diff options
| author | Eric Anholt <[email protected]> | 2010-08-27 12:00:29 -0700 |
|---|---|---|
| committer | Eric Anholt <[email protected]> | 2010-08-27 12:02:15 -0700 |
| commit | 0435cb348aaa8f2d8163a38517a098e27a81adef (patch) | |
| tree | 95d36def29660f282b7864fc165073c1b9863993 /src/mesa | |
| parent | 83e3a2d97095d0ef062f210673eb23031fe1cb9a (diff) | |
i965: Fix swizzling in vector splitting for the new FS backend.
We weren't smearing a component of a split RHS out to reach an unsplit
LHS's writemask, so gl_FragColor (always unsplit) would often get
uninitialized values.
Fixes: glsl-algebraic-add-add-1 (and probably many others).
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs_vector_splitting.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs_vector_splitting.cpp b/src/mesa/drivers/dri/i965/brw_fs_vector_splitting.cpp index d4da86b3b06..00d5c202485 100644 --- a/src/mesa/drivers/dri/i965/brw_fs_vector_splitting.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs_vector_splitting.cpp @@ -281,6 +281,9 @@ ir_vector_splitting_visitor::visit_leave(ir_assignment *ir) if (rhs) { new_rhs = new(mem_ctx) ir_dereference_variable(rhs->components[i]); + /* If we're writing into a writemask, smear it out to that channel. */ + if (!lhs) + new_rhs = new(mem_ctx) ir_swizzle(new_rhs, i, i, i, i, i + 1); } else { new_rhs = new(mem_ctx) ir_swizzle(ir->rhs->clone(mem_ctx, NULL), i, i, i, i, 1); |