ConwayLife.com

Here's a free tool: https://golhobby.com/tools/rle2png.htm

Enter an rle in the textarea. Click a button. Get a png file to save.

Why not SVG?

This is a tool primarily designed to make it quick and easy to get the static image for a pattern infobox in the wiki. The wiki likes PNG files.

hotdogPi wrote: December 28th, 2021, 7:50 pmWhy not SVG?

RLE2SVG: https://golhobby.com/

Is there a tool to do this with bigger image sizes? It only goes up to 512x512 and I just want a quick way to convert an RLE into a PNG file.

77551enpassant wrote: March 9th, 2022, 9:26 pm Is there a tool to do this with bigger image sizes? It only goes up to 512x512 and I just want a quick way to convert an RLE into a PNG file.

To be clear, the max. image size is 512x512, not the bounding box.

I didn't want to have larger images to avoid them being uploaded to the wiki.

You might want to try giffer.pay or giffer.lua. They support arbitrarily large gifs(can be stationary, so you can convert them to png)

You can also do similar in LifeViewer: Use Settings->Pattern->Save Image (hotkey O).

Hey Wonderful Persons -

Thank You for all the great

Image Handling Software !

Cheer Up !

Book wrote: December 28th, 2021, 3:12 pm Here's a free tool: https://golhobby.com/tools/rle2png.htm

Enter an rle in the textarea. Click a button. Get a png file to save.

Bullet51 wrote: January 18th, 2023, 11:02 pm The black cells in the Walrus image are misaligned.

This appears to be an issue stemming from RLE2PNG. Each on cell is placed one pixel too high, so it overlaps part of the border while leaving a white line at the bottom of the cell.

Also, the grid lines are slightly darker where the horizontal and vertical lines overlap. This isn't really a problem, but I personally prefer solid-color grid lines.

Sokwe wrote: January 19th, 2023, 4:38 am This appears to be an issue stemming from RLE2PNG. Each on cell is placed one pixel too high, so it overlaps part of the border while leaving a white line at the bottom of the cell.

Should be fixed now. Walrus img has been redone and uploaded.

The question came up on Discord this morning, as to what the best way to produce LifeWiki-compatible images.

On September 7 I tried emailing Book to see if golhobby.com might be coming back online at some point -- but didn't hear anything back.

Someone could certainly go through and rescue the source code from golhobby.com via the Internet Archive -- looks like it's probably all out there -- and get it hosted in some new location. In the absence of that happening, it looks like maybe LifeViewer is currently the best bet for easy standardized PNG generation.


Cliff notes: go to conwaylife.com and click Show Advanced Options, paste in your RLE, click Update LifeViewer, add a line like this
then probably replace the "AUTOFIT" above with an appropriate exact integer zoom , like
Then choose Settings->Pattern->Save Image -- hotkey o (lowercase, not uppercase!).

If you don't like the image dimensions, try using the LifeViewer below to get a square popup window --
-- or to make adjustments to the dimensions, reply to this email (without actually posting anything), change the settings above and hit Preview. 480 is the minimum width for me, but it's possible your mileage may vary -- there are some dependencies on hardware and browser settings, but the details escape me at the moment.

It all adds up to being a little bit awkward, so I hope someone does rescue the golhobby tools at some point!

From LifeViewer build 1205 pressing the ; (semi-colon) key will take a screenshot with the following properties:

• Inverse Theme
• Grid lines on with no major grid lines
• Integer zoom