Spelunking through JPEG with Racket (Sixth RacketCon)
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The document discusses the exploration of JPEG handling in Racket, emphasizing the need for programming languages to better understand media structures. It details challenges encountered, such as printing large data, array handling, and debugging issues in the DrRacket environment. The author concludes with an invitation for collaboration on improvements and shares a GitHub link for further resources.
Spelunking through JPEG with Racket (Sixth RacketCon)
- 1. Spelunking through JPEG in Racket Andy Wingo ~ wingo@igalia.com wingolog.org ~ @andywingo
- 2. Theses We should work with JPEG and other media from safe languages Our languages should understand the structure of JPEG Guilers and Racketeers should steal more code and ideas from each other
- 3. An idiot in racketland A live demo, in which I make a dog’s dinner of the fine DrRacket
- 7. Lessons learned? DC component: Things mostly just work AC components: Lots of details...
- 8. Easy logand / bitwise-and 1+ / add1 match differences module differences
- 9. Lovely Background expansion in DrRacket Bitmaps in DrRacket Packages very nice struct (module+ test ...)
- 10. Chucklers Same problem Guile has when printing large data (It prints large because structs, equal?, and tests)
- 11. Head-scratchers bytevector-s16-ref with endianness? Why are bytes so stringy? What pronoun to use for struct instances? Port argument to write-bytes optional? (Compare to R6RS) No embedded array literals? Why no right-click in DrRacket?
- 12. Gnarlies No generic array facility math/array weird array-map lazy but not documented as such Unfolds over arrays hard Reloads versus incremental dev