From 3ae9f9432e0df88db99fc7aaadaea3b35bda1f9a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Sl=C3=A1vek=20Banko?= Date: Sat, 26 Mar 2016 23:52:42 +0100 Subject: Initial TDE conversion MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Slávek Banko --- src/twin/misc.cpp | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 src/twin/misc.cpp (limited to 'src/twin/misc.cpp') diff --git a/src/twin/misc.cpp b/src/twin/misc.cpp new file mode 100644 index 0000000..2da6b5b --- /dev/null +++ b/src/twin/misc.cpp @@ -0,0 +1,49 @@ +/* Plastik KWin window decoration + Copyright (C) 2003 Sandro Giessl + + based on the window decoration "Web": + Copyright (C) 2001 Rik Hemsley (rikkus) + + 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 +#include + +#include +#include +#include + +#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; +} + -- cgit v1.2.1