Last Updated: 2018-02-06
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All draft specs here are related to import/export of dma-bufs and DRM format modifiers.
I have a work-in-progress implementation of all these extensions in anvil (Intel's Vulkan driver), in my Mesa branch wip/anv-dma-buf. I'm testing it with a hacked version of Kristian Høegsberg's vkcube. See my vkcube branch wip/vk-drm-format-mods.
But you should look at Jason Ekstrand's Mesa branch ~jekstrand/wip/anv-format-modifier instead, because my branch is out-of-date (as of 2018-02-06).