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cmuratori's profile
Casey Muratori
Casey Muratori
Casey Muratori
@cmuratori

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Casey Muratori

@cmuratori

I'm worried that the baby thinks people can't change.

Seattle
caseymuratori.com
Joined March 2009

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    1. Casey Muratori‏ @cmuratori 24 Jun 2018

      PNG turned out to be pretty simple to parse directly from the specs. I was expecting much worse. Less than 12 hours on Handmade Hero, which includes all the time live coding, debugging, and all the explanations of everything as I did it:https://www.youtube.com/watch?v=lkEWbIUEuN0&list=PLEMXAbCVnmY5y4dSkKf297tJqwMxJOk7e …

      2 replies 6 retweets 72 likes
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    2. Casey Muratori‏ @cmuratori 24 Jun 2018

      Since live coding is usually a lot slower (and more error-prone) than regular coding, it seems like it might be reasonable to say that coding a PNG reader from scratch takes only about one work day of time, two at most, even if you have never looked at PNGs before (I had not).

      1 reply 3 retweets 19 likes
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    3. Casey Muratori‏ @cmuratori 24 Jun 2018

      However I would caveat that we didn't bother with multiple bit depths and index palettes, so it is definitely true that an extra day would probably be warranted if one wanted a complete PNG reader that did non-game-style PNGs (eg., not only true-color RGBA).

      3 replies 1 retweet 12 likes
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    4. Tim™ Romero‏ @phort99 24 Jun 2018
      Replying to @cmuratori

      Those features are good to have if you want to support crushed PNGs optimized with something like ImageOptim.

      1 reply 0 retweets 0 likes
    5. Casey Muratori‏ @cmuratori 24 Jun 2018
      Replying to @phort99

      Yes, and they wouldn't be hard to add - they look pretty simple from the spec. But they're definitely not something we need for Handmade Hero. We want lossless data in :)

      1 reply 0 retweets 0 likes
    6. Tim™ Romero‏ @phort99 24 Jun 2018
      Replying to @cmuratori

      ImageOptim is designed for lossless PNG optimization. It removes useless metadata and iterates hard on the compression algorithm. I think data loss can happen but only in 0% Alpha areas.

      1 reply 0 retweets 0 likes
      Casey Muratori‏ @cmuratori 24 Jun 2018
      Replying to @phort99

      I am just speaking generally about what we want for HH. We don't have any need to run some kind of compressor, whether lossless or otherwise. The only reason we're reading PNGs is because we were supporting quick Photoshop export. It is not our data storage format!

      9:45 PM - 24 Jun 2018
      2 replies 0 retweets 0 likes
        1. Casey Muratori‏ @cmuratori 24 Jun 2018
          Replying to @cmuratori @phort99

          So we literally have no need for something like ImageOptim, and thus no need to support reading what it might write.

          0 replies 0 retweets 0 likes
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        1. Tim™ Romero‏ @phort99 24 Jun 2018
          Replying to @cmuratori

          Ah cool, i forgot it wasn’t even your storage format and understand about the game’s need for an intermediate format that’s quick to export/hot-load. Sorry to bother you!

          0 replies 0 retweets 0 likes
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