Hi Andrey On Wed, May 08, 2013 at 10:34:29AM +0300, Andrey Utkin wrote: > I use the feature of changing image print density (in dpi) in GIMP to > get predictable size of printed image. Now i want to do this > programmaticaly. I tried to grep the code, but it would take me long > time to figure this out by myself. Could please somebody describe in > which way png file carries pixel density information, or point to the > place in code that actually does this information saving to file. > Thanks in advance.
Look at file-png.c in the GIMP source code tree. See where libpng's
png_set_pHYs() function is called in save_image().
Mukund
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