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, 6 insertions, 1 deletions

diff --git a/source/blender/draw/engines/eevee/shaders/common_uniforms_lib.glsl b/source/blender/draw/engines/eevee/shaders/common_uniforms_lib.glsl
index 759b4098b37..a6c9eebaff2 100644
--- a/source/blender/draw/engines/eevee/shaders/common_uniforms_lib.glsl
+++ b/source/blender/draw/engines/eevee/shaders/common_uniforms_lib.glsl
@@ -2,7 +2,6 @@
 layout(std140) uniform common_block
 {
   mat4 pastViewProjectionMatrix;
-  vec4 viewVecs[2];
   vec2 mipRatio[10]; /* To correct mip level texel misalignment */
   /* Ambient Occlusion */
   vec4 aoParameters[2];
@@ -70,3 +69,9 @@ layout(std140) uniform common_block
 #define ssrQuality ssrParameters.x
 #define ssrThickness ssrParameters.y
 #define ssrPixelSize ssrParameters.zw
+
+vec2 mip_ratio_interp(float mip)
+{
+  float low_mip = floor(mip);
+  return mix(mipRatio[int(low_mip)], mipRatio[int(low_mip + 1.0)], mip - low_mip);
+}