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,
49 pixel = gcv.foreground = _color.pixel();
50 function = gcv.function = _function;
51 subwindow = gcv.subwindow_mode = _subwindow;
52 linewidth = gcv.line_width = _linewidth;
53 gcv.cap_style = CapProjecting;
55 unsigned long mask = GCForeground | GCFunction | GCSubwindowMode |
56 GCLineWidth | GCCapStyle;
59 fontid = gcv.font = _font->fid;
65 XChangeGC(display->getXDisplay(), gc, mask, &gcv);
69 void BGCCacheContext::set(const XFontStruct * const _font) {
76 fontid = gcv.font = _font->fid;
77 XChangeGC(display->getXDisplay(), gc, GCFont, &gcv);
81 BGCCache::BGCCache(const BaseDisplay * const _display,
82 unsigned int screen_count)
83 : display(_display), context_count(128u),
84 cache_size(16u), cache_buckets(8u * screen_count),
85 cache_total_size(cache_size * cache_buckets) {
87 contexts = new BGCCacheContext*[context_count];
89 for (i = 0; i < context_count; i++) {
90 contexts[i] = new BGCCacheContext(display);
93 cache = new BGCCacheItem*[cache_total_size];
94 for (i = 0; i < cache_total_size; ++i) {
95 cache[i] = new BGCCacheItem;
100 BGCCache::~BGCCache(void) {
101 std::for_each(contexts, contexts + context_count, PointerAssassin());
102 std::for_each(cache, cache + cache_total_size, PointerAssassin());
108 BGCCacheContext *BGCCache::nextContext(unsigned int scr) {
109 Window hd = display->getScreenInfo(scr)->getRootWindow();
113 for (unsigned int i = 0; i < context_count; ++i) {
117 c->gc = XCreateGC(display->getXDisplay(), hd, 0, 0);
121 if (! c->used && c->screen == scr)
125 fprintf(stderr, "BGCCache: context fault!\n");
127 return (BGCCacheContext*) 0; // not reached
131 void BGCCache::release(BGCCacheContext *ctx) {
136 BGCCacheItem *BGCCache::find(const BColor &_color,
137 const XFontStruct * const _font,
138 int _function, int _subwindow, int _linewidth) {
139 const unsigned long pixel = _color.pixel();
140 const unsigned int screen = _color.screen();
141 const int key = _color.red() ^ _color.green() ^ _color.blue();
142 int k = (key % cache_size) * cache_buckets;
143 unsigned int i = 0; // loop variable
144 BGCCacheItem *c = cache[ k ], *prev = 0;
147 this will either loop cache_buckets times then return/abort or
148 it will stop matching
151 (c->ctx->pixel != pixel || c->ctx->function != _function ||
152 c->ctx->subwindow != _subwindow || c->ctx->screen != screen ||
153 c->ctx->linewidth != _linewidth)) {
154 if (i < (cache_buckets - 1)) {
160 if (c->count == 0 && c->ctx->screen == screen) {
161 // use this cache item
162 c->ctx->set(_color, _font, _function, _subwindow, _linewidth);
169 fprintf(stderr, "BGCCache: cache fault, count: %d, screen: %d, item screen: %d\n", c->count, screen, c->ctx->screen);
174 // reuse existing context
175 if (_font && _font->fid && _font->fid != c->ctx->fontid)
179 if (prev && c->hits > prev->hits) {
184 c->ctx = nextContext(screen);
185 c->ctx->set(_color, _font, _function, _subwindow, _linewidth);
195 void BGCCache::release(BGCCacheItem *_item) {
200 void BGCCache::purge(void) {
201 for (unsigned int i = 0; i < cache_total_size; ++i) {
202 BGCCacheItem *d = cache[ i ];
204 if (d->ctx && d->count == 0) {