Struct GpuBackendFactory 

pub struct GpuBackendFactory;

Vendor detection and backend creation

Implementations

impl GpuBackendFactory

pub fn detect_available_vendors() -> Vec<GpuVendor>

Detect available GPU vendors.

This used to unconditionally claim NVIDIA and AMD and Intel were all present on every Linux/Windows machine (and Intel on every Mac, which is simply false on Apple Silicon). It now either asks something real or reports honestly empty instead of guessing:

• macOS: every system has at least one Metal-capable device, so this opens a real scirs2_core::gpu::GpuContext on the Metal backend and reports Apple only if that actually succeeds. It never claims Intel: most Macs sold since 2020 have none.
• Linux: reads real PCI vendor IDs from /sys/bus/pci/devices (no FFI, no root required) via the private detect_pci_display_vendors helper below.
• Everywhere else (including Windows): this crate has no dependency-free way to query real vendor hardware, so it reports an empty list rather than a fabricated one.

pub fn get_preferred_vendor() -> GpuVendor

The first vendor from Self::detect_available_vendors this crate has a backend for, preferring the one most likely to work on the current platform. Unknown when detection found nothing — never a fabricated guess.

pub fn create_default_config(vendor: GpuVendor) -> VendorConfig

Create backend configuration for vendor