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   _bpc = 2; // XXX THIS SHOULD BE A USER OPTION
  30   assert(_bpc >= 1);
  31   _ncolors = 1 << (_bpc * 3);
  32
  33   if (_ncolors > 1 << depth) {
  34     fprintf(stderr,
  35             _("PseudoRenderControl: Invalid colormap size. Resizing.\n"));
  36     _bpc = 1 << (depth/3) >> 3;
  37     _ncolors = 1 << (_bpc * 3);
  38   }
  39
  40   _cpc = 1 << _bpc;
  41
  42   if (!(_colors = new XColor[_ncolors])) {
  43     fprintf(stderr,
  44             _("PseudoRenderControl: error allocating colormap\n"));
  45     ::exit(1);
  46   }
  47
  48   // build a color cube
  49   for (int n = _ncolors - 1,
  50          r = (1 << (_bpc + 1)) -1, i = 0; i < _cpc; r >>= 1, ++i)
  51     for (int g = (1 << (_bpc + 1)) -1, j = 0; j < _cpc; g >>= 1, ++j)
  52       for (int b = (1 << (_bpc + 1)) -1, k = 0; k < _cpc; b >>= 1, ++k, --n) {
  53         _colors[n].red = r | r << 8;
  54         _colors[n].green = g | g << 8;
  55         _colors[n].blue = b | b << 8;
  56         _colors[n].flags = DoRed|DoGreen|DoBlue; // used to track allocation
  57       }
  58
  59   // allocate the colors
  60   for (int i = 0; i < _ncolors; i++)
  61     if (!XAllocColor(**display, info->colormap(), &_colors[i]))
  62       _colors[i].flags = 0; // mark it as unallocated
  63
  64   // try allocate any colors that failed allocation above
  65
  66   // get the allocated values from the X server (only the first 256 XXX why!?)
  67   XColor icolors[256];
  68   int incolors = (((1 << depth) > 256) ? 256 : (1 << depth));
  69   for (int i = 0; i < incolors; i++)
  70     icolors[i].pixel = i;
  71   XQueryColors(**display, info->colormap(), icolors, incolors);
  72
  73   // try match unallocated ones
  74   for (int i = 0; i < _ncolors; i++) {
  75     if (!_colors[i].flags) { // if it wasn't allocated...
  76       unsigned long closest = 0xffffffff, close = 0;
  77       for (int ii = 0; ii < incolors; ii++) {
  78         // find deviations
  79         int r = (_colors[i].red - icolors[ii].red) & 0xff;
  80         int g = (_colors[i].green - icolors[ii].green) & 0xff;
  81         int b = (_colors[i].blue - icolors[ii].blue) & 0xff;
  82         // find a weighted absolute deviation
  83         unsigned long dev = (r * r) + (g * g) + (b * b);
  84
  85         if (dev < closest) {
  86           closest = dev;
  87           close = ii;
  88         }
  89       }
  90
  91       _colors[i].red = icolors[close].red;
  92       _colors[i].green = icolors[close].green;
  93       _colors[i].blue = icolors[close].blue;
  94
  95       // try alloc this closest color, it had better succeed!
  96       if (XAllocColor(**display, info->colormap(), &_colors[i]))
  97         _colors[i].flags = DoRed|DoGreen|DoBlue; // mark as alloced
  98       else
  99         assert(false); // wtf has gone wrong, its already alloced for chissake!
 100     }
 101   }
 102 }
 103
 104 PseudoRenderControl::~PseudoRenderControl()
 105 {
 106   printf("Destroying PseudoColor RenderControl\n");
 107
 108   delete _colors;
 109 }
 110
 111 void PseudoRenderControl::reduceDepth(Surface &sf, XImage *im) const
 112 {
 113 }
 114
 115 }