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resolve_alpha_mode

frust_gpu::surface

Function resolve_alpha_mode 

Source 
pub fn resolve_alpha_mode(
    request: SurfaceAlphaRequest,
    capabilities: &SurfaceCapabilities,
) -> CompositeAlphaMode
Expand description

Resolves a caller’s SurfaceAlphaRequest against the live surface’s reported alpha_modes, choosing the actual wgpu::CompositeAlphaMode to configure with.

Opaque resolves to Auto without consulting the surface at all. TranslucentPreferred tries, in order, Inherit (Android’s only reported translucent mode), PostMultiplied (iOS’s translucent mode), then PreMultiplied — falling back to Auto with a log::warn! when none of the three is in capabilities.alpha_modes (translucency is simply unavailable on that surface).