Dogcows Code - chaz/openbox/blob - otk/pseudorendercontrol.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #include "config.h"
   4
   5 #include "pseudorendercontrol.hh"
   6 #include "display.hh"
   7 #include "screeninfo.hh"
   8 #include "surface.hh"
   9 #include "rendertexture.hh"
  10
  11 extern "C" {
  12 #ifdef    HAVE_STDLIB_H
  13 #  include <stdlib.h>
  14 #endif // HAVE_STDLIB_H
  15
  16 #include "../src/gettext.h"
  17 #define _(str) gettext(str)
  18 }
  19
  20 namespace otk {
  21
  22 PseudoRenderControl::PseudoRenderControl(int screen)
  23   : RenderControl(screen)
  24 {
  25   printf("Initializing PseudoColor RenderControl\n");
  26   const ScreenInfo *info = display->screenInfo(_screen);
  27   int depth = info->depth();
  28
  29   // determine the number of colors and the bits-per-color
  30   int bpc = 2; // XXX THIS SHOULD BE A USER OPTION
  31   assert(bpc >= 1);
  32   _ncolors = 1 << (bpc * 3);
  33
  34   if (_ncolors > 1 << depth) {
  35     fprintf(stderr,
  36             _("PseudoRenderControl: Invalid colormap size. Resizing.\n"));
  37     bpc = 1 << (depth/3) >> 3;
  38     _ncolors = 1 << (bpc * 3);
  39   }
  40
  41   // build a color cube
  42   _colors = new XColor[_ncolors];
  43
  44   int cpc = 1 << bpc; // colors per channel
  45   for (int n = _ncolors - 1,
  46          r = (1 << (bpc + 1)) -1, i = 0; i < cpc; r >>= 1, ++i)
  47     for (int g = (1 << (bpc + 1)) -1, j = 0; j < cpc; g >>= 1, ++j)
  48       for (int b = (1 << (bpc + 1)) -1, k = 0; k < cpc; b >>= 1, ++k, --n) {
  49         _colors[n].red = r | r << 8;
  50         _colors[n].green = g | g << 8;
  51         _colors[n].blue = b | b << 8;
  52         _colors[n].flags = DoRed|DoGreen|DoBlue; // used to track allocation
  53       }
  54
  55   // allocate the colors
  56   for (int i = 0; i < _ncolors; i++)
  57     if (!XAllocColor(**display, info->colormap(), &_colors[i]))
  58       _colors[i].flags = 0; // mark it as unallocated
  59
  60   // try allocate any colors that failed allocation above
  61
  62   // get the allocated values from the X server (only the first 256 XXX why!?)
  63   XColor icolors[256];
  64   int incolors = (((1 << depth) > 256) ? 256 : (1 << depth));
  65   for (int i = 0; i < incolors; i++)
  66     icolors[i].pixel = i;
  67   XQueryColors(**display, info->colormap(), icolors, incolors);
  68
  69   // try match unallocated ones
  70   for (int i = 0; i < _ncolors; i++) {
  71     if (!_colors[i].flags) { // if it wasn't allocated...
  72       unsigned long closest = 0xffffffff, close = 0;
  73       for (int ii = 0; ii < incolors; ii++) {
  74         // find deviations
  75         int r = (_colors[i].red - icolors[ii].red) & 0xff;
  76         int g = (_colors[i].green - icolors[ii].green) & 0xff;
  77         int b = (_colors[i].blue - icolors[ii].blue) & 0xff;
  78         // find a weighted absolute deviation
  79         unsigned long dev = (r * r) + (g * g) + (b * b);
  80
  81         if (dev < closest) {
  82           closest = dev;
  83           close = ii;
  84         }
  85       }
  86
  87       _colors[i].red = icolors[close].red;
  88       _colors[i].green = icolors[close].green;
  89       _colors[i].blue = icolors[close].blue;
  90
  91       // try alloc this closest color, it had better succeed!
  92       if (XAllocColor(**display, info->colormap(), &_colors[i]))
  93         _colors[i].flags = DoRed|DoGreen|DoBlue; // mark as alloced
  94       else
  95         assert(false); // wtf has gone wrong, its already alloced for chissake!
  96     }
  97   }
  98 }
  99
 100 PseudoRenderControl::~PseudoRenderControl()
 101 {
 102   printf("Destroying PseudoColor RenderControl\n");
 103
 104   unsigned long *pixels = new unsigned long [_ncolors], *p = pixels;
 105   for (int i = 0; i < _ncolors; ++i, ++p)
 106     *p = _colors[i].pixel;
 107   XFreeColors(**display, display->screenInfo(_screen)->colormap(), pixels,
 108               _ncolors, 0);
 109   delete [] _colors;
 110 }
 111
 112 void PseudoRenderControl::reduceDepth(Surface &sf, XImage *im) const
 113 {
 114 }
 115
 116 }