INNOZIP compression corpus: game assets, CC0 set (version 1.1)

Abstract

INNOZIP compression corpus: game assets, CC0 set (version 1.1) Game-asset files for measuring lossless compressors: GPU texture payloads in DDS, ASTC and KTX2 containers written by several public encoders at several settings, KTX2 supercompression wrappers, glTF / GLB meshes (plain, Draco, quantized variants) and Ogg Vorbis sound effects. Every file in this record is either published under CC0 1.0 by its author or generated from CC0 inputs by encoders whose licences place no condition on their output. The set was built for the INNOZIP compressor's test corpus; it is published so that measurements on it can be repeated. 744 files, 1081.4 MB. Licence of every file: CC0 1.0 (LICENSE-CC0-1.0.txt). Contents archive | files | size 27-game-assets_audio.zip | 18 | 3.8 MB 27-game-assets_meshes.zip | 29 | 54.3 MB 27-game-assets_textures-astc.zip | 166 | 112.4 MB 27-game-assets_textures-dds.zip | 394 | 698.4 MB 27-game-assets_textures-ktx2.zip | 62 | 74.2 MB 27-game-assets_wrappers.zip | 75 | 138.5 MB Each zip is STORED (no compression; member bytes are the files themselves), members sorted, timestamps fixed, so the archives are reproducible from the files. Member names are the paths in MANIFEST.tsv (27-game-assets/ /...). MANIFEST.tsv: one row per file -- path, bytes, sha256, archive, licence, attribution, source URL, inputs (source file and its sha256 for generated files), the generation command, the detected format. SHA256SUMS.txt: sha256 of every file and of every zip. How the files were produced Textures (textures-dds, textures-astc, textures-ktx2): from CC0 source images (Poly Haven textures and HDRIs, ambientCG materials, the Kenney UI Pack 2.0 packed into one atlas, and one generated noise image). Each source was converted once to an 8-bit RGBA work image, which the encoders read. Encoders: bc7enc_rdo (BC1 / BC3 / BC4 / BC5 / BC7, rate-distortion strengths), DirectXTex texconv / texassemble (BC1-BC7, BC6H, cube / array / volume), astcenc 5.7.0 (ASTC 4x4 / 6x6 / 8x8, LDR and HDR), etcpak (ETC2 / BC), KTX-Software 4.4.2 ktx create (KTX2, ASTC, UASTC, BasisLZ, zstd). The exact command for each file is in MANIFEST.tsv, column generation. Wrappers (wrappers): KTX2 files with raw RGBA8, raw BC7 and ASTC 6x6 payloads, each with no supercompression, zstd level 5 and zstd level 19, and UASTC (with and without RDO) and BasisLZ encodings. Meshes (meshes): Khronos glTF-Sample-Assets models published under CC0 (Avocado, BarramundiFish, BoomBox, Lantern, SheenCloth, ToyCar), files as published. Audio (audio): Kenney Impact Sounds, Interface Sounds and RPG Audio (CC0; individual files as published and one uncompressed tar per pack). Encoder licences (they cover the tools, not their output): bc7enc_rdo MIT or Unlicense; DirectXTex MIT; astcenc Apache-2.0; KTX-Software Apache-2.0; etcpak MIT (Python wrapper) over BSD-3-Clause. Verify unzip 27-game-assets_textures-dds.zip # and the other archives sha256sum -c SHA256SUMS.txt # every file and every zip Credits (not required by CC0; given with thanks) Poly Haven (polyhaven.com), ambientCG (ambientCG.com), Kenney (kenney.nl), the Khronos glTF-Sample-Assets contributors as their model READMEs name them: Microsoft (Avocado, BarramundiFish, BoomBox, SheenCloth; Lantern), sbtron (Lantern, initial version), Frank Galligan (Lantern, Draco compression), Guido Odendahl and Eric Chadwick (ToyCar). INNOZIP is a trademark of Eugen Spivak. Changes in version 1.1 Version 1.1 corrects MANIFEST.tsv and README.md; the data files, the archives and SHA256SUMS.txt are unchanged. MANIFEST.tsv: (1) the encoder licence of etcpak in the generation column (an MIT-licensed Python wrapper over the BSD-3-Clause library; 94 rows); (2) the inputs column of the six cube, array and volume texture files, which now list each source image with its SHA-256 (6 rows); (3) the ktx create command of the 53 ETC2 KTX2 files, whose format name was split by a tool note; (4) the generation column of the three tar archives, which now names the public tool and its settings; (5) the generation column of 15 KTX2 wrapper files, reworded to describe how each file was written. README.md: two sentences in "How the files were produced" reworded in the same way, and the credits name every glTF-Sample-Assets contributor as the model READMEs do.