provoking vertex - is it supported?

[timprepscius]

Hey there,

I think "provoking vertex' is not supported. Because the .def file doesn't include it as an extension.

And when I try to do the following (just ignore that it's pseudo code) it doesn't work:

    vku::DeviceMaker dm;
    dm.defaultLayers();
    // the extension doesn't seem to exist
//    dm.extension(VK_EXT_PROVOKING_VERTEX_EXTENSION_NAME);
    
// but let's just try anyway
    vk::PhysicalDeviceProvokingVertexFeaturesEXT provoking;
    provoking.setProvokingVertexLast(true);
    dm.enableCreateInfo((vku::DeviceMaker::DeviceCreateNode *)&provoking);

I just want to check before I go through and write some special case code to rearrange index orderings.

Thanks in advance.

[cdavis5e]

Nope. This is not supported yet.

I think there might be a Metal SPI[1] for this, since I'm pretty sure OpenGL on Apple Silicon does support it.

[1]: Service Provider Interface: Apple/IBM jargon for a private programming interface intended for use by other OS components.