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godot/platform/javascript/os_javascript.cpp

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/*************************************************************************/
/* os_javascript.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 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 "core/io/json.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"
#ifndef NO_THREADS
#include "servers/visual/visual_server_wrap_mt.h"
#endif
#include <emscripten.h>
#include <png.h>
#include <stdlib.h>
#include "dom_keys.inc"
#include "godot_js.h"
#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
// Quit
void OS_JavaScript::request_quit_callback() {
OS_JavaScript *os = get_singleton();
if (os && os->get_main_loop()) {
os->get_main_loop()->notification(MainLoop::NOTIFICATION_WM_QUIT_REQUEST);
}
}
// Files drop (implemented in JS for now).
void OS_JavaScript::drop_files_callback(char **p_filev, int p_filec) {
OS_JavaScript *os = get_singleton();
if (!os || !os->get_main_loop()) {
return;
}
Vector<String> files;
for (int i = 0; i < p_filec; i++) {
files.push_back(String::utf8(p_filev[i]));
}
os->get_main_loop()->drop_files(files);
}
void OS_JavaScript::send_notification_callback(int p_notification) {
OS_JavaScript *os = get_singleton();
if (!os) {
return;
}
if (p_notification == MainLoop::NOTIFICATION_WM_MOUSE_ENTER || p_notification == MainLoop::NOTIFICATION_WM_MOUSE_EXIT) {
os->cursor_inside_canvas = p_notification == MainLoop::NOTIFICATION_WM_MOUSE_ENTER;
}
MainLoop *loop = os->get_main_loop();
if (loop) {
loop->notification(p_notification);
}
}
// Window (canvas)
Point2 OS_JavaScript::compute_position_in_canvas(int x, int y) {
OS_JavaScript *os = get_singleton();
int canvas_x;
int canvas_y;
godot_js_display_canvas_bounding_rect_position_get(&canvas_x, &canvas_y);
int canvas_width;
int canvas_height;
emscripten_get_canvas_element_size(os->canvas_id, &canvas_width, &canvas_height);
double element_width;
double element_height;
emscripten_get_element_css_size(os->canvas_id, &element_width, &element_height);
return Point2((int)(canvas_width / element_width * (x - canvas_x)),
(int)(canvas_height / element_height * (y - canvas_y)));
}
bool OS_JavaScript::check_size_force_redraw() {
int canvas_width;
int canvas_height;
emscripten_get_canvas_element_size(canvas_id, &canvas_width, &canvas_height);
if (last_width != canvas_width || last_height != canvas_height) {
last_width = canvas_width;
last_height = canvas_height;
// Update the framebuffer size for redraw.
emscripten_set_canvas_element_size(canvas_id, canvas_width, canvas_height);
return true;
}
return false;
}
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 == String::utf8(os->canvas_id)) {
// 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;
}
double scale = godot_js_display_pixel_ratio_get();
emscripten_set_canvas_element_size(canvas_id, p_size.x * scale, p_size.y * scale);
emscripten_set_element_css_size(canvas_id, p_size.x, p_size.y);
}
}
Size2 OS_JavaScript::get_window_size() const {
int canvas[2];
emscripten_get_canvas_element_size(canvas_id, canvas, canvas + 1);
return Size2(canvas[0], canvas[1]);
}
void OS_JavaScript::set_window_maximized(bool p_enabled) {
#ifndef TOOLS_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(canvas_id, &strategy);
window_maximized = p_enabled;
}
#endif
}
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(canvas_id, false, &strategy);
ERR_FAIL_COND_MSG(result == EMSCRIPTEN_RESULT_FAILED_NOT_DEFERRED, "Enabling fullscreen is only possible from an input callback for the HTML5 platform.");
ERR_FAIL_COND_MSG(result != EMSCRIPTEN_RESULT_SUCCESS, "Enabling fullscreen is only possible from an input callback for the HTML5 platform.");
// 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));
}
bool OS_JavaScript::get_window_per_pixel_transparency_enabled() const {
if (!is_layered_allowed()) {
return false;
}
return transparency_enabled;
}
void OS_JavaScript::set_window_per_pixel_transparency_enabled(bool p_enabled) {
if (!is_layered_allowed()) {
return;
}
transparency_enabled = p_enabled;
}
// 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(dom_code2godot_scancode(emscripten_event->code, emscripten_event->key));
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);
// Resume audio context after input in case autoplay was denied.
os->resume_audio();
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(compute_position_in_canvas(p_event->clientX, p_event->clientY));
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()) {
double diff = emscripten_get_now() - 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.
godot_js_display_canvas_focus();
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);
// Resume audio context after input in case autoplay was denied.
os->resume_audio();
// 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 = compute_position_in_canvas(p_event->clientX, p_event->clientY);
// For motion outside the canvas, only read mouse movement if dragging
// started inside the canvas; imitating desktop app behaviour.
if (!os->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";
}
}
void OS_JavaScript::set_cursor_shape(CursorShape p_shape) {
ERR_FAIL_INDEX(p_shape, CURSOR_MAX);
if (cursor_shape == p_shape) {
return;
}
cursor_shape = p_shape;
godot_js_display_cursor_set_shape(godot2dom_cursor(cursor_shape));
}
void OS_JavaScript::set_custom_mouse_cursor(const RES &p_cursor, CursorShape p_shape, const Vector2 &p_hotspot) {
if (p_cursor.is_valid()) {
Ref<Texture> texture = p_cursor;
Ref<AtlasTexture> atlas_texture = p_cursor;
Ref<Image> image;
Size2 texture_size;
Rect2 atlas_rect;
if (texture.is_valid()) {
image = texture->get_data();
if (image.is_valid()) {
image->duplicate();
}
}
if (!image.is_valid() && atlas_texture.is_valid()) {
texture = atlas_texture->get_atlas();
atlas_rect.size.width = texture->get_width();
atlas_rect.size.height = texture->get_height();
atlas_rect.position.x = atlas_texture->get_region().position.x;
atlas_rect.position.y = atlas_texture->get_region().position.y;
texture_size.width = atlas_texture->get_region().size.x;
texture_size.height = atlas_texture->get_region().size.y;
} else if (image.is_valid()) {
texture_size.width = texture->get_width();
texture_size.height = texture->get_height();
}
ERR_FAIL_COND(!texture.is_valid());
ERR_FAIL_COND(p_hotspot.x < 0 || p_hotspot.y < 0);
ERR_FAIL_COND(texture_size.width > 256 || texture_size.height > 256);
ERR_FAIL_COND(p_hotspot.x > texture_size.width || p_hotspot.y > texture_size.height);
image = texture->get_data();
ERR_FAIL_COND(!image.is_valid());
image = image->duplicate();
if (atlas_texture.is_valid())
image->crop_from_point(
atlas_rect.position.x,
atlas_rect.position.y,
texture_size.width,
texture_size.height);
if (image->get_format() != Image::FORMAT_RGBA8) {
image->convert(Image::FORMAT_RGBA8);
}
png_image png_meta;
memset(&png_meta, 0, sizeof png_meta);
png_meta.version = PNG_IMAGE_VERSION;
png_meta.width = texture_size.width;
png_meta.height = texture_size.height;
png_meta.format = PNG_FORMAT_RGBA;
PoolByteArray png;
size_t len;
PoolByteArray::Read r = image->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();
godot_js_display_cursor_set_custom_shape(godot2dom_cursor(p_shape), r.ptr(), len, p_hotspot.x, p_hotspot.y);
r = PoolByteArray::Read();
} else {
godot_js_display_cursor_set_custom_shape(godot2dom_cursor(p_shape), NULL, 0, 0, 0);
}
}
void OS_JavaScript::set_mouse_mode(OS::MouseMode p_mode) {
ERR_FAIL_COND_MSG(p_mode == MOUSE_MODE_CONFINED, "MOUSE_MODE_CONFINED is not supported for the HTML5 platform.");
if (p_mode == get_mouse_mode())
return;
if (p_mode == MOUSE_MODE_VISIBLE) {
godot_js_display_cursor_set_visible(1);
emscripten_exit_pointerlock();
} else if (p_mode == MOUSE_MODE_HIDDEN) {
godot_js_display_cursor_set_visible(0);
emscripten_exit_pointerlock();
} else if (p_mode == MOUSE_MODE_CAPTURED) {
godot_js_display_cursor_set_visible(1);
EMSCRIPTEN_RESULT result = emscripten_request_pointerlock(canvas_id, false);
ERR_FAIL_COND_MSG(result == EMSCRIPTEN_RESULT_FAILED_NOT_DEFERRED, "MOUSE_MODE_CAPTURED can only be entered from within an appropriate input callback.");
ERR_FAIL_COND_MSG(result != EMSCRIPTEN_RESULT_SUCCESS, "MOUSE_MODE_CAPTURED can only be entered from within an appropriate input callback.");
}
}
OS::MouseMode OS_JavaScript::get_mouse_mode() const {
if (godot_js_display_cursor_is_hidden())
return MOUSE_MODE_HIDDEN;
EmscriptenPointerlockChangeEvent ev;
emscripten_get_pointerlock_status(&ev);
return (ev.isActive && String::utf8(ev.id) == String::utf8(canvas_id)) ? 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);
OS_JavaScript *os = get_singleton();
if (!godot_js_display_canvas_is_focused()) {
if (os->cursor_inside_canvas) {
godot_js_display_canvas_focus();
} else {
return false;
}
}
InputDefault *input = os->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 {
return godot_js_display_touchscreen_is_available();
}
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(compute_position_in_canvas(touch.clientX, touch.clientY));
os->touches[i] = ev->get_position();
ev->set_pressed(p_event_type == EMSCRIPTEN_EVENT_TOUCHSTART);
os->input->parse_input_event(ev);
}
// Resume audio context after input in case autoplay was denied.
os->resume_audio();
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(compute_position_in_canvas(touch.clientX, touch.clientY));
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_FAIL_V_MSG(NULL, "Invalid video driver index: " + itos(p_driver) + ".");
}
// 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";
}
// Clipboard
void OS_JavaScript::update_clipboard_callback(const char *p_text) {
// Only call set_clipboard from OS (sets local clipboard)
get_singleton()->OS::set_clipboard(p_text);
}
void OS_JavaScript::set_clipboard(const String &p_text) {
OS::set_clipboard(p_text);
int err = godot_js_display_clipboard_set(p_text.utf8().get_data());
ERR_FAIL_COND_MSG(err, "Clipboard API is not supported.");
}
String OS_JavaScript::get_clipboard() const {
godot_js_display_clipboard_get(update_clipboard_callback);
return this->OS::get_clipboard();
}
// 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) {
swap_ok_cancel = godot_js_display_is_swap_ok_cancel() == 1;
EmscriptenWebGLContextAttributes attributes;
emscripten_webgl_init_context_attributes(&attributes);
attributes.alpha = GLOBAL_GET("display/window/per_pixel_transparency/allowed");
attributes.antialias = false;
attributes.explicitSwapControl = true;
ERR_FAIL_INDEX_V(p_video_driver, VIDEO_DRIVER_MAX, ERR_INVALID_PARAMETER);
if (p_desired.layered) {
set_window_per_pixel_transparency_enabled(true);
}
#ifdef TOOLS_ENABLED
bool gles3 = false;
#else
bool gles3 = true;
if (p_video_driver == VIDEO_DRIVER_GLES2) {
gles3 = false;
}
#endif
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/fallback_to_gles2")) {
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;
}
}
}
webgl_ctx = emscripten_webgl_create_context(canvas_id, &attributes);
if (emscripten_webgl_make_context_current(webgl_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;
// fullscreen_change_callback will correct this if the request is successful.
video_mode.fullscreen = false;
// Emscripten only attempts fullscreen requests if the user input callback
// was registered through one its own functions, so request manually for
// start-up fullscreen.
if (p_desired.fullscreen) {
godot_js_display_window_request_fullscreen();
}
if (godot_js_config_is_resize_on_start()) {
set_window_size(Size2(video_mode.width, video_mode.height));
} else {
set_window_size(get_window_size());
}
AudioDriverManager::initialize(p_audio_driver);
visual_server = memnew(VisualServerRaster());
#ifndef NO_THREADS
visual_server = memnew(VisualServerWrapMT(visual_server, false));
#endif
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_WINDOW_CALLBACK(ev, cb) \
result = emscripten_set_##ev##_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, NULL, false, &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.
SET_EM_CALLBACK(canvas_id, mousedown, mouse_button_callback)
SET_EM_WINDOW_CALLBACK(mousemove, mousemove_callback)
SET_EM_WINDOW_CALLBACK(mouseup, mouse_button_callback)
SET_EM_CALLBACK(canvas_id, wheel, wheel_callback)
SET_EM_CALLBACK(canvas_id, touchstart, touch_press_callback)
SET_EM_CALLBACK(canvas_id, touchmove, touchmove_callback)
SET_EM_CALLBACK(canvas_id, touchend, touch_press_callback)
SET_EM_CALLBACK(canvas_id, touchcancel, touch_press_callback)
SET_EM_CALLBACK(canvas_id, keydown, keydown_callback)
SET_EM_CALLBACK(canvas_id, keypress, keypress_callback)
SET_EM_CALLBACK(canvas_id, keyup, keyup_callback)
SET_EM_CALLBACK(EMSCRIPTEN_EVENT_TARGET_DOCUMENT, fullscreenchange, fullscreen_change_callback)
SET_EM_CALLBACK_NOTARGET(gamepadconnected, gamepad_change_callback)
SET_EM_CALLBACK_NOTARGET(gamepaddisconnected, gamepad_change_callback)
#undef SET_EM_CALLBACK_NOTARGET
#undef SET_EM_CALLBACK
#undef EM_CHECK
// For APIs that are not (sufficiently) exposed, a
// library is used below (implemented in library_godot_display.js).
godot_js_display_notification_cb(&OS_JavaScript::send_notification_callback,
MainLoop::NOTIFICATION_WM_MOUSE_ENTER,
MainLoop::NOTIFICATION_WM_MOUSE_EXIT,
MainLoop::NOTIFICATION_WM_FOCUS_IN,
MainLoop::NOTIFICATION_WM_FOCUS_OUT);
godot_js_display_paste_cb(&OS_JavaScript::update_clipboard_callback);
godot_js_display_drop_files_cb(&OS_JavaScript::drop_files_callback);
visual_server->init();
return OK;
}
bool OS_JavaScript::get_swap_ok_cancel() {
return swap_ok_cancel;
}
void OS_JavaScript::swap_buffers() {
emscripten_webgl_commit_frame();
}
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::resume_audio() {
if (audio_driver_javascript) {
audio_driver_javascript->resume();
}
}
void OS_JavaScript::fs_sync_callback() {
get_singleton()->idb_is_syncing = false;
}
bool OS_JavaScript::main_loop_iterate() {
if (is_userfs_persistent() && idb_needs_sync && !idb_is_syncing) {
idb_is_syncing = true;
idb_needs_sync = false;
godot_js_os_fs_sync(&OS_JavaScript::fs_sync_callback);
}
if (emscripten_sample_gamepad_data() == EMSCRIPTEN_RESULT_SUCCESS)
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(canvas_id, &strategy);
} else {
set_window_size(Size2(windowed_size.width, windowed_size.height));
}
just_exited_fullscreen = false;
}
int canvas[2];
emscripten_get_canvas_element_size(canvas_id, 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);
main_loop = NULL;
}
void OS_JavaScript::finalize() {
memdelete(input);
visual_server->finish();
emscripten_webgl_commit_frame();
memdelete(visual_server);
emscripten_webgl_destroy_context(webgl_ctx);
if (audio_driver_javascript) {
memdelete(audio_driver_javascript);
}
}
// 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, Mutex *p_pipe_mutex) {
Array args;
for (const List<String>::Element *E = p_arguments.front(); E; E = E->next()) {
args.push_back(E->get());
}
String json_args = JSON::print(args);
int failed = godot_js_os_execute(json_args.utf8().get_data());
ERR_FAIL_COND_V_MSG(failed, ERR_UNAVAILABLE, "OS::execute() must be implemented in Javascript via 'engine.setOnExecute' if required.");
return OK;
}
Error OS_JavaScript::kill(const ProcessID &p_pid) {
ERR_FAIL_V_MSG(ERR_UNAVAILABLE, "OS::kill() is not available on the HTML5 platform.");
}
int OS_JavaScript::get_process_id() const {
ERR_FAIL_V_MSG(0, "OS::get_process_id() is not available on the HTML5 platform.");
}
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
return false;
}
void OS_JavaScript::alert(const String &p_alert, const String &p_title) {
godot_js_display_alert(p_alert.utf8().get_data());
}
void OS_JavaScript::set_window_title(const String &p_title) {
godot_js_display_window_title_set(p_title.utf8().get_data());
}
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();
godot_js_display_window_icon_set(r.ptr(), len);
}
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.
godot_js_os_shell_open(p_uri.utf8().get_data());
return OK;
}
String OS_JavaScript::get_name() const {
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_cache_path() const {
return "/home/web_user/.cache";
}
String OS_JavaScript::get_config_path() const {
return "/home/web_user/.config";
}
String OS_JavaScript::get_data_path() const {
return "/home/web_user/.local/share";
}
OS::PowerState OS_JavaScript::get_power_state() {
WARN_PRINT_ONCE("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_ONCE("Power management is not supported for the HTML5 platform, defaulting to -1");
return -1;
}
int OS_JavaScript::get_power_percent_left() {
WARN_PRINT_ONCE("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_flags & FileAccess::WRITE)) {
return; // FS persistence is not working or we are not writing.
}
bool is_file_persistent = p_file.begins_with("/userfs");
#ifdef TOOLS_ENABLED
// Hack for editor persistence (can we track).
is_file_persistent = is_file_persistent || p_file.begins_with("/home/web_user/");
#endif
if (is_file_persistent) {
os->idb_needs_sync = true;
}
}
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() {
// Expose method for requesting quit.
godot_js_os_request_quit_cb(&request_quit_callback);
// Set canvas ID
godot_js_config_canvas_id_get(canvas_id, sizeof(canvas_id));
cursor_inside_canvas = true;
cursor_shape = OS::CURSOR_ARROW;
last_click_button_index = -1;
last_click_ms = 0;
last_click_pos = Point2(-100, -100);
last_width = 0;
last_height = 0;
window_maximized = false;
entering_fullscreen = false;
just_exited_fullscreen = false;
transparency_enabled = false;
main_loop = NULL;
visual_server = NULL;
audio_driver_javascript = NULL;
swap_ok_cancel = false;
idb_available = godot_js_os_fs_is_persistent() != 0;
idb_needs_sync = false;
idb_is_syncing = false;
if (AudioDriverJavaScript::is_available()) {
audio_driver_javascript = memnew(AudioDriverJavaScript);
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;
}
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