1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
2 // GCCache.hh for Blackbox - an X11 Window manager
3 // Copyright (c) 2001 - 2002 Sean 'Shaleh' Perry <shaleh at debian.org>
4 // Copyright (c) 1997 - 2000, 2002 Bradley T Hughes <bhughes at trolltech.com>
6 // Permission is hereby granted, free of charge, to any person obtaining a
7 // copy of this software and associated documentation files (the "Software"),
8 // to deal in the Software without restriction, including without limitation
9 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 // and/or sell copies of the Software, and to permit persons to whom the
11 // Software is furnished to do so, subject to the following conditions:
13 // The above copyright notice and this permission notice shall be included in
14 // all copies or substantial portions of the Software.
16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 // DEALINGS IN THE SOFTWARE.
31 #include "BaseDisplay.hh"
36 class BGCCacheContext {
38 void set(const BColor &_color, const XFontStruct * const _font,
39 const int _function, const int _subwindow);
40 void set(const XFontStruct * const _font);
42 ~BGCCacheContext(void);
45 BGCCacheContext(const BaseDisplay * const _display)
46 : display(_display), gc(0), pixel(0ul), fontid(0ul),
47 function(0), subwindow(0), used(false), screen(~(0u)) {}
49 const BaseDisplay *display;
58 BGCCacheContext(const BGCCacheContext &_nocopy);
59 BGCCacheContext &operator=(const BGCCacheContext &_nocopy);
61 friend class BGCCache;
62 friend class BGCCacheItem;
67 inline const GC &gc(void) const { return ctx->gc; }
70 BGCCacheItem(void) : ctx(0), count(0), hits(0), fault(false) { }
77 BGCCacheItem(const BGCCacheItem &_nocopy);
78 BGCCacheItem &operator=(const BGCCacheItem &_nocopy);
80 friend class BGCCache;
85 explicit BGCCache(const BaseDisplay * const _display);
88 // cleans up the cache
91 BGCCacheItem *find(const BColor &_color, const XFontStruct * const _font = 0,
92 int _function = GXcopy, int _subwindow = ClipByChildren);
93 void release(BGCCacheItem *_item);
96 BGCCacheContext *nextContext(unsigned int _screen);
97 void release(BGCCacheContext *ctx);
99 // this is closely modelled after the Qt GC cache, but with some of the
100 // complexity stripped out
101 const BaseDisplay *display;
103 const unsigned int context_count;
104 const unsigned int cache_size;
105 const unsigned int cache_buckets;
106 const unsigned int cache_total_size;
107 BGCCacheContext **contexts;
108 BGCCacheItem **cache;
113 inline BPen(const BColor &_color, const XFontStruct * const _font = 0,
114 int _function = GXcopy, int _subwindow = ClipByChildren)
115 : color(_color), font(_font), function(_function), subwindow(_subwindow),
116 cache(_color.display()->gcCache()), item(0) { }
117 inline ~BPen(void) { if (item) cache->release(item); }
119 inline const GC &gc(void) const {
120 if (! item) item = cache->find(color, font, function, subwindow);
126 const XFontStruct *font;
130 mutable BGCCache *cache;
131 mutable BGCCacheItem *item;