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iperender does not store png pixel density in metadata #183

antiskid56 opened this Issue Apr 24, 2018 · 1 comment


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antiskid56 commented Apr 24, 2018

The png files produced by iperender do not have a pixel density associated with them in their meta-data. This makes it difficult to import png files containing text with a font size that is consistent with expectations.

I have been using the convert program from the imagemagick package to add the dpi setting to the png metadata, like this:

$ convert -units PixelsPerInch input.png -density 300 output.png

but it would be very nice if this were not necessary.


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otfried commented Sep 16, 2018

Ipe relies on the CAIRO library to create the PNG file, and this does not offer the option of saving the pixel density. So this would be hard to fix.

@otfried otfried self-assigned this Sep 16, 2018

@otfried otfried added the enhancement label Sep 17, 2018

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