https://bugs.freedesktop.org/show_bug.cgi?id=106903
Bug ID: 106903
Summary: radv: Fragment shader output goes to wrong attachments
when render targets are sparse
Product: Mesa
Version: git
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/Vulkan/radeon
Assignee: mesa-dev@lists.freedesktop.org
Reporter: philip.rebo...@tu-dortmund.de
QA Contact: mesa-dev@lists.freedesktop.org
Created attachment 140140
--> https://bugs.freedesktop.org/attachment.cgi?id=140140&action=edit
Patch for the 'deferred' demo
Hello,
when there's an unused color attachment in a subpass, it looks like fragment
shader outputs are not written to the correct attachments, i.e. if attachment
reference 1 is VK_ATTACHMENT_UNUSED, the fragment shader output at location 2
is written to the 3rd attachment and the output at location 3 is discarded
entirely. This causes rendering issues in Vampyr on DXVK.
The attached patch for Sasha Willems 'deferred' demo demonstrates the issue. It
works as expected on amdvlk. Mind that the affected fragment shader needs to be
recompiled manually.
Regards,
- Philip
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