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Dogcows Code - chaz/openbox/blob - src/GCCache.cc
1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
2 // GCCache.cc 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.
25 # include "../config.h"
26 #endif // HAVE_CONFIG_H
33 #include "BaseDisplay.hh"
38 BGCCacheContext::~BGCCacheContext(void) {
40 XFreeGC(display
->getXDisplay(), gc
);
44 void BGCCacheContext::set(const BColor
&_color
,
45 const XFontStruct
* const _font
,
46 const int _function
, const int _subwindow
) {
48 pixel
= gcv
.foreground
= _color
.pixel();
49 function
= gcv
.function
= _function
;
50 subwindow
= gcv
.subwindow_mode
= _subwindow
;
51 unsigned long mask
= GCForeground
| GCFunction
| GCSubwindowMode
;
54 fontid
= gcv
.font
= _font
->fid
;
60 XChangeGC(display
->getXDisplay(), gc
, mask
, &gcv
);
64 void BGCCacheContext::set(const XFontStruct
* const _font
) {
71 fontid
= gcv
.font
= _font
->fid
;
72 XChangeGC(display
->getXDisplay(), gc
, GCFont
, &gcv
);
76 BGCCache::BGCCache(const BaseDisplay
* const _display
)
77 : display(_display
), context_count(128u),
78 cache_size(16u), cache_buckets(8u),
79 cache_total_size(cache_size
* cache_buckets
) {
81 contexts
= new BGCCacheContext
*[context_count
];
83 for (i
= 0; i
< context_count
; i
++) {
84 contexts
[i
] = new BGCCacheContext(display
);
87 cache
= new BGCCacheItem
*[cache_total_size
];
88 for (i
= 0; i
< cache_total_size
; ++i
) {
89 cache
[i
] = new BGCCacheItem
;
94 BGCCache::~BGCCache(void) {
95 std::for_each(contexts
, contexts
+ context_count
, PointerAssassin());
96 std::for_each(cache
, cache
+ cache_total_size
, PointerAssassin());
102 BGCCacheContext
*BGCCache::nextContext(unsigned int scr
) {
103 Window hd
= display
->getScreenInfo(scr
)->getRootWindow();
107 for (unsigned int i
= 0; i
< context_count
; ++i
) {
111 c
->gc
= XCreateGC(display
->getXDisplay(), hd
, 0, 0);
115 if (! c
->used
&& c
->screen
== scr
) {
121 fprintf(stderr
, "BGCCache: context fault!\n");
123 return (BGCCacheContext
*) 0; // not reached
127 void BGCCache::release(BGCCacheContext
*ctx
) {
132 BGCCacheItem
*BGCCache::find(const BColor
&_color
,
133 const XFontStruct
* const _font
,
134 int _function
, int _subwindow
) {
135 const unsigned long pixel
= _color
.pixel();
136 const unsigned int screen
= _color
.screen();
137 const int key
= _color
.red() ^ _color
.green() ^ _color
.blue();
138 int k
= (key
% cache_size
) * cache_buckets
;
139 int i
= 0; // loop variable
140 BGCCacheItem
*c
= cache
[ k
], *prev
= 0;
142 // this will either loop 8 times then return/abort or it will stop matching
144 (c
->ctx
->pixel
!= pixel
|| c
->ctx
->function
!= _function
||
145 c
->ctx
->subwindow
!= _subwindow
|| c
->ctx
->screen
!= screen
)) {
152 if (c
->count
== 0 && c
->ctx
->screen
== screen
) {
153 // use this cache item
154 c
->ctx
->set(_color
, _font
, _function
, _subwindow
);
161 fprintf(stderr
, "BGCCache: cache fault\n");
165 const unsigned long fontid
= _font
? _font
->fid
: 0;
167 // reuse existing context
168 if (fontid
&& fontid
!= c
->ctx
->fontid
)
172 if (prev
&& c
->hits
> prev
->hits
) {
177 c
->ctx
= nextContext(screen
);
178 c
->ctx
->set(_color
, _font
, _function
, _subwindow
);
188 void BGCCache::release(BGCCacheItem
*_item
) {
193 void BGCCache::purge(void) {
194 for (unsigned int i
= 0; i
< cache_total_size
; ++i
) {
195 BGCCacheItem
*d
= cache
[ i
];
197 if (d
->ctx
&& d
->count
== 0) {
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