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tests: Mark a test about resource aliasing as todo on MoltenVK.

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As far as I know there is no way to implement this properly on
Vulkan, and all the other Vulkan implementations essentially work
by luck. In Vulkan the initial layout of a resource must always be
UNDEFINED or PREINITIALIZED and it must be transitioned away from
before any meaningful use of that image is done. Therefore it's
possible to alias two images and let the second one inherit the
content in the first one only if both already exist (and are in
the same layout) before the first writing is done. If, as in this
example, the second image is created after the first one has
already been written to, the obligatory transition away from
UNDEFINED or PREINITIALIZED will potentially wipe out the content.

Therefore I am marking this as todo, not as a bug. I might also be
that there is a bug in MoltenVK, and ultimately that's the reason
why we're reading invalid data, but technically the Vulkan
commands we generate are incorrect anyway.
This commit is contained in:
Giovanni Mascellani 2025-03-14 11:05:32 +01:00 committed by Henri Verbeet
parent 44072062ff
commit e418bbcfac
Notes: Henri Verbeet 2025-03-17 15:29:57 +01:00 
Approved-by: Henri Verbeet (@hverbeet)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/1429
1 changed files with 1 additions and 0 deletions
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tests/d3d12.c
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@ -32900,6 +32900,7 @@ static void test_64kb_texture_alignment(void)
transition_resource_state(command_list, textures[1],
D3D12_RESOURCE_STATE_COPY_DEST, D3D12_RESOURCE_STATE_COPY_SOURCE);
get_resource_readback_with_command_list(textures[1], 0, &rb, queue, command_list);
todo_if(is_mvk_device(device))
check_readback_data_uint(&rb.rb, &box, 0xdeadbeef, 0);
release_resource_readback(&rb);