1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
5 #include "rendercolor.hh"
7 #include "screeninfo.hh"
13 std::map<unsigned long, RenderColor::CacheItem*> *RenderColor::_cache = 0;
15 void RenderColor::initialize()
17 _cache = new std::map<unsigned long, CacheItem*>[ScreenCount(**display)];
20 void RenderColor::destroy()
25 RenderColor::RenderColor(int screen, unsigned char red,
26 unsigned char green, unsigned char blue)
36 RenderColor::RenderColor(int screen, RGB rgb)
46 void RenderColor::create()
48 unsigned long color = _blue | _green << 8 | _red << 16;
50 // try get a gc from the cache
51 CacheItem *item = _cache[_screen][color];
60 // allocate a color and GC from the server
61 const ScreenInfo *info = display->screenInfo(_screen);
63 XColor xcol; // convert from 0-0xff to 0-0xffff
64 xcol.red = _red; xcol.red |= xcol.red << 8;
65 xcol.green = _green; xcol.green |= xcol.green << 8;
66 xcol.blue = _blue; xcol.blue |= xcol.blue << 8;
69 if (! XAllocColor(**display, info->colormap(), &xcol)) {
70 fprintf(stderr, "RenderColor: color alloc error: rgb:%x/%x/%x\n",
76 gcv.foreground = _pixel;
77 gcv.cap_style = CapProjecting;
78 _gc = XCreateGC(**display, info->rootWindow(),
79 GCForeground | GCCapStyle, &gcv);
82 // insert into the cache
83 item = new CacheItem(_gc, _pixel);
84 _cache[_screen][color] = item;
89 RenderColor::~RenderColor()
91 unsigned long color = _blue | _green << 8 | _red << 16;
93 CacheItem *item = _cache[_screen][color];
94 assert(item); // it better be in the cache ...
96 if (--item->count <= 0) {
97 // remove from the cache
98 XFreeGC(**display, _gc);
99 _cache[_screen][color] = 0;