6a58554568
The only piece added by this extension is the `DeviceIndex` builtin, which tells the shader which device in a grouped logical device it is running on. Metal's pipeline state objects are owned by the `MTLDevice` that created them. Since Metal doesn't support logical grouping of devices the way Vulkan does, we'll thus have to create a pipeline state for each device in a grouped logical device. The upcoming peer group support in Metal 3 will not change this. For this reason, for Metal, the device index is supplied as a constant at pipeline compile time. There's an interaction between `VK_KHR_device_group` and `VK_KHR_multiview` in the `VK_PIPELINE_CREATE_VIEW_INDEX_FROM_DEVICE_INDEX_BIT`, which defines the view index to be the same as the device index. The new `view_index_from_device_index` MSL option supports this functionality. |
||
|---|---|---|
| .. | ||
| comp | ||
| frag | ||
| rchit | ||
| rgen | ||
| rmiss | ||
| vert | ||