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Dogcows Code - chaz/openbox/blob - otk/rendercolor.cc
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
)
35 RenderColor::RenderColor(int screen
, RGB rgb
)
44 void RenderColor::create() const
46 unsigned long color
= _blue
| _green
<< 8 | _red
<< 16;
48 // try get a gc from the cache
49 CacheItem
*item
= _cache
[_screen
][color
];
58 // allocate a color and GC from the server
59 const ScreenInfo
*info
= display
->screenInfo(_screen
);
61 XColor xcol
; // convert from 0-0xff to 0-0xffff
62 xcol
.red
= (_red
<< 8) | _red
;
63 xcol
.green
= (_green
<< 8) | _green
;
64 xcol
.blue
= (_blue
<< 8) | _blue
;
67 if (! XAllocColor(**display
, info
->colormap(), &xcol
)) {
68 fprintf(stderr
, "RenderColor: color alloc error: rgb:%x/%x/%x\n",
74 gcv
.foreground
= _pixel
;
75 gcv
.cap_style
= CapProjecting
;
76 _gc
= XCreateGC(**display
, info
->rootWindow(),
77 GCForeground
| GCCapStyle
, &gcv
);
80 // insert into the cache
81 item
= new CacheItem(_gc
, _pixel
);
82 _cache
[_screen
][color
] = item
;
89 unsigned long RenderColor::pixel() const
91 if (!_allocated
) create();
95 GC
RenderColor::gc() const
97 if (!_allocated
) create();
101 RenderColor::~RenderColor()
103 unsigned long color
= _blue
| _green
<< 8 | _red
<< 16;
106 CacheItem
*item
= _cache
[_screen
][color
];
107 assert(item
); // better be...
109 if (--item
->count
<= 0) {
110 // remove from the cache
111 XFreeGC(**display
, _gc
);
112 _cache
[_screen
][color
] = 0;
115 const ScreenInfo
*info
= display
->screenInfo(_screen
);
116 XFreeColors(**display
, info
->colormap(), &_pixel
, 1, 0);
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