DRW-Next: Add uniform attributes (object attributes) support

This replaces the direct shader uniform layout declaration by a linear
search through a global buffer.

Each instance has an attribute offset inside the global buffer and an
attribute count.

This removes any padding and tighly pack all uniform attributes inside
a single buffer.

This would also remove the limit of 8 attribute but it is kept because of
compatibility with the old system that is still used by the old draw
manager.

5 files changed, 21 insertions, 0 deletions

diff --git a/source/blender/draw/engines/eevee/shaders/shadow_vert.glsl b/source/blender/draw/engines/eevee/shaders/shadow_vert.glsl
index 57d70334651..062a40f35c2 100644
--- a/source/blender/draw/engines/eevee/shaders/shadow_vert.glsl
+++ b/source/blender/draw/engines/eevee/shaders/shadow_vert.glsl
@@ -152,3 +152,7 @@ vec4 attr_load_color_post(vec4 attr)
 {
   return attr;
 }
+vec4 attr_load_uniform(vec4 attr, const uint attr_hash)
+{
+  return attr;
+}
diff --git a/source/blender/draw/engines/eevee/shaders/surface_frag.glsl b/source/blender/draw/engines/eevee/shaders/surface_frag.glsl
index 2a212b757c2..f84db01de18 100644
--- a/source/blender/draw/engines/eevee/shaders/surface_frag.glsl
+++ b/source/blender/draw/engines/eevee/shaders/surface_frag.glsl
@@ -182,3 +182,7 @@ vec4 attr_load_color_post(vec4 attr)
 {
   return attr;
 }
+vec4 attr_load_uniform(vec4 attr, const uint attr_hash)
+{
+  return attr;
+}
diff --git a/source/blender/draw/engines/eevee/shaders/surface_vert.glsl b/source/blender/draw/engines/eevee/shaders/surface_vert.glsl
index 4a3a91b8534..54aad7891dc 100644
--- a/source/blender/draw/engines/eevee/shaders/surface_vert.glsl
+++ b/source/blender/draw/engines/eevee/shaders/surface_vert.glsl
@@ -165,3 +165,7 @@ vec4 attr_load_color_post(vec4 attr)
 {
   return attr;
 }
+vec4 attr_load_uniform(vec4 attr, const uint attr_hash)
+{
+  return attr;
+}
diff --git a/source/blender/draw/engines/eevee/shaders/volumetric_frag.glsl b/source/blender/draw/engines/eevee/shaders/volumetric_frag.glsl
index c6de723ac25..9ed21fc0bf5 100644
--- a/source/blender/draw/engines/eevee/shaders/volumetric_frag.glsl
+++ b/source/blender/draw/engines/eevee/shaders/volumetric_frag.glsl
@@ -178,3 +178,7 @@ vec4 attr_load_color_post(vec4 attr)
 #endif
   return attr;
 }
+vec4 attr_load_uniform(vec4 attr, const uint attr_hash)
+{
+  return attr;
+}
diff --git a/source/blender/draw/engines/eevee/shaders/volumetric_vert.glsl b/source/blender/draw/engines/eevee/shaders/volumetric_vert.glsl
index b3b9c7af19c..2d51fbd9edc 100644
--- a/source/blender/draw/engines/eevee/shaders/volumetric_vert.glsl
+++ b/source/blender/draw/engines/eevee/shaders/volumetric_vert.glsl
@@ -87,3 +87,8 @@ vec4 attr_load_color_post(vec4 attr)
 {
   return attr;
 }
+
+vec4 attr_load_uniform(vec4 attr, const uint attr_hash)
+{
+  return attr;
+}