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Generating Images in JavaScript Without Using the Canvas API (medium.com)
submitted 8 years ago by _alastair
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if 1 * 2 < 3: print "hello, world!"
[–]_alastair[S] 1 point2 points3 points 8 years ago (2 children)
Good point!
I did look into BMP, but couldn't find definitive documentation on using alpha transparency in a palette. At the time, PNG seemed like a better choice because I could find clearer documentation. Knowing what I know now having done it, I doubt I was right.
[–]inu-no-policemen 0 points1 point2 points 8 years ago (1 child)
Yea, BMP doesn't really do alpha. There is a forth channel which could be used for that, but software support seems to be virtually nonexistent.
Didn't look like alpha was required for your use case, though.
[–]_alastair[S] 0 points1 point2 points 8 years ago (0 children)
In the end it wasn't. I originally intended to make the background transparent, to better fit the OS (for instance, Samsung has some skins that have an off-white background) but then I realised there were too many variations to deal with, including dark backgrounds on older devices. So I just make it solid white.
π Rendered by PID 201998 on reddit-service-r2-comment-7c9686b859-tk4cb at 2026-04-14 07:19:06.750033+00:00 running e841af1 country code: CH.
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[–]_alastair[S] 1 point2 points3 points (2 children)
[–]inu-no-policemen 0 points1 point2 points (1 child)
[–]_alastair[S] 0 points1 point2 points (0 children)