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   _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 int tr, tg, tb;
  44   int cpc = 1 << _bpc; // colors per channel
  45   for (int n = 0,
  46          r = 0; r < cpc; r++)
  47     for (int g = 0; g < cpc; g++)
  48       for (int b = 0; b < cpc; b++, n++) {
  49         tr = (int)(((float)(r)/(float)(cpc-1)) * 0xFF);
  50         tg = (int)(((float)(g)/(float)(cpc-1)) * 0xFF);
  51         tb = (int)(((float)(b)/(float)(cpc-1)) * 0xFF);
  52         _colors[n].red = tr | tr << 8;
  53         _colors[n].green = tg | tg << 8;
  54         _colors[n].blue = tb | tb << 8;
  55         _colors[n].flags = DoRed|DoGreen|DoBlue; // used to track allocation
  56       }
  57
  58   // allocate the colors
  59   for (int i = 0; i < _ncolors; i++)
  60     if (!XAllocColor(**display, info->colormap(), &_colors[i]))
  61       _colors[i].flags = 0; // mark it as unallocated
  62
  63   // try allocate any colors that failed allocation above
  64
  65   // get the allocated values from the X server (only the first 256 XXX why!?)
  66   XColor icolors[256];
  67   int incolors = (((1 << depth) > 256) ? 256 : (1 << depth));
  68   for (int i = 0; i < incolors; i++)
  69     icolors[i].pixel = i;
  70   XQueryColors(**display, info->colormap(), icolors, incolors);
  71
  72   // try match unallocated ones
  73   for (int i = 0; i < _ncolors; i++) {
  74     if (!_colors[i].flags) { // if it wasn't allocated...
  75       unsigned long closest = 0xffffffff, close = 0;
  76       for (int ii = 0; ii < incolors; ii++) {
  77         // find deviations
  78         int r = (_colors[i].red - icolors[ii].red) & 0xff;
  79         int g = (_colors[i].green - icolors[ii].green) & 0xff;
  80         int b = (_colors[i].blue - icolors[ii].blue) & 0xff;
  81         // find a weighted absolute deviation
  82         unsigned long dev = (r * r) + (g * g) + (b * b);
  83
  84         if (dev < closest) {
  85           closest = dev;
  86           close = ii;
  87         }
  88       }
  89
  90       _colors[i].red = icolors[close].red;
  91       _colors[i].green = icolors[close].green;
  92       _colors[i].blue = icolors[close].blue;
  93       _colors[i].pixel = icolors[close].pixel;
  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   unsigned long *pixels = new unsigned long [_ncolors], *p = pixels;
 109   for (int i = 0; i < _ncolors; ++i, ++p)
 110     *p = _colors[i].pixel;
 111   XFreeColors(**display, display->screenInfo(_screen)->colormap(), pixels,
 112               _ncolors, 0);
 113   delete [] _colors;
 114 }
 115
 116 inline const XColor *PseudoRenderControl::pickColor(int r, int g, int b) const
 117 {
 118   r = (r & 0xff) >> (8-_bpc);
 119   g = (g & 0xff) >> (8-_bpc);
 120   b = (b & 0xff) >> (8-_bpc);
 121   return &_colors[(r << (2*_bpc)) + (g << (1*_bpc)) + b];
 122 }
 123
 124 void PseudoRenderControl::reduceDepth(Surface &sf, XImage *im) const
 125 {
 126   pixel32 *data = sf.pixelData();
 127   char *p = (char *)data;
 128   int x, y;
 129     for (y = 0; y < im->height; y++) {
 130       for (x = 0; x < im->width; x++) {
 131         p[x] = pickColor(data[x] >> default_red_shift,
 132                          data[x] >> default_green_shift,
 133                          data[x] >> default_blue_shift)->pixel;
 134       }
 135       data += im->width;
 136       p += im->bytes_per_line;
 137     }
 138
 139 }
 140
 141 void PseudoRenderControl::allocateColor(XColor *color) const
 142 {
 143   const XColor *c = pickColor(color->red, color->blue, color->green);
 144
 145   color->red = c->red;
 146   color->green = c->green;
 147   color->blue = c->blue;
 148   color->pixel = c->pixel;
 149
 150   if (XAllocColor(**display, display->screenInfo(_screen)->colormap(), color))
 151     color->flags = DoRed|DoGreen|DoBlue; // mark as alloced
 152   else
 153     assert(false); // wtf has gone wrong, its already alloced for chissake!
 154
 155   return;
 156 }
 157
 158 }