SVG to QImage and keep ratio

[lni]

Hi,

I need to create an QImage from svg file. How do I keep the ration? Also how do I get all element ids in the svg file?

Here is the code to start. Many thanks.

#include <QApplication>
#include <QSvgRenderer>
#include <QPainter>
#include <QImage>
#include <QDebug>
 
// In your .pro file:
// QT += svg
 
int main(int argc, char **argv)
{
    // A QApplication instance is necessary if fonts are used in the SVG
    QApplication app(argc, argv);
 
    // Load your SVG
    QSvgRenderer renderer(QString("./TW_CHW194.svg"));
 
    qDebug() << "size =" << renderer.defaultSize();
 
    // Prepare a QImage with desired characteritisc
    QImage image(100, 500, QImage::Format_ARGB32);
    image.fill(0xaaA08080);  // partly transparent red-ish background
 
    // Get QPainter that paints to the image
    QPainter painter(&image);
    renderer.render(&painter);
 
    // Save, image format based on file extension
    image.save("./svg-2-image.png");
}

#include <QApplication>
#include <QSvgRenderer>
#include <QPainter>
#include <QImage>
#include <QDebug>

// In your .pro file:
// QT += svg

int main(int argc, char **argv)
{
    // A QApplication instance is necessary if fonts are used in the SVG
    QApplication app(argc, argv);

    // Load your SVG
    QSvgRenderer renderer(QString("./TW_CHW194.svg"));

    qDebug() << "size =" << renderer.defaultSize();

    // Prepare a QImage with desired characteritisc
    QImage image(100, 500, QImage::Format_ARGB32);
    image.fill(0xaaA08080);  // partly transparent red-ish background

    // Get QPainter that paints to the image
    QPainter painter(&image);
    renderer.render(&painter);

    // Save, image format based on file extension
    image.save("./svg-2-image.png");
}

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