Module shader_cache 

GPU shader cache management.

This module provides compiled shader storage, cache eviction, version tracking, and disk-persistent caching to avoid redundant shader compilation work across process restarts.

Disk cache layout

The persistent cache stores each entry as a pair of files inside the configured directory:

<cache_dir>/<hex_hash>_<backend>_<flags>.shd   – raw bytecode
<cache_dir>/<hex_hash>_<backend>_<flags>.meta  – metadata (JSON-like text)

The text metadata file contains a single line: <source_hash> <backend> <feature_flags> <created_unix_secs>.

Structs

CompiledShader

A compiled shader blob stored in the cache.

DiskCacheStats

Statistics for the disk cache.

DiskShaderCache

Disk-persistent GPU shader cache.

GpuShaderCache

In-process GPU shader cache.

ShaderCacheStats

Statistics for the shader cache.

ShaderVersion

Version identifier for a compiled shader.

Enums

DiskCacheError

Errors that can occur during disk cache I/O.

EvictionPolicy

Eviction policy for the shader cache.

Functions

age_of

Estimate the age of a SystemTime relative to now.

hash_source

Compute a simple 64-bit FNV-1a hash of a byte slice.