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vc4/nir_lower_blend: update write mask when we update num components

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As explained at the header of the lowering:

  "Once this pass is done, the color write will either have one
   component (for single sample) with packed argb8888, or 4 components
   with the per-sample argb8888 result."

So in several cases the lowering was updating the number of
components, so we need to update the writemask too.

Reviewed-by: Juan A. Suarez <jasuarez@igalia.com>
Reviewed-by: Jose Maria Casanova Crespo <jmcasanova@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14708>
This commit is contained in:
Alejandro Piñeiro
2022-01-25 13:59:45 +01:00
committed by Marge Bot
parent 67220077ed
commit 4ab6631949
1 changed files with 5 additions and 1 deletions
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src/gallium/drivers/vc4/vc4_nir_lower_blend.c
+5 -1
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@@ -562,7 +562,11 @@ vc4_nir_lower_blend_instr(struct vc4_compile *c, nir_builder *b,
nir_instr_rewrite_src(&intr->instr, &intr->src[0],
nir_src_for_ssa(blend_output));
intr->num_components = blend_output->num_components;
if (intr->num_components != blend_output->num_components) {
unsigned component_mask = BITFIELD_MASK(blend_output->num_components);
nir_intrinsic_set_write_mask(intr, component_mask);
intr->num_components = blend_output->num_components;
}
}
static bool