Textual information processing in PNG (#239)

Good morning/evening,

Re: issue #239 [1], it looks like there are 3 different ways of
storing textual information in a PNG file: iTXT, zTXt and tEXt.

Couple of questions:

(a) what are current best practices for encoders? In particular, is it
acceptable for encoders to include the same keyword in multiple text
chunks?

(b) what is the level of support in decoders for each of the three
chunks? What is the decoder behavior when encountering the same
keyword in multiple chunks? How widespread is the implementation of
each of the three chunks?

Data points on these questions would help refine the prose, which is
pretty confusing, as identified in #239.

Best,

-- Pierre

[1] https://github.com/w3c/PNG-spec/issues/239

Received on Wednesday, 14 December 2022 18:31:29 UTC