OpenGL & Vulkan

[KnownBugg]

Hi, looks like smoothLines ( part of VkPhysicalDeviceLineRasterizationFeaturesEXT ) is not available on my system. I'm wondering if this is a hardware limitation, driver limitation or something on my end.

vulkaninfo shows this:

VkPhysicalDeviceLineRasterizationFeaturesEXT:
---------------------------------------------
rectangularLines = false
bresenhamLines = true
smoothLines = false
stippledRectangularLines = false
stippledBresenhamLines = true
stippledSmoothLines = false

For context: I was trying to use Mesa's Zink ( OpenGL over Vulkan ) as a workaround for some issues with default OpenGL. It solved my initial problems but introduced a new one. My best guess is that it's related to the missing feature. Can it be made available or is it out of my reach?

[dipak]

Hi @KnownBugg ,

Thank you for the query. I have whitelisted you and moved the post to the Vulkan developers forum.

Thanks.

[KnownBugg]

Thank you!

[Owen_Zhang · Accepted solution]

Hey,

Unfortunately, looks like it's not supported:

It does work via cpu rendering via llvmpipe, but that'll be without the hardware acceleration.

Thanks,

Owen

[KnownBugg]

Hi, just to make sure I get this right. Lack of support for this is a driver limitation and it may ( or may not ) be added in the future? Just curious if it's technically possible to get hardware accelerated support at all.

[Owen_Zhang]

The missing feature is due to lack of HW support currently. In the future we might add a SW workaround.

[KnownBugg]

I see, thank you.