Fuchsia was (when I left) strictly Vulkan in the core OS interfaces for the rendering stack. Picking one technology rather than pulling over several reduces the

Fuchsia was (when I left) strictly Vulkan in the core OS interfaces for the rendering stack. Picking one technology rather than pulling over several reduces the overall cost of solving for sandboxing that technology. There is still plenty to do in the Vulkan space though - where Chrome solved for webgl we don't yet have a full equivalent for Vulkan, and in some ways Vulkans design has things that make this extra painful (ICDs). At the time when I left the ICD loader is in fact a special case in the OS where it's one of the few mechanisms by which regular components ever get executable memory that does not come directly from their own package (which is a normal and significant design encouraged and policy enforced constraint for most product builds on top of the OS, excepting JITs which are rare). The ICD loader provides a special path for the ICD and some associated data to be loaded from a peer component at runtime. An ideal eventual outcome for secure systems would be to find ways to avoid this vendor runtime mixing, instead for mechanisms to efficiently push command queues through stages of processing. The Vulkan folks have performance related cases to make as to why they took the route they did - I suspect a middle ground is possible eventually but would need new specs and new drivers. Not everything needs this capability, and not everything gets it. Product builds out of the OS can effectively apply policy as to what components get this capability and arrange for other solutions to rendering as best fits the product. The system design makes these choices explicit, rather than implicit, and can be tuned for a particular balance of security, performance and other properties. There was an RFC recently formalizing some of these details, I've not gone over it to see if it also introduced significant new changes. https://fuchsia.dev/fuchsia-src/contribute/governance/rfcs/0205_vulkan_loader?hl=en https://fuchsia.dev/fuchsia-src/contribute/governance/rfcs/0...