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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 void BGCCacheContext::set(const BColor
&_color
,
39 const XFontStruct
* const _font
,
40 const int _function
, const int _subwindow
) {
42 pixel
= gcv
.foreground
= _color
.pixel();
43 function
= gcv
.function
= _function
;
44 subwindow
= gcv
.subwindow_mode
= _subwindow
;
45 unsigned long mask
= GCForeground
| GCFunction
| GCSubwindowMode
;
48 fontid
= gcv
.font
= _font
->fid
;
54 XChangeGC(display
->getXDisplay(), gc
, mask
, &gcv
);
58 void BGCCacheContext::set(const XFontStruct
* const _font
) {
65 fontid
= gcv
.font
= _font
->fid
;
66 XChangeGC(display
->getXDisplay(), gc
, GCFont
, &gcv
);
70 BGCCache::BGCCache(const BaseDisplay
* const _display
)
71 : display(_display
), context_count(128u),
72 cache_size(16u), cache_buckets(8u),
73 cache_total_size(cache_size
* cache_buckets
) {
75 contexts
= new BGCCacheContext
*[context_count
];
77 for (i
= 0; i
< context_count
; i
++) {
78 contexts
[i
] = new BGCCacheContext(display
);
81 cache
= new BGCCacheItem
*[cache_total_size
];
82 for (i
= 0; i
< cache_total_size
; ++i
) {
83 cache
[i
] = new BGCCacheItem
;
88 BGCCache::~BGCCache(void) {
89 std::for_each(contexts
, contexts
+ context_count
, PointerAssassin());
90 std::for_each(cache
, cache
+ cache_total_size
, PointerAssassin());
96 BGCCacheContext
*BGCCache::nextContext(unsigned int scr
) {
97 Window hd
= display
->getScreenInfo(scr
)->getRootWindow();
101 for (unsigned int i
= 0; i
< context_count
; ++i
) {
105 c
->gc
= XCreateGC(display
->getXDisplay(), hd
, 0, 0);
109 if (! c
->used
&& c
->screen
== scr
) {
115 fprintf(stderr
, "BGCCache: context fault!\n");
117 return (BGCCacheContext
*) 0; // not reached
121 void BGCCache::release(BGCCacheContext
*ctx
) {
126 BGCCacheItem
*BGCCache::find(const BColor
&_color
,
127 const XFontStruct
* const _font
,
128 int _function
, int _subwindow
) {
129 const unsigned long pixel
= _color
.pixel();
130 const unsigned int screen
= _color
.screen();
131 const int key
= _color
.red() ^ _color
.green() ^ _color
.blue();
132 int k
= (key
% cache_size
) * cache_buckets
;
133 int i
= 0; // loop variable
134 BGCCacheItem
*c
= cache
[ k
], *prev
= 0;
136 // this will either loop 8 times then return/abort or it will stop matching
138 (c
->ctx
->pixel
!= pixel
|| c
->ctx
->function
!= _function
||
139 c
->ctx
->subwindow
!= _subwindow
|| c
->ctx
->screen
!= screen
)) {
146 if (c
->count
== 0 && c
->ctx
->screen
== screen
) {
147 // use this cache item
148 c
->ctx
->set(_color
, _font
, _function
, _subwindow
);
155 fprintf(stderr
, "BGCCache: cache fault\n");
159 const unsigned long fontid
= _font
? _font
->fid
: 0;
161 // reuse existing context
162 if (fontid
&& fontid
!= c
->ctx
->fontid
)
166 if (prev
&& c
->hits
> prev
->hits
) {
171 c
->ctx
= nextContext(screen
);
172 c
->ctx
->set(_color
, _font
, _function
, _subwindow
);
182 void BGCCache::release(BGCCacheItem
*_item
) {
187 void BGCCache::purge(void) {
188 for (unsigned int i
= 0; i
< cache_total_size
; ++i
) {
189 BGCCacheItem
*d
= cache
[ i
];
191 if (d
->ctx
&& d
->count
== 0) {
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