From 96d96e8909207c6e152e7fff4dcf3e0f2ef4a6d6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Foucault?= <foucault.clem@gmail.com>
Date: Mon, 25 Jul 2022 09:44:15 +0200
Subject: EEVEE-Next: Fix some Material compilation errors

---
 .../eevee_next/shaders/eevee_attributes_lib.glsl   | 42 +--------------------
 .../eevee_next/shaders/eevee_nodetree_lib.glsl     | 44 ++++++++++++++++++++++
 .../eevee_next/shaders/eevee_surf_depth_frag.glsl  | 12 ++++++
 3 files changed, 58 insertions(+), 40 deletions(-)

diff --git a/source/blender/draw/engines/eevee_next/shaders/eevee_attributes_lib.glsl b/source/blender/draw/engines/eevee_next/shaders/eevee_attributes_lib.glsl
index 326481a1db6..974581e674e 100644
--- a/source/blender/draw/engines/eevee_next/shaders/eevee_attributes_lib.glsl
+++ b/source/blender/draw/engines/eevee_next/shaders/eevee_attributes_lib.glsl
@@ -3,6 +3,8 @@
 #pragma BLENDER_REQUIRE(common_math_lib.glsl)
 #pragma BLENDER_REQUIRE(gpu_shader_codegen_lib.glsl)
 
+#defined EEVEE_ATTRIBUTE_LIB
+
 #if defined(MAT_GEOM_MESH)
 
 /* -------------------------------------------------------------------- */
@@ -282,43 +284,3 @@ vec3 attr_load_uv(vec3 attr)
 /** \} */
 
 #endif
-
-/* -------------------------------------------------------------------- */
-/** \name Volume Attribute post
- *
- * TODO(@fclem): These implementation details should concern the DRWManager and not be a fix on
- * the engine side. But as of now, the engines are responsible for loading the attributes.
- *
- * \{ */
-
-#if defined(MAT_GEOM_VOLUME)
-
-float attr_load_temperature_post(float attr)
-{
-  /* Bring the into standard range without having to modify the grid values */
-  attr = (attr > 0.01) ? (attr * drw_volume.temperature_mul + drw_volume.temperature_bias) : 0.0;
-  return attr;
-}
-vec4 attr_load_color_post(vec4 attr)
-{
-  /* Density is premultiplied for interpolation, divide it out here. */
-  attr.rgb *= safe_rcp(attr.a);
-  attr.rgb *= drw_volume.color_mul.rgb;
-  attr.a = 1.0;
-  return attr;
-}
-
-#else /* Noop for any other surface. */
-
-float attr_load_temperature_post(float attr)
-{
-  return attr;
-}
-vec4 attr_load_color_post(vec4 attr)
-{
-  return attr;
-}
-
-#endif
-
-/** \} */
diff --git a/source/blender/draw/engines/eevee_next/shaders/eevee_nodetree_lib.glsl b/source/blender/draw/engines/eevee_next/shaders/eevee_nodetree_lib.glsl
index 71921d0477a..c488216eeac 100644
--- a/source/blender/draw/engines/eevee_next/shaders/eevee_nodetree_lib.glsl
+++ b/source/blender/draw/engines/eevee_next/shaders/eevee_nodetree_lib.glsl
@@ -269,6 +269,10 @@ void output_aov(vec4 color, float value, uint hash)
 #  define nodetree_thickness() 0.1
 #endif
 
+#ifdef GPU_VERTEX_SHADER
+#  define closure_to_rgba(a) vec4(0.0)
+#endif
+
 /* -------------------------------------------------------------------- */
 /** \name Fragment Displacement
  *
@@ -373,3 +377,43 @@ vec3 coordinate_incoming(vec3 P)
 }
 
 /** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name Volume Attribute post
+ *
+ * TODO(@fclem): These implementation details should concern the DRWManager and not be a fix on
+ * the engine side. But as of now, the engines are responsible for loading the attributes.
+ *
+ * \{ */
+
+#if defined(MAT_GEOM_VOLUME)
+
+float attr_load_temperature_post(float attr)
+{
+  /* Bring the into standard range without having to modify the grid values */
+  attr = (attr > 0.01) ? (attr * drw_volume.temperature_mul + drw_volume.temperature_bias) : 0.0;
+  return attr;
+}
+vec4 attr_load_color_post(vec4 attr)
+{
+  /* Density is premultiplied for interpolation, divide it out here. */
+  attr.rgb *= safe_rcp(attr.a);
+  attr.rgb *= drw_volume.color_mul.rgb;
+  attr.a = 1.0;
+  return attr;
+}
+
+#else /* Noop for any other surface. */
+
+float attr_load_temperature_post(float attr)
+{
+  return attr;
+}
+vec4 attr_load_color_post(vec4 attr)
+{
+  return attr;
+}
+
+#endif
+
+/** \} */
diff --git a/source/blender/draw/engines/eevee_next/shaders/eevee_surf_depth_frag.glsl b/source/blender/draw/engines/eevee_next/shaders/eevee_surf_depth_frag.glsl
index f19b6038a6a..34ea288852a 100644
--- a/source/blender/draw/engines/eevee_next/shaders/eevee_surf_depth_frag.glsl
+++ b/source/blender/draw/engines/eevee_next/shaders/eevee_surf_depth_frag.glsl
@@ -10,6 +10,18 @@
 #pragma BLENDER_REQUIRE(eevee_surf_lib.glsl)
 #pragma BLENDER_REQUIRE(eevee_velocity_lib.glsl)
 
+vec4 closure_to_rgba(Closure cl)
+{
+  vec4 out_color;
+  out_color.rgb = g_emission;
+  out_color.a = saturate(1.0 - avg(g_transmittance));
+
+  /* Reset for the next closure tree. */
+  closure_weights_reset();
+
+  return out_color;
+}
+
 /* From the paper "Hashed Alpha Testing" by Chris Wyman and Morgan McGuire. */
 float hash(vec2 a)
 {
-- 
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