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A new PNG spec

(www.programmax.net)
616 points bluedel | 4 comments | 24 Jun 25 13:01 UTC | HN request time: 1.016s | source
1. meindnoch ◴[25 Jun 25 08:35 UTC] No.44374958[source]▶
Parallel compression/decompression is already possible via Z_SYNC_FLUSH.
replies(1): >>44376784 #
2. Retr0id ◴[25 Jun 25 12:57 UTC] No.44376784[source]▶
Parallel decompression of Z_SYNC_FLUSH'd data is not possible without additional metadata to tell you where the sync points are.
replies(1): >>44380334 #
3. meindnoch ◴[25 Jun 25 18:19 UTC] No.44380334[source]▶
True. Although this can be mitigated in a backwards compatible manner, by adding a new PNG chunk that points to the locations of the sync points.
replies(1): >>44380403 #
4. Retr0id ◴[25 Jun 25 18:26 UTC] No.44380403{3}[source]▶
Yes, such a chunk is being considered for introduction in future PNG revisions.