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);
43 BGCCacheContext(const BaseDisplay * const _display)
44 : display(_display), gc(0), pixel(0ul), fontid(0ul),
45 function(0), subwindow(0), used(false), screen(~(0u)) {}
47 const BaseDisplay *display;
56 BGCCacheContext(const BGCCacheContext &_nocopy);
57 BGCCacheContext &operator=(const BGCCacheContext &_nocopy);
59 friend class BGCCache;
60 friend class BGCCacheItem;
65 inline const GC &gc(void) const { return ctx->gc; }
68 BGCCacheItem(void) : ctx(0), count(0), hits(0), fault(false) { }
75 BGCCacheItem(const BGCCacheItem &_nocopy);
76 BGCCacheItem &operator=(const BGCCacheItem &_nocopy);
78 friend class BGCCache;
83 explicit BGCCache(const BaseDisplay * const _display);
86 // cleans up the cache
89 BGCCacheItem *find(const BColor &_color, const XFontStruct * const _font = 0,
90 int _function = GXcopy, int _subwindow = ClipByChildren);
91 void release(BGCCacheItem *_item);
94 BGCCacheContext *nextContext(unsigned int _screen);
95 void release(BGCCacheContext *ctx);
97 // this is closely modelled after the Qt GC cache, but with some of the
98 // complexity stripped out
99 const BaseDisplay *display;
101 const unsigned int context_count;
102 const unsigned int cache_size;
103 const unsigned int cache_buckets;
104 const unsigned int cache_total_size;
105 BGCCacheContext **contexts;
106 BGCCacheItem **cache;
111 inline BPen(const BColor &_color, const XFontStruct * const _font = 0,
112 int _function = GXcopy, int _subwindow = ClipByChildren)
113 : color(_color), font(_font), function(_function), subwindow(_subwindow),
114 cache(_color.display()->gcCache()), item(0) { }
115 inline ~BPen(void) { if (item) cache->release(item); }
117 inline const GC &gc(void) const {
118 if (! item) item = cache->find(color, font, function, subwindow);
124 const XFontStruct *font;
128 mutable BGCCache *cache;
129 mutable BGCCacheItem *item;