[rtextures] Add texture scale to DrawTextureNPatch()

[michelelorusso05]

Please, before submitting a new issue verify and check:

• I tested it on latest raylib version from master branch
• I checked there is no similar issue already reported
• I checked the documentation on the wiki
• My code has no errors or misuse of raylib

It would be nice, if possible, to have a scale parameter on DrawTextureNPatch, like we have on DrawTextureEx. The scaling would be applied before the N-Patch slicing.

Scale = 1 (default):

Scale = 2:

And so on.

[michelelorusso05]

I quickly put together a DrawTextureNPatchEx with this functionality implemented, going to send a pull request shortly

[raysan5]

@michelelorusso05 Afair, the requested functionality requires GL_REPEAT for textures repeat but unfortunately it is not supported on all raylib platform (OpenGL ES 2.0 / WebGL could not support it).

Also note that NPatch drawing is probably moved to a separate example in the future, instead of being in the core raylib library. It seems to belong to a higher-level engine.

[michelelorusso05]

@michelelorusso05 Afair, the requested functionality requires GL_REPEAT for textures repeat but unfortunately it is not supported on all raylib platform (OpenGL ES 2.0 / WebGL could not support it).

That's a shame, I saw the other issue about nine patch repeat not being possible; however, this would be just a quick addition for patch texture scaling, as showed here:

ezgif-489f2d58f677fd.mp4

[raysan5]

@michelelorusso05 Still, it can be added to current N-Patch example for reference to other users.

[michelelorusso05]

The only way to do it with the current library would be to create a new scaled texture everytime the scale needs to be updated (correct me if I'm mistaken); I understand that this would still be a very niche use case though, so that's okay if you think that this is not worth the pull request