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//
// "$Id: Fl_own_colormap.cxx 5190 2006-06-09 16:16:34Z mike $"
//
// Private colormap support for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2005 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
// Using the default system colormap can be a bad idea on PseudoColor
// visuals, since typically every application uses the default colormap and
// you can run out of colormap entries easily.
//
// The solution is to always create a new colormap on PseudoColor displays
// and copy the first 16 colors from the default colormap so that we won't
// get huge color changes when switching windows.
#include <config.h>
#include <FL/Fl.H>
#include <FL/x.H>
#ifdef WIN32
// There is probably something relevant to do on MSWindows 8-bit displays
// but I don't know what it is
void Fl::own_colormap() {}
#elif defined(__APPLE__)
// MacOS X always provides a TrueColor interface...
void Fl::own_colormap() {}
#else
// X version
void Fl::own_colormap() {
fl_open_display();
#if USE_COLORMAP
switch (fl_visual->c_class) {
case GrayScale :
case PseudoColor :
case DirectColor :
break;
default:
return; // don't do anything for non-colormapped visuals
}
int i;
XColor colors[16];
// Get the first 16 colors from the default colormap...
for (i = 0; i < 16; i ++) colors[i].pixel = i;
XQueryColors(fl_display, fl_colormap, colors, 16);
// Create a new colormap...
fl_colormap = XCreateColormap(fl_display,
RootWindow(fl_display,fl_screen),
fl_visual->visual, AllocNone);
// Copy those first 16 colors to our own colormap:
for (i = 0; i < 16; i ++)
XAllocColor(fl_display, fl_colormap, colors + i);
#endif
}
#endif
//
// End of "$Id: Fl_own_colormap.cxx 5190 2006-06-09 16:16:34Z mike $".
//
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