1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
4 # include "../config.h"
5 #endif // HAVE_CONFIG_H
7 #include "rendercolor.hh"
9 #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];
59 // allocate a color and GC from the server
60 const ScreenInfo *info = display->screenInfo(_screen);
62 XColor xcol; // convert from 0-0xff to 0-0xffff
63 xcol.red = _red; xcol.red |= xcol.red << 8;
64 xcol.green = _green; xcol.green |= xcol.green << 8;
65 xcol.blue = _blue; xcol.blue |= xcol.blue << 8;
68 if (! XAllocColor(**display, info->colormap(), &xcol)) {
69 fprintf(stderr, "RenderColor: color alloc error: rgb:%x/%x/%x\n",
74 gcv.foreground = xcol.pixel;
75 gcv.cap_style = CapProjecting;
76 _gc = XCreateGC(**display, info->rootWindow(),
77 GCForeground | GCCapStyle, &gcv);
80 // insert into the cache
81 _cache[_screen][color] = new CacheItem(_gc);
85 RenderColor::~RenderColor()
87 unsigned long color = _blue | _green << 8 | _red << 16;
89 CacheItem *item = _cache[_screen][color];
90 assert(item); // it better be in the cache ...
92 if (--item->count <= 0) {
93 // remove from the cache
94 XFreeGC(**display, _gc);
95 _cache[_screen][color] = 0;