Emscripten port for the source engine (only portal tested)

hosted on yikes.pw

list of broken stuff

• sound
• saving/loading (works, TODO: save to browser storage)
• sometimes render breaks (something related to lightmaps?)
• fullscreen html button (works through game settings)

building

use docker, something like this, there might be some missing libs idk:

docker run --rm -it -v.:/source-engine debian

apt update
apt install git curl wget python3 xz-utils llvm binutils -y

# activate emsdk
cd /
git clone https://github.com/emscripten-core/emsdk.git
cd emsdk
git checkout 2d480a1b7c7a34a354188d93f3e89190a44a1d21
./emsdk install latest
./emsdk activate latest
source ./emsdk_env.sh

cd /source-engine

# patch and rebuild sdl2
embuilder --pic build sdl2 sdl2-mt
sed -Ei 's/freq = EM_ASM_INT/freq = MAIN_THREAD_EM_ASM_INT/' /emsdk/upstream/emscripten/cache/ports/sdl2/SDL-release-2.32.0/src/audio/emscripten/SDL_emscriptenaudio.c
embuilder --force --pic build sdl2 sdl2-mt

# patch glMapBufferRange to allow some "unsupported" parameters
patch /emsdk/upstream/emscripten/src/lib/libwebgl.js emscripten/libwebgl.patch

emmake ./build_emscripten.sh

then download packed game data (yikes.pw/portal/chunks/mapName.data for each map) and put it to ./build/install/chunks/

packing game data

first of all, you'll need to build engine from https://github.com/nillerusr/source-engine for your native arch

and after that you should add that printf to ./filesystem/basefilesystem.cpp, to dump all files that engine would access (textures/models that map needs)

FileHandle_t CBaseFileSystem::OpenForRead( const char *pFileNameT, const char *pOptions, unsigned flags, const char *pathID, char **ppszResolvedFilename )
{
	printf("OpenForRead %s %s\n", pFileNameT, pathID);
	VPROF( "CBaseFileSystem::OpenForRead" );

and lauch it via emscripten/get_logs.sh script, make sure to edit map list

after that, use emscripten/repackage.js script to make .data chunks

edit knownMaps and baseGamePath variables, make sure to unpack all .vpks