mirror of
https://github.com/OpenTTD/OpenTTD.git
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d15dc9f40f
Emscripten compiles to WASM, which can be loaded via HTML / JavaScript. This allows you to play OpenTTD inside a browser. Co-authored-by: milek7 <me@milek7.pl>
94 lines
3.6 KiB
JavaScript
94 lines
3.6 KiB
JavaScript
Module.arguments.push('-mnull', '-snull', '-vsdl:relative_mode');
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Module['websocket'] = { url: function(host, port, proto) {
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/* openttd.org hosts a WebSocket proxy for the content service. */
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if (host == "content.openttd.org" && port == 3978 && proto == "tcp") {
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return "wss://content.openttd.org/";
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}
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/* Everything else just tries to make a default WebSocket connection.
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* If you run your own server you can setup your own WebSocket proxy in
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* front of it and let people connect to your server via the proxy. You
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* are best to add another "if" statement as above for this. */
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return null;
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} };
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Module.preRun.push(function() {
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personal_dir = '/home/web_user/.openttd';
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content_download_dir = personal_dir + '/content_download'
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/* Because of the "-c" above, all user-data is stored in /user_data. */
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FS.mkdir(personal_dir);
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FS.mount(IDBFS, {}, personal_dir);
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Module.addRunDependency('syncfs');
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FS.syncfs(true, function (err) {
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/* FS.mkdir() tends to fail if parent folders do not exist. */
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if (!FS.analyzePath(content_download_dir).exists) {
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FS.mkdir(content_download_dir);
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}
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if (!FS.analyzePath(content_download_dir + '/baseset').exists) {
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FS.mkdir(content_download_dir + '/baseset');
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}
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/* Check if the OpenGFX baseset is already downloaded. */
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if (!FS.analyzePath(content_download_dir + '/baseset/opengfx-0.6.0.tar').exists) {
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window.openttd_downloaded_opengfx = true;
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FS.createPreloadedFile(content_download_dir + '/baseset', 'opengfx-0.6.0.tar', 'https://installer.cdn.openttd.org/emscripten/opengfx-0.6.0.tar', true, true);
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} else {
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/* Fake dependency increase, so the counter is stable. */
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Module.addRunDependency('opengfx');
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Module.removeRunDependency('opengfx');
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}
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Module.removeRunDependency('syncfs');
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});
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window.openttd_syncfs_shown_warning = false;
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window.openttd_syncfs = function() {
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/* Copy the virtual FS to the persistent storage. */
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FS.syncfs(false, function (err) { });
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/* On first time, warn the user about the volatile behaviour of
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* persistent storage. */
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if (!window.openttd_syncfs_shown_warning) {
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window.openttd_syncfs_shown_warning = true;
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Module.onWarningFs();
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}
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}
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window.openttd_exit = function() {
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Module.onExit();
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}
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window.openttd_abort = function() {
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Module.onAbort();
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}
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window.openttd_server_list = function() {
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add_server = Module.cwrap("em_openttd_add_server", null, ["string", "number"]);
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/* Add servers that support WebSocket here. Example:
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* add_server("localhost", 3979); */
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}
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/* https://github.com/emscripten-core/emscripten/pull/12995 implements this
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* properly. Till that time, we use a polyfill. */
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SOCKFS.websocket_sock_ops.createPeer_ = SOCKFS.websocket_sock_ops.createPeer;
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SOCKFS.websocket_sock_ops.createPeer = function(sock, addr, port)
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{
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let func = Module['websocket']['url'];
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Module['websocket']['url'] = func(addr, port, (sock.type == 2) ? 'udp' : 'tcp');
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let ret = SOCKFS.websocket_sock_ops.createPeer_(sock, addr, port);
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Module['websocket']['url'] = func;
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return ret;
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}
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});
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Module.postRun.push(function() {
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/* Check if we downloaded OpenGFX; if so, sync the virtual FS back to the
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* IDBFS so OpenGFX is stored persistent. */
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if (window['openttd_downloaded_opengfx']) {
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FS.syncfs(false, function (err) { });
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}
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});
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