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Is there any Atari 7800 Graphics tool out there?

Atari7800 Graphics

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#1 R_Leo_1 OFFLINE  

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Posted Tue Oct 23, 2018 11:16 AM

I'm a pixel artist and would love to get into making pixel art for the Atari 7800. I have found utilities available for making graphics on the 2600 and the Atari 8-bit computers, but I can't seem to find one out there for the 7800. I've read some on the Atari 7800 Programming site and forum posts here explaining how the 7800 and its MARIA chip handles graphics, and I do have some understanding to an extent, but a specified program would definitely make the process a ton easier. If there isn't some kind of program available, I can definitely try to just replicate the limitations myself in some kind of paint program or other software that wasn't specifically for the Atari 7800. If anyone knows of a pixel art tool that allows for non-square pixels, like those on the 7800, that would be very helpful as well. Thanks :)



#2 Eagle OFFLINE  

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Posted Tue Oct 23, 2018 1:03 PM

Graf2x

http://grafx2.chez.c...atic3/downloads

Aseprite

https://www.aseprite.org/


Edited by Eagle, Tue Oct 23, 2018 1:03 PM.


#3 R_Leo_1 OFFLINE  

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Posted Tue Oct 23, 2018 3:22 PM

Awesome! Thanks for these tools! Do either of them have options for rectangular pixels?

 

Nevermind I was able to figure it out rather quickly!


Edited by R_Leo_1, Tue Oct 23, 2018 3:33 PM.


#4 SmittyB ONLINE  

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Posted Tue Oct 23, 2018 3:37 PM

If all else fails you can just draw pairs of pixels and then resize the results.
I know Photoshop supports different pixel ratios but it's hardly worth the price tag just for drawing 7800 graphics.

#5 RevEng OFFLINE  

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Posted Tue Oct 23, 2018 3:45 PM

FWIW The Gimp supports different pixel aspect ratios too.

#6 R_Leo_1 OFFLINE  

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Posted Tue Oct 23, 2018 4:18 PM

I actually have gimp so that sounds like a pretty good! I'm having a hard time with grafx2 so I may just try that idea.



#7 Lavalamp OFFLINE  

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Posted Tue Oct 23, 2018 4:27 PM

GIMP has a terrible interface, but I guess its the only real option, I didnt know about the pixel ratio option though thats great.



#8 R_Leo_1 OFFLINE  

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Posted Tue Oct 23, 2018 4:41 PM

GIMP has a terrible interface, but I guess its the only real option, I didnt know about the pixel ratio option though thats great.

 

I agree with you about the interface for sure, I've just had to learn to adjust or swap the image between programs and only really using GIMP when I absolutely need to.



#9 Lavalamp OFFLINE  

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Posted Tue Oct 23, 2018 4:59 PM

 

I agree with you about the interface for sure, I've just had to learn to adjust or swap the image between programs and only really using GIMP when I absolutely need to.

 

It does work tho...

 

 

Aspect.PNG



#10 R_Leo_1 OFFLINE  

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Posted Tue Oct 23, 2018 5:15 PM

I realized I can do the same on Paint.net, which I'm more familiar with. I just wish there was a way to check that my final image wouldn't be too much for MARIA to display on screen.



#11 Lavalamp OFFLINE  

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Posted Tue Oct 23, 2018 5:42 PM

I think my ratio is the wrong way round...I prefer paint.net too. But it has no way to limit the palette that I could see, so you will still need to convert it in GIMP.


Edited by Lavalamp, Tue Oct 23, 2018 5:44 PM.


#12 R_Leo_1 OFFLINE  

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Posted Tue Oct 23, 2018 6:15 PM

Yeah the indexed color is a great tool in GIMP. Do you know if there's any way to display a pre-made image on screen using 7800 BASIC?



#13 Lavalamp OFFLINE  

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Posted Wed Oct 24, 2018 12:57 PM



Yeah the indexed color is a great tool in GIMP. Do you know if there's any way to display a pre-made image on screen using 7800 BASIC?

 

 

if you use a 128 x 96 image based on 4 index colours from the Atari 256 palette you can use incbanner filename.png [graphics mode] [color #0] [#1]  ...

 

Atarius Maximus excellent guide is pretty through here.

 

 

This is my summarised version for GIMP 2:

 

Below is my template (could be resized to 16x16 for sprites) with the correct ratio in place for 160B with doublewide on for sprites:

 

template.png

 

Toggling Dot for Dot under View shows you the stretched image. I created a new view in GIMP so I could see them side by side.

 

dot.PNG

 

1. Use Mode to switch between RGB and Index

 

MODE.PNG

 

2. First to restrict the number of colours to 4. (160A Mode)

 

4 Colours.PNG

 

3. Use mode RGB/Indexed again to restrict to the Atari Palette. (You can import this into GIMP as a ACT file from here

 

Atari Palette.PNG

 

4. I switch to RGB to select which colours I want from the Atari palette then switch back to the indexed mode.


Edited by Lavalamp, Thu Oct 25, 2018 12:29 PM.


#14 R_Leo_1 OFFLINE  

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Posted Fri Oct 26, 2018 8:42 AM

Oh wow! This is super helpful, thanks for the info! I may just have to start using GIMP a bit more often now :)



#15 ColonialWarrior OFFLINE  

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Posted Sun Jan 20, 2019 5:41 PM

GIMP!!!





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