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

   1 #include "render.h"
   2 #include "instance.h"
   3
   4 static RrInstance *definst = NULL;
   5
   6 static void RrTrueColorSetup (RrInstance *inst);
   7 static void RrPseudoColorSetup (RrInstance *inst);
   8
   9 RrInstance* RrInstanceNew (Display *display, gint screen)
  10 {
  11     definst = g_new (RrInstance, 1);
  12     definst->display = display;
  13     definst->screen = screen;
  14
  15     definst->depth = DefaultDepth(display, screen);
  16     definst->visual = DefaultVisual(display, screen);
  17     definst->colormap = DefaultColormap(display, screen);
  18
  19     definst->pseudo_colors = NULL;
  20
  21     definst->color_hash = g_hash_table_new(g_int_hash, g_int_equal);
  22
  23     switch (definst->visual->class) {
  24     case TrueColor:
  25         RrTrueColorSetup(definst);
  26         break;
  27     case PseudoColor:
  28     case StaticColor:
  29     case GrayScale:
  30     case StaticGray:
  31         RrPseudoColorSetup(definst);
  32         break;
  33     default:
  34         g_critical("Unsupported visual class");
  35         g_free (definst);
  36         return definst = NULL;
  37     }
  38     return definst;
  39 }
  40
  41 void RrTrueColorSetup (RrInstance *inst)
  42 {
  43   unsigned long red_mask, green_mask, blue_mask;
  44   XImage *timage = NULL;
  45
  46   timage = XCreateImage(inst->display, inst->visual, inst->depth,
  47                         ZPixmap, 0, NULL, 1, 1, 32, 0);
  48   g_assert(timage != NULL);
  49   /* find the offsets for each color in the visual's masks */
  50   inst->red_mask = red_mask = timage->red_mask;
  51   inst->green_mask = green_mask = timage->green_mask;
  52   inst->blue_mask = blue_mask = timage->blue_mask;
  53
  54   inst->red_offset = 0;
  55   inst->green_offset = 0;
  56   inst->blue_offset = 0;
  57
  58   while (! (red_mask & 1))   { inst->red_offset++;   red_mask   >>= 1; }
  59   while (! (green_mask & 1)) { inst->green_offset++; green_mask >>= 1; }
  60   while (! (blue_mask & 1))  { inst->blue_offset++;  blue_mask  >>= 1; }
  61
  62   inst->red_shift = inst->green_shift = inst->blue_shift = 8;
  63   while (red_mask)   { red_mask   >>= 1; inst->red_shift--;   }
  64   while (green_mask) { green_mask >>= 1; inst->green_shift--; }
  65   while (blue_mask)  { blue_mask  >>= 1; inst->blue_shift--;  }
  66   XFree(timage);
  67 }
  68
  69 #define RrPseudoNcolors(isnt) (1 << (inst->pseudo_bpc * 3))
  70
  71 void RrPseudoColorSetup (RrInstance *inst)
  72 {
  73     XColor icolors[256];
  74     int tr, tg, tb, n, r, g, b, i, incolors, ii;
  75     unsigned long dev;
  76     int cpc, _ncolors;
  77
  78     /* determine the number of colors and the bits-per-color */
  79     inst->pseudo_bpc = 2; /* XXX THIS SHOULD BE A USER OPTION */
  80     g_assert(inst->pseudo_bpc >= 1);
  81     _ncolors = RrPseudoNcolors(inst);
  82
  83     if (_ncolors > 1 << inst->depth) {
  84         g_warning("PseudoRenderControl: Invalid colormap size. Resizing.\n");
  85         inst->pseudo_bpc = 1 << (inst->depth/3) >> 3;
  86         _ncolors = 1 << (inst->pseudo_bpc * 3);
  87     }
  88
  89     /* build a color cube */
  90     inst->pseudo_colors = g_new(XColor, _ncolors);
  91     cpc = 1 << inst->pseudo_bpc; /* colors per channel */
  92
  93     for (n = 0, r = 0; r < cpc; r++)
  94         for (g = 0; g < cpc; g++)
  95             for (b = 0; b < cpc; b++, n++) {
  96                 tr = (int)(((float)(r)/(float)(cpc-1)) * 0xFF);
  97                 tg = (int)(((float)(g)/(float)(cpc-1)) * 0xFF);
  98                 tb = (int)(((float)(b)/(float)(cpc-1)) * 0xFF);
  99                 inst->pseudo_colors[n].red = tr | tr << 8;
 100                 inst->pseudo_colors[n].green = tg | tg << 8;
 101                 inst->pseudo_colors[n].blue = tb | tb << 8;
 102                 /* used to track allocation */
 103                 inst->pseudo_colors[n].flags = DoRed|DoGreen|DoBlue;
 104             }
 105
 106     /* allocate the colors */
 107     for (i = 0; i < _ncolors; i++)
 108         if (!XAllocColor(inst->display, inst->colormap,
 109                          &inst->pseudo_colors[i]))
 110             inst->pseudo_colors[i].flags = 0; /* mark it as unallocated */
 111
 112     /* try allocate any colors that failed allocation above */
 113
 114     /* get the allocated values from the X server
 115        (only the first 256 XXX why!?)
 116      */
 117     incolors = (((1 << inst->depth) > 256) ? 256 : (1 << inst->depth));
 118     for (i = 0; i < incolors; i++)
 119         icolors[i].pixel = i;
 120     XQueryColors(inst->display, inst->colormap, icolors, incolors);
 121
 122     /* try match unallocated ones */
 123     for (i = 0; i < _ncolors; i++) {
 124         if (!inst->pseudo_colors[i].flags) { /* if it wasn't allocated... */
 125             unsigned long closest = 0xffffffff, close = 0;
 126             for (ii = 0; ii < incolors; ii++) {
 127                 /* find deviations */
 128                 r = (inst->pseudo_colors[i].red - icolors[ii].red) & 0xff;
 129                 g = (inst->pseudo_colors[i].green - icolors[ii].green) & 0xff;
 130                 b = (inst->pseudo_colors[i].blue - icolors[ii].blue) & 0xff;
 131                 /* find a weighted absolute deviation */
 132                 dev = (r * r) + (g * g) + (b * b);
 133
 134                 if (dev < closest) {
 135                     closest = dev;
 136                     close = ii;
 137                 }
 138             }
 139
 140             inst->pseudo_colors[i].red = icolors[close].red;
 141             inst->pseudo_colors[i].green = icolors[close].green;
 142             inst->pseudo_colors[i].blue = icolors[close].blue;
 143             inst->pseudo_colors[i].pixel = icolors[close].pixel;
 144
 145             /* try alloc this closest color, it had better succeed! */
 146             if (XAllocColor(inst->display, inst->colormap,
 147                             &inst->pseudo_colors[i]))
 148                 /* mark as alloced */
 149                 inst->pseudo_colors[i].flags = DoRed|DoGreen|DoBlue;
 150             else
 151                 /* wtf has gone wrong, its already alloced for chissake! */
 152                 g_assert_not_reached();
 153         }
 154     }
 155 }
 156
 157 void RrInstanceFree (RrInstance *inst)
 158 {
 159     if (inst) {
 160         if (inst == definst) definst = NULL;
 161         g_free(inst->pseudo_colors);
 162         g_hash_table_destroy(inst->color_hash);
 163     }
 164 }
 165
 166 Display* RrDisplay (const RrInstance *inst)
 167 {
 168     return (inst ? inst : definst)->display;
 169 }
 170
 171 gint RrScreen (const RrInstance *inst)
 172 {
 173     return (inst ? inst : definst)->screen;
 174 }
 175
 176 Window RrRootWindow (const RrInstance *inst)
 177 {
 178     return RootWindow (RrDisplay (inst), RrScreen (inst));
 179 }
 180
 181 Visual *RrVisual (const RrInstance *inst)
 182 {
 183     return (inst ? inst : definst)->visual;
 184 }
 185
 186 gint RrDepth (const RrInstance *inst)
 187 {
 188     return (inst ? inst : definst)->depth;
 189 }
 190
 191 Colormap RrColormap (const RrInstance *inst)
 192 {
 193     return (inst ? inst : definst)->colormap;
 194 }
 195
 196 gint RrRedOffset (const RrInstance *inst)
 197 {
 198     return (inst ? inst : definst)->red_offset;
 199 }
 200
 201 gint RrGreenOffset (const RrInstance *inst)
 202 {
 203     return (inst ? inst : definst)->green_offset;
 204 }
 205
 206 gint RrBlueOffset (const RrInstance *inst)
 207 {
 208     return (inst ? inst : definst)->blue_offset;
 209 }
 210
 211 gint RrRedShift (const RrInstance *inst)
 212 {
 213     return (inst ? inst : definst)->red_shift;
 214 }
 215
 216 gint RrGreenShift (const RrInstance *inst)
 217 {
 218     return (inst ? inst : definst)->green_shift;
 219 }
 220
 221 gint RrBlueShift (const RrInstance *inst)
 222 {
 223     return (inst ? inst : definst)->blue_shift;
 224 }
 225
 226 gint RrRedMask (const RrInstance *inst)
 227 {
 228     return (inst ? inst : definst)->red_mask;
 229 }
 230
 231 gint RrGreenMask (const RrInstance *inst)
 232 {
 233     return (inst ? inst : definst)->green_mask;
 234 }
 235
 236 gint RrBlueMask (const RrInstance *inst)
 237 {
 238     return (inst ? inst : definst)->blue_mask;
 239 }
 240
 241 guint RrPseudoBPC (const RrInstance *inst)
 242 {
 243     return (inst ? inst : definst)->pseudo_bpc;
 244 }
 245
 246 XColor *RrPseudoColors (const RrInstance *inst)
 247 {
 248     return (inst ? inst : definst)->pseudo_colors;
 249 }
 250
 251 GHashTable* RrColorHash (const RrInstance *inst)
 252 {
 253     return (inst ? inst : definst)->color_hash;
 254 }