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https://github.com/GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator
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VMA_MEMORY_USAGE_AUTO* flags: Added support for rare case when a resource used on the device, not used on the host, may still be preferred in host memory
An update in the documentation.
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@ -600,7 +600,7 @@ typedef enum VmaAllocationCreateFlagBits
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This includes allocations created in \ref custom_memory_pools.
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Declares that mapped memory can be read, written, and accessed in random order,
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so a `HOST_CACHED` memory type is preferred.
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so a `HOST_CACHED` memory type is required.
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*/
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VMA_ALLOCATION_CREATE_HOST_ACCESS_RANDOM_BIT = 0x00000800,
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/**
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@ -3639,7 +3639,11 @@ static bool FindMemoryPreferences(
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// GPU access, no CPU access (e.g. a color attachment image) - prefer GPU memory
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if(deviceAccess)
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{
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outPreferredFlags |= VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT;
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// ...unless there is a clear preference from the user not to do so.
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if(preferHost)
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outNotPreferredFlags |= VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT;
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else
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outPreferredFlags |= VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT;
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}
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// No direct GPU access, no CPU access, just transfers.
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// It may be staging copy intended for e.g. preserving image for next frame (then better GPU memory) or
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