basisu_wuffs.cpp defines WUFFS_IMPLEMENTATION and #includes the unmodified
encoder/3rdparty/wuffs-v0.4.c with all warnings silenced in that TU only
(MSVC #pragma warning(push, 0)/pop; gcc/clang diagnostic push/ignored/pop).
basisu_wuffs_config.h holds the Wuffs configuration (modules BASE core/
interfaces/pixconv, ADLER32, CRC32, DEFLATE, ZLIB, PNG, JPEG, TARGA, QOI;
RGBA_NONPREMUL destination only; WUFFS_CONFIG__AVOID_CPU_ARCH = no SIMD), shared
with basisu_enc.cpp's declarations-only include (next commit). With
BASISU_USE_WUFFS_LDR_LOADER=0 the TU compiles to nothing.
Added to every build that compiles the encoder: root CMakeLists.txt
(native, -m32, WASI, Python module) with a BASISU_USE_WUFFS_LDR_LOADER option
(default ON), webgl/encoder/CMakeLists.txt (all Emscripten variants, same
option), and encoder_lib.vcxproj/.filters (basisu.sln: basisu, examples).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Newer Emscripten (6.0.x) no longer includes mainScriptUrlOrBlob in its default INCOMING_MODULE_JS_API,
so the threaded encoder loaded via importScripts() in ktx2_studio/encode-worker.js ignored it and the
pthread pool never came up (the worker hangs while loading). Add it explicitly (Emscripten's default list
plus mainScriptUrlOrBlob), as in the development tree.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
With the default DYNAMIC_EXECUTION=1, embind generates its invokers at
runtime with new Function(). A Content-Security-Policy without
'unsafe-eval' blocks this, so the transcoder and encoder fail to start
with an EvalError.
Add two CMake options to webgl/transcoder and webgl/encoder:
- NO_DYNAMIC_EXECUTION (default OFF) adds -s DYNAMIC_EXECUTION=0.
- EMBIND_AOT (default ON, only used with NO_DYNAMIC_EXECUTION) adds
-s EMBIND_AOT=1. This generates the invokers at build time, so
embind calls stay as fast as with the default build.
The default build does not change. The .wasm output is byte-identical
in all configurations; only the JS glue changes.
Fixes#464
The cPackUASTC* values are members of an anonymous enum. embind's
constant() registers a constant against the type of its value, and no
binding exists for an anonymous enum type. embind therefore waits for
that type forever, and the constants never appear on the module.
Module.cPackUASTCLevelDefault and the others are undefined in the
shipped basis_encoder.js.
Cast the values to uint32_t so that they bind as plain numbers.
EMBIND_AOT=1 makes this a link error ("Missing binding for type"), so
this change is also necessary to build the encoder with that flag.
--slow uses `make -j1` (one file at a time, the classic manual `make`)
instead of the default `make -j$(nproc)`. Useful for readable output or
constrained machines; parallel remains the default.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
For a more thorough clean, --clean now runs `make clean` (removing the
build outputs and object files via the existing build system) before
deleting CMakeCache.txt/CMakeFiles and reconfiguring.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Convenience script (place: webgl/build.sh) that runs emcmake/cmake/make
in webgl/transcoder/build and webgl/encoder/build. Stops on the first
error (set -euo pipefail), builds both by default or a named target
(transcoder/encoder), supports --clean and -D... cmake pass-through, is
runnable from any directory, and auto-sources emsdk if emcmake is not on
PATH.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This update impacts the UASTC HDR 4x4, UASTC HDR 6x6i, and XUASTC LDR formats. New KTX2 files in these specific formats using v2.1 can't be loaded using v2.0, however we've kept backwards compatibility with all of our previously written KTX2 files. (v2.1 can transcode all previously written files.)
This is part of our effort to be compatible with Khronos's specification.
bc6hf encoder's smooth block path updated to handle inputs with texels close to MAX_HALF_FLOAT.
Adding command line options to basisu tool so it can write either v2.0 or v1.6 compatible UASTC HDR 6x6i files. The default is v1.6.
Updating WebGL KTX2 testbed so on ASTC devices it automatically switches between sRGB or linear internal formats for the created texture.
Richard GeldreichandClaude Opus 5.5
Ben Polinsky