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, 23 insertions, 15 deletions

diff --git a/source/blender/draw/engines/eevee/shaders/effect_gtao_frag.glsl b/source/blender/draw/engines/eevee/shaders/effect_gtao_frag.glsl
index eea0ce0aae2..47fe21928b3 100644
--- a/source/blender/draw/engines/eevee/shaders/effect_gtao_frag.glsl
+++ b/source/blender/draw/engines/eevee/shaders/effect_gtao_frag.glsl
@@ -1,14 +1,34 @@
+
+#pragma BLENDER_REQUIRE(common_view_lib.glsl)
+#pragma BLENDER_REQUIRE(common_math_lib.glsl)
+#pragma BLENDER_REQUIRE(common_math_geom_lib.glsl)
+#pragma BLENDER_REQUIRE(common_utiltex_lib.glsl)
+#pragma BLENDER_REQUIRE(ambient_occlusion_lib.glsl)
+
 /**
  * This shader only compute maximum horizon angles for each directions.
  * The final integration is done at the resolve stage with the shading normal.
  */
 
-uniform float rotationOffset;
-
 out vec4 FragColor;
 
-#ifdef DEBUG_AO
 uniform sampler2D normalBuffer;
+#ifdef LAYERED_DEPTH
+uniform sampler2DArray depthBufferLayered;
+uniform int layer;
+#  define gtao_depthBuffer depthBufferLayered
+#  define gtao_textureLod(a, b, c) textureLod(a, vec3(b, layer), c)
+
+#else
+uniform sampler2D depthBuffer;
+#  define gtao_depthBuffer depthBuffer
+#  define gtao_textureLod(a, b, c) textureLod(a, b, c)
+
+#endif
+
+uniform float rotationOffset;
+
+#ifdef DEBUG_AO
 
 void main()
 {
@@ -34,18 +54,6 @@ void main()
 
 #else
 
-#  ifdef LAYERED_DEPTH
-uniform sampler2DArray depthBufferLayered;
-uniform int layer;
-#    define gtao_depthBuffer depthBufferLayered
-#    define gtao_textureLod(a, b, c) textureLod(a, vec3(b, layer), c)
-
-#  else
-#    define gtao_depthBuffer depthBuffer
-#    define gtao_textureLod(a, b, c) textureLod(a, b, c)
-
-#  endif
-
 void main()
 {
   vec2 uvs = saturate(gl_FragCoord.xy / vec2(textureSize(gtao_depthBuffer, 0).xy));