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

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #ifdef HAVE_CONFIG_H
   4 #  include "../config.h"
   5 #endif // HAVE_CONFIG_H
   6
   7 extern "C" {
   8 #include <stdio.h>
   9 }
  10
  11 #include <assert.h>
  12
  13 #include "color.hh"
  14 #include "basedisplay.hh"
  15
  16
  17 BColor::ColorCache BColor::colorcache;
  18 bool BColor::cleancache = false;
  19
  20 BColor::BColor(const BaseDisplay * const _display, unsigned int _screen)
  21   : allocated(false), r(-1), g(-1), b(-1), p(0), dpy(_display), scrn(_screen)
  22 {}
  23
  24 BColor::BColor(int _r, int _g, int _b,
  25                const BaseDisplay * const _display, unsigned int _screen)
  26   : allocated(false), r(_r), g(_g), b(_b), p(0), dpy(_display), scrn(_screen)
  27 {}
  28
  29
  30 BColor::BColor(const std::string &_name,
  31                const BaseDisplay * const _display, unsigned int _screen)
  32   : allocated(false), r(-1), g(-1), b(-1), p(0), dpy(_display), scrn(_screen),
  33     colorname(_name) {
  34   parseColorName();
  35 }
  36
  37
  38 BColor::~BColor(void) {
  39   deallocate();
  40 }
  41
  42
  43 void BColor::setDisplay(const BaseDisplay * const _display,
  44                         unsigned int _screen) {
  45   if (_display == display() && _screen == screen()) {
  46     // nothing to do
  47     return;
  48   }
  49
  50   deallocate();
  51
  52   dpy = _display;
  53   scrn = _screen;
  54
  55   if (! colorname.empty()) {
  56     parseColorName();
  57   }
  58 }
  59
  60
  61 unsigned long BColor::pixel(void) const {
  62   if (! allocated) {
  63     // mutable
  64     BColor *that = (BColor *) this;
  65     that->allocate();
  66   }
  67
  68   return p;
  69 }
  70
  71
  72 void BColor::parseColorName(void) {
  73   assert(dpy != 0);
  74
  75   if (colorname.empty()) {
  76     fprintf(stderr, "BColor: empty colorname, cannot parse (using black)\n");
  77     setRGB(0, 0, 0);
  78   }
  79
  80   if (scrn == ~(0u))
  81     scrn = DefaultScreen(display()->getXDisplay());
  82   Colormap colormap = display()->getScreenInfo(scrn)->getColormap();
  83
  84   // get rgb values from colorname
  85   XColor xcol;
  86   xcol.red = 0;
  87   xcol.green = 0;
  88   xcol.blue = 0;
  89   xcol.pixel = 0;
  90
  91   if (! XParseColor(display()->getXDisplay(), colormap,
  92                     colorname.c_str(), &xcol)) {
  93     fprintf(stderr, "BColor::allocate: color parse error: \"%s\"\n",
  94             colorname.c_str());
  95     setRGB(0, 0, 0);
  96     return;
  97   }
  98
  99   setRGB(xcol.red >> 8, xcol.green >> 8, xcol.blue >> 8);
 100 }
 101
 102
 103 void BColor::allocate(void) {
 104   assert(dpy != 0);
 105
 106   if (scrn == ~(0u)) scrn = DefaultScreen(display()->getXDisplay());
 107   Colormap colormap = display()->getScreenInfo(scrn)->getColormap();
 108
 109   if (! isValid()) {
 110     if (colorname.empty()) {
 111       fprintf(stderr, "BColor: cannot allocate invalid color (using black)\n");
 112       setRGB(0, 0, 0);
 113     } else {
 114       parseColorName();
 115     }
 116   }
 117
 118   // see if we have allocated this color before
 119   RGB rgb(display(), scrn, r, g, b);
 120   ColorCache::iterator it = colorcache.find(rgb);
 121   if (it != colorcache.end()) {
 122     // found
 123     allocated = true;
 124     p = (*it).second.p;
 125     (*it).second.count++;
 126     return;
 127   }
 128
 129   // allocate color from rgb values
 130   XColor xcol;
 131   xcol.red =   r | r << 8;
 132   xcol.green = g | g << 8;
 133   xcol.blue =  b | b << 8;
 134   xcol.pixel = 0;
 135
 136   if (! XAllocColor(display()->getXDisplay(), colormap, &xcol)) {
 137     fprintf(stderr, "BColor::allocate: color alloc error: rgb:%x/%x/%x\n",
 138             r, g, b);
 139     xcol.pixel = 0;
 140   }
 141
 142   p = xcol.pixel;
 143   allocated = true;
 144
 145   colorcache.insert(ColorCacheItem(rgb, PixelRef(p)));
 146
 147   if (cleancache)
 148     doCacheCleanup();
 149 }
 150
 151
 152 void BColor::deallocate(void) {
 153   if (! allocated)
 154     return;
 155
 156   assert(dpy != 0);
 157
 158   ColorCache::iterator it = colorcache.find(RGB(display(), scrn, r, g, b));
 159   if (it != colorcache.end()) {
 160     if ((*it).second.count >= 1)
 161       (*it).second.count--;
 162   }
 163
 164   if (cleancache)
 165     doCacheCleanup();
 166
 167   allocated = false;
 168 }
 169
 170
 171 BColor &BColor::operator=(const BColor &c) {
 172   deallocate();
 173
 174   setRGB(c.r, c.g, c.b);
 175   colorname = c.colorname;
 176   dpy = c.dpy;
 177   scrn = c.scrn;
 178   return *this;
 179 }
 180
 181
 182 void BColor::cleanupColorCache(void) {
 183   cleancache = true;
 184 }
 185
 186
 187 void BColor::doCacheCleanup(void) {
 188   // ### TODO - support multiple displays!
 189   ColorCache::iterator it = colorcache.begin();
 190   if (it == colorcache.end()) {
 191     // nothing to do
 192     return;
 193   }
 194
 195   const BaseDisplay* const display = (*it).first.display;
 196   unsigned long *pixels = new unsigned long[ colorcache.size() ];
 197   unsigned int i, count;
 198
 199   for (i = 0; i < display->getNumberOfScreens(); i++) {
 200     count = 0;
 201     it = colorcache.begin();
 202
 203     while (it != colorcache.end()) {
 204       if ((*it).second.count != 0 || (*it).first.screen != i) {
 205         ++it;
 206         continue;
 207       }
 208
 209       pixels[ count++ ] = (*it).second.p;
 210       ColorCache::iterator it2 = it;
 211       ++it;
 212       colorcache.erase(it2);
 213     }
 214
 215     if (count > 0)
 216       XFreeColors(display->getXDisplay(),
 217                   display->getScreenInfo(i)->getColormap(),
 218                   pixels, count, 0);
 219   }
 220
 221   delete [] pixels;
 222   cleancache = false;
 223 }