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/*
icoutils_common.cpp - Extract Microsoft Window icons and images using icoutils package
Copyright (c) 2009-2010 by Pali Rohár <pali.rohar@gmail.com>
*************************************************************************
* *
* This library 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. *
* *
*************************************************************************
*/
#include "icoutils.h"
#include <QList>
#include <QString>
#include <QTemporaryFile>
#include <QImage>
#include <QImageReader>
#define abs(n) ( ( n < 0 ) ? -n : n )
bool IcoUtils::loadIcoImageFromExe(QIODevice * inputDevice, QImage &image, int needWidth, int needHeight, const qint32 iconNumber)
{
QTemporaryFile inputFile;
if ( ! inputFile.open() )
return false;
QByteArray data = inputDevice->readAll();
if ( inputFile.write(data) == -1 )
return false;
return IcoUtils::loadIcoImageFromExe(inputFile.fileName(), image, needWidth, needHeight, iconNumber);
}
bool IcoUtils::loadIcoImageFromExe(const QString &inputFileName, QImage &image, int needWidth, int needHeight, const qint32 iconNumber)
{
QTemporaryFile outputFile;
if ( ! outputFile.open() )
return false;
if ( ! IcoUtils::loadIcoImageFromExe(inputFileName, outputFile.fileName(), iconNumber) )
return false;
return IcoUtils::loadIcoImage(outputFile.fileName(), image, needWidth, needHeight);
}
bool IcoUtils::loadIcoImage(QImageReader &reader, QImage &image, int needWidth, int needHeight)
{
if ( ! reader.canRead() )
return false;
QList <QImage> icons;
do icons << reader.read();
while ( reader.jumpToNextImage() );
if ( icons.empty() )
return false;
int min_w = 1024;
int min_h = 1024;
int index = icons.size() - 1;
// we loop in reverse order because QtIcoHandler converts all images to 32-bit depth, and resources are ordered from lower depth to higher depth
for ( int i_index = icons.size() - 1; i_index >= 0 ; --i_index )
{
const QImage &icon = icons.at(i_index);
int i_width = icon.width();
int i_height = icon.height();
int i_w = abs(i_width - needWidth);
int i_h = abs(i_height - needHeight);
if ( i_w < min_w || ( i_w == min_w && i_h < min_h ) )
{
min_w = i_w;
min_h = i_h;
index = i_index;
}
}
image = icons.at(index);
return true;
}
bool IcoUtils::loadIcoImage(QIODevice * inputDevice, QImage &image, int needWidth, int needHeight)
{
QImageReader reader(inputDevice, "ico");
return IcoUtils::loadIcoImage(reader, image, needWidth, needHeight);
}
bool IcoUtils::loadIcoImage(const QString &inputFileName, QImage &image, int needWidth, int needHeight)
{
QImageReader reader(inputFileName, "ico");
return IcoUtils::loadIcoImage(reader, image, needWidth, needHeight);
}
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