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leonbloy / pngj

PNGJ : pure Java library for high performance PNG encoding
http://hjg.com.ar/pngj/
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Metadata reports alpha as false, yet image has alpha channel #40

Open Grunthos opened 6 years ago

Grunthos commented 6 years ago

When opened in Gimp, image has transparent areas, yet reader reports no alpha. Am I missing something?

Grunthos commented 6 years ago

Ahhh...I think the image has no alpha it has a transparent colour defined

Grunthos commented 6 years ago

Yep, needed to check for trans block. Would be really convenient if this was automatic.

leonbloy commented 5 years ago

PNG supports transparency in several ways, https://stackoverflow.com/a/13570973/277304

I'm no sure this kind of intelligence belongs to this library, but I'll think it over