diff options
| author | Ian Romanick <[email protected]> | 2014-06-19 12:06:42 -0700 |
|---|---|---|
| committer | Kenneth Graunke <[email protected]> | 2014-09-10 11:05:08 -0700 |
| commit | ec08b5e768271aa100be87c1ca6dd2b0109049d9 (patch) | |
| tree | b76c8e82a5c3fe2cc5180586b815a3bbcd218b18 /src/glsl/linker.cpp | |
| parent | 04d3323d4b7b7cae4954d80946f0ca202770dd14 (diff) | |
glsl: Add a lowering pass for gl_VertexID
Converts gl_VertexID to (gl_VertexIDMESA + gl_BaseVertex). gl_VertexIDMESA
is backed by SYSTEM_VALUE_VERTEX_ID_ZERO_BASE, and gl_BaseVertex is backed
by SYSTEM_VALUE_BASE_VERTEX.
v2: Put the enum in struct gl_constants and propoerly resolve the scope
in C++ code. Fix suggested by Marek.
v3: Reabase on Matt's foreach_in_list changes (was using foreach_list).
v4 (Ken): Use a systemvalue instead of a uniform because
STATE_BASE_VERTEX has been removed.
v5: Use a boolean to select lowering, and only allow one lowering
method. Suggested by Ken.
v6 (Ken): Replace strcmp against literal "gl_BaseVertex"/"gl_VertexID"
with SYSTEM_VALUE enum checks, for efficiency.
v7: Rebase on context constant initialization work.
Signed-off-by: Ian Romanick <[email protected]>
Signed-off-by: Kenneth Graunke <[email protected]>
Diffstat (limited to 'src/glsl/linker.cpp')
| -rw-r--r-- | src/glsl/linker.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/glsl/linker.cpp b/src/glsl/linker.cpp index bdd81c79065..97d29e257c1 100644 --- a/src/glsl/linker.cpp +++ b/src/glsl/linker.cpp @@ -1737,6 +1737,9 @@ link_intrastage_shaders(void *mem_ctx, } } + if (ctx->Const.VertexID_is_zero_based) + lower_vertex_id(linked); + /* Make a pass over all variable declarations to ensure that arrays with * unspecified sizes have a size specified. The size is inferred from the * max_array_access field. |