Dogcows Code - chaz/openbox/blob - src/Color.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2 // Color.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>
   5 //
   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:
  12 //
  13 // The above copyright notice and this permission notice shall be included in
  14 // all copies or substantial portions of the Software.
  15 //
  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.
  23
  24 #ifdef HAVE_CONFIG_H
  25 #  include "../config.h"
  26 #endif // HAVE_CONFIG_H
  27
  28 extern "C" {
  29 #include <stdio.h>
  30 }
  31
  32 #include <assert.h>
  33
  34 #include "Color.hh"
  35 #include "BaseDisplay.hh"
  36
  37
  38 BColor::ColorCache BColor::colorcache;
  39 bool BColor::cleancache = false;
  40
  41 BColor::BColor(const BaseDisplay * const _display, unsigned int _screen)
  42   : allocated(false), r(-1), g(-1), b(-1), p(0), dpy(_display), scrn(_screen)
  43 {}
  44
  45 BColor::BColor(int _r, int _g, int _b,
  46                const BaseDisplay * const _display, unsigned int _screen)
  47   : allocated(false), r(_r), g(_g), b(_b), p(0), dpy(_display), scrn(_screen)
  48 {}
  49
  50
  51 BColor::BColor(const std::string &_name,
  52                const BaseDisplay * const _display, unsigned int _screen)
  53   : allocated(false), r(-1), g(-1), b(-1), p(0), dpy(_display), scrn(_screen),
  54     colorname(_name) {
  55   parseColorName();
  56 }
  57
  58
  59 BColor::~BColor(void) {
  60   deallocate();
  61 }
  62
  63
  64 void BColor::setDisplay(const BaseDisplay * const _display,
  65                         unsigned int _screen) {
  66   if (_display == display() && _screen == screen()) {
  67     // nothing to do
  68     return;
  69   }
  70
  71   deallocate();
  72
  73   dpy = _display;
  74   scrn = _screen;
  75
  76   if (! colorname.empty()) {
  77     parseColorName();
  78   }
  79 }
  80
  81
  82 unsigned long BColor::pixel(void) const {
  83   if (! allocated) {
  84     // mutable
  85     BColor *that = (BColor *) this;
  86     that->allocate();
  87   }
  88
  89   return p;
  90 }
  91
  92
  93 void BColor::parseColorName(void) {
  94   assert(dpy != 0);
  95
  96   if (colorname.empty()) {
  97     fprintf(stderr, "BColor: empty colorname, cannot parse (using black)\n");
  98     setRGB(0, 0, 0);
  99   }
 100
 101   if (scrn == ~(0u))
 102     scrn = DefaultScreen(display()->getXDisplay());
 103   Colormap colormap = display()->getScreenInfo(scrn)->getColormap();
 104
 105   // get rgb values from colorname
 106   XColor xcol;
 107   xcol.red = 0;
 108   xcol.green = 0;
 109   xcol.blue = 0;
 110   xcol.pixel = 0;
 111
 112   if (! XParseColor(display()->getXDisplay(), colormap,
 113                     colorname.c_str(), &xcol)) {
 114     fprintf(stderr, "BColor::allocate: color parse error: \"%s\"\n",
 115             colorname.c_str());
 116     setRGB(0, 0, 0);
 117     return;
 118   }
 119
 120   setRGB(xcol.red >> 8, xcol.green >> 8, xcol.blue >> 8);
 121 }
 122
 123
 124 void BColor::allocate(void) {
 125   assert(dpy != 0);
 126
 127   if (scrn == ~(0u)) scrn = DefaultScreen(display()->getXDisplay());
 128   Colormap colormap = display()->getScreenInfo(scrn)->getColormap();
 129
 130   if (! isValid()) {
 131     if (colorname.empty()) {
 132       fprintf(stderr, "BColor: cannot allocate invalid color (using black)\n");
 133       setRGB(0, 0, 0);
 134     } else {
 135       parseColorName();
 136     }
 137   }
 138
 139   // see if we have allocated this color before
 140   RGB rgb(display(), scrn, r, g, b);
 141   ColorCache::iterator it = colorcache.find(rgb);
 142   if (it != colorcache.end()) {
 143     // found
 144     allocated = true;
 145     p = (*it).second.p;
 146     (*it).second.count++;
 147     return;
 148   }
 149
 150   // allocate color from rgb values
 151   XColor xcol;
 152   xcol.red =   r | r << 8;
 153   xcol.green = g | g << 8;
 154   xcol.blue =  b | b << 8;
 155   xcol.pixel = 0;
 156
 157   if (! XAllocColor(display()->getXDisplay(), colormap, &xcol)) {
 158     fprintf(stderr, "BColor::allocate: color alloc error: rgb:%x/%x/%x\n",
 159             r, g, b);
 160     xcol.pixel = 0;
 161   }
 162
 163   p = xcol.pixel;
 164   allocated = true;
 165
 166   colorcache.insert(ColorCacheItem(rgb, PixelRef(p)));
 167
 168   if (cleancache)
 169     doCacheCleanup();
 170 }
 171
 172
 173 void BColor::deallocate(void) {
 174   if (! allocated)
 175     return;
 176
 177   assert(dpy != 0);
 178
 179   ColorCache::iterator it = colorcache.find(RGB(display(), scrn, r, g, b));
 180   if (it != colorcache.end()) {
 181     if ((*it).second.count >= 1)
 182       (*it).second.count--;
 183   }
 184
 185   if (cleancache)
 186     doCacheCleanup();
 187
 188   allocated = false;
 189 }
 190
 191
 192 BColor &BColor::operator=(const BColor &c) {
 193   deallocate();
 194
 195   setRGB(c.r, c.g, c.b);
 196   colorname = c.colorname;
 197   dpy = c.dpy;
 198   scrn = c.scrn;
 199   return *this;
 200 }
 201
 202
 203 void BColor::cleanupColorCache(void) {
 204   cleancache = true;
 205 }
 206
 207
 208 void BColor::doCacheCleanup(void) {
 209   // ### TODO - support multiple displays!
 210   ColorCache::iterator it = colorcache.begin();
 211   if (it == colorcache.end()) {
 212     // nothing to do
 213     return;
 214   }
 215
 216   const BaseDisplay* const display = (*it).first.display;
 217   unsigned long *pixels = new unsigned long[ colorcache.size() ];
 218   unsigned int i, count;
 219
 220   for (i = 0; i < display->getNumberOfScreens(); i++) {
 221     count = 0;
 222     it = colorcache.begin();
 223
 224     while (it != colorcache.end()) {
 225       if ((*it).second.count != 0 || (*it).first.screen != i) {
 226         ++it;
 227         continue;
 228       }
 229
 230       pixels[ count++ ] = (*it).second.p;
 231       ColorCache::iterator it2 = it;
 232       ++it;
 233       colorcache.erase(it2);
 234     }
 235
 236     if (count > 0)
 237       XFreeColors(display->getXDisplay(),
 238                   display->getScreenInfo(i)->getColormap(),
 239                   pixels, count, 0);
 240   }
 241
 242   delete [] pixels;
 243   cleancache = false;
 244 }