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/* Plastik KWin window decoration
Copyright (C) 2003 Sandro Giessl <ceebx@users.sourceforge.net>
based on the window decoration "Web":
Copyright (C) 2001 Rik Hemsley (rikkus) <rik@kde.org>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This program 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <kpixmap.h>
#include <kpixmapeffect.h>
#include <tqcolor.h>
#include <tqimage.h>
#include <tqpainter.h>
#include "misc.h"
TQColor hsvRelative(const TQColor& baseColor, int relativeH, int relativeS, int relativeV)
{
int h, s, v;
baseColor.hsv(&h, &s, &v);
h += relativeH;
s += relativeS;
v += relativeV;
if(h < 0) { h = 0; }
else if(h > 359) { h = 359; }
if(s < 0) { s = 0; }
else if(s > 255) { s = 255; }
if(v < 0) { v = 0; }
else if(v > 255) { v = 255; }
TQColor c;
c.setHsv( h, s, v );
return c;
}
TQColor alphaBlendColors(const TQColor &bgColor, const TQColor &fgColor, const int a)
{
// normal button...
QRgb rgb = bgColor.rgb();
QRgb 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( qRgb(qRed(rgb_b)*inv_alpha/255 + qRed(rgb)*alpha/255,
qGreen(rgb_b)*inv_alpha/255 + qGreen(rgb)*alpha/255,
qBlue(rgb_b)*inv_alpha/255 + qBlue(rgb)*alpha/255) );
return result;
}
TQImage recolorImage(TQImage *img, TQColor color) {
TQImage destImg(img->width(),img->height(),32);
destImg.setAlphaBuffer(true);
for (int x = 0; x < img->width(); x++) {
for (int y = 0; y < img->height(); y++) {
if(img->pixel(x,y) == qRgb(0,0,255) ) {
destImg.setPixel(x,y,color.rgb() ); // set to the new color
} else {
destImg.setPixel(x,y,qRgba(0,0,0,0) ); // set transparent...
}
}
}
return destImg;
}
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