Mike Blumenkrantz
9c8b6754b0
in a scenario where an ordered read op occurs for an image,
successive read-only barriers SHOULD be able to be promoted
...but they can't, because there isn't yet a mechanism for handling layout
transitions between the unordered cmdbuf and the ordered cmdbuf,
meaning that promoting e.g., a SHADER_READ_ONLY barrier after a TRANSFER_SRC
barrier will leave the image with the wrong layout for the transfer op:
TRANSFER_SRC(unordered) -> COPY(ordered) -> SHADER_READ_ONLY(unordered)
becomes
TRANSFER_SRC(unordered) -> SHADER_READ_ONLY(unordered) -> COPY(ordered)
ideally I'll get around to figuring this out at some point
affects:
dEQP-GLES31.functional.copy_image.non_compressed.viewclass_32_bits.r32i_r32i.texture2d_array_to_renderbuffer
Fixes: bf0af0f8ed ("zink: move all barrier-related functions to c++")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23035>
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