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If dual blending is enabled, only 1 output is supported. Multiple
outputs confuse the write combining pass in this case, leading to
incorrect output and/or an assert failure in emit_fragment_store.
The fix is straightforward, just skip the speculative emitting of
multiple outputs in the case where dual source blending is enabled.
This also adds an extra sanity check in `pan_nir_lower_zs_store` to
check for only one blend store being present.
Fixes:
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| .. | ||
| ci | ||
| compiler | ||
| drm-shim | ||
| ds | ||
| include | ||
| lib | ||
| midgard | ||
| perf | ||
| shared | ||
| tools | ||
| util | ||
| vulkan | ||
| .clang-format | ||
| meson.build | ||