diff options
| -rw-r--r-- | src/vulkan/gen8_pipeline.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/src/vulkan/gen8_pipeline.c b/src/vulkan/gen8_pipeline.c index e6cb145d522..dee3c4049c2 100644 --- a/src/vulkan/gen8_pipeline.c +++ b/src/vulkan/gen8_pipeline.c @@ -495,16 +495,30 @@ genX(graphics_pipeline_create)( if (input_index < 0) continue; - /* We have to subtract two slots to accout for the URB entry output - * read offset in the VS and GS stages. - */ - int source_attr = fs_input_map->varying_to_slot[attr] - 2; + int source_attr = fs_input_map->varying_to_slot[attr]; max_source_attr = MAX2(max_source_attr, source_attr); if (input_index >= 16) continue; - swiz.Attribute[input_index].SourceAttribute = source_attr; + if (source_attr == -1) { + /* This attribute does not exist in the VUE--that means that the + * vertex shader did not write to it. It could be that it's a + * regular varying read by the fragment shader but not written by the + * vertex shader or it's gl_PrimitiveID. In the first case the value + * is undefined, in the second it needs to be gl_PrimitiveID. + */ + swiz.Attribute[input_index].ConstantSource = PRIM_ID; + swiz.Attribute[input_index].ComponentOverrideX = true; + swiz.Attribute[input_index].ComponentOverrideY = true; + swiz.Attribute[input_index].ComponentOverrideZ = true; + swiz.Attribute[input_index].ComponentOverrideW = true; + } else { + /* We have to subtract two slots to accout for the URB entry output + * read offset in the VS and GS stages. + */ + swiz.Attribute[input_index].SourceAttribute = source_attr - 2; + } } anv_batch_emit(&pipeline->batch, GENX(3DSTATE_SBE), |