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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
/*
Sonic Visualiser
An audio file viewer and annotation editor.
Centre for Digital Music, Queen Mary, University of London.
This file copyright 2007 QMUL.
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. See the file
COPYING included with this distribution for more information.
*/
#include "IconLoader.h"
#include <QPixmap>
#include <QApplication>
#include <QPainter>
#include <QPalette>
static const char *autoInvertExceptions[] = {
// These are the icons that look OK in their default colours, even
// in a colour scheme with a black background. (They may also be
// icons that would look worse if we tried to auto-invert them.)
// If we have icons that look bad when auto-inverted but that are
// not suitable for use without being inverted, we'll need to
// supply inverted versions -- the loader will load xx_inverse.png
// in preference to xx.png if a dark background is found.)
"fileclose",
"filenew-22",
"filenew",
"fileopen-22",
"fileopen",
"fileopenaudio",
"fileopensession",
"filesave-22",
"filesave",
"filesaveas-22",
"filesaveas",
"help",
"editcut",
"editcopy",
"editpaste",
"editdelete",
"exit",
"zoom-fit",
"zoom-in",
"zoom-out",
"zoom"
};
QIcon
IconLoader::load(QString name)
{
QPixmap pmap(loadPixmap(name));
if (pmap.isNull()) return QIcon();
else return QIcon(pmap);
}
QPixmap
IconLoader::loadPixmap(QString name)
{
QColor bg = QApplication::palette().window().color();
if (bg.red() + bg.green() + bg.blue() > 384) { // light background
QPixmap pmap(QString(":icons/%1").arg(name));
if (pmap.isNull()) {
pmap = QPixmap(QString(":icons/%1.png").arg(name));
}
return pmap;
}
QPixmap pmap(QString(":icons/%1").arg(name));
if (pmap.isNull()) {
pmap = QPixmap(QString(":icons/%1_inverse.png").arg(name));
if (pmap.isNull()) {
pmap = QPixmap(QString(":icons/%1.png").arg(name));
}
}
if (pmap.isNull()) return pmap;
for (int i = 0; i < int(sizeof(autoInvertExceptions)/
sizeof(autoInvertExceptions[0])); ++i) {
if (autoInvertExceptions[i] == name) {
return pmap;
}
}
// No suitable inverted icon found for black background; try to
// auto-invert the default one
QImage img = pmap.toImage().convertToFormat(QImage::Format_ARGB32);
for (int y = 0; y < img.height(); ++y) {
for (int x = 0; x < img.width(); ++x) {
QRgb rgba = img.pixel(x, y);
QColor colour = QColor
(qRed(rgba), qGreen(rgba), qBlue(rgba), qAlpha(rgba));
int alpha = colour.alpha();
if (colour.saturation() < 5 && colour.alpha() > 10) {
colour.setHsv(colour.hue(),
colour.saturation(),
255 - colour.value());
colour.setAlpha(alpha);
img.setPixel(x, y, colour.rgba());
}
}
}
pmap = QPixmap::fromImage(img);
return pmap;
}
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