By default, emscripten's generated javascript modules lives in the global object "Module'.
This makes it impossible to load multiple emscripten modules on the same page.
In attempt to avoid namespace collision, this change modularizes the emscripten build so the Module is instead called 'BASIS'.
Many target applications for Basis are likely to already be using other emscripten modules.
Testing:
The existing webgl/(texture|gltf) pages have been updated to use the new name and seem to operate as before
- For PVRTC1, we now memset() any extra blocks after the blocks we know will be transcoded into. This is done because in GL there is padding that occurs on textures smaller than 8x8.
- Removing all OpenMP usage and replacing it with a basis C++11 job system.
- Fixing TSVQ class so it can split very long "thin" clusters that before weren't being split. This improves endpoint quantization on videos and complex 2D textures.
- More frontend perf. optimizations.
Tested on OSX, Linux with gcc/clang, and Win using MSVC 2019.
It looks like #7 didn't update CMakeLists.txt properly - defines
specified with -D have to be added as compile definitions.
Additionally, -O3 must be specified redundantly as a compile option and
as a link option - compile option makes .wasm bits small & fast, and
link option enables JS minifier.
After this fix CMake build results in minimal js/wasm files as well.
This change makes it possible to exclude formats using compile time
options. BC7 is *never* exposed on the web and it has an absolutely huge
coding table which means we're just wasting space.
basis_transcoder.js 58707
basis_transcoder.wasm 224404
The impact on the file size is enormous, and it's used to output one
line into console which isn't exposed through the API anyhow.
basis_transcoder.js 58707
basis_transcoder.wasm 705079
- Adding -csv_file option, to generate .csv files for mass benchmarking/testing
- Adding -no_ktx option, to avoid writing large .KTX files while unpacking
- Fixing printf() format issue when one of the -multifile options wasn't correct
Rebuilt compiled javascript transcoder
Increasing the max codebook size to 16K vs. 8K, for a major increase in the max achievable quality.
Adding exception catching to command line tool.
Enabling debug iterators on MSVC.
Refining command line options, adding "-individual" flag to create multiple .basis files (vs. a texture array).
Changing default colorspace to sRGB, because that's probably the best default. -linear disables this and uses linear colorspace metrics.
PNG reader in 32-bit builds checks the size of the file before loading to avoid out of memory exceptions.
Adding new fields to the basis header: texture type and framerate. Texture type may be 2D, 2D array, video, volume, or cubemap array. The compressor makes sure that anything other than pure 2D follows certain constraints (cubemap arrays must have a multiple of 6 input images, videos/texture array images all must have the same resolution/# of mipmaps, etc.)
When unpacking cubemaps, the -unpack command now writes cubemap .KTX files which various tools like PVRTexTool support.
