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Cart #sejiyudiyu-0 | 2020-01-31 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

Interesting. Apparently if you import a P8 cart as a .PNG for Lex it accepts 24-bit information.

PROOF: This cart.

And yes at least the way I see it you must unpack the actual cart data in the PNG to a separate array, erase the cart data from the PNG, insert the new 24-bit picture, then insert the cart data array back into the PNG picture. I wrote a tool in blitzmax to do this now.

[1] Input P8.PNG
[2] Input 128x128 24/32-bit PNG picture.

Output, P8.PNG with 24-bit image for cover art. I wonder what it looks like in SPLORE however.

P#72489 2020-01-31 04:04 ( Edited 2020-01-31 19:48)

Shows up in the BBS fine. Splore has strange ideas about what's green in the image. Neat!

P#72495 2020-01-31 06:58

Thanks, Munro. If there's a need for it I could put together a little tool engine in Blitz proper to do this with fileboxes and user input.

Trying SPLORE. Yep, doesn't appear properly in there. Well heck that just ruins the effect.

Hey @zep! How about it ? Can you set it so you have an option of showing and running a cart in #SPLORE that maintains the bit-rate of the 160x205 PNG =AND= has an option that if you run it, it shows the full 160x205 without tinting, then hit a key to continue.

And yes, it doesn't have to be just the 160x205 cart image but any image that is precisely 160x205. Hmm ... Thinking ...

P#72516 2020-01-31 16:45 ( Edited 2020-01-31 16:48)

I think this is illegal!

P#72538 2020-01-31 21:44

I wrote the converter, I wrote the cart demonstrated here, I purchased Pico-8 to write the cart. How is this illegal, @gate88 ?

P#72539 2020-01-31 21:51 ( Edited 2020-01-31 22:02)

Allowing high bit depth carts would not really preserve the illusion that splore is running on Pico-8 hardware.

P#72544 2020-01-31 22:05

I love it when I see new things, @apLundell. I first saw it HERE:


Got me curious as to how it was done as this was the first time I had seen it. So I started playing around in code for about an hour or so to figure it out. Then I solved how it was done and wrote a tool to do it.

INPUT #1: cart.p8.png
INPUT #2: 24-bit.png

OUTPUT: cart.p8.png

No worries though. I'm not keeping the method except for this cart. I think it looks rather nice here.

It's no different than me discovering a year or so back you could load and save 12288 external bytes of data per cart when 256-bytes was considered the maximum. Or that you could write self-modifying code even though you can't POKE to your source. I love these neat little things I can find out through my exploration in Pico. :)

Likely future Pico-8 won't allow for this 24-bit method of cart snapshot so for now it's a flash-in-the-pan effect. Good, but until it appears also as 24-bit in SPLORE, it's not very functional.

P#72545 2020-01-31 22:27 ( Edited 2020-02-01 17:57)

I seem to recall prior art in this regard...

Like Gamax92's Air Raiders, I thought.
gamax's 24-bit cart

But that only appears to use 24-bit in the title (if at all?)
Hmm. Maybe my memory's shot :>

Anyway, this is definitely very cool, even if a little "wrong"

P#75621 2020-04-30 06:07

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