penpot/render-wasm/_build_env

#!/usr/bin/env bash

if [ "$NODE_ENV" = "production" ];  then
    export _BUILD_MODE="release";
else
    export _BUILD_MODE=${1:-debug};
fi

# 256 MB of initial heap to perform less
# initial calls to memory grow.
EM_INITIAL_HEAP=$((256 * 1024 * 1024))

# 1.0 doubles the heap on every growth.
EM_MEMORY_GROWTH_GEOMETRIC_STEP="0.8"

# Malloc implementation to use.
# - dlmalloc: a powerful general-purpose malloc.
# - emmalloc: a simple and compact malloc designed for emscripten.
# - emmalloc-debug: use emmalloc and add extra assertion checks.
# - emmalloc-memvalidate: use emmalloc with assertions+heap consistency checking.
# - emmalloc-verbose: use emmalloc with assertions + verbose logging.
# - emmalloc-memvalidate-verbose: use emmalloc with assertions + heap consistency checking + verbose logging.
# Default: dlmalloc
EM_MALLOC="dlmalloc"

EMCC_CFLAGS="--no-entry \
    --js-library src/js/wapi.js \
    -sASSERTIONS=1 \
    -sALLOW_TABLE_GROWTH=1 \
    -sALLOW_MEMORY_GROWTH=1 \
    -sINITIAL_HEAP=$EM_INITIAL_HEAP \
    -sMEMORY_GROWTH_GEOMETRIC_STEP=$EM_MEMORY_GROWTH_GEOMETRIC_STEP \
    -sENVIRONMENT=web \
    -sERROR_ON_UNDEFINED_SYMBOLS=0 \
    -sMAX_WEBGL_VERSION=2 \
    -sMODULARIZE=1 \
    -sEXPORT_NAME=createRustSkiaModule \
    -sEXPORTED_RUNTIME_METHODS=GL,stringToUTF8,HEAPU8,HEAPU32,HEAPF32 \
    -sEXPORT_ES6=1"

export EM_CACHE="/tmp/emsdk_cache";

_CARGO_PARAMS="${@:2}";

if [ "$_BUILD_MODE" = "release" ]; then
    _CARGO_PARAMS="--release $_CARGO_PARAMS"
    EMCC_CFLAGS="-Os $EMCC_CFLAGS"
else
    # TODO: Extra parameters that could be good to look into:
    #        -gseparate-dwarf
    #        -gsplit-dwarf
    #        -gsource-map
    EMCC_CFLAGS="-g $EMCC_CFLAGS -sVERBOSE=1 -sMALLOC=$EM_MALLOC"
fi

export EMCC_CFLAGS;
export _CARGO_PARAMS;