
 133        (only the first 256 XXX why!?)
 134      */
 135     incolors = (((1 << inst->depth) > 256) ? 256 : (1 << inst->depth));
 136     for (i = 0; i < incolors; i++)
 137         icolors[i].pixel = i;
 138     XQueryColors(inst->display, inst->colormap, icolors, incolors);
 139
 140     /* try match unallocated ones */
 141     for (i = 0; i < _ncolors; i++) {
 142         if (!inst->pseudo_colors[i].flags) { /* if it wasn't allocated... */
 143             unsigned long closest = 0xffffffff, close = 0;
 144             for (ii = 0; ii < incolors; ii++) {
 145                 /* find deviations */
 146                 r = (inst->pseudo_colors[i].red - icolors[ii].red) & 0xff;
 147                 g = (inst->pseudo_colors[i].green - icolors[ii].green) & 0xff;
 148                 b = (inst->pseudo_colors[i].blue - icolors[ii].blue) & 0xff;
 149                 /* find a weighted absolute deviation */
 150                 dev = (r * r) + (g * g) + (b * b);
 151
 152                 if (dev < closest) {
 153                     closest = dev;
 154                     close = ii;
 155                 }
 156             }
 157
 158             inst->pseudo_colors[i].red = icolors[close].red;
 159             inst->pseudo_colors[i].green = icolors[close].green;
 160             inst->pseudo_colors[i].blue = icolors[close].blue;
 161             inst->pseudo_colors[i].pixel = icolors[close].pixel;
 162
 163             /* try alloc this closest color, it had better succeed! */
 164             if (XAllocColor(inst->display, inst->colormap,
 165                             &inst->pseudo_colors[i]))
 166                 /* mark as alloced */
 167                 inst->pseudo_colors[i].flags = DoRed|DoGreen|DoBlue;
 168             else
 169                 /* wtf has gone wrong, its already alloced for chissake! */
 170                 g_assert_not_reached();
 171         }
 172     }
 173 }
 174
 175 void RrInstanceFree (RrInstance *inst)
 176 {
 177     if (inst) {
 178         if (inst == definst) definst = NULL;
 179         g_free(inst->pseudo_colors);
 180         g_hash_table_destroy(inst->color_hash);
 181     }
 182 }
 183
 184 Display* RrDisplay (const RrInstance *inst)
 185 {
 186     return (inst ? inst : definst)->display;
 187 }
 188
 189 gint RrScreen (const RrInstance *inst)
 190 {
 191     return (inst ? inst : definst)->screen;
 192 }
 193
 194 Window RrRootWindow (const RrInstance *inst)
 195 {
 196     return RootWindow (RrDisplay (inst), RrScreen (inst));
 197 }
 198
 199 Visual *RrVisual (const RrInstance *inst)
 200 {
 201     return (inst ? inst : definst)->visual;
 202 }
 203
 204 gint RrDepth (const RrInstance *inst)
 205 {
 206     return (inst ? inst : definst)->depth;
 207 }
 208
 209 Colormap RrColormap (const RrInstance *inst)
 210 {
 211     return (inst ? inst : definst)->colormap;
 212 }
 213
 214 gint RrRedOffset (const RrInstance *inst)
 215 {
 216     return (inst ? inst : definst)->red_offset;
 217 }
 218
 219 gint RrGreenOffset (const RrInstance *inst)
 220 {
 221     return (inst ? inst : definst)->green_offset;
 222 }
 223
 224 gint RrBlueOffset (const RrInstance *inst)
 225 {
 226     return (inst ? inst : definst)->blue_offset;
 227 }
 228
 229 gint RrRedShift (const RrInstance *inst)
 230 {
 231     return (inst ? inst : definst)->red_shift;
 232 }
 233
 234 gint RrGreenShift (const RrInstance *inst)
 235 {
 236     return (inst ? inst : definst)->green_shift;
 237 }
 238
 239 gint RrBlueShift (const RrInstance *inst)
 240 {
 241     return (inst ? inst : definst)->blue_shift;
 242 }
 243
 244 gint RrRedMask (const RrInstance *inst)
 245 {
 246     return (inst ? inst : definst)->red_mask;
 247 }
 248
 249 gint RrGreenMask (const RrInstance *inst)
 250 {
 251     return (inst ? inst : definst)->green_mask;
 252 }
 253
 254 gint RrBlueMask (const RrInstance *inst)
 255 {
 256     return (inst ? inst : definst)->blue_mask;
 257 }
 258
 259 guint RrPseudoBPC (const RrInstance *inst)
 260 {
 261     return (inst ? inst : definst)->pseudo_bpc;
 262 }
 263
 264 XColor *RrPseudoColors (const RrInstance *inst)
 265 {
 266     return (inst ? inst : definst)->pseudo_colors;
 267 }
 268
 269 GHashTable* RrColorHash (const RrInstance *inst)
 270 {
 271     return (inst ? inst : definst)->color_hash;
 272 }