//
// "$Id: Fl_own_colormap.cpp 508 2002-12-20 20:11:31Z laza2000 $"
//
// Private colormap support for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-1999 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 to "fltk-bugs@easysw.com".
//

// 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 <efltk/Fl.h>
#include <efltk/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() {}

#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.cpp 508 2002-12-20 20:11:31Z laza2000 $".
//
