QPixmap and SVG

Question

How would you suggest to handle svg with QPixmap?

The construct QPixmap(":/myfile.svg"); then call of scaled() does not work. The QPixmap gets pixelised.

Thx.

Yash · Answer 1 · 2016-05-12T12:42:29.613

39

Now there is much simpler way without needing of SVG module

QIcon("filepath.svg").pixmap(QSize())

So simple and works fine. Atleast in my case it worked.

edited May 12 '16 at 12:42

answered Apr 29 '16 at 10:42

Yash

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At least with respect to the limited use case of icons, **this should now be the accepted answer.** Note that the `QIcon::addFile()` method *also* implicitly accepts SVG files now, permitting each icon mode and state to be associated with its own SVG file. – Cecil Curry Jun 17 '17 at 05:10
This does not scale the SVG up, if it was smaller than this size, it stays the same. – ababak Apr 17 '20 at 14:51
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This is great. But how do you achieve the same thing by creating a scalable icon from an bytearray containing SVG? – Eugene Gill Mar 06 '21 at 18:29

score 9 · Accepted Answer · answered Apr 09 '12 at 20:12

9

You should use SVGRenderer to render it onto a QImage. From there you can convert to a QPixmap with QPixmap::convertFromImage.

answered Apr 09 '12 at 20:12

Troubadour

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Thx, I did like suggested here : http://stackoverflow.com/questions/8551690/qt-how-to-render-scaled-svg-to-qimage – Matthieu Riegler Apr 09 '12 at 20:57
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It is possible to create QPainter over QPixmap and render SVG directly to the QPixmap. – Sergey Galin Jul 30 '14 at 06:19

score 6 · Answer 3 · answered Jul 30 '14 at 06:22

6

Something like that:

QSvgRenderer renderer(svg_file_name);
QPixmap pm(width, height);
pm.fill(fill_color);
QPainter painter(&pm);
renderer.render(&painter, pm.rect());

answered Jul 30 '14 at 06:22

Sergey Galin

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score 0 · Answer 4 · answered Feb 21 '23 at 13:35

On Qt5.12 i managed to display SVG icons without pixellisation in a QLabel:

QPixmap logoPixmap(":my-logo.svg"); // set your logo here
auto logoLabel = new QLabel(this);
logoLabel->setPixmap(logoPixmap);
logoLabel->setScaledContents(true);
logoLabel->setFixedSize(176, 61); // set your size here

QPixmap and SVG

4 Answers4

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