135 lines
5.2 KiB
C++
135 lines
5.2 KiB
C++
/*************************************************************************/
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/* javascript_main.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "core/io/resource_loader.h"
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#include "main/main.h"
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#include "platform/javascript/display_server_javascript.h"
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#include "platform/javascript/os_javascript.h"
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#include <emscripten/emscripten.h>
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static OS_JavaScript *os = nullptr;
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void exit_callback() {
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emscripten_cancel_main_loop(); // After this, we can exit!
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Main::cleanup();
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int exit_code = OS_JavaScript::get_singleton()->get_exit_code();
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memdelete(os);
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os = nullptr;
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emscripten_force_exit(exit_code); // No matter that we call cancel_main_loop, regular "exit" will not work, forcing.
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}
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void main_loop_callback() {
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bool force_draw = DisplayServerJavaScript::get_singleton()->check_size_force_redraw();
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if (force_draw) {
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Main::force_redraw();
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}
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if (os->main_loop_iterate()) {
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emscripten_cancel_main_loop(); // Cancel current loop and wait for finalize_async.
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EM_ASM({
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// This will contain the list of operations that need to complete before cleanup.
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Module.async_finish = [];
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});
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os->get_main_loop()->finish();
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os->finalize_async(); // Will add all the async finish functions.
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EM_ASM({
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Promise.all(Module.async_finish).then(function() {
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Module.async_finish = [];
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ccall("cleanup_after_sync", null, []);
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});
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});
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}
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}
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extern "C" EMSCRIPTEN_KEEPALIVE void cleanup_after_sync() {
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emscripten_set_main_loop(exit_callback, -1, false);
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}
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extern "C" EMSCRIPTEN_KEEPALIVE void main_after_fs_sync(char *p_idbfs_err) {
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String idbfs_err = String::utf8(p_idbfs_err);
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if (!idbfs_err.empty()) {
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print_line("IndexedDB not available: " + idbfs_err);
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}
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os->set_idb_available(idbfs_err.empty());
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// TODO: Check error return value.
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Main::setup2(); // Manual second phase.
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// Ease up compatibility.
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ResourceLoader::set_abort_on_missing_resources(false);
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Main::start();
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os->get_main_loop()->init();
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// Immediately run the first iteration.
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// We are inside an animation frame, we want to immediately draw on the newly setup canvas.
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main_loop_callback();
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emscripten_resume_main_loop();
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}
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int main(int argc, char *argv[]) {
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// Create and mount userfs immediately.
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EM_ASM({
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FS.mkdir('/userfs');
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FS.mount(IDBFS, {}, '/userfs');
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});
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// Configure locale.
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char locale_ptr[16];
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/* clang-format off */
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EM_ASM({
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stringToUTF8(Module['locale'], $0, 16);
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}, locale_ptr);
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/* clang-format on */
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setenv("LANG", locale_ptr, true);
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// Ensure the canvas ID.
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/* clang-format off */
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EM_ASM({
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stringToUTF8("#" + Module['canvas'].id, $0, 255);
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}, DisplayServerJavaScript::canvas_id);
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/* clang-format on */
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os = new OS_JavaScript();
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Main::setup(argv[0], argc - 1, &argv[1], false);
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emscripten_set_main_loop(main_loop_callback, -1, false);
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emscripten_pause_main_loop(); // Will need to wait for FS sync.
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// Sync from persistent state into memory and then
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// run the 'main_after_fs_sync' function.
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/* clang-format off */
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EM_ASM({
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FS.syncfs(true, function(err) {
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requestAnimationFrame(function() {
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ccall('main_after_fs_sync', null, ['string'], [err ? err.message : ""]);
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});
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});
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});
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/* clang-format on */
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return 0;
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// Continued async in main_after_fs_sync() from the syncfs() callback.
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}
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