vyre-conform 0.1.0

Conformance suite for vyre backends — proves byte-identical output to CPU reference
Documentation 
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//! Capability translation from wgpu adapter features to naga validation caps.
//!
//! Before compiling a WGSL shader, the backend translates the adapter's
//! reported features and downlevel flags into the naga capability bitmask.
//! This ensures validation runs with exactly the feature set the GPU supports,
//! catching shaders that use unsupported extensions before they reach the driver.

/// Map wgpu adapter features/downlevel to the naga capabilities the GPU supports.
pub(super) fn adapter_naga_capabilities(
    features: wgpu::Features,
    downlevel: wgpu::DownlevelCapabilities,
) -> naga::valid::Capabilities {
    use naga::valid::Capabilities as Caps;
    let mut caps = Caps::empty();
    caps.set(
        Caps::PUSH_CONSTANT,
        features.contains(wgpu::Features::PUSH_CONSTANTS),
    );
    caps.set(Caps::FLOAT64, features.contains(wgpu::Features::SHADER_F64));
    caps.set(
        Caps::PRIMITIVE_INDEX,
        features.contains(wgpu::Features::SHADER_PRIMITIVE_INDEX),
    );
    caps.set(
        Caps::SAMPLED_TEXTURE_AND_STORAGE_BUFFER_ARRAY_NON_UNIFORM_INDEXING,
        features.contains(
            wgpu::Features::SAMPLED_TEXTURE_AND_STORAGE_BUFFER_ARRAY_NON_UNIFORM_INDEXING,
        ),
    );
    caps.set(
        Caps::UNIFORM_BUFFER_AND_STORAGE_TEXTURE_ARRAY_NON_UNIFORM_INDEXING,
        features.contains(
            wgpu::Features::UNIFORM_BUFFER_AND_STORAGE_TEXTURE_ARRAY_NON_UNIFORM_INDEXING,
        ),
    );
    caps.set(
        Caps::SAMPLER_NON_UNIFORM_INDEXING,
        features.contains(
            wgpu::Features::SAMPLED_TEXTURE_AND_STORAGE_BUFFER_ARRAY_NON_UNIFORM_INDEXING,
        ),
    );
    caps.set(
        Caps::STORAGE_TEXTURE_16BIT_NORM_FORMATS,
        features.contains(wgpu::Features::TEXTURE_FORMAT_16BIT_NORM),
    );
    caps.set(
        Caps::MULTIVIEW,
        features.contains(wgpu::Features::MULTIVIEW),
    );
    caps.set(
        Caps::EARLY_DEPTH_TEST,
        features.contains(wgpu::Features::SHADER_EARLY_DEPTH_TEST),
    );
    caps.set(
        Caps::SHADER_INT64,
        features.contains(wgpu::Features::SHADER_INT64),
    );
    caps.set(
        Caps::SHADER_INT64_ATOMIC_MIN_MAX,
        features.intersects(
            wgpu::Features::SHADER_INT64_ATOMIC_MIN_MAX
                | wgpu::Features::SHADER_INT64_ATOMIC_ALL_OPS,
        ),
    );
    caps.set(
        Caps::SHADER_INT64_ATOMIC_ALL_OPS,
        features.contains(wgpu::Features::SHADER_INT64_ATOMIC_ALL_OPS),
    );
    caps.set(
        Caps::TEXTURE_ATOMIC,
        features.contains(wgpu::Features::TEXTURE_ATOMIC),
    );
    caps.set(
        Caps::TEXTURE_INT64_ATOMIC,
        features.contains(wgpu::Features::TEXTURE_INT64_ATOMIC),
    );
    caps.set(
        Caps::SHADER_FLOAT32_ATOMIC,
        features.contains(wgpu::Features::SHADER_FLOAT32_ATOMIC),
    );
    caps.set(
        Caps::MULTISAMPLED_SHADING,
        downlevel
            .flags
            .contains(wgpu::DownlevelFlags::MULTISAMPLED_SHADING),
    );
    caps.set(
        Caps::DUAL_SOURCE_BLENDING,
        features.contains(wgpu::Features::DUAL_SOURCE_BLENDING),
    );
    caps.set(
        Caps::CUBE_ARRAY_TEXTURES,
        downlevel
            .flags
            .contains(wgpu::DownlevelFlags::CUBE_ARRAY_TEXTURES),
    );
    caps.set(
        Caps::SUBGROUP,
        features.intersects(wgpu::Features::SUBGROUP | wgpu::Features::SUBGROUP_VERTEX),
    );
    caps.set(
        Caps::SUBGROUP_BARRIER,
        features.intersects(wgpu::Features::SUBGROUP_BARRIER),
    );
    caps.set(
        Caps::RAY_QUERY,
        features.intersects(wgpu::Features::EXPERIMENTAL_RAY_QUERY),
    );
    caps.set(
        Caps::SUBGROUP_VERTEX_STAGE,
        features.contains(wgpu::Features::SUBGROUP_VERTEX),
    );
    caps
}