Add ktx

2026-06-14 19:09:18 +01:00
parent 14bd1a9271
commit 13fa90a0e9
3958 changed files with 999286 additions and 4 deletions
@@ -0,0 +1,4 @@
+build/*
+!build/basis_loader.js
+!build/basis_transcoder.js
+!build/basis_transcoder.wasm
@@ -0,0 +1,52 @@
+cmake_minimum_required(VERSION 3.0)
+
+project(basisu_transcoder_js)
+
+# KTX2 support (and Zstandard) in the transcoder is purely optional. Use "cmake -DKTX2=FALSE" to completely disable KTX2 support (which also disables Zstandard).
+# If this is FALSE you'll only be able to transcode .basis files.
+option(KTX2 "KTX2" TRUE)
+
+# If KTX2 is enabled, Zstandard is needed to support decompressing supercompressed UASTC files. 
+# If you know you'll never be transcoding KTX2 files using this feature you can set KTX2_ZSTANDARD to 0.
+option(KTX2_ZSTANDARD "KTX2_ZSTANDARD" TRUE)
+
+message("KTX2=${KTX2}")
+message("KTX2_ZSTANDARD=${KTX2_ZSTANDARD}")
+
+if (EMSCRIPTEN)
+  set(CMAKE_CXX_STANDARD 11)
+  
+  set(SRC_LIST
+  	../../transcoder/basisu_transcoder.cpp
+	basis_wrappers.cpp
+  )
+  
+  if (KTX2)
+	set(KTX2_DEFINITION BASISD_SUPPORT_KTX2=1)
+  else()
+  	set(KTX2_DEFINITION BASISD_SUPPORT_KTX2=0)
+  endif()
+  
+  if (KTX2_ZSTANDARD)
+ 	set(SRC_LIST ${SRC_LIST}
+		../../zstd/zstddeclib.c
+	)
+	set(ZSTD_DEFINITION BASISD_SUPPORT_KTX2_ZSTD=1)
+  else()
+  	set(ZSTD_DEFINITION BASISD_SUPPORT_KTX2_ZSTD=0)
+  endif()
+  
+#  message("KTX2_DEFINITION=${KTX2_DEFINITION})
+#  message("ZSTD_DEFINITION=${ZSTD_DEFINITION})
+
+  add_executable(basis_transcoder.js ${SRC_LIST})
+
+  target_compile_definitions(basis_transcoder.js PRIVATE NDEBUG BASISD_SUPPORT_UASTC=1 BASISD_SUPPORT_BC7=1 BASISD_SUPPORT_ATC=0 BASISD_SUPPORT_ASTC_HIGHER_OPAQUE_QUALITY=0 BASISD_SUPPORT_PVRTC2=0 BASISD_SUPPORT_FXT1=0 BASISD_SUPPORT_ETC2_EAC_RG11=0 BASISU_SUPPORT_ENCODING=0 ${KTX2_DEFINITION} ${ZSTD_DEFINITION} )
+  target_compile_options(basis_transcoder.js PRIVATE -O3 -fno-strict-aliasing)
+  target_include_directories(basis_transcoder.js PRIVATE ../../transcoder)
+
+  set_target_properties(basis_transcoder.js PROPERTIES
+      OUTPUT_NAME "basis_transcoder"
+      SUFFIX ".js"
+      LINK_FLAGS "--bind -s ALLOW_MEMORY_GROWTH=1 -O3 -s ASSERTIONS=0 -s MALLOC=emmalloc -s MODULARIZE=1 -s EXPORT_NAME=BASIS ")
+endif()
@@ -0,0 +1,7 @@
+Prebuilt versions of `basis_transcoder.js` and `basis_transcoder.wasm` are included in the `build/` folder, and are sufficient for local demos. To build the transcoder yourself, first install emscripten ([tutorial](https://webassembly.org/getting-started/developers-guide/)) and cmake ([download](https://cmake.org/download/)). Then run:
+
+```shell
+cd webgl/transcoder/build/
+emcmake cmake ../
+make
+```