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
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.
Fixing overflow issue on extreme colors in color_distance().
Explicitly disabling unaligned addressing in miniz and transcoder when UBSAN is enabled
Disabling a needless optimization in transcoder causing ubsan issues (that could have easily been worked around in a different way, but it was an unnecessary optimization to begin with)
Rebuild wasm builds
- Optimized ETC1S encoder (3-4.5x faster)
- Added optional SSE 4.1 support to encoder
- Switched from std::vector to a custom vector in the encoder and transcoder
- Added CppSPMD (SSE only for now)
- UASTC RDO is now more effective, but the command line parameter controlling qualiy has changed (to "lambda")
Richard GeldreichandClaude Opus 5.5
Ben Polinsky
Aaron Franke
Rich Geldreich