Fix sprite crunch at half-pixels

[adamscott]

Rounds the canvas item position for nearest filtered textures before rendering it.

Fixes #84632

[Calinou]

Out of curiosity, why is this only done when the filter mode is Linear and not Nearest?

[adamscott]

Out of curiosity, why is this only done when the filter mode is Linear and not Nearest?

My bad, I just found out that I mixed up Linear and Nearest. I meant to do this on Nearest only.

Nearest:
Capture vidéo du 2024-01-04 13-54-09.webm

Linear (I don't want to round up, because it will look like nearest if I round up (without the pixelated inbetweens):
Capture vidéo du 2024-01-04 13-54-35.webm

[clayjohn]

I think this should be tucked behind a check for rendering/2d/snap/snap_2d_transforms_to_pixel.

For performance reasons we should cache the result of course and add a method to enable pixel snapping inside the rendering server.

[adamscott]

#84380 is better suited to fix #84632.