Fix SSR not working properly in stereo

[BastiaanOlij]

Fix typo that caused #86987

Bugsquad edit:

• Fixes SSR is broken in stereo rendering #86987

[akien-mga]

Remember to use closing keywords in the OP :)
Fixed it already.

[akien-mga]

There are a lot more cases still using MULTIVIEW, are the rest intended?

$ rg "if.* MULTIVIEW"
servers/rendering/renderer_rd/shaders/effects/copy_to_fb.glsl
7:#ifdef MULTIVIEW
25:#ifdef MULTIVIEW
44:#ifdef MULTIVIEW
65:#ifdef MULTIVIEW
94:#ifdef MULTIVIEW
100:#ifdef MULTIVIEW
111:#endif /* MULTIVIEW */
132:#ifdef MULTIVIEW
168:#ifdef MULTIVIEW
180:#endif /* MULTIVIEW */

servers/rendering/renderer_rd/shaders/effects/tonemap.glsl
7:#ifdef MULTIVIEW
27:#ifdef MULTIVIEW
47:#ifdef MULTIVIEW
128:#ifdef MULTIVIEW
189:#ifdef MULTIVIEW
276:#ifdef MULTIVIEW
367:#ifdef MULTIVIEW
402:#ifdef MULTIVIEW

servers/rendering/renderer_rd/shaders/effects/vrs.glsl
7:#ifdef MULTIVIEW
16:#ifdef MULTIVIEW
26:#ifdef MULTIVIEW
37:#ifdef MULTIVIEW
46:#ifdef MULTIVIEW
52:#endif /* MULTIVIEW */
57:#ifdef MULTIVIEW
63:#ifdef MULTIVIEW
78:#endif /* MULTIVIEW */

servers/rendering/renderer_rd/shaders/effects/specular_merge.glsl
33:#ifdef MULTIVIEW

[clayjohn]

MULTIVIEW

Yep, those all seem to use #define MULTIVIEW

[akien-mga]

Shouldn't we unify those so they all use the same name?

[clayjohn]

Shouldn't we unify those so they all use the same name?

We could, there would be no harm in doing it

[dsnopek]

The compatibility renderer consistently uses USE_MULTIVIEW. It'd be nice to unify all the shader code on the same define.

[BastiaanOlij]

Remember to use closing keywords in the OP :) Fixed it already.

Thanks, I always forget the syntax, so I just add it manually on the right side.

[BastiaanOlij]

And yes, I agree that we should unify these, thats probably how the bug got introduced. But I suggest we do that in a separate PR as a mistake will break stuff.

[akien-mga]

Thanks!

[YuriSizov]

Cherry-picked for 4.2.2.