Fix SHADOWS_DISABLED flag in GLES2

[SouzaGuilherme]

Closes #27061

[clayjohn]

You will need to add this in a few other places as well. Just search through the file for USE_SHADOW. The shadow code for the different types of lights are all in different sections. So you need to make sure shadows get disabled for all of them. Currently, this is just disabling shadows for directional lights, shadows for omni lights and spotlights still need to be disabled.

[qarmin]

Shouldn't you use

#ifndef SHADOWS_DISABLED

instead

#if !defined(SHADOWS_DISABLED)

?

[clayjohn]

@qarmin Usually it is ifndef when there is one item and then !defined() when there is mulitple, however GLES3 uses !defined(SHADOWS_DISABLED) everytime.

godot/drivers/gles3/shaders/scene.glsl

Line 1261 in df18c8c

#if !defined(SHADOWS_DISABLED)

godot/drivers/gles3/shaders/scene.glsl

Line 1323 in df18c8c

#if !defined(SHADOWS_DISABLED)

godot/drivers/gles3/shaders/scene.glsl

Line 1822 in df18c8c

#if !defined(SHADOWS_DISABLED)

In this case it is likely best to combine it with the USE_SHADOW define. as #if defined(USE_SHADOW) && !defined(SHADOWS_DISABLED)

[akien-mga]

Thanks!

[akien-mga]

Cherry-picked for 3.1.2.