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

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #include "config.h"
   4
   5 #include "rendercolor.hh"
   6 #include "display.hh"
   7 #include "screeninfo.hh"
   8 #include "rendercontrol.hh"
   9
  10 #include <cstdio>
  11
  12 namespace otk {
  13
  14 std::map<unsigned long, RenderColor::CacheItem*> *RenderColor::_cache = 0;
  15
  16 void RenderColor::initialize()
  17 {
  18   _cache = new std::map<unsigned long, CacheItem*>[ScreenCount(**display)];
  19 }
  20
  21 void RenderColor::destroy()
  22 {
  23   delete [] _cache;
  24 }
  25
  26 RenderColor::RenderColor(int screen, unsigned char red,
  27                          unsigned char green, unsigned char blue)
  28   : _screen(screen),
  29     _red(red),
  30     _green(green),
  31     _blue(blue),
  32     _allocated(false),
  33     _created(false)
  34 {
  35 }
  36
  37 RenderColor::RenderColor(int screen, RGB rgb)
  38   : _screen(screen),
  39     _red(rgb.r),
  40     _green(rgb.g),
  41     _blue(rgb.b),
  42     _allocated(false),
  43     _created(false)
  44 {
  45 }
  46
  47 void RenderColor::create() const
  48 {
  49   unsigned long color = _blue | _green << 8 | _red << 16;
  50
  51   // try get a gc from the cache
  52   CacheItem *item = _cache[_screen][color];
  53
  54   if (item) {
  55     _gc = item->gc;
  56     _pixel = item->pixel;
  57     ++item->count;
  58   } else {
  59     XGCValues gcv;
  60
  61     // allocate a color and GC from the server
  62     const ScreenInfo *info = display->screenInfo(_screen);
  63
  64     XColor xcol;    // convert from 0-0xff to 0-0xffff
  65     xcol.red = (_red << 8) | _red;
  66     xcol.green = (_green << 8) | _green;
  67     xcol.blue = (_blue << 8) | _blue;
  68
  69     display->renderControl(_screen)->allocateColor(&xcol);
  70     _allocated = true;
  71
  72     _pixel = xcol.pixel;
  73     gcv.foreground = _pixel;
  74     gcv.cap_style = CapProjecting;
  75     _gc = XCreateGC(**display, info->rootWindow(),
  76                     GCForeground | GCCapStyle, &gcv);
  77     assert(_gc);
  78
  79     // insert into the cache
  80     item = new CacheItem(_gc, _pixel);
  81     _cache[_screen][color] = item;
  82     ++item->count;
  83   }
  84
  85   _created = true;
  86 }
  87
  88 unsigned long RenderColor::pixel() const
  89 {
  90   if (!_created) create();
  91   return _pixel;
  92 }
  93
  94 GC RenderColor::gc() const
  95 {
  96   if (!_created) create();
  97   return _gc;
  98 }
  99
 100 RenderColor::~RenderColor()
 101 {
 102   unsigned long color = _blue | _green << 8 | _red << 16;
 103
 104   if (_created) {
 105     CacheItem *item = _cache[_screen][color];
 106     assert(item); // better be...
 107
 108     if (--item->count <= 0) {
 109       // remove from the cache
 110       XFreeGC(**display, _gc);
 111       _cache[_screen][color] = 0;
 112       delete item;
 113
 114       if (_allocated) {
 115         const ScreenInfo *info = display->screenInfo(_screen);
 116         XFreeColors(**display, info->colormap(), &_pixel, 1, 0);
 117       }
 118     }
 119   }
 120 }
 121
 122 }