Only allocate device memory if explicitly requested #2269
Merged
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Matches DXVK behaviour and should fix #2258, but needs testing.
The idea here is that if we want to allocate system memory (as a fallback or otherwise, e.g.
UPLOAD
heaps in an app that also uses GPU upload heaps), we should never try to allocate from device-local memory unless all supported memory types for a given allocation are device-local.Also fixes the possible case where a fallback allocation with no property flags would attempt to allocate from
DEVICE_LOCAL
again. This only hasn't been an issue so far because most drivers allow oversubscribing VRAM, but this is not guarateed.