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 #ifdef DEBUG
  28 #include "color.h"
  29 #endif
  30 static void
  31 dest(gpointer data)
  32 {
  33 #ifdef DEBUG
  34     RrColor *c = data;
  35     if (c->refcount > 0)
  36         g_error("color %d (%d,%d,%d) in hash table with %d "
  37                 "leftover references",
  38                 c->id, RrColorRed(c), RrColorGreen(c), RrColorBlue(c),
  39                 c->refcount);
  40 #endif
  41 }
  42
  43 #if 0
  44 static void f(gpointer key, gpointer value, gpointer n)
  45 {
  46     RrColor *c = value;
  47     if (c->id == *(gint*)n)
  48         g_message("color %d has %d references", c->id, c->refcount);
  49 }
  50
  51 void print_refs(gint id)
  52 {
  53     g_hash_table_foreach(RrColorHash(definst), f, &id);
  54 }
  55 #endif
  56
  57 RrInstance* RrInstanceNew (Display *display, gint screen)
  58 {
  59     definst = g_new (RrInstance, 1);
  60     definst->display = display;
  61     definst->screen = screen;
  62
  63     definst->depth = DefaultDepth(display, screen);
  64     definst->visual = DefaultVisual(display, screen);
  65     definst->colormap = DefaultColormap(display, screen);
  66
  67     definst->pseudo_colors = NULL;
  68
  69     definst->color_hash = g_hash_table_new_full(g_int_hash, g_int_equal,
  70                                                 NULL, dest);
  71
  72     switch (definst->visual->class) {
  73     case TrueColor:
  74         RrTrueColorSetup(definst);
  75         break;
  76     case PseudoColor:
  77     case StaticColor:
  78     case GrayScale:
  79     case StaticGray:
  80         RrPseudoColorSetup(definst);
  81         break;
  82     default:
  83         g_critical("Unsupported visual class");
  84         g_free (definst);
  85         return definst = NULL;
  86     }
  87     return definst;
  88 }
  89
  90 void RrTrueColorSetup (RrInstance *inst)
  91 {
  92   gulong red_mask, green_mask, blue_mask;
  93   XImage *timage = NULL;
  94
  95   timage = XCreateImage(inst->display, inst->visual, inst->depth,
  96                         ZPixmap, 0, NULL, 1, 1, 32, 0);
  97   g_assert(timage != NULL);
  98   /* find the offsets for each color in the visual's masks */
  99   inst->red_mask = red_mask = timage->red_mask;
 100   inst->green_mask = green_mask = timage->green_mask;
 101   inst->blue_mask = blue_mask = timage->blue_mask;
 102
 103   inst->red_offset = 0;
 104   inst->green_offset = 0;
 105   inst->blue_offset = 0;
 106
 107   while (! (red_mask & 1))   { inst->red_offset++;   red_mask   >>= 1; }
 108   while (! (green_mask & 1)) { inst->green_offset++; green_mask >>= 1; }
 109   while (! (blue_mask & 1))  { inst->blue_offset++;  blue_mask  >>= 1; }
 110
 111   inst->red_shift = inst->green_shift = inst->blue_shift = 8;
 112   while (red_mask)   { red_mask   >>= 1; inst->red_shift--;   }
 113   while (green_mask) { green_mask >>= 1; inst->green_shift--; }
 114   while (blue_mask)  { blue_mask  >>= 1; inst->blue_shift--;  }
 115   XFree(timage);
 116 }
 117
 118 #define RrPseudoNcolors(isnt) (1 << (inst->pseudo_bpc * 3))
 119
 120 void RrPseudoColorSetup (RrInstance *inst)
 121 {
 122     XColor icolors[256];
 123     gint tr, tg, tb, n, r, g, b, i, incolors, ii;
 124     gulong dev;
 125     gint cpc, _ncolors;
 126
 127     /* determine the number of colors and the bits-per-color */
 128     inst->pseudo_bpc = 2; /* XXX THIS SHOULD BE A USER OPTION */
 129     g_assert(inst->pseudo_bpc >= 1);
 130     _ncolors = RrPseudoNcolors(inst);
 131
 132     if (_ncolors > 1 << inst->depth) {
 133         g_warning("PseudoRenderControl: Invalid colormap size. Resizing.\n");
 134         inst->pseudo_bpc = 1 << (inst->depth/3) >> 3;
 135         _ncolors = 1 << (inst->pseudo_bpc * 3);
 136     }
 137
 138     /* build a color cube */
 139     inst->pseudo_colors = g_new(XColor, _ncolors);
 140     cpc = 1 << inst->pseudo_bpc; /* colors per channel */
 141
 142     for (n = 0, r = 0; r < cpc; r++)
 143         for (g = 0; g < cpc; g++)
 144             for (b = 0; b < cpc; b++, n++) {
 145                 tr = (gint)(((gfloat)(r)/(gfloat)(cpc-1)) * 0xFF);
 146                 tg = (gint)(((gfloat)(g)/(gfloat)(cpc-1)) * 0xFF);
 147                 tb = (gint)(((gfloat)(b)/(gfloat)(cpc-1)) * 0xFF);
 148                 inst->pseudo_colors[n].red = tr | tr << 8;
 149                 inst->pseudo_colors[n].green = tg | tg << 8;
 150                 inst->pseudo_colors[n].blue = tb | tb << 8;
 151                 /* used to track allocation */
 152                 inst->pseudo_colors[n].flags = DoRed|DoGreen|DoBlue;
 153             }
 154
 155     /* allocate the colors */
 156     for (i = 0; i < _ncolors; i++)
 157         if (!XAllocColor(inst->display, inst->colormap,
 158                          &inst->pseudo_colors[i]))
 159             inst->pseudo_colors[i].flags = 0; /* mark it as unallocated */
 160
 161     /* try allocate any colors that failed allocation above */
 162
 163     /* get the allocated values from the X server
 164        (only the first 256 XXX why!?)
 165      */
 166     incolors = (((1 << inst->depth) > 256) ? 256 : (1 << inst->depth));
 167     for (i = 0; i < incolors; i++)
 168         icolors[i].pixel = i;
 169     XQueryColors(inst->display, inst->colormap, icolors, incolors);
 170
 171     /* try match unallocated ones */
 172     for (i = 0; i < _ncolors; i++) {
 173         if (!inst->pseudo_colors[i].flags) { /* if it wasn't allocated... */
 174             gulong closest = 0xffffffff, close = 0;
 175             for (ii = 0; ii < incolors; ii++) {
 176                 /* find deviations */
 177                 r = (inst->pseudo_colors[i].red - icolors[ii].red) & 0xff;
 178                 g = (inst->pseudo_colors[i].green - icolors[ii].green) & 0xff;
 179                 b = (inst->pseudo_colors[i].blue - icolors[ii].blue) & 0xff;
 180                 /* find a weighted absolute deviation */
 181                 dev = (r * r) + (g * g) + (b * b);
 182
 183                 if (dev < closest) {
 184                     closest = dev;
 185                     close = ii;
 186                 }
 187             }
 188
 189             inst->pseudo_colors[i].red = icolors[close].red;
 190             inst->pseudo_colors[i].green = icolors[close].green;
 191             inst->pseudo_colors[i].blue = icolors[close].blue;
 192             inst->pseudo_colors[i].pixel = icolors[close].pixel;
 193
 194             /* try alloc this closest color, it had better succeed! */
 195             if (XAllocColor(inst->display, inst->colormap,
 196                             &inst->pseudo_colors[i]))
 197                 /* mark as alloced */
 198                 inst->pseudo_colors[i].flags = DoRed|DoGreen|DoBlue;
 199             else
 200                 /* wtf has gone wrong, its already alloced for chissake! */
 201                 g_assert_not_reached();
 202         }
 203     }
 204 }
 205
 206 void RrInstanceFree (RrInstance *inst)
 207 {
 208     if (inst) {
 209         if (inst == definst) definst = NULL;
 210         g_free(inst->pseudo_colors);
 211         g_hash_table_destroy(inst->color_hash);
 212     }
 213 }
 214
 215 Display* RrDisplay (const RrInstance *inst)
 216 {
 217     return (inst ? inst : definst)->display;
 218 }
 219
 220 gint RrScreen (const RrInstance *inst)
 221 {
 222     return (inst ? inst : definst)->screen;
 223 }
 224
 225 Window RrRootWindow (const RrInstance *inst)
 226 {
 227     return RootWindow (RrDisplay (inst), RrScreen (inst));
 228 }
 229
 230 Visual *RrVisual (const RrInstance *inst)
 231 {
 232     return (inst ? inst : definst)->visual;
 233 }
 234
 235 gint RrDepth (const RrInstance *inst)
 236 {
 237     return (inst ? inst : definst)->depth;
 238 }
 239
 240 Colormap RrColormap (const RrInstance *inst)
 241 {
 242     return (inst ? inst : definst)->colormap;
 243 }
 244
 245 gint RrRedOffset (const RrInstance *inst)
 246 {
 247     return (inst ? inst : definst)->red_offset;
 248 }
 249
 250 gint RrGreenOffset (const RrInstance *inst)
 251 {
 252     return (inst ? inst : definst)->green_offset;
 253 }
 254
 255 gint RrBlueOffset (const RrInstance *inst)
 256 {
 257     return (inst ? inst : definst)->blue_offset;
 258 }
 259
 260 gint RrRedShift (const RrInstance *inst)
 261 {
 262     return (inst ? inst : definst)->red_shift;
 263 }
 264
 265 gint RrGreenShift (const RrInstance *inst)
 266 {
 267     return (inst ? inst : definst)->green_shift;
 268 }
 269
 270 gint RrBlueShift (const RrInstance *inst)
 271 {
 272     return (inst ? inst : definst)->blue_shift;
 273 }
 274
 275 gint RrRedMask (const RrInstance *inst)
 276 {
 277     return (inst ? inst : definst)->red_mask;
 278 }
 279
 280 gint RrGreenMask (const RrInstance *inst)
 281 {
 282     return (inst ? inst : definst)->green_mask;
 283 }
 284
 285 gint RrBlueMask (const RrInstance *inst)
 286 {
 287     return (inst ? inst : definst)->blue_mask;
 288 }
 289
 290 guint RrPseudoBPC (const RrInstance *inst)
 291 {
 292     return (inst ? inst : definst)->pseudo_bpc;
 293 }
 294
 295 XColor *RrPseudoColors (const RrInstance *inst)
 296 {
 297     return (inst ? inst : definst)->pseudo_colors;
 298 }
 299
 300 GHashTable* RrColorHash (const RrInstance *inst)
 301 {
 302     return (inst ? inst : definst)->color_hash;
 303 }