Dogcows Code - chaz/openbox/blob - obrender/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) 2006        Mikael Magnusson
   5    Copyright (c) 2003-2007   Dana Jansens
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    See the COPYING file for a copy of the GNU General Public License.
  18 */
  19
  20 #include "render.h"
  21 #include "instance.h"
  22
  23 static RrInstance *definst = NULL;
  24
  25 static void RrTrueColorSetup (RrInstance *inst);
  26 static void RrPseudoColorSetup (RrInstance *inst);
  27
  28 #ifdef DEBUG
  29 #include "color.h"
  30 #endif
  31 static void
  32 dest(gpointer data)
  33 {
  34 #ifdef DEBUG
  35     RrColor *c = data;
  36     if (c->refcount > 0)
  37         g_error("color %d (%d,%d,%d) in hash table with %d "
  38                 "leftover references",
  39                 c->id, RrColorRed(c), RrColorGreen(c), RrColorBlue(c),
  40                 c->refcount);
  41 #endif
  42 }
  43
  44 #if 0
  45 static void f(gpointer key, gpointer value, gpointer n)
  46 {
  47     RrColor *c = value;
  48     if (c->id == *(gint*)n)
  49         g_message("color %d has %d references", c->id, c->refcount);
  50 }
  51
  52 void print_refs(gint id)
  53 {
  54     g_hash_table_foreach(RrColorHash(definst), f, &id);
  55 }
  56 #endif
  57
  58 RrInstance* RrInstanceNew (Display *display, gint screen)
  59 {
  60     definst = g_slice_new(RrInstance);
  61     definst->display = display;
  62     definst->screen = screen;
  63
  64     definst->depth = DefaultDepth(display, screen);
  65     definst->visual = DefaultVisual(display, screen);
  66     definst->colormap = DefaultColormap(display, screen);
  67     definst->pango = pango_xft_get_context(display, screen);
  68
  69     definst->pseudo_colors = NULL;
  70
  71     definst->color_hash = g_hash_table_new_full(g_int_hash, g_int_equal,
  72                                                 NULL, dest);
  73
  74     switch (definst->visual->class) {
  75     case TrueColor:
  76         RrTrueColorSetup(definst);
  77         break;
  78     case PseudoColor:
  79     case StaticColor:
  80     case GrayScale:
  81     case StaticGray:
  82         RrPseudoColorSetup(definst);
  83         break;
  84     default:
  85         g_critical("Unsupported visual class");
  86         g_free (definst);
  87         return definst = NULL;
  88     }
  89     return definst;
  90 }
  91
  92 static void RrTrueColorSetup (RrInstance *inst)
  93 {
  94   gulong red_mask, green_mask, blue_mask;
  95   XImage *timage = NULL;
  96
  97   timage = XCreateImage(inst->display, inst->visual, inst->depth,
  98                         ZPixmap, 0, NULL, 1, 1, 32, 0);
  99   g_assert(timage != NULL);
 100   /* find the offsets for each color in the visual's masks */
 101   inst->red_mask = red_mask = timage->red_mask;
 102   inst->green_mask = green_mask = timage->green_mask;
 103   inst->blue_mask = blue_mask = timage->blue_mask;
 104
 105   inst->red_offset = 0;
 106   inst->green_offset = 0;
 107   inst->blue_offset = 0;
 108
 109   while (! (red_mask & 1))   { inst->red_offset++;   red_mask   >>= 1; }
 110   while (! (green_mask & 1)) { inst->green_offset++; green_mask >>= 1; }
 111   while (! (blue_mask & 1))  { inst->blue_offset++;  blue_mask  >>= 1; }
 112
 113   inst->red_shift = inst->green_shift = inst->blue_shift = 8;
 114   while (red_mask)   { red_mask   >>= 1; inst->red_shift--;   }
 115   while (green_mask) { green_mask >>= 1; inst->green_shift--; }
 116   while (blue_mask)  { blue_mask  >>= 1; inst->blue_shift--;  }
 117   XFree(timage);
 118 }
 119
 120 #define RrPseudoNcolors(inst) (1 << (inst->pseudo_bpc * 3))
 121
 122 static void RrPseudoColorSetup (RrInstance *inst)
 123 {
 124     XColor icolors[256];
 125     gint tr, tg, tb, n, r, g, b, i, incolors, ii;
 126     gulong dev;
 127     gint cpc, _ncolors;
 128
 129     /* determine the number of colors and the bits-per-color */
 130     inst->pseudo_bpc = 2; /* XXX THIS SHOULD BE A USER OPTION */
 131     g_assert(inst->pseudo_bpc >= 1);
 132     _ncolors = RrPseudoNcolors(inst);
 133
 134     if (_ncolors > 1 << inst->depth) {
 135         g_message("Invalid colormap size. Resizing.");
 136         inst->pseudo_bpc = 1 << (inst->depth/3) >> 3;
 137         _ncolors = 1 << (inst->pseudo_bpc * 3);
 138     }
 139
 140     /* build a color cube */
 141     inst->pseudo_colors = g_new(XColor, _ncolors);
 142     cpc = 1 << inst->pseudo_bpc; /* colors per channel */
 143
 144     for (n = 0, r = 0; r < cpc; r++)
 145         for (g = 0; g < cpc; g++)
 146             for (b = 0; b < cpc; b++, n++) {
 147                 tr = (gint)(((gfloat)(r)/(gfloat)(cpc-1)) * 0xFF);
 148                 tg = (gint)(((gfloat)(g)/(gfloat)(cpc-1)) * 0xFF);
 149                 tb = (gint)(((gfloat)(b)/(gfloat)(cpc-1)) * 0xFF);
 150                 inst->pseudo_colors[n].red = tr | tr << 8;
 151                 inst->pseudo_colors[n].green = tg | tg << 8;
 152                 inst->pseudo_colors[n].blue = tb | tb << 8;
 153                 /* used to track allocation */
 154                 inst->pseudo_colors[n].flags = DoRed|DoGreen|DoBlue;
 155             }
 156
 157     /* allocate the colors */
 158     for (i = 0; i < _ncolors; i++)
 159         if (!XAllocColor(inst->display, inst->colormap,
 160                          &inst->pseudo_colors[i]))
 161             inst->pseudo_colors[i].flags = 0; /* mark it as unallocated */
 162
 163     /* try allocate any colors that failed allocation above */
 164
 165     /* get the allocated values from the X server
 166        (only the first 256 XXX why!?)
 167      */
 168     incolors = (((1 << inst->depth) > 256) ? 256 : (1 << inst->depth));
 169     for (i = 0; i < incolors; i++)
 170         icolors[i].pixel = i;
 171     XQueryColors(inst->display, inst->colormap, icolors, incolors);
 172
 173     /* try match unallocated ones */
 174     for (i = 0; i < _ncolors; i++) {
 175         if (!inst->pseudo_colors[i].flags) { /* if it wasn't allocated... */
 176             gulong closest = 0xffffffff, close = 0;
 177             for (ii = 0; ii < incolors; ii++) {
 178                 /* find deviations */
 179                 r = (inst->pseudo_colors[i].red - icolors[ii].red) & 0xff;
 180                 g = (inst->pseudo_colors[i].green - icolors[ii].green) & 0xff;
 181                 b = (inst->pseudo_colors[i].blue - icolors[ii].blue) & 0xff;
 182                 /* find a weighted absolute deviation */
 183                 dev = (r * r) + (g * g) + (b * b);
 184
 185                 if (dev < closest) {
 186                     closest = dev;
 187                     close = ii;
 188                 }
 189             }
 190
 191             inst->pseudo_colors[i].red = icolors[close].red;
 192             inst->pseudo_colors[i].green = icolors[close].green;
 193             inst->pseudo_colors[i].blue = icolors[close].blue;
 194             inst->pseudo_colors[i].pixel = icolors[close].pixel;
 195
 196             /* try alloc this closest color, it had better succeed! */
 197             if (XAllocColor(inst->display, inst->colormap,
 198                             &inst->pseudo_colors[i]))
 199                 /* mark as alloced */
 200                 inst->pseudo_colors[i].flags = DoRed|DoGreen|DoBlue;
 201             else
 202                 /* wtf has gone wrong, its already alloced for chissake! */
 203                 g_assert_not_reached();
 204         }
 205     }
 206 }
 207
 208 void RrInstanceFree (RrInstance *inst)
 209 {
 210     if (inst) {
 211         if (inst == definst) definst = NULL;
 212         g_free(inst->pseudo_colors);
 213         g_hash_table_destroy(inst->color_hash);
 214         g_object_unref(inst->pango);
 215         g_slice_free(RrInstance, inst);
 216     }
 217 }
 218
 219 Display* RrDisplay (const RrInstance *inst)
 220 {
 221     return (inst ? inst : definst)->display;
 222 }
 223
 224 gint RrScreen (const RrInstance *inst)
 225 {
 226     return (inst ? inst : definst)->screen;
 227 }
 228
 229 Window RrRootWindow (const RrInstance *inst)
 230 {
 231     return RootWindow (RrDisplay (inst), RrScreen (inst));
 232 }
 233
 234 Visual *RrVisual (const RrInstance *inst)
 235 {
 236     return (inst ? inst : definst)->visual;
 237 }
 238
 239 gint RrDepth (const RrInstance *inst)
 240 {
 241     return (inst ? inst : definst)->depth;
 242 }
 243
 244 Colormap RrColormap (const RrInstance *inst)
 245 {
 246     return (inst ? inst : definst)->colormap;
 247 }
 248
 249 gint RrRedOffset (const RrInstance *inst)
 250 {
 251     return (inst ? inst : definst)->red_offset;
 252 }
 253
 254 gint RrGreenOffset (const RrInstance *inst)
 255 {
 256     return (inst ? inst : definst)->green_offset;
 257 }
 258
 259 gint RrBlueOffset (const RrInstance *inst)
 260 {
 261     return (inst ? inst : definst)->blue_offset;
 262 }
 263
 264 gint RrRedShift (const RrInstance *inst)
 265 {
 266     return (inst ? inst : definst)->red_shift;
 267 }
 268
 269 gint RrGreenShift (const RrInstance *inst)
 270 {
 271     return (inst ? inst : definst)->green_shift;
 272 }
 273
 274 gint RrBlueShift (const RrInstance *inst)
 275 {
 276     return (inst ? inst : definst)->blue_shift;
 277 }
 278
 279 gint RrRedMask (const RrInstance *inst)
 280 {
 281     return (inst ? inst : definst)->red_mask;
 282 }
 283
 284 gint RrGreenMask (const RrInstance *inst)
 285 {
 286     return (inst ? inst : definst)->green_mask;
 287 }
 288
 289 gint RrBlueMask (const RrInstance *inst)
 290 {
 291     return (inst ? inst : definst)->blue_mask;
 292 }
 293
 294 guint RrPseudoBPC (const RrInstance *inst)
 295 {
 296     return (inst ? inst : definst)->pseudo_bpc;
 297 }
 298
 299 XColor *RrPseudoColors (const RrInstance *inst)
 300 {
 301     return (inst ? inst : definst)->pseudo_colors;
 302 }
 303
 304 GHashTable* RrColorHash (const RrInstance *inst)
 305 {
 306     return (inst ? inst : definst)->color_hash;
 307 }