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

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #ifdef    HAVE_CONFIG_H
   4 #  include "../config.h"
   5 #endif // HAVE_CONFIG_H
   6
   7 #include "rendercolor.hh"
   8 #include "display.hh"
   9 #include "screeninfo.hh"
  10
  11 namespace otk {
  12
  13 std::map<unsigned long, RenderColor::CacheItem*> *RenderColor::_cache = 0;
  14
  15 void RenderColor::initialize()
  16 {
  17   _cache = new std::map<unsigned long, CacheItem*>[ScreenCount(**display)];
  18 }
  19
  20 void RenderColor::destroy()
  21 {
  22   delete [] _cache;
  23 }
  24
  25 RenderColor::RenderColor(int screen, unsigned char red,
  26                          unsigned char green, unsigned char blue)
  27   : _screen(screen),
  28     _red(red),
  29     _green(green),
  30     _blue(blue),
  31     _gc(0)
  32 {
  33   create();
  34 }
  35
  36 RenderColor::RenderColor(int screen, RGB rgb)
  37   : _screen(screen),
  38     _red(rgb.r),
  39     _green(rgb.g),
  40     _blue(rgb.b),
  41     _gc(0)
  42 {
  43   create();
  44 }
  45
  46 void RenderColor::create()
  47 {
  48   unsigned long color = _blue | _green << 8 | _red << 16;
  49
  50   printf("CREATE COLOR: %lx\n", color);
  51
  52   // try get a gc from the cache
  53   CacheItem *item = _cache[_screen][color];
  54
  55   if (item) {
  56     _gc = item->gc;
  57     _pixel = item->pixel;
  58     ++item->count;
  59   } else {
  60     XGCValues gcv;
  61
  62     // allocate a color and GC from the server
  63     const ScreenInfo *info = display->screenInfo(_screen);
  64
  65     XColor xcol;    // convert from 0-0xff to 0-0xffff
  66     xcol.red = _red; xcol.red |= xcol.red << 8;
  67     xcol.green = _green; xcol.green |= xcol.green << 8;
  68     xcol.blue = _blue; xcol.blue |= xcol.blue << 8;
  69     xcol.pixel = 0;
  70
  71     if (! XAllocColor(**display, info->colormap(), &xcol)) {
  72       fprintf(stderr, "RenderColor: color alloc error: rgb:%x/%x/%x\n",
  73               _red, _green, _blue);
  74       xcol.pixel = 0;
  75     }
  76
  77     _pixel = xcol.pixel;
  78     gcv.foreground = _pixel;
  79     gcv.cap_style = CapProjecting;
  80     _gc = XCreateGC(**display, info->rootWindow(),
  81                     GCForeground | GCCapStyle, &gcv);
  82     assert(_gc);
  83
  84     // insert into the cache
  85     item = new CacheItem(_gc, _pixel);
  86     _cache[_screen][color] = item;
  87     ++item->count;
  88   }
  89 }
  90
  91 RenderColor::~RenderColor()
  92 {
  93   unsigned long color = _blue | _green << 8 | _red << 16;
  94
  95   CacheItem *item = _cache[_screen][color];
  96   assert(item); // it better be in the cache ...
  97
  98   printf("DESTROY COLOR: %lx %d\n", color, item->count);
  99
 100   if (--item->count <= 0) {
 101     // remove from the cache
 102     XFreeGC(**display, _gc);
 103     _cache[_screen][color] = 0;
 104     delete item;
 105   }
 106 }
 107
 108 }