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

   1 // XScreen.cc for Openbox
   2 // Copyright (c) 2002 - 2002 Ben Janens (ben at orodu.net)
   3 //
   4 // Permission is hereby granted, free of charge, to any person obtaining a
   5 // copy of this software and associated documentation files (the "Software"),
   6 // to deal in the Software without restriction, including without limitation
   7 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8 // and/or sell copies of the Software, and to permit persons to whom the
   9 // Software is furnished to do so, subject to the following conditions:
  10 //
  11 // The above copyright notice and this permission notice shall be included in
  12 // all copies or substantial portions of the Software.
  13 //
  14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  19 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  20 // DEALINGS IN THE SOFTWARE.
  21
  22 #include "XScreen.h"
  23 #include "Geometry.h"
  24
  25 XScreen::XScreen(const Display *display, const unsigned int number) {
  26   _display = display;
  27   _number = number;
  28
  29   _root = RootWindow(_display, _number);
  30   _size = Size(WidthOfScreen(ScreenOfDisplay(_display, _number)),
  31                HeightOfScreen(ScreenOfDisplay(_display, _number)));
  32   setColorData();
  33 }
  34
  35
  36 /*
  37  * This sets up the _depth, _visual, and _colormap properties.
  38  */
  39 void XScreen::setColorData() {
  40   _depth = DefaultDepth(_display, _number);
  41   _visual = (Visual *) 0;
  42
  43   // search for a TrueColor Visual. If we can't find one, use the default
  44   // visual for the screen
  45   XVisualInfo vinfo_template, *vinfo_return;
  46   int vinfo_nitems;
  47
  48   vinfo_template.screen = _number;
  49   vinfo_template.c_class = TrueColor;
  50
  51   vinfo_return = XGetVisualInfo(_display, VisualScreenMask | VisualClassMask,
  52                                 &vinfo_template, &vinfo_nitems);
  53   if (vinfo_return && vinfo_nitems > 0) {
  54     for (int i = 0; i < vinfo_nitems; i++)
  55       if (_depth < (vinfo_return + i)->depth) {
  56         _depth = (vinfo_return + i)->depth;
  57         _visual = (vinfo_return + i)->visual;
  58       }
  59     XFree(vinfo_return);
  60   }
  61   if (visual)
  62     _colormap = XCreateColormap(_display, _root, _visual, AllocNone);
  63   else {
  64     _visual = DefaultVisual(_display, _number);
  65     _colormap = DefaultColormap(_display, _number);
  66   }
  67 }