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SaschaWillems / vulkan.gpuinfo.org

Front-End and Back-End for the Vulkan Hardware Database
https://vulkan.gpuinfo.org
GNU Affero General Public License v3.0
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Implicit support for transfer src/dst on images is not displayed #79

Open vandench opened 9 months ago

vandench commented 9 months ago

When looking at the list of supported operations for image formats, transfer source and destination never get above 85.77%, even when support for sampling is at 100%.

The root cause seems to be that the feature flags for transfer operations weren't added until Vulkan 1.1 (or with VK_KHR_maintenence1), but some drivers reported never got an update to the database past Vulkan 1.0. In the description for VK_FORMAT_FEATURE_TRANSFER_SRC_BIT and VK_FORMAT_FEATURE_TRANSFER_DST_BIT, it is mentioned that if a driver only supports Vulkan 1.0, then the transfer operations are implied when the feature flag is not 0 (i.e. when the driver supports any other operation on that format).

It would be a nice QoL feature, and reduce some confusion, if the implicit support for transfer operations from 1.0 drivers was included in the calculation of the optimal tiling support list.

SaschaWillems commented 9 months ago

Thanks for bringing this up. Doing this won't be easy as to how the database back-end works, but I'll be looking into it. For newer devices a workaround is to select VK1.1 (or newer) via the global version selector.