Giant screenshot keying

[Belzebub]

Hi!

Maybe you know the giant aerials at New Element.
We used to stitch those together hand by hand with photoshop, so it's AWESOME to see a giant screenshot function - thanks a lot!
However we used an altered version of the G1.DAT so that the background is pink to key out the background more efficiently (because otherwise pixels on the map get marked as well). Would it be possible to change the standard rct grey/black-background to pink/something user defined or even save the giant screenshot image transparent already?

[duncanspumpkin]

I actually came across the code to do this today. Can probably get a solution for it tomorrow.

[Gymnasiast]

Since the screenshot format is PNG by default, saving it with transparency directly might indeed be possible. That would save you the extra step of taking out the pink.

[duncanspumpkin]

Hmm that might not be too easy. I know the sprite it assigns for drawing the background. My plan was to just upload a g2 version in pink and then link to that when in giant screenshot. It would be a bit harder to change the whole drawing code to also create a transparency mask.

[Gymnasiast]

Ah, I didn't know that (which is why I said 'might'). In that case pink will do, I think. :)

[duncanspumpkin]

Doh just realised this wont work at present. Some old code still accesses g1 so this will fail. I have to implement that first but its going to take a couple weeks to get the code ready for it.

[zsilencer]

just have to set height of the background element to 0 so it doesn't draw, and memset the screenshot buffer to 0 before drawing and make that the transparency key.
http://i.imgur.com/89SBJ8T.png

[duncanspumpkin]

@zsilencer ahh that does sound like a better approach.

[zsilencer]

so i put it in a branch
however, there is still the matter of some maps having custom scenery that looks like the background, giving the effect that the map is shaped.
a solution is needed for that

[Belzebub]

^We changed the black tiles with custom pink tiles and manually colored over the custom scenery like that. Not the fastest solution but it worked kinda well.

[zsilencer]

ok if you are able to change the black tiles with custom tiles that are colored with palette index 0 instead of pink, then the giant screenshot should make it transparent for you. if you could test out my branch and see?

[Belzebub]

How can I test out your branch?

[zsilencer]

here is the built dll, just replace the existing one
http://wikisend.com/download/310948/openrct2.dll.zip

[Belzebub]

tried it replacing the dll (it's in the same folder as openrct2.exe, right?), but it didn't do anything different to the original one? No keying or transparency whatsoever.

[zsilencer]

are you building the game? if so need to replace the dll in the build folder.

[Belzebub]

^Nope, I'm just a 'user' :)

[Nubbie]

Wonder if the feature should be a option

[Richard-L]

Can I comment to revisit and ask if enabling transparency for RCT2 background in giant screenshots is at all possible?

[Gymnasiast]

It's very likely to be possible, it's just that this is one request in the big pile of feature requests and bugs to address.

[Umdlye]

Implemented by #9334