News for hackers. Stuff that matters.

A comment on Sierra digital cameras on the Apple II.

Re:Sierra digital cameras on the Apple II by Dwedit on Tuesday September 15, 2026 @10:09PM (#49721347)
So this is a JPEG decoder that runs on an Apple II? Monochrome only, or can it do color?
[ Parent | on HN ]
Re:Sierra digital cameras on the Apple II by colinlm on Wednesday September 16, 2026 @08:49AM (#49726196)
Author here.

Monochrome only, and it downscales. Only 1/4th of the pixels' IDCTs are computed, for "speed". It is also hardcoded for 640x480 images, again, for "speed" :-)

It's based on picojpeg, heavily reworked to get rid of about all intermediate buffers, core decoder functions rewritten in assembly.

[ Parent | on HN ]