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     g_message("Initializing PseudoColor RenderControl\n");
  76
  77     /* determine the number of colors and the bits-per-color */
  78     inst->pseudo_bpc = 2; /* XXX THIS SHOULD BE A USER OPTION */
  79     g_assert(inst->pseudo_bpc >= 1);
  80     _ncolors = RrPseudoNcolors(inst);
  81
  82     if (_ncolors > 1 << inst->depth) {
  83         g_warning("PseudoRenderControl: Invalid colormap size. Resizing.\n");
  84         inst->pseudo_bpc = 1 << (inst->depth/3) >> 3;
  85         _ncolors = 1 << (inst->pseudo_bpc * 3);
  86     }
  87
  88     /* build a color cube */
  89     inst->pseudo_colors = g_new(XColor, _ncolors);
  90     cpc = 1 << inst->pseudo_bpc; /* colors per channel */
  91
  92     for (n = 0, r = 0; r < cpc; r++)
  93         for (g = 0; g < cpc; g++)
  94             for (b = 0; b < cpc; b++, n++) {
  95                 tr = (int)(((float)(r)/(float)(cpc-1)) * 0xFF);
  96                 tg = (int)(((float)(g)/(float)(cpc-1)) * 0xFF);
  97                 tb = (int)(((float)(b)/(float)(cpc-1)) * 0xFF);
  98                 inst->pseudo_colors[n].red = tr | tr << 8;
  99                 inst->pseudo_colors[n].green = tg | tg << 8;
 100                 inst->pseudo_colors[n].blue = tb | tb << 8;
 101                 /* used to track allocation */
 102                 inst->pseudo_colors[n].flags = DoRed|DoGreen|DoBlue;
 103             }
 104
 105     /* allocate the colors */
 106     for (i = 0; i < _ncolors; i++)
 107         if (!XAllocColor(inst->display, inst->colormap,
 108                          &inst->pseudo_colors[i]))
 109             inst->pseudo_colors[i].flags = 0; /* mark it as unallocated */
 110
 111     /* try allocate any colors that failed allocation above */
 112
 113     /* get the allocated values from the X server
 114        (only the first 256 XXX why!?)
 115      */
 116     incolors = (((1 << inst->depth) > 256) ? 256 : (1 << inst->depth));
 117     for (i = 0; i < incolors; i++)
 118         icolors[i].pixel = i;
 119     XQueryColors(inst->display, inst->colormap, icolors, incolors);
 120
 121     /* try match unallocated ones */
 122     for (i = 0; i < _ncolors; i++) {
 123         if (!inst->pseudo_colors[i].flags) { /* if it wasn't allocated... */
 124             unsigned long closest = 0xffffffff, close = 0;
 125             for (ii = 0; ii < incolors; ii++) {
 126                 /* find deviations */
 127                 r = (inst->pseudo_colors[i].red - icolors[ii].red) & 0xff;
 128                 g = (inst->pseudo_colors[i].green - icolors[ii].green) & 0xff;
 129                 b = (inst->pseudo_colors[i].blue - icolors[ii].blue) & 0xff;
 130                 /* find a weighted absolute deviation */
 131                 dev = (r * r) + (g * g) + (b * b);
 132
 133                 if (dev < closest) {
 134                     closest = dev;
 135                     close = ii;
 136                 }
 137             }
 138
 139             inst->pseudo_colors[i].red = icolors[close].red;
 140             inst->pseudo_colors[i].green = icolors[close].green;
 141             inst->pseudo_colors[i].blue = icolors[close].blue;
 142             inst->pseudo_colors[i].pixel = icolors[close].pixel;
 143
 144             /* try alloc this closest color, it had better succeed! */
 145             if (XAllocColor(inst->display, inst->colormap,
 146                             &inst->pseudo_colors[i]))
 147                 /* mark as alloced */
 148                 inst->pseudo_colors[i].flags = DoRed|DoGreen|DoBlue;
 149             else
 150                 /* wtf has gone wrong, its already alloced for chissake! */
 151                 g_assert_not_reached();
 152         }
 153     }
 154 }
 155
 156 void RrInstanceFree (RrInstance *inst)
 157 {
 158     if (inst) {
 159         if (inst == definst) definst = NULL;
 160         g_free(inst->pseudo_colors);
 161     }
 162 }
 163
 164 Display* RrDisplay (const RrInstance *inst)
 165 {
 166     return (inst ? inst : definst)->display;
 167 }
 168
 169 gint RrScreen (const RrInstance *inst)
 170 {
 171     return (inst ? inst : definst)->screen;
 172 }
 173
 174 Window RrRootWindow (const RrInstance *inst)
 175 {
 176     return RootWindow (RrDisplay (inst), RrScreen (inst));
 177 }
 178
 179 Visual *RrVisual (const RrInstance *inst)
 180 {
 181     return (inst ? inst : definst)->visual;
 182 }
 183
 184 gint RrDepth (const RrInstance *inst)
 185 {
 186     return (inst ? inst : definst)->depth;
 187 }
 188
 189 Colormap RrColormap (const RrInstance *inst)
 190 {
 191     return (inst ? inst : definst)->colormap;
 192 }
 193
 194 gint RrRedOffset (const RrInstance *inst)
 195 {
 196     return (inst ? inst : definst)->red_offset;
 197 }
 198
 199 gint RrGreenOffset (const RrInstance *inst)
 200 {
 201     return (inst ? inst : definst)->green_offset;
 202 }
 203
 204 gint RrBlueOffset (const RrInstance *inst)
 205 {
 206     return (inst ? inst : definst)->blue_offset;
 207 }
 208
 209 gint RrRedShift (const RrInstance *inst)
 210 {
 211     return (inst ? inst : definst)->red_shift;
 212 }
 213
 214 gint RrGreenShift (const RrInstance *inst)
 215 {
 216     return (inst ? inst : definst)->green_shift;
 217 }
 218
 219 gint RrBlueShift (const RrInstance *inst)
 220 {
 221     return (inst ? inst : definst)->blue_shift;
 222 }
 223
 224 gint RrRedMask (const RrInstance *inst)
 225 {
 226     return (inst ? inst : definst)->red_mask;
 227 }
 228
 229 gint RrGreenMask (const RrInstance *inst)
 230 {
 231     return (inst ? inst : definst)->green_mask;
 232 }
 233
 234 gint RrBlueMask (const RrInstance *inst)
 235 {
 236     return (inst ? inst : definst)->blue_mask;
 237 }
 238
 239 guint RrPseudoBPC (const RrInstance *inst)
 240 {
 241     return (inst ? inst : definst)->pseudo_bpc;
 242 }
 243
 244 XColor *RrPseudoColors (const RrInstance *inst)
 245 {
 246     return (inst ? inst : definst)->pseudo_colors;
 247 }