1 files changed, 38 insertions, 0 deletions
diff --git a/src/misc.cpp b/src/misc.cpp
new file mode 100644
index 0000000..2f1d30c
--- /dev/null
+++ b/src/misc.cpp
@@ -0,0 +1,38 @@
+/*
+ * 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 <qcolor.h>
+#include "misc.h"
+
+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;
+}