Preserve exact colors sequence in screenshots

[KONEY]

Hey all,


I've been checking both WinUAE config and forum posts but seems like this never came out before.


Is there a way to take a screenshot which preserve both colors values and their position on registers? In resulting PNG colors are quite the same as long as there are no duplicates, otherwise they somehow group up and when the file is loaded in PersonaPaint they're are messed up and don't match the original palette. Also pixels of the same color are mapped the same.


Thanks for any help!

[fxgogo]

I may be wrong here, but I think the screenshot is taking a 24bit colour snap of the output so the original indexed colour palette of your image is not there.

[Toni Wilen]

Original palette information is lost (and there is no point in tracking it) quite soon in emulation pipeline because palette color can change at any point and HAM and other special cases exist.

[musashi5150]

Originally Posted by KONEY

Is there a way to take a screenshot which preserve both colors values and their position on registers?

I guess you could use a freezer (like ActionReplay) on the emulated Amiga and save an IFF out from that. Wouldn't help with copper backgrounds or screen splits etc, but it should work at least sometimes

[alexh]

For screens that do not alter the palette while the image is being displayed

Take a screenshot in WinUAE
Use a paint tool to convert to a format which uses a 16 or 32-entry CLUT (no colour conversion should take place because the screen grab will only be 16 or 32 colours)
Sort the palette

Does that not give you what you're after?

Originally Posted by musashi5150

I guess you could use a freezer (like ActionReplay) on the emulated Amiga and save an IFF out from that. Wouldn't help with copper backgrounds or screen splits etc, but it should work at least sometimes

Even better idea.

[Rock'n Roll]

you can use maptapper to extract graphics and save it as *.png
https://codetapper.com/amiga/maptapp...fx/gfx-palette

[Ami]

Originally Posted by alexh

Sort the palette

By which program?

[KONEY]

Originally Posted by musashi5150

I guess you could use a freezer (like ActionReplay)

This could work!!

[fxgogo]

Can you describe what you are attempting to do? Maybe there is a solution once we know what you want to capture.

[KONEY]

Sure, I'm coding an intro with a lot of color updates sometimes by changing values on registers and sometimes by changing order or position of bitmap pointers. There are dozens of adjustments to do on palette in specific parts and figure out what to change it's quite a challenge. Best way would be to take a screenshot on UAE, open it up in Personal Paint on real hardware with CRT, fix colors, export palette via ARexx and put values back into code. But colors and positions need to match.

[Toni Wilen]

This would be possible with some limitations. Before saving screenshot, check number of unique colors, if it is less than 256, generate palette based png, map colors to current custom chipset palette colors and move them to matching positions in png palette.

Limitations:
- if chipset register color is not in used anywhere in input image: index can be used with some other color (which makes "wrong" final palette) or it can be left unused (but in that case number of unique colors increases by one. if there are many unused colors: total count might go above 256 in worst case)
- if palette has two or more identical colors: it is impossible to match which image color uses which palette entry.
- if image changes colors mid screen: result can be unexpected.
- this probably won't work very well with AGA unless part of palette has identical colors and/or unused (256 color palette limit). Also AGA has annoying "bug", if both upper and lower half of color entry is changed and color is also visible in exact same position, wrong color gets drawn until other part of palette value is also updated. (easiest to see when changing border color)

[KONEY]

Originally Posted by Rock'n Roll

you can use maptapper to extract graphics and save it as *.png
https://codetapper.com/amiga/maptapp...fx/gfx-palette

Thanks, this one has been the best solution so far!



There can be no duplicate color and I can use maptapper to export the exact palette in IFF. load it in Personal Paint and fire COLOR>REMAP function to end up with everything matching.