Fix emscripten support

.gitignore

@@ -310,3 +310,17 @@ discord-rpc
 
 # CMake
 cmake-build-*/
+
+# Emscripten
+src/thirdparty/nlohmann/
+emscripten/ext/
+emscripten/www/
+emscripten/temp/
+emscripten/Makefile
+emscripten/CMake*
+emscripten/cmake*
+emscripten/*.a
+emscripten/*.js
+emscripten/*.wasm
+emscripten/static/assets*
+emscripten-output/

cmake/FindSpeexDSP.cmake

@@ -0,0 +1,40 @@
+#
+# - Find speexdsp libraries
+#
+#  SPEEXDSP_INCLUDE_DIRS - where to find speexdsp headers.
+#  SPEEXDSP_LIBRARIES    - List of libraries when using speexdsp.
+#  SPEEXDSP_FOUND        - True if speexdsp is found.
+
+find_package(PkgConfig QUIET)
+pkg_search_module(PC_SPEEXDSP QUIET speexdsp)
+
+find_path(SPEEXDSP_INCLUDE_DIR
+  NAMES
+    speex/speex_resampler.h
+  HINTS
+    ${PC_SPEEXDSP_INCLUDE_DIRS}
+)
+
+find_library(SPEEXDSP_LIBRARY
+  NAMES
+    speexdsp
+  HINTS
+    ${PC_SPEEXDSP_LIBRARY_DIRS}
+)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(SpeexDSP
+  REQUIRED_VARS   SPEEXDSP_LIBRARY SPEEXDSP_INCLUDE_DIR
+  VERSION_VAR     PC_SPEEXDSP_VERSION)
+
+if(SPEEXDSP_FOUND)
+  set(SPEEXDSP_LIBRARIES ${SPEEXDSP_LIBRARY})
+  set(SPEEXDSP_INCLUDE_DIRS ${SPEEXDSP_INCLUDE_DIR})
+  set(SPEEX_INCLUDE_DIRS ${SPEEXDSP_INCLUDE_DIR})
+else()
+  set(SPEEXDSP_LIBRARIES)
+  set(SPEEXDSP_INCLUDE_DIRS)
+  set(SPEEX_INCLUDE_DIRS)
+endif()
+
+mark_as_advanced(SPEEXDSP_LIBRARIES SPEEXDSP_INCLUDE_DIRS SPEEX_INCLUDE_DIRS)

data/language/en-GB.txt

@@ -3787,3 +3787,5 @@ STR_6709    :Enter Smooth Strength between {COMMA16} and {COMMA16}
 STR_6710    :Stable sort
 STR_6711    :Filename:
 STR_6712    :Save
+STR_6713    :Export emscripten data
+STR_6714    :Import emscripten data

emscripten/Dockerfile

@@ -0,0 +1,27 @@
+FROM docker.io/library/fedora:41 AS builder
+
+RUN dnf update -y && dnf install -y git cmake make gcc g++ nlohmann-json-devel autoreconf libtool openssl-devel libcurl-devel fontconfig-devel libzip-devel SDL2-devel flac-devel libvorbis-devel zip speexdsp-devel
+
+WORKDIR /
+
+RUN git clone https://github.com/emscripten-core/emsdk.git
+
+WORKDIR /emsdk/
+
+# Pin version - to prevent sudden breakage of the CI
+RUN ./emsdk install 3.1.74
+RUN ./emsdk activate 3.1.74
+
+WORKDIR /openrct2/
+
+COPY ./ ./
+
+RUN rm -rf emscripten/temp/ emscripten/www/ emscripten/ext/
+
+WORKDIR /emsdk/
+
+RUN . ./emsdk_env.sh && cd /openrct2/emscripten/ && ./build_emscripten.sh
+
+FROM scratch AS export
+
+COPY --from=builder /openrct2/emscripten/www/* .

emscripten/build_emscripten.sh

@@ -0,0 +1,162 @@
+
+cd "$(dirname "$0")"
+
+START_DIR=$(pwd)
+ICU_ROOT=$(pwd)/ext/icu/icu4c/source
+JSON_DIR=/usr/include/nlohmann/
+
+build_ext() {
+	mkdir -p ext/
+	cd ext/
+	# Pin versions - to prevent sudden breakage
+	if [ ! -d "speexdsp" ]; then
+		git clone https://gitlab.xiph.org/xiph/speexdsp.git --depth 1
+        cd speexdsp
+		git fetch --depth=1 origin dbd421d149a9c362ea16150694b75b63d757a521
+		git checkout dbd421d149a9c362ea16150694b75b63d757a521
+        cd ..
+    fi
+	if [ ! -d "icu" ]; then
+		git clone https://github.com/unicode-org/icu.git --depth 1
+        cd icu
+		git fetch --depth=1 origin ba012a74a11405a502b6890e710bfb58cef7a2c7
+		git checkout ba012a74a11405a502b6890e710bfb58cef7a2c7
+        cd ..
+	fi
+	if [ ! -d "libzip" ]; then
+		git clone https://github.com/nih-at/libzip.git --depth 1
+        cd libzip
+		git fetch --depth=1 origin 8352d224d458d86949fd9148dd33332f50a25c7f
+		git checkout 8352d224d458d86949fd9148dd33332f50a25c7f
+        cd ..
+	fi
+	if [ ! -d "zlib" ]; then
+		git clone https://github.com/madler/zlib.git --depth 1
+        cd zlib
+		git fetch --depth=1 origin ef24c4c7502169f016dcd2a26923dbaf3216748c
+		git checkout ef24c4c7502169f016dcd2a26923dbaf3216748c
+        cd ..
+	fi
+	if [ ! -d "vorbis" ]; then
+		git clone https://gitlab.xiph.org/xiph/vorbis.git --depth 1
+        cd vorbis
+		git fetch --depth=1 origin bb4047de4c05712bf1fd49b9584c360b8e4e0adf
+		git checkout bb4047de4c05712bf1fd49b9584c360b8e4e0adf
+        cd ..
+	fi
+	if [ ! -d "ogg" ]; then
+		git clone https://gitlab.xiph.org/xiph/ogg.git --depth 1
+        cd ogg
+		git fetch --depth=1 origin 7cf42ea17aef7bc1b7b21af70724840a96c2e7d0
+		git checkout 7cf42ea17aef7bc1b7b21af70724840a96c2e7d0
+        cd ..
+	fi
+	if [ ! -d "$JSON_DIR" ]; then
+		echo "$JSON_DIR does not exist. Set in build_emscripten.sh or install the nlohmann-json headers!"
+		exit 1
+	fi
+	rm -rf ../../src/thirdparty/nlohmann
+	cp -r $JSON_DIR ../../src/thirdparty/nlohmann
+
+	cd speexdsp
+	emmake ./autogen.sh
+	emmake ./configure --enable-shared --disable-neon
+	emmake make -j$(nproc)
+	cd $START_DIR/ext/
+
+	cd icu/icu4c/source
+	ac_cv_namespace_ok=yes icu_cv_host_frag=mh-linux emmake ./configure \
+		--enable-release \
+		--enable-shared \
+		--disable-icu-config \
+		--disable-extras \
+		--disable-icuio \
+		--disable-layoutex \
+		--disable-tools \
+		--disable-tests \
+		--disable-samples
+	emmake make -j$(nproc)
+	cd $START_DIR/ext/
+
+	cd zlib
+	emcmake cmake ./
+	emmake make zlib -j$(nproc)
+	emmake make install
+	ZLIB_ROOT=$(pwd)
+	cd $START_DIR/ext/
+
+	cd libzip
+	mkdir -p build/
+	cd build/
+	emcmake cmake ../ -DZLIB_INCLUDE_DIR="$ZLIB_ROOT" -DZLIB_LIBRARY="$ZLIB_ROOT/libz.a"
+	emmake make zip -j$(nproc)
+	emmake make install
+	cd $START_DIR/ext/
+
+	cd ogg
+	mkdir -p build/
+	cd build/
+	emcmake cmake ../
+	emmake make -j$(nproc)
+	emmake make install
+	cd $START_DIR/ext/
+
+	cd vorbis
+	mkdir -p build/
+	cd build/
+	emcmake cmake ../
+	emmake make -j$(nproc)
+	emmake make install
+
+	cd $START_DIR
+}
+
+build_assets() {
+	mkdir temp/
+	cd temp/
+	cmake ../../ -DMACOS_BUNDLE=off -DDISABLE_NETWORK=on -DDISABLE_GUI=off
+	make openrct2-cli -j$(nproc)
+	make g2 -j$(nproc)
+	DESTDIR=. make install
+	mkdir -p ../static/assets/
+	cp -r usr/local/share/openrct2/* ../static/assets/
+	cd ../static/assets
+	zip -r ../assets.zip *
+	cd ../
+	rm -rf assets/
+
+	cd $START_DIR
+}
+
+if [ "$1" != "skip" ] ; then
+build_ext
+build_assets
+fi
+
+emcmake cmake ../ \
+	-DDISABLE_NETWORK=ON \
+	-DDISABLE_HTTP=ON \
+	-DDISABLE_TTF=ON \
+	-DDISABLE_FLAC=ON \
+	-DDISABLE_DISCORD_RPC=ON \
+	-DCMAKE_SYSTEM_NAME=Emscripten \
+	-DCMAKE_BUILD_TYPE=Release \
+	-DSPEEXDSP_INCLUDE_DIR="$(pwd)/ext/speexdsp/include/" \
+	-DSPEEXDSP_LIBRARY="$(pwd)/ext/speexdsp/libspeexdsp/.libs/libspeexdsp.a" \
+	-DICU_INCLUDE_DIR="$ICU_ROOT/common" \
+	-DICU_DATA_LIBRARIES=$ICU_ROOT/lib/libicuuc.so \
+	-DICU_DT_LIBRARY_RELEASE="$ICU_ROOT/stubdata/libicudata.so" \
+	-DLIBZIP_LIBRARIES="$(pwd)/ext/libzip/build/lib/libzip.a" \
+	-DEMSCRIPTEN_FLAGS="-s USE_SDL=2 -s USE_BZIP2=1 -s USE_LIBPNG=1 -pthread -O3" \
+	-DEMSCRIPTEN_LDFLAGS="-Wno-pthreads-mem-growth -s ASYNCIFY -s FULL_ES3 -s SAFE_HEAP=0 -s ALLOW_MEMORY_GROWTH=1 -s MAXIMUM_MEMORY=4GB -s INITIAL_MEMORY=2GB -s MAX_WEBGL_VERSION=2 -s PTHREAD_POOL_SIZE=120 -pthread -sEXPORTED_RUNTIME_METHODS=FS,callMain,UTF8ToString,stringToNewUTF8 -lidbfs.js --use-preload-plugins -s MODULARIZE=1 -s 'EXPORT_NAME=\"OPENRCT2_WEB\"'"
+
+emmake make -j$(nproc)
+
+rm -rf www/
+mkdir -p www/
+cd www/
+cp -r ../openrct2.* ./
+cp -r ../static/* ./
+cp -r ../static/.* ./
+
+echo "finished!"

emscripten/static/index.html

@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>OpenRCT2</title>
+        <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/jszip.min.js" crossorigin=anonymous></script>
+        <script src="openrct2.js"></script>
+        <style>
+            * { padding: 0; margin: 0; }
+            canvas {
+                display: block;
+                margin: 0 auto;
+                position: fixed;
+                left: 0;
+                right: 0;
+                width: 100%;
+                height: 100%;
+            }
+        </style>
+        <script src="index.js"></script>
+    </head>
+    <body>
+        <p id="loadingWebassembly">Please wait... Loading webassembly</p>
+        <div id="beforeLoad" style="display:none;">
+            <p id="statusMsg">Please select your RCT2 assets (zip file):</p>
+            <input type="file" id="selectFile"></input>
+        </div>
+        <canvas id="canvas" style="display:none;"></canvas>
+    </body>
+</html>
+