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114 lines
3.2 KiB
C++
114 lines
3.2 KiB
C++
/*
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icoutils_common.cpp - Extract Microsoft Window icons and images using icoutils package
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Copyright (c) 2009-2010 by Pali Rohár <pali.rohar@gmail.com>
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*************************************************************************
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* *
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* This library is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public *
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* License as published by the Free Software Foundation; either *
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* version 2 of the License, or (at your option) any later version. *
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* *
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*************************************************************************
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*/
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#include "icoutils.h"
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#include <QList>
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#include <QString>
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#include <QTemporaryFile>
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#include <QImage>
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#include <QImageReader>
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bool IcoUtils::loadIcoImageFromExe(QIODevice * inputDevice, QImage &image, int needWidth, int needHeight, const qint32 iconNumber)
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{
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QTemporaryFile inputFile;
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if ( ! inputFile.open() )
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return false;
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QByteArray data = inputDevice->readAll();
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if ( inputFile.write(data) == -1 )
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return false;
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return IcoUtils::loadIcoImageFromExe(inputFile.fileName(), image, needWidth, needHeight, iconNumber);
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}
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bool IcoUtils::loadIcoImageFromExe(const QString &inputFileName, QImage &image, int needWidth, int needHeight, const qint32 iconNumber)
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{
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QTemporaryFile outputFile;
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if ( ! outputFile.open() )
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return false;
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if ( ! IcoUtils::loadIcoImageFromExe(inputFileName, outputFile.fileName(), iconNumber) )
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return false;
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return IcoUtils::loadIcoImage(outputFile.fileName(), image, needWidth, needHeight);
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}
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bool IcoUtils::loadIcoImage(QImageReader &reader, QImage &image, int needWidth, int needHeight)
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{
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if ( ! reader.canRead() )
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return false;
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QList <QImage> icons;
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do icons << reader.read();
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while ( reader.jumpToNextImage() );
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if ( icons.empty() )
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return false;
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int min_w = 1024;
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int min_h = 1024;
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int index = icons.size() - 1;
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// we loop in reverse order because QtIcoHandler converts all images to 32-bit depth, and resources are ordered from lower depth to higher depth
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for ( int i_index = icons.size() - 1; i_index >= 0 ; --i_index )
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{
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const QImage &icon = icons.at(i_index);
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int i_width = icon.width();
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int i_height = icon.height();
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int i_w = qAbs(i_width - needWidth);
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int i_h = qAbs(i_height - needHeight);
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if ( i_w < min_w || ( i_w == min_w && i_h < min_h ) )
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{
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min_w = i_w;
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min_h = i_h;
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index = i_index;
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}
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}
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image = icons.at(index);
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return true;
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}
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bool IcoUtils::loadIcoImage(QIODevice * inputDevice, QImage &image, int needWidth, int needHeight)
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{
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QImageReader reader(inputDevice, "ico");
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return IcoUtils::loadIcoImage(reader, image, needWidth, needHeight);
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}
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bool IcoUtils::loadIcoImage(const QString &inputFileName, QImage &image, int needWidth, int needHeight)
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{
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QImageReader reader(inputFileName, "ico");
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return IcoUtils::loadIcoImage(reader, image, needWidth, needHeight);
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}
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