.SVG pictures not displayed in Windows XP

[sedi]

Hi,
my application displays svg scaleable images. It's working wonderfully on my own system, but not on the WinXP machine I have to deploy it to.

I have done the following steps:

• added QtSvg4.dll (364kB version) and QtSvgd4.dll (5.465 kB version) to the application directory
• added qsvg4.dll (74kB version) and qsvgd4.dll (727 kB version) to subdir \imageformats
• added qsvgicon4.dll (96kB version) and qsvgicond4.dll (828 kB version) to subdir \iconengines

-In main.cpp I've added the library paths:

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    app.addLibraryPath(QDir::currentPath()+"/imageformats/");
    app.addLibraryPath(QDir::currentPath()+"/iconengines/");
    [--> ...open MainWindow]
}

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    app.addLibraryPath(QDir::currentPath()+"/imageformats/");
    app.addLibraryPath(QDir::currentPath()+"/iconengines/");
    [--> ...open MainWindow]
}

To copy to clipboard, switch view to plain text mode 

I set up the picture this way:

bool ButtonItem::setPicture(QString fileName, QString pixPath)
{
 
    if (fileName.isEmpty()){
        this->fotoPixmapItem->setVisible(false);
        return true;
    }
    this->fotoPixmapItem->setVisible(true);
    QPixmap *pix;
    pix = new QPixmap;
    pix->load(pixPath + fileName);
    bool erfolg = !pix->isNull();
    if (erfolg){
        delete this->fotoPixmap;
        this->fotoPixmap=new QPixmap(*pix);
        this->fotoPixmapItem->setPixmap(pix->scaledToHeight(this->bSize-(this->bSize/15),Qt::FastTransformation));
        this->updateButton();
    }
    delete pix;
    return erfolg;
}

bool ButtonItem::setPicture(QString fileName, QString pixPath)
{

    if (fileName.isEmpty()){
        this->fotoPixmapItem->setVisible(false);
        return true;
    }
    this->fotoPixmapItem->setVisible(true);
    QPixmap *pix;
    pix = new QPixmap;
    pix->load(pixPath + fileName);
    bool erfolg = !pix->isNull();
    if (erfolg){
        delete this->fotoPixmap;
        this->fotoPixmap=new QPixmap(*pix);
        this->fotoPixmapItem->setPixmap(pix->scaledToHeight(this->bSize-(this->bSize/15),Qt::FastTransformation));
        this->updateButton();
    }
    delete pix;
    return erfolg;
}

To copy to clipboard, switch view to plain text mode 

Update:
QImageReader::supportedImageFormats();
shows svg as well as svgz - even on the target system!

Any ideas what I do wrong or miss?

[sedi]

Hm. I have no idea whatsoever why it suddenly started to work like a charm - weird. But anyway - it works and suddenly does so on all systems I test it on.
I let the question remain here because I've not yet seen a full list of all the files / subdirs needed to have svg support - especially regarding the file sizes - many people struggle because of having copied the wrong dlls with identical file names from within the qtdir tree.