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Author SHA1 Message Date

Author	SHA1	Message	Date
Karol Kosek	b5420b8a9a	LibGfx: Implement PNG filtering on write Is it another great upgrade to our PNG encoder like in `9aafaec259`? Well, not really - it's not a 2x or 55x improvement like you saw there, but still it saves something: - a screenshot of a blank Serenity desktop dropped from about 45 KiB to 40 KiB. - re-encoding NASA photo of the Earth to PNG again saves about 25% (16.5 MiB -> 12.3 MiB), compared to not using filters. [1]: https://commons.wikimedia.org/wiki/File:The_Blue_Marble_(remastered).jpg	2022-07-10 15:01:07 +02:00
Karol Kosek	98a90d79de	LibGfx: Move PNG header and paeth_predictor function to a shared header	2022-07-10 15:01:07 +02:00
Karol Kosek	ebc20f7ac3	LibGfx: Use enum instead of magic numbers for PNG Color and Filter types	2022-07-10 15:01:07 +02:00

Karol Kosek

b5420b8a9a

LibGfx: Implement PNG filtering on write

Is it another great upgrade to our PNG encoder like in 9aafaec259?
Well, not really - it's not a 2x or 55x improvement like you saw there,
but still it saves something:

- a screenshot of a blank Serenity desktop dropped from about 45 KiB
  to 40 KiB.
- re-encoding NASA photo of the Earth to PNG again saves about 25%
  (16.5 MiB -> 12.3 MiB), compared to not using filters.

[1]: https://commons.wikimedia.org/wiki/File:The_Blue_Marble_(remastered).jpg

2022-07-10 15:01:07 +02:00

Karol Kosek

98a90d79de

LibGfx: Move PNG header and paeth_predictor function to a shared header

2022-07-10 15:01:07 +02:00

Karol Kosek

ebc20f7ac3

LibGfx: Use enum instead of magic numbers for PNG Color and Filter types

2022-07-10 15:01:07 +02:00

3 commits