@mike_acton Am I right in thinking this is running the entire Pico8 program at every pixel and then discarding all but the specific pixel it cares about? This is...

Source

• URL: https://x.com/tom_forsyth/status/1673486875947053056
• Author: Tom Forsyth (TODO: fix my heart or die) (@tom_forsyth)
• Posted: 2023-06-27 00:22:17

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1/ @tom_forsyth

@mike_acton

Am I right in thinking this is running the entire Pico8 program at every pixel and then discarding all but the specific pixel it cares about? This is… so wrong :-)

2/ @mike_acton

@tom_forsyth

Yes and no. It’s doing that for an area that matches the draw area of the pico8 (128x128). Then the actual render view is just a texture lookup. I have a few things I could do to reduce it further, but webgpu doesn’t have this constraint so not bothering.

3/ @tom_forsyth

@mike_acton

I did once contemplate writing a ZX Spectrum emulator like this. It is unclear if there is quite enough horsepower to do this at full speed. Maybe if it transpiled the Z80 code rather than emulating it?

Related

• Spine: 2023-06-26-since-2darray-is-working-on-a-pico8-to-burst-lua