IrfanView (3.97 and 4.10) won't save transparency correctly when I convert a GIF to PNG.
If I uncheck "Save Transparent Color", IV replaces transparency with the background color (the transparency is lost altogether).
If I check "Save Transparent Color", IV sets those pixels to transparency which are not transparent, but happen to be the same as the background color; that is bad! (Moreover, this manual popup thing kills batch processing; it's really bad if you have 40 popups and can't quit!!)
The proper behavior probably is to save transparency as found in the GIF file without using the "Save Transparent Color" popup. (E.g. GIMP 2 does what I need when I load the GIF and save as PNG.)
Example image:
Test html:
<html><body style="background:#000"><img src=Icons-mini-action_back.png></body></html>
IV's batch image converter would be ideal for web developers to move from legacy GIFs to PNGs, it would be great to have this issue fixed!
Thanks!
If I uncheck "Save Transparent Color", IV replaces transparency with the background color (the transparency is lost altogether).
If I check "Save Transparent Color", IV sets those pixels to transparency which are not transparent, but happen to be the same as the background color; that is bad! (Moreover, this manual popup thing kills batch processing; it's really bad if you have 40 popups and can't quit!!)
The proper behavior probably is to save transparency as found in the GIF file without using the "Save Transparent Color" popup. (E.g. GIMP 2 does what I need when I load the GIF and save as PNG.)
Example image:
Test html:
<html><body style="background:#000"><img src=Icons-mini-action_back.png></body></html>
IV's batch image converter would be ideal for web developers to move from legacy GIFs to PNGs, it would be great to have this issue fixed!
Thanks!
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