https://bugs.freedesktop.org/show_bug.cgi?id=106687
Bug ID: 106687
Summary: radv: Fast color clears use incorrect format
Product: Mesa
Version: git
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/Vulkan/radeon
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
Created attachment 139814
--> https://bugs.freedesktop.org/attachment.cgi?id=139814&action=edit
Possible fix
Hello,
When clearing render targets, fast color clears use the image format rather
than the format of the image view, which is incorrect if the formats differ.
This leads to a rendering issue in ELEX with DXVK:
https://github.com/doitsujin/dxvk/issues/289
Here's a Renderdoc capture that shows the issue (recorded on Polaris):
https://mega.nz/#!NfZAnTxQ!YwtksOUn5OLGxotQss5xbAFOfXddHilTDolUykqihB8
At EID 10305, the game clears a render target view with
VK_FORMAT_R8G8B8A8_UNORM where the image itself has the format
VK_FORMAT_R8G8B8A8_UINT. As a result, the alpha value of the cleared image is
incorrect (129 instead of 1).
This issue does not occur when setting RADV_DEBUG=nofastclears.
The attached patch fixes the issue for this game, although I'm not sure if it
is entirely correct.
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