/*************************************************************************/ /* os_javascript.cpp */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md) */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /*************************************************************************/ #include "os_javascript.h" #include "core/io/file_access_buffered_fa.h" #include "drivers/gles2/rasterizer_gles2.h" #include "drivers/gles3/rasterizer_gles3.h" #include "drivers/unix/dir_access_unix.h" #include "drivers/unix/file_access_unix.h" #include "main/main.h" #include "servers/visual/visual_server_raster.h" #include <emscripten.h> #include <png.h> #include <stdlib.h> #include "dom_keys.inc" #define DOM_BUTTON_LEFT 0 #define DOM_BUTTON_MIDDLE 1 #define DOM_BUTTON_RIGHT 2 #define DOM_BUTTON_XBUTTON1 3 #define DOM_BUTTON_XBUTTON2 4 // Window (canvas) static void focus_canvas() { /* clang-format off */ EM_ASM( Module.canvas.focus(); ); /* clang-format on */ } static bool is_canvas_focused() { /* clang-format off */ return EM_ASM_INT_V( return document.activeElement == Module.canvas; ); /* clang-format on */ } static bool cursor_inside_canvas = true; EM_BOOL OS_JavaScript::fullscreen_change_callback(int p_event_type, const EmscriptenFullscreenChangeEvent *p_event, void *p_user_data) { OS_JavaScript *os = get_singleton(); // Empty ID is canvas. String target_id = String::utf8(p_event->id); if (target_id.empty() || target_id == "canvas") { // This event property is the only reliable data on // browser fullscreen state. os->video_mode.fullscreen = p_event->isFullscreen; if (os->video_mode.fullscreen) { os->entering_fullscreen = false; } else { // Restoring maximized window now will cause issues, // so delay until main_loop_iterate. os->just_exited_fullscreen = true; } } return false; } void OS_JavaScript::set_video_mode(const VideoMode &p_video_mode, int p_screen) { video_mode = p_video_mode; } OS::VideoMode OS_JavaScript::get_video_mode(int p_screen) const { return video_mode; } Size2 OS_JavaScript::get_screen_size(int p_screen) const { EmscriptenFullscreenChangeEvent ev; EMSCRIPTEN_RESULT result = emscripten_get_fullscreen_status(&ev); ERR_FAIL_COND_V(result != EMSCRIPTEN_RESULT_SUCCESS, Size2()); return Size2(ev.screenWidth, ev.screenHeight); } void OS_JavaScript::set_window_size(const Size2 p_size) { windowed_size = p_size; if (video_mode.fullscreen) { window_maximized = false; set_window_fullscreen(false); } else { if (window_maximized) { emscripten_exit_soft_fullscreen(); window_maximized = false; } emscripten_set_canvas_element_size(NULL, p_size.x, p_size.y); } } Size2 OS_JavaScript::get_window_size() const { int canvas[2]; emscripten_get_canvas_element_size(NULL, canvas, canvas + 1); return Size2(canvas[0], canvas[1]); } void OS_JavaScript::set_window_maximized(bool p_enabled) { if (video_mode.fullscreen) { window_maximized = p_enabled; set_window_fullscreen(false); } else if (!p_enabled) { emscripten_exit_soft_fullscreen(); window_maximized = false; } else if (!window_maximized) { // Prevent calling emscripten_enter_soft_fullscreen mutltiple times, // this would hide page elements permanently. EmscriptenFullscreenStrategy strategy; strategy.scaleMode = EMSCRIPTEN_FULLSCREEN_SCALE_STRETCH; strategy.canvasResolutionScaleMode = EMSCRIPTEN_FULLSCREEN_CANVAS_SCALE_STDDEF; strategy.filteringMode = EMSCRIPTEN_FULLSCREEN_FILTERING_DEFAULT; strategy.canvasResizedCallback = NULL; emscripten_enter_soft_fullscreen(NULL, &strategy); window_maximized = p_enabled; } } bool OS_JavaScript::is_window_maximized() const { return window_maximized; } void OS_JavaScript::set_window_fullscreen(bool p_enabled) { if (p_enabled == video_mode.fullscreen) { return; } // Just request changes here, if successful, logic continues in // fullscreen_change_callback. if (p_enabled) { if (window_maximized) { // Soft fullsreen during real fullscreen can cause issues, so exit. // This must be called before requesting full screen. emscripten_exit_soft_fullscreen(); } EmscriptenFullscreenStrategy strategy; strategy.scaleMode = EMSCRIPTEN_FULLSCREEN_SCALE_STRETCH; strategy.canvasResolutionScaleMode = EMSCRIPTEN_FULLSCREEN_CANVAS_SCALE_STDDEF; strategy.filteringMode = EMSCRIPTEN_FULLSCREEN_FILTERING_DEFAULT; strategy.canvasResizedCallback = NULL; EMSCRIPTEN_RESULT result = emscripten_request_fullscreen_strategy(NULL, false, &strategy); ERR_EXPLAIN("Enabling fullscreen is only possible from an input callback for the HTML5 platform"); ERR_FAIL_COND(result == EMSCRIPTEN_RESULT_FAILED_NOT_DEFERRED); ERR_FAIL_COND(result != EMSCRIPTEN_RESULT_SUCCESS); // Not fullscreen yet, so prevent "windowed" canvas dimensions from // being overwritten. entering_fullscreen = true; } else { // No logic allowed here, since exiting w/ ESC key won't use this function. ERR_FAIL_COND(emscripten_exit_fullscreen() != EMSCRIPTEN_RESULT_SUCCESS); } } bool OS_JavaScript::is_window_fullscreen() const { return video_mode.fullscreen; } void OS_JavaScript::get_fullscreen_mode_list(List<VideoMode> *p_list, int p_screen) const { Size2 screen = get_screen_size(); p_list->push_back(OS::VideoMode(screen.width, screen.height, true)); } // Keys template <typename T> static void dom2godot_mod(T *emscripten_event_ptr, Ref<InputEventWithModifiers> godot_event) { godot_event->set_shift(emscripten_event_ptr->shiftKey); godot_event->set_alt(emscripten_event_ptr->altKey); godot_event->set_control(emscripten_event_ptr->ctrlKey); godot_event->set_metakey(emscripten_event_ptr->metaKey); } static Ref<InputEventKey> setup_key_event(const EmscriptenKeyboardEvent *emscripten_event) { Ref<InputEventKey> ev; ev.instance(); ev->set_echo(emscripten_event->repeat); dom2godot_mod(emscripten_event, ev); ev->set_scancode(dom2godot_scancode(emscripten_event->keyCode)); String unicode = String::utf8(emscripten_event->key); // Check if empty or multi-character (e.g. `CapsLock`). if (unicode.length() != 1) { // Might be empty as well, but better than nonsense. unicode = String::utf8(emscripten_event->charValue); } if (unicode.length() == 1) { ev->set_unicode(unicode[0]); } return ev; } EM_BOOL OS_JavaScript::keydown_callback(int p_event_type, const EmscriptenKeyboardEvent *p_event, void *p_user_data) { OS_JavaScript *os = get_singleton(); Ref<InputEventKey> ev = setup_key_event(p_event); ev->set_pressed(true); if (ev->get_unicode() == 0 && keycode_has_unicode(ev->get_scancode())) { // Defer to keypress event for legacy unicode retrieval. os->deferred_key_event = ev; // Do not suppress keypress event. return false; } os->input->parse_input_event(ev); return true; } EM_BOOL OS_JavaScript::keypress_callback(int p_event_type, const EmscriptenKeyboardEvent *p_event, void *p_user_data) { OS_JavaScript *os = get_singleton(); os->deferred_key_event->set_unicode(p_event->charCode); os->input->parse_input_event(os->deferred_key_event); return true; } EM_BOOL OS_JavaScript::keyup_callback(int p_event_type, const EmscriptenKeyboardEvent *p_event, void *p_user_data) { Ref<InputEventKey> ev = setup_key_event(p_event); ev->set_pressed(false); get_singleton()->input->parse_input_event(ev); return ev->get_scancode() != KEY_UNKNOWN && ev->get_scancode() != 0; } // Mouse Point2 OS_JavaScript::get_mouse_position() const { return input->get_mouse_position(); } int OS_JavaScript::get_mouse_button_state() const { return input->get_mouse_button_mask(); } EM_BOOL OS_JavaScript::mouse_button_callback(int p_event_type, const EmscriptenMouseEvent *p_event, void *p_user_data) { OS_JavaScript *os = get_singleton(); Ref<InputEventMouseButton> ev; ev.instance(); ev->set_pressed(p_event_type == EMSCRIPTEN_EVENT_MOUSEDOWN); ev->set_position(Point2(p_event->canvasX, p_event->canvasY)); ev->set_global_position(ev->get_position()); dom2godot_mod(p_event, ev); switch (p_event->button) { case DOM_BUTTON_LEFT: ev->set_button_index(BUTTON_LEFT); break; case DOM_BUTTON_MIDDLE: ev->set_button_index(BUTTON_MIDDLE); break; case DOM_BUTTON_RIGHT: ev->set_button_index(BUTTON_RIGHT); break; case DOM_BUTTON_XBUTTON1: ev->set_button_index(BUTTON_XBUTTON1); break; case DOM_BUTTON_XBUTTON2: ev->set_button_index(BUTTON_XBUTTON2); break; default: return false; } if (ev->is_pressed()) { uint64_t diff = p_event->timestamp - os->last_click_ms; if (ev->get_button_index() == os->last_click_button_index) { if (diff < 400 && Point2(os->last_click_pos).distance_to(ev->get_position()) < 5) { os->last_click_ms = 0; os->last_click_pos = Point2(-100, -100); os->last_click_button_index = -1; ev->set_doubleclick(true); } } else { os->last_click_button_index = ev->get_button_index(); } if (!ev->is_doubleclick()) { os->last_click_ms += diff; os->last_click_pos = ev->get_position(); } } int mask = os->input->get_mouse_button_mask(); int button_flag = 1 << (ev->get_button_index() - 1); if (ev->is_pressed()) { // Since the event is consumed, focus manually. The containing iframe, // if exists, may not have focus yet, so focus even if already focused. focus_canvas(); mask |= button_flag; } else if (mask & button_flag) { mask &= ~button_flag; } else { // Received release event, but press was outside the canvas, so ignore. return false; } ev->set_button_mask(mask); os->input->parse_input_event(ev); // Prevent multi-click text selection and wheel-click scrolling anchor. // Context menu is prevented through contextmenu event. return true; } EM_BOOL OS_JavaScript::mousemove_callback(int p_event_type, const EmscriptenMouseEvent *p_event, void *p_user_data) { OS_JavaScript *os = get_singleton(); int input_mask = os->input->get_mouse_button_mask(); Point2 pos = Point2(p_event->canvasX, p_event->canvasY); // For motion outside the canvas, only read mouse movement if dragging // started inside the canvas; imitating desktop app behaviour. if (!cursor_inside_canvas && !input_mask) return false; Ref<InputEventMouseMotion> ev; ev.instance(); dom2godot_mod(p_event, ev); ev->set_button_mask(input_mask); ev->set_position(pos); ev->set_global_position(ev->get_position()); ev->set_relative(Vector2(p_event->movementX, p_event->movementY)); os->input->set_mouse_position(ev->get_position()); ev->set_speed(os->input->get_last_mouse_speed()); os->input->parse_input_event(ev); // Don't suppress mouseover/-leave events. return false; } static const char *godot2dom_cursor(OS::CursorShape p_shape) { switch (p_shape) { case OS::CURSOR_ARROW: default: return "auto"; case OS::CURSOR_IBEAM: return "text"; case OS::CURSOR_POINTING_HAND: return "pointer"; case OS::CURSOR_CROSS: return "crosshair"; case OS::CURSOR_WAIT: return "progress"; case OS::CURSOR_BUSY: return "wait"; case OS::CURSOR_DRAG: return "grab"; case OS::CURSOR_CAN_DROP: return "grabbing"; case OS::CURSOR_FORBIDDEN: return "no-drop"; case OS::CURSOR_VSIZE: return "ns-resize"; case OS::CURSOR_HSIZE: return "ew-resize"; case OS::CURSOR_BDIAGSIZE: return "nesw-resize"; case OS::CURSOR_FDIAGSIZE: return "nwse-resize"; case OS::CURSOR_MOVE: return "move"; case OS::CURSOR_VSPLIT: return "row-resize"; case OS::CURSOR_HSPLIT: return "col-resize"; case OS::CURSOR_HELP: return "help"; } } static void set_css_cursor(const char *p_cursor) { /* clang-format off */ EM_ASM_({ Module.canvas.style.cursor = UTF8ToString($0); }, p_cursor); /* clang-format on */ } static bool is_css_cursor_hidden() { /* clang-format off */ return EM_ASM_INT({ return Module.canvas.style.cursor === 'none'; }); /* clang-format on */ } void OS_JavaScript::set_cursor_shape(CursorShape p_shape) { ERR_FAIL_INDEX(p_shape, CURSOR_MAX); cursor_shape = p_shape; if (get_mouse_mode() != MOUSE_MODE_HIDDEN) set_css_cursor(godot2dom_cursor(cursor_shape)); } void OS_JavaScript::set_custom_mouse_cursor(const RES &p_cursor, CursorShape p_shape, const Vector2 &p_hotspot) { } void OS_JavaScript::set_mouse_mode(OS::MouseMode p_mode) { ERR_EXPLAIN("MOUSE_MODE_CONFINED is not supported for the HTML5 platform"); ERR_FAIL_COND(p_mode == MOUSE_MODE_CONFINED); if (p_mode == get_mouse_mode()) return; if (p_mode == MOUSE_MODE_VISIBLE) { set_css_cursor(godot2dom_cursor(cursor_shape)); emscripten_exit_pointerlock(); } else if (p_mode == MOUSE_MODE_HIDDEN) { set_css_cursor("none"); emscripten_exit_pointerlock(); } else if (p_mode == MOUSE_MODE_CAPTURED) { EMSCRIPTEN_RESULT result = emscripten_request_pointerlock("canvas", false); ERR_EXPLAIN("MOUSE_MODE_CAPTURED can only be entered from within an appropriate input callback"); ERR_FAIL_COND(result == EMSCRIPTEN_RESULT_FAILED_NOT_DEFERRED); ERR_FAIL_COND(result != EMSCRIPTEN_RESULT_SUCCESS); set_css_cursor(godot2dom_cursor(cursor_shape)); } } OS::MouseMode OS_JavaScript::get_mouse_mode() const { if (is_css_cursor_hidden()) return MOUSE_MODE_HIDDEN; EmscriptenPointerlockChangeEvent ev; emscripten_get_pointerlock_status(&ev); return (ev.isActive && String::utf8(ev.id) == "canvas") ? MOUSE_MODE_CAPTURED : MOUSE_MODE_VISIBLE; } // Wheel EM_BOOL OS_JavaScript::wheel_callback(int p_event_type, const EmscriptenWheelEvent *p_event, void *p_user_data) { ERR_FAIL_COND_V(p_event_type != EMSCRIPTEN_EVENT_WHEEL, false); if (!is_canvas_focused()) { if (cursor_inside_canvas) { focus_canvas(); } else { return false; } } InputDefault *input = get_singleton()->input; Ref<InputEventMouseButton> ev; ev.instance(); ev->set_position(input->get_mouse_position()); ev->set_global_position(ev->get_position()); ev->set_shift(input->is_key_pressed(KEY_SHIFT)); ev->set_alt(input->is_key_pressed(KEY_ALT)); ev->set_control(input->is_key_pressed(KEY_CONTROL)); ev->set_metakey(input->is_key_pressed(KEY_META)); if (p_event->deltaY < 0) ev->set_button_index(BUTTON_WHEEL_UP); else if (p_event->deltaY > 0) ev->set_button_index(BUTTON_WHEEL_DOWN); else if (p_event->deltaX > 0) ev->set_button_index(BUTTON_WHEEL_LEFT); else if (p_event->deltaX < 0) ev->set_button_index(BUTTON_WHEEL_RIGHT); else return false; // Different browsers give wildly different delta values, and we can't // interpret deltaMode, so use default value for wheel events' factor. int button_flag = 1 << (ev->get_button_index() - 1); ev->set_pressed(true); ev->set_button_mask(input->get_mouse_button_mask() | button_flag); input->parse_input_event(ev); ev->set_pressed(false); ev->set_button_mask(input->get_mouse_button_mask() & ~button_flag); input->parse_input_event(ev); return true; } // Touch bool OS_JavaScript::has_touchscreen_ui_hint() const { /* clang-format off */ return EM_ASM_INT_V( return 'ontouchstart' in window; ); /* clang-format on */ } EM_BOOL OS_JavaScript::touch_press_callback(int p_event_type, const EmscriptenTouchEvent *p_event, void *p_user_data) { OS_JavaScript *os = get_singleton(); Ref<InputEventScreenTouch> ev; ev.instance(); int lowest_id_index = -1; for (int i = 0; i < p_event->numTouches; ++i) { const EmscriptenTouchPoint &touch = p_event->touches[i]; if (lowest_id_index == -1 || touch.identifier < p_event->touches[lowest_id_index].identifier) lowest_id_index = i; if (!touch.isChanged) continue; ev->set_index(touch.identifier); ev->set_position(Point2(touch.canvasX, touch.canvasY)); os->touches[i] = ev->get_position(); ev->set_pressed(p_event_type == EMSCRIPTEN_EVENT_TOUCHSTART); os->input->parse_input_event(ev); } return true; } EM_BOOL OS_JavaScript::touchmove_callback(int p_event_type, const EmscriptenTouchEvent *p_event, void *p_user_data) { OS_JavaScript *os = get_singleton(); Ref<InputEventScreenDrag> ev; ev.instance(); int lowest_id_index = -1; for (int i = 0; i < p_event->numTouches; ++i) { const EmscriptenTouchPoint &touch = p_event->touches[i]; if (lowest_id_index == -1 || touch.identifier < p_event->touches[lowest_id_index].identifier) lowest_id_index = i; if (!touch.isChanged) continue; ev->set_index(touch.identifier); ev->set_position(Point2(touch.canvasX, touch.canvasY)); Point2 &prev = os->touches[i]; ev->set_relative(ev->get_position() - prev); prev = ev->get_position(); os->input->parse_input_event(ev); } return true; } // Gamepad EM_BOOL OS_JavaScript::gamepad_change_callback(int p_event_type, const EmscriptenGamepadEvent *p_event, void *p_user_data) { InputDefault *input = get_singleton()->input; if (p_event_type == EMSCRIPTEN_EVENT_GAMEPADCONNECTED) { String guid = ""; if (String::utf8(p_event->mapping) == "standard") guid = "Default HTML5 Gamepad"; input->joy_connection_changed(p_event->index, true, String::utf8(p_event->id), guid); } else { input->joy_connection_changed(p_event->index, false, ""); } return true; } void OS_JavaScript::process_joypads() { int joypad_count = emscripten_get_num_gamepads(); for (int joypad = 0; joypad < joypad_count; joypad++) { EmscriptenGamepadEvent state; EMSCRIPTEN_RESULT query_result = emscripten_get_gamepad_status(joypad, &state); // Chromium reserves gamepads slots, so NO_DATA is an expected result. ERR_CONTINUE(query_result != EMSCRIPTEN_RESULT_SUCCESS && query_result != EMSCRIPTEN_RESULT_NO_DATA); if (query_result == EMSCRIPTEN_RESULT_SUCCESS && state.connected) { int button_count = MIN(state.numButtons, 18); int axis_count = MIN(state.numAxes, 8); for (int button = 0; button < button_count; button++) { float value = state.analogButton[button]; if (String::utf8(state.mapping) == "standard" && (button == JOY_ANALOG_L2 || button == JOY_ANALOG_R2)) { InputDefault::JoyAxis joy_axis; joy_axis.min = 0; joy_axis.value = value; input->joy_axis(joypad, button, joy_axis); } else { input->joy_button(joypad, button, value); } } for (int axis = 0; axis < axis_count; axis++) { InputDefault::JoyAxis joy_axis; joy_axis.min = -1; joy_axis.value = state.axis[axis]; input->joy_axis(joypad, axis, joy_axis); } } } } bool OS_JavaScript::is_joy_known(int p_device) { return input->is_joy_mapped(p_device); } String OS_JavaScript::get_joy_guid(int p_device) const { return input->get_joy_guid_remapped(p_device); } // Video int OS_JavaScript::get_video_driver_count() const { return VIDEO_DRIVER_MAX; } const char *OS_JavaScript::get_video_driver_name(int p_driver) const { switch (p_driver) { case VIDEO_DRIVER_GLES3: return "GLES3"; case VIDEO_DRIVER_GLES2: return "GLES2"; } ERR_EXPLAIN("Invalid video driver index " + itos(p_driver)); ERR_FAIL_V(NULL); } // Audio int OS_JavaScript::get_audio_driver_count() const { return 1; } const char *OS_JavaScript::get_audio_driver_name(int p_driver) const { return "JavaScript"; } // Lifecycle int OS_JavaScript::get_current_video_driver() const { return video_driver_index; } void OS_JavaScript::initialize_core() { OS_Unix::initialize_core(); FileAccess::make_default<FileAccessBufferedFA<FileAccessUnix> >(FileAccess::ACCESS_RESOURCES); } Error OS_JavaScript::initialize(const VideoMode &p_desired, int p_video_driver, int p_audio_driver) { EmscriptenWebGLContextAttributes attributes; emscripten_webgl_init_context_attributes(&attributes); attributes.alpha = false; attributes.antialias = false; ERR_FAIL_INDEX_V(p_video_driver, VIDEO_DRIVER_MAX, ERR_INVALID_PARAMETER); bool gles3 = true; if (p_video_driver == VIDEO_DRIVER_GLES2) { gles3 = false; } bool gl_initialization_error = false; while (true) { if (gles3) { if (RasterizerGLES3::is_viable() == OK) { attributes.majorVersion = 2; RasterizerGLES3::register_config(); RasterizerGLES3::make_current(); break; } else { if (GLOBAL_GET("rendering/quality/driver/driver_fallback") == "Best") { p_video_driver = VIDEO_DRIVER_GLES2; gles3 = false; continue; } else { gl_initialization_error = true; break; } } } else { if (RasterizerGLES2::is_viable() == OK) { attributes.majorVersion = 1; RasterizerGLES2::register_config(); RasterizerGLES2::make_current(); break; } else { gl_initialization_error = true; break; } } } EMSCRIPTEN_WEBGL_CONTEXT_HANDLE ctx = emscripten_webgl_create_context(NULL, &attributes); if (emscripten_webgl_make_context_current(ctx) != EMSCRIPTEN_RESULT_SUCCESS) { gl_initialization_error = true; } if (gl_initialization_error) { OS::get_singleton()->alert("Your browser does not support any of the supported WebGL versions.\n" "Please update your browser version.", "Unable to initialize Video driver"); return ERR_UNAVAILABLE; } video_driver_index = p_video_driver; video_mode = p_desired; // Can't fulfill fullscreen request during start-up due to browser security. video_mode.fullscreen = false; /* clang-format off */ if (EM_ASM_INT_V({ return Module.resizeCanvasOnStart })) { /* clang-format on */ set_window_size(Size2(video_mode.width, video_mode.height)); } else { set_window_size(get_window_size()); } char locale_ptr[16]; /* clang-format off */ EM_ASM_ARGS({ stringToUTF8(Module.locale, $0, 16); }, locale_ptr); /* clang-format on */ setenv("LANG", locale_ptr, true); AudioDriverManager::initialize(p_audio_driver); VisualServer *visual_server = memnew(VisualServerRaster()); input = memnew(InputDefault); EMSCRIPTEN_RESULT result; #define EM_CHECK(ev) \ if (result != EMSCRIPTEN_RESULT_SUCCESS) \ ERR_PRINTS("Error while setting " #ev " callback: Code " + itos(result)) #define SET_EM_CALLBACK(target, ev, cb) \ result = emscripten_set_##ev##_callback(target, NULL, true, &cb); \ EM_CHECK(ev) #define SET_EM_CALLBACK_NOTARGET(ev, cb) \ result = emscripten_set_##ev##_callback(NULL, true, &cb); \ EM_CHECK(ev) // These callbacks from Emscripten's html5.h suffice to access most // JavaScript APIs. For APIs that are not (sufficiently) exposed, EM_ASM // is used below. SET_EM_CALLBACK("#window", mousemove, mousemove_callback) SET_EM_CALLBACK("#canvas", mousedown, mouse_button_callback) SET_EM_CALLBACK("#window", mouseup, mouse_button_callback) SET_EM_CALLBACK("#window", wheel, wheel_callback) SET_EM_CALLBACK("#window", touchstart, touch_press_callback) SET_EM_CALLBACK("#window", touchmove, touchmove_callback) SET_EM_CALLBACK("#window", touchend, touch_press_callback) SET_EM_CALLBACK("#window", touchcancel, touch_press_callback) SET_EM_CALLBACK("#canvas", keydown, keydown_callback) SET_EM_CALLBACK("#canvas", keypress, keypress_callback) SET_EM_CALLBACK("#canvas", keyup, keyup_callback) SET_EM_CALLBACK(NULL, fullscreenchange, fullscreen_change_callback) SET_EM_CALLBACK_NOTARGET(gamepadconnected, gamepad_change_callback) SET_EM_CALLBACK_NOTARGET(gamepaddisconnected, gamepad_change_callback) #undef SET_EM_CALLBACK_NODATA #undef SET_EM_CALLBACK #undef EM_CHECK /* clang-format off */ EM_ASM_ARGS({ const send_notification = cwrap('send_notification', null, ['number']); const notifications = arguments; (['mouseover', 'mouseleave', 'focus', 'blur']).forEach(function(event, index) { Module.canvas.addEventListener(event, send_notification.bind(null, notifications[index])); }); }, MainLoop::NOTIFICATION_WM_MOUSE_ENTER, MainLoop::NOTIFICATION_WM_MOUSE_EXIT, MainLoop::NOTIFICATION_WM_FOCUS_IN, MainLoop::NOTIFICATION_WM_FOCUS_OUT ); /* clang-format on */ visual_server->init(); return OK; } void OS_JavaScript::set_main_loop(MainLoop *p_main_loop) { main_loop = p_main_loop; input->set_main_loop(p_main_loop); } MainLoop *OS_JavaScript::get_main_loop() const { return main_loop; } void OS_JavaScript::run_async() { main_loop->init(); emscripten_set_main_loop(main_loop_callback, -1, false); } void OS_JavaScript::main_loop_callback() { get_singleton()->main_loop_iterate(); } bool OS_JavaScript::main_loop_iterate() { if (is_userfs_persistent() && sync_wait_time >= 0) { int64_t current_time = get_ticks_msec(); int64_t elapsed_time = current_time - last_sync_check_time; last_sync_check_time = current_time; sync_wait_time -= elapsed_time; if (sync_wait_time < 0) { /* clang-format off */ EM_ASM( FS.syncfs(function(err) { if (err) { console.warn('Failed to save IDB file system: ' + err.message); } }); ); /* clang-format on */ } } process_joypads(); if (just_exited_fullscreen) { if (window_maximized) { EmscriptenFullscreenStrategy strategy; strategy.scaleMode = EMSCRIPTEN_FULLSCREEN_SCALE_STRETCH; strategy.canvasResolutionScaleMode = EMSCRIPTEN_FULLSCREEN_CANVAS_SCALE_STDDEF; strategy.filteringMode = EMSCRIPTEN_FULLSCREEN_FILTERING_DEFAULT; strategy.canvasResizedCallback = NULL; emscripten_enter_soft_fullscreen(NULL, &strategy); } else { emscripten_set_canvas_element_size(NULL, windowed_size.width, windowed_size.height); } just_exited_fullscreen = false; } int canvas[2]; emscripten_get_canvas_element_size(NULL, canvas, canvas + 1); video_mode.width = canvas[0]; video_mode.height = canvas[1]; if (!window_maximized && !video_mode.fullscreen && !just_exited_fullscreen && !entering_fullscreen) { windowed_size.width = canvas[0]; windowed_size.height = canvas[1]; } return Main::iteration(); } void OS_JavaScript::delete_main_loop() { memdelete(main_loop); } void OS_JavaScript::finalize() { memdelete(input); } // Miscellaneous Error OS_JavaScript::execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id, String *r_pipe, int *r_exitcode, bool read_stderr) { ERR_EXPLAIN("OS::execute() is not available on the HTML5 platform"); ERR_FAIL_V(ERR_UNAVAILABLE); } Error OS_JavaScript::kill(const ProcessID &p_pid) { ERR_EXPLAIN("OS::kill() is not available on the HTML5 platform"); ERR_FAIL_V(ERR_UNAVAILABLE); } int OS_JavaScript::get_process_id() const { ERR_EXPLAIN("OS::get_process_id() is not available on the HTML5 platform"); ERR_FAIL_V(0); } extern "C" EMSCRIPTEN_KEEPALIVE void send_notification(int p_notification) { if (p_notification == MainLoop::NOTIFICATION_WM_MOUSE_ENTER || p_notification == MainLoop::NOTIFICATION_WM_MOUSE_EXIT) { cursor_inside_canvas = p_notification == MainLoop::NOTIFICATION_WM_MOUSE_ENTER; } OS_JavaScript::get_singleton()->get_main_loop()->notification(p_notification); } bool OS_JavaScript::_check_internal_feature_support(const String &p_feature) { if (p_feature == "HTML5" || p_feature == "web") return true; #ifdef JAVASCRIPT_EVAL_ENABLED if (p_feature == "JavaScript") return true; #endif EMSCRIPTEN_WEBGL_CONTEXT_HANDLE ctx = emscripten_webgl_get_current_context(); // All extensions are already automatically enabled, this function allows // checking WebGL extension support without inline JavaScript if (p_feature == "s3tc") return emscripten_webgl_enable_extension(ctx, "WEBGL_compressed_texture_s3tc_srgb"); if (p_feature == "etc") return emscripten_webgl_enable_extension(ctx, "WEBGL_compressed_texture_etc1"); if (p_feature == "etc2") return emscripten_webgl_enable_extension(ctx, "WEBGL_compressed_texture_etc"); return false; } void OS_JavaScript::alert(const String &p_alert, const String &p_title) { /* clang-format off */ EM_ASM_({ window.alert(UTF8ToString($0)); }, p_alert.utf8().get_data()); /* clang-format on */ } void OS_JavaScript::set_window_title(const String &p_title) { /* clang-format off */ EM_ASM_({ document.title = UTF8ToString($0); }, p_title.utf8().get_data()); /* clang-format on */ } void OS_JavaScript::set_icon(const Ref<Image> &p_icon) { ERR_FAIL_COND(p_icon.is_null()); Ref<Image> icon = p_icon; if (icon->is_compressed()) { icon = icon->duplicate(); ERR_FAIL_COND(icon->decompress() != OK) } if (icon->get_format() != Image::FORMAT_RGBA8) { if (icon == p_icon) icon = icon->duplicate(); icon->convert(Image::FORMAT_RGBA8); } png_image png_meta; memset(&png_meta, 0, sizeof png_meta); png_meta.version = PNG_IMAGE_VERSION; png_meta.width = icon->get_width(); png_meta.height = icon->get_height(); png_meta.format = PNG_FORMAT_RGBA; PoolByteArray png; size_t len; PoolByteArray::Read r = icon->get_data().read(); ERR_FAIL_COND(!png_image_write_get_memory_size(png_meta, len, 0, r.ptr(), 0, NULL)); png.resize(len); PoolByteArray::Write w = png.write(); ERR_FAIL_COND(!png_image_write_to_memory(&png_meta, w.ptr(), &len, 0, r.ptr(), 0, NULL)); w = PoolByteArray::Write(); r = png.read(); /* clang-format off */ EM_ASM_ARGS({ var PNG_PTR = $0; var PNG_LEN = $1; var png = new Blob([HEAPU8.slice(PNG_PTR, PNG_PTR + PNG_LEN)], { type: "image/png" }); var url = URL.createObjectURL(png); var link = document.getElementById('-gd-engine-icon'); if (link === null) { link = document.createElement('link'); link.rel = 'icon'; link.id = '-gd-engine-icon'; document.head.appendChild(link); } link.href = url; }, r.ptr(), len); /* clang-format on */ } String OS_JavaScript::get_executable_path() const { return OS::get_executable_path(); } Error OS_JavaScript::shell_open(String p_uri) { // Open URI in a new tab, browser will deal with it by protocol. /* clang-format off */ EM_ASM_({ window.open(UTF8ToString($0), '_blank'); }, p_uri.utf8().get_data()); /* clang-format on */ return OK; } String OS_JavaScript::get_name() { return "HTML5"; } bool OS_JavaScript::can_draw() const { return true; // Always? } String OS_JavaScript::get_user_data_dir() const { return "/userfs"; }; String OS_JavaScript::get_resource_dir() const { return "/"; } OS::PowerState OS_JavaScript::get_power_state() { WARN_PRINT("Power management is not supported for the HTML5 platform, defaulting to POWERSTATE_UNKNOWN"); return OS::POWERSTATE_UNKNOWN; } int OS_JavaScript::get_power_seconds_left() { WARN_PRINT("Power management is not supported for the HTML5 platform, defaulting to -1"); return -1; } int OS_JavaScript::get_power_percent_left() { WARN_PRINT("Power management is not supported for the HTML5 platform, defaulting to -1"); return -1; } void OS_JavaScript::file_access_close_callback(const String &p_file, int p_flags) { OS_JavaScript *os = get_singleton(); if (os->is_userfs_persistent() && p_file.begins_with("/userfs") && p_flags & FileAccess::WRITE) { os->last_sync_check_time = OS::get_singleton()->get_ticks_msec(); // Wait five seconds in case more files are about to be closed. os->sync_wait_time = 5000; } } void OS_JavaScript::set_idb_available(bool p_idb_available) { idb_available = p_idb_available; } bool OS_JavaScript::is_userfs_persistent() const { return idb_available; } OS_JavaScript *OS_JavaScript::get_singleton() { return static_cast<OS_JavaScript *>(OS::get_singleton()); } OS_JavaScript::OS_JavaScript(int p_argc, char *p_argv[]) { List<String> arguments; for (int i = 1; i < p_argc; i++) { arguments.push_back(String::utf8(p_argv[i])); } set_cmdline(p_argv[0], arguments); last_click_button_index = -1; last_click_ms = 0; last_click_pos = Point2(-100, -100); window_maximized = false; entering_fullscreen = false; just_exited_fullscreen = false; main_loop = NULL; idb_available = false; sync_wait_time = -1; AudioDriverManager::add_driver(&audio_driver_javascript); Vector<Logger *> loggers; loggers.push_back(memnew(StdLogger)); _set_logger(memnew(CompositeLogger(loggers))); FileAccessUnix::close_notification_func = file_access_close_callback; }