yariv.h is a single C/C++ header to encode and decode SPIR-V shaders into a more compressed form I've called YARI-V.
YARI-V is an alternative encoding of the SPIR-V standard that seeks to reduce the bytes required to encode shaders/kernels. In its default mode, it will losslessly convert a SPIR-V shader module into a corresponding YARI-V encoding with an average compression ratio of 34.42%.
Simply include the yariv.h header in your code, and then to encode, first call:
size_t yariv_encode_size(
uint32_t encode_flags,
const void *spirv,
size_t spirv_size);
To get the size (in bytes) of memory required to hold the encoded YARI-V shader module.
Then call:
int yariv_encode(
uint32_t encode_flags,
void *out_yariv,
size_t yariv_size,
const void *spirv,
size_t spirv_size);
Which will return 0 on success, and out_yariv will contain the YARI-V shader module.
Then, to decode, first call:
size_t yariv_decode_size(
const void *yariv,
size_t yariv_size);
To get the size (in bytes) of memory required to hold the decoded SPIR-V shader module.
Then call:
int yariv_decode(
void *out_spirv,
size_t spirv_size,
const void *yariv,
size_t yariv_size);
Which will return 0 on success, and out_spirv will contain the SPIR-V shader module.
| Approach | Size (kilobytes) | Compression (%) |
|---|---|---|
| SPIR-V | 4868.468750 | 100.000000% |
| SPIR-V + zstd20 | 590.573242 | 12.130575% |
| SMOL-V | 1837.881836 | 37.750717% |
| SMOL-V + zstd20 | 386.879883 | 7.946644% |
| YARI-V | 1675.956055 | 34.424706% |
| YARI-V + zstd20 | 390.577148 | 8.022587% |
| SMOL-V(stripped) | 1629.115234 | 33.462580% |
| SMOL-V(stripped) + zstd20 | 348.073242 | 7.149542% |
| YARI-V(stripped) | 1498.666016 | 30.783108% |
| YARI-V(stripped) + zstd20 | 364.057617 | 7.477867% |
This is free and unencumbered software released into the public domain.
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For more information, please refer to http://unlicense.org/
The following folders are held under their own licenses (used for testing purposes only):
- test/external/dota2 - Copyright (c) Valve Corporation, all rights reserved.
- test/external/shadertoy - several most popular shaders from Shadertoy, converted to Vulkan SPIR-V via glslang. Copyrights by their individual authors (filename matches last component of shadertoy URL).
- test/external/talos - Copyright (c) 2002-2016 Croteam, all rights reserved. tests/external/unity - various Unity shaders, produced through a HLSL -> DX11 bytecode -> HLSLcc -> glslang toolchain.