Workbench Simplification Refactor

This patch is (almost) a complete rewrite of workbench engine.
The features remain unchanged but the code quality is greatly improved.
Hair shading is brighter but also more correct.

This also introduce the concept of `DRWShaderLibrary` to make a simple
include system inside the GLSL files.

Differential Revision: https://developer.blender.org/D7060

1 files changed, 10 insertions, 6 deletions

diff --git a/source/blender/draw/engines/workbench/shaders/workbench_shadow_debug_frag.glsl b/source/blender/draw/engines/workbench/shaders/workbench_shadow_debug_frag.glsl
index 6b0741b6d1b..6fa76510e6e 100644
--- a/source/blender/draw/engines/workbench/shaders/workbench_shadow_debug_frag.glsl
+++ b/source/blender/draw/engines/workbench/shaders/workbench_shadow_debug_frag.glsl
@@ -1,15 +1,19 @@
 
 out vec4 fragColor;
 
+layout(location = 0) out vec4 materialData;
+layout(location = 1) out vec4 normalData;
+layout(location = 2) out uint objectId;
+
 void main()
 {
-  const float intensity = 0.25;
+  const float a = 0.25;
 #ifdef SHADOW_PASS
-  fragColor = vec4(
-      (gl_FrontFacing) ? vec3(intensity, -intensity, 0.0) : vec3(-intensity, intensity, 0.0), 1.0);
+  materialData.rgb = gl_FrontFacing ? vec3(a, -a, 0.0) : vec3(-a, a, 0.0);
 #else
-  fragColor = vec4((gl_FrontFacing) ? vec3(intensity, intensity, -intensity) :
-                                      vec3(-intensity, -intensity, intensity),
-                   1.0);
+  materialData.rgb = gl_FrontFacing ? vec3(a, a, -a) : vec3(-a, -a, a);
 #endif
+  materialData.a = 0.0;
+  normalData = vec4(0.0);
+  objectId = 0u;
 }