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tu: Be more granular in calculating whether blend state reads color

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There could be several attachments where none of them are written to.
Happens with pre-2.0 DXVK.

Signed-off-by: Danylo Piliaiev <dpiliaiev@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33802>
This commit is contained in:
Danylo Piliaiev 2025-02-26 19:16:14 +01:00 • committed by Marge Bot
parent 014f376755
commit 75a85134fa
1 changed files with 16 additions and 0 deletions
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16
src/freedreno/vulkan/tu_pipeline.cc
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@ -2906,6 +2906,22 @@ tu6_calc_blend_lrz(const struct vk_color_blend_state *cb,
if (cb->logic_op_enable && tu_logic_op_reads_dst((VkLogicOp)cb->logic_op))
return true;
bool has_enabled_attachments = false;
for (unsigned i = 0; i < cb->attachment_count; i++) {
if (rp->color_attachment_formats[i] == VK_FORMAT_UNDEFINED)
continue;
const struct vk_color_blend_attachment_state *att = &cb->attachments[i];
if ((cb->color_write_enables & (1u << i)) && att->write_mask != 0) {
has_enabled_attachments = true;
break;
}
}
/* There is no partial write if there is no writes at all. */
if (!has_enabled_attachments)
return false;
for (unsigned i = 0; i < cb->attachment_count; i++) {
if (rp->color_attachment_formats[i] == VK_FORMAT_UNDEFINED)
continue;