Materials: support true float4 attributes in the Attribute node.

Add a new Alpha socket to the Attribute node that outputs the
fourth component of the attribute. Currently the only such
attribute is vertex color, but there may be more in the future.
If the attribute has no alpha channel, the expected value is 1.

The Cycles code is already refactored and committed by Brecht.

Ref D2057

1 files changed, 1 insertions, 1 deletions

diff --git a/source/blender/gpu/intern/gpu_codegen.c b/source/blender/gpu/intern/gpu_codegen.c
index 2d76e793fc0..39c3119cc39 100644
--- a/source/blender/gpu/intern/gpu_codegen.c
+++ b/source/blender/gpu/intern/gpu_codegen.c
@@ -478,7 +478,7 @@ static void codegen_call_functions(DynStr *ds, GPUNodeGraph *graph, GPUOutput *f
         BLI_dynstr_appendf(ds, "cons%d", input->id);
       }
       else if (input->source == GPU_SOURCE_ATTR) {
-        BLI_dynstr_appendf(ds, "var%d", input->attr->id);
+        codegen_convert_datatype(ds, input->attr->gputype, input->type, "var", input->attr->id);
       }
 
       BLI_dynstr_append(ds, ", ");