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, 12 insertions, 24 deletions

diff --git a/source/blender/draw/engines/eevee/shaders/shadow_vert.glsl b/source/blender/draw/engines/eevee/shaders/shadow_vert.glsl
index c42f905cf7e..0e342938396 100644
--- a/source/blender/draw/engines/eevee/shaders/shadow_vert.glsl
+++ b/source/blender/draw/engines/eevee/shaders/shadow_vert.glsl
@@ -1,39 +1,23 @@
 
+#pragma BLENDER_REQUIRE(common_view_lib.glsl)
+#pragma BLENDER_REQUIRE(common_hair_lib.glsl)
+#pragma BLENDER_REQUIRE(surface_lib.glsl)
+
 in vec3 pos;
 in vec3 nor;
 
-#ifdef MESH_SHADER
-out vec3 worldPosition;
-out vec3 viewPosition;
-out vec3 worldNormal;
-out vec3 viewNormal;
-#endif
-
-#ifdef HAIR_SHADER
-out vec3 hairTangent;
-out float hairThickTime;
-out float hairThickness;
-out float hairTime;
-flat out int hairStrandID;
-#endif
-
 void main()
 {
-#ifdef GPU_INTEL
-  /* Due to some shader compiler bug, we somewhat
-   * need to access gl_VertexID to make it work. even
-   * if it's actually dead code. */
-  gl_Position.x = float(gl_VertexID);
-#endif
+  GPU_INTEL_VERTEX_SHADER_WORKAROUND
 
 #ifdef HAIR_SHADER
   hairStrandID = hair_get_strand_id();
-  vec3 world_pos, binor;
+  vec3 pos, binor;
   hair_get_pos_tan_binor_time((ProjectionMatrix[3][3] == 0.0),
                               ModelMatrixInverse,
                               ViewMatrixInverse[3].xyz,
                               ViewMatrixInverse[2].xyz,
-                              world_pos,
+                              pos,
                               hairTangent,
                               binor,
                               hairTime,
@@ -41,6 +25,7 @@ void main()
                               hairThickTime);
 
   worldNormal = cross(hairTangent, binor);
+  vec3 world_pos = pos;
 #else
   vec3 world_pos = point_object_to_world(pos);
 #endif
@@ -57,7 +42,10 @@ void main()
   /* No need to normalize since this is just a rotation. */
   viewNormal = normal_world_to_view(worldNormal);
 #  ifdef USE_ATTR
-  pass_attr(pos);
+#    ifdef HAIR_SHADER
+  pos = hair_get_strand_pos();
+#    endif
+  pass_attr(pos, NormalMatrix, ModelMatrixInverse);
 #  endif
 #endif
 }