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