EEVEE: GLSL refactor/cleanup

- add the use of DRWShaderLibrary to EEVEE's glsl codebase to reduce code
complexity and duplication.
- split bsdf_common_lib.glsl into multiple sub library which are now shared
with other engines.
- the surface shader code is now more organised and have its own files.
- change default world to use a material nodetree and make lookdev shader
more clear.

Reviewed By: jbakker

Differential Revision: https://developer.blender.org/D8306

1 files changed, 4 insertions, 0 deletions

diff --git a/source/blender/draw/engines/eevee/shaders/volumetric_integration_frag.glsl b/source/blender/draw/engines/eevee/shaders/volumetric_integration_frag.glsl
index c3c442e7b69..f4276bd61bd 100644
--- a/source/blender/draw/engines/eevee/shaders/volumetric_integration_frag.glsl
+++ b/source/blender/draw/engines/eevee/shaders/volumetric_integration_frag.glsl
@@ -1,4 +1,6 @@
 
+#pragma BLENDER_REQUIRE(volumetric_lib.glsl)
+
 /* Based on Frosbite Unified Volumetric.
  * https://www.ea.com/frostbite/news/physically-based-unified-volumetric-rendering-in-frostbite */
 
@@ -11,9 +13,11 @@ uniform sampler3D volumeExtinction;
 #ifdef USE_VOLUME_OPTI
 uniform layout(binding = 0, r11f_g11f_b10f) writeonly restrict image3D finalScattering_img;
 uniform layout(binding = 1, r11f_g11f_b10f) writeonly restrict image3D finalTransmittance_img;
+
 vec3 finalScattering;
 vec3 finalTransmittance;
 #else
+
 flat in int slice;
 
 layout(location = 0) out vec3 finalScattering;