diff options
| author | Jason Ekstrand <[email protected]> | 2015-08-31 17:16:01 -0700 |
|---|---|---|
| committer | Jason Ekstrand <[email protected]> | 2015-08-31 17:16:49 -0700 |
| commit | 86c3476668775513a720f116bffb619e98ecfe6d (patch) | |
| tree | 2e44afe9abbdccefd175d5c74f1331e56df5315a | |
| parent | 6350c97412d993de1ae876312bab9689a7f34839 (diff) | |
nir/spirv: Use VERTEX_ID_ZERO_BASE for VertexId
In Vulkan, VertexId and InstanceId will be zero-based and new intrinsics,
VertexIndex and InstanceIndex, will be added for non-zer-based. See also,
Khronos bug #14255
| -rw-r--r-- | src/glsl/nir/spirv_to_nir.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/glsl/nir/spirv_to_nir.c b/src/glsl/nir/spirv_to_nir.c index c3a16986fc1..27a864f5993 100644 --- a/src/glsl/nir/spirv_to_nir.c +++ b/src/glsl/nir/spirv_to_nir.c @@ -644,7 +644,10 @@ vtn_get_builtin_location(SpvBuiltIn builtin, int *location, /* XXX figure this out */ unreachable("unhandled builtin"); case SpvBuiltInVertexId: - *location = SYSTEM_VALUE_VERTEX_ID; + /* Vulkan defines VertexID to be zero-based and reserves the new + * builtin keyword VertexIndex to indicate the non-zero-based value. + */ + *location = SYSTEM_VALUE_VERTEX_ID_ZERO_BASE; *mode = nir_var_system_value; break; case SpvBuiltInInstanceId: |