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virtualx-engine/platform/javascript/os_javascript.h
Fabio Alessandrelli 2024200182 [HTML5] Refactor audio drivers. Implement AudioWorklet w/o threads. 
Performances are not great in general, bad on Firefox, on Chrome, well,
it's an improvement compared to the way they broke ScriptProcessorNode.

I'm actually surprised this works, it involves so many allocations, but
there's no way around it when SharedArrayBuffer is not available :(.
2021-09-20 14:53:27 +02:00

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/*************************************************************************/
/* os_javascript.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 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. */
/*************************************************************************/
#ifndef OS_JAVASCRIPT_H
#define OS_JAVASCRIPT_H
#include "audio_driver_javascript.h"
#include "drivers/unix/os_unix.h"
#include "main/input_default.h"
#include "servers/audio_server.h"
#include "servers/visual/rasterizer.h"
#include <emscripten/html5.h>
class OS_JavaScript : public OS_Unix {
private:
VideoMode video_mode;
bool window_maximized;
bool entering_fullscreen;
bool just_exited_fullscreen;
bool transparency_enabled;
EMSCRIPTEN_WEBGL_CONTEXT_HANDLE webgl_ctx;
InputDefault *input;
Ref<InputEventKey> deferred_key_event;
CursorShape cursor_shape;
Point2 touches[32];
char canvas_id[256];
bool cursor_inside_canvas;
Point2i last_click_pos;
double last_click_ms;
int last_click_button_index;
MainLoop *main_loop;
int video_driver_index;
List<AudioDriverJavaScript *> audio_drivers;
VisualServer *visual_server;
bool swap_ok_cancel;
bool idb_available;
bool idb_needs_sync;
bool idb_is_syncing;
static Point2 compute_position_in_canvas(int x, int y);
static EM_BOOL fullscreen_change_callback(int p_event_type, const EmscriptenFullscreenChangeEvent *p_event, void *p_user_data);
static EM_BOOL keydown_callback(int p_event_type, const EmscriptenKeyboardEvent *p_event, void *p_user_data);
static EM_BOOL keypress_callback(int p_event_type, const EmscriptenKeyboardEvent *p_event, void *p_user_data);
static EM_BOOL keyup_callback(int p_event_type, const EmscriptenKeyboardEvent *p_event, void *p_user_data);
static EM_BOOL mousemove_callback(int p_event_type, const EmscriptenMouseEvent *p_event, void *p_user_data);
static EM_BOOL mouse_button_callback(int p_event_type, const EmscriptenMouseEvent *p_event, void *p_user_data);
static EM_BOOL wheel_callback(int p_event_type, const EmscriptenWheelEvent *p_event, void *p_user_data);
static EM_BOOL touch_press_callback(int p_event_type, const EmscriptenTouchEvent *p_event, void *p_user_data);
static EM_BOOL touchmove_callback(int p_event_type, const EmscriptenTouchEvent *p_event, void *p_user_data);
static void gamepad_callback(int p_index, int p_connected, const char *p_id, const char *p_guid);
static void input_text_callback(const char *p_text, int p_cursor);
void process_joypads();
static void file_access_close_callback(const String &p_file, int p_flags);
static void request_quit_callback();
static void drop_files_callback(char **p_filev, int p_filec);
static void send_notification_callback(int p_notification);
static void fs_sync_callback();
static void update_clipboard_callback(const char *p_text);
protected:
void resume_audio();
virtual int get_current_video_driver() const;
virtual void initialize_core();
virtual Error initialize(const VideoMode &p_desired, int p_video_driver, int p_audio_driver);
virtual void set_main_loop(MainLoop *p_main_loop);
virtual void delete_main_loop();
virtual void finalize();
virtual bool _check_internal_feature_support(const String &p_feature);
public:
bool check_size_force_redraw();
// Override return type to make writing static callbacks less tedious.
static OS_JavaScript *get_singleton();
virtual bool has_virtual_keyboard() const;
virtual void show_virtual_keyboard(const String &p_existing_text, const Rect2 &p_screen_rect = Rect2(), bool p_multiline = false, int p_max_input_length = -1, int p_cursor_start = -1, int p_cursor_end = -1);
virtual void hide_virtual_keyboard();
virtual bool get_swap_ok_cancel();
virtual void swap_buffers();
virtual void set_video_mode(const VideoMode &p_video_mode, int p_screen = 0);
virtual VideoMode get_video_mode(int p_screen = 0) const;
virtual void get_fullscreen_mode_list(List<VideoMode> *p_list, int p_screen = 0) const;
virtual void set_window_size(const Size2);
virtual Size2 get_window_size() const;
virtual void set_window_maximized(bool p_enabled);
virtual bool is_window_maximized() const;
virtual void set_window_fullscreen(bool p_enabled);
virtual bool is_window_fullscreen() const;
virtual Size2 get_screen_size(int p_screen = -1) const;
virtual int get_screen_dpi(int p_screen = -1) const;
virtual float get_screen_scale(int p_screen = -1) const;
virtual float get_screen_max_scale() const;
virtual Point2 get_mouse_position() const;
virtual int get_mouse_button_state() const;
virtual void set_cursor_shape(CursorShape p_shape);
virtual void set_custom_mouse_cursor(const RES &p_cursor, CursorShape p_shape, const Vector2 &p_hotspot);
virtual void set_mouse_mode(MouseMode p_mode);
virtual MouseMode get_mouse_mode() const;
virtual bool get_window_per_pixel_transparency_enabled() const;
virtual void set_window_per_pixel_transparency_enabled(bool p_enabled);
virtual bool has_touchscreen_ui_hint() const;
virtual bool is_joy_known(int p_device);
virtual String get_joy_guid(int p_device) const;
virtual int get_video_driver_count() const;
virtual const char *get_video_driver_name(int p_driver) const;
virtual int get_audio_driver_count() const;
virtual const char *get_audio_driver_name(int p_driver) const;
virtual void set_clipboard(const String &p_text);
virtual String get_clipboard() const;
virtual MainLoop *get_main_loop() const;
bool main_loop_iterate();
virtual Error execute(const String &p_path, const List<String> &p_arguments, bool p_blocking = true, ProcessID *r_child_id = NULL, String *r_pipe = NULL, int *r_exitcode = NULL, bool read_stderr = false, Mutex *p_pipe_mutex = NULL);
virtual Error kill(const ProcessID &p_pid);
virtual int get_process_id() const;
int get_processor_count() const;
virtual void alert(const String &p_alert, const String &p_title = "ALERT!");
virtual void set_window_title(const String &p_title);
virtual void set_icon(const Ref<Image> &p_icon);
String get_executable_path() const;
virtual Error shell_open(String p_uri);
virtual String get_name() const;
virtual void add_frame_delay(bool p_can_draw) {}
virtual bool can_draw() const;
virtual String get_cache_path() const;
virtual String get_config_path() const;
virtual String get_data_path() const;
virtual String get_user_data_dir() const;
virtual OS::PowerState get_power_state();
virtual int get_power_seconds_left();
virtual int get_power_percent_left();
virtual bool is_userfs_persistent() const;
Error open_dynamic_library(const String p_path, void *&p_library_handle, bool p_also_set_library_path);
OS_JavaScript();
};
#endif
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