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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 <qcolor.h>
+#include <qimage.h>
+#include <qpainter.h>
+
+#include "misc.h"
+
+QColor hsvRelative(const QColor& 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; }
+
+ QColor c;
+ c.setHsv( h, s, v );
+ return c;
+}
+
+QColor alphaBlendColors(const QColor &bgColor, const QColor &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;
+
+ QColor result = QColor( 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;
+}
+
+QImage recolorImage(QImage *img, QColor color) {
+ QImage 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;
+}