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/*
* Copyright 2003, Sandro Giessl <[email protected]>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License version 2 as published by the Free Software Foundation.
*
* 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; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <tqcolor.h>
#include "misc.h"
TQColor alphaBlendColors(const TQColor &bgColor, const TQColor &fgColor, const int a)
{
// normal button...
TQRgb rgb = bgColor.rgb();
TQRgb rgb_b = fgColor.rgb();
int alpha = a;
if(alpha>255) alpha = 255;
if(alpha<0) alpha = 0;
int inv_alpha = 255 - alpha;
TQColor result = TQColor( tqRgb(tqRed(rgb_b)*inv_alpha/255 + tqRed(rgb)*alpha/255,
tqGreen(rgb_b)*inv_alpha/255 + tqGreen(rgb)*alpha/255,
tqBlue(rgb_b)*inv_alpha/255 + tqBlue(rgb)*alpha/255) );
return result;
}
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