virtualx-engine/platform/javascript/os_javascript.cpp
Hein-Pieter van Braam 08f452d1a9 Fall back to GLES2 if GLES3 is not working
This adds a static is_viable() method to all rasterizers which has to be
called before initializing the rasterizer. This allows us to check what
rasterizer to use in OS::initialize together with the GL context
initialization.

This commit also adds a new project setting
"rendering/quality/driver/driver_fallback" which allows the creator of a
project to specify whether or not fallback to GLES2 is allowed. This
setting is ignored for the editor so the editor will always open even if
the project itself cannot run. This will hopefully reduce confusion for
users downloading projects from the internet.

We also no longer crash when GLES3 is not functioning on a platform.

This fixes #15324
2018-08-26 16:40:46 +02:00

1015 lines
30 KiB
C++

/*************************************************************************/
/* 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 "gles2/rasterizer_gles2.h"
#include "gles3/rasterizer_gles3.h"
#include "io/file_access_buffered_fa.h"
#include "main/main.h"
#include "servers/visual/visual_server_raster.h"
#include "unix/dir_access_unix.h"
#include "unix/file_access_unix.h"
#include <emscripten.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_size(p_size.x, p_size.y);
}
}
Size2 OS_JavaScript::get_window_size() const {
int canvas[3];
emscripten_get_canvas_size(canvas, canvas + 1, canvas + 2);
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;
}
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 const char *get_css_cursor() {
char cursor[16];
/* clang-format off */
EM_ASM_INT({
stringToUTF8(Module.canvas.style.cursor ? Module.canvas.style.cursor : 'auto', $0, 16);
}, cursor);
/* clang-format on */
return cursor;
}
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 (String::utf8(get_css_cursor()) == "none")
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_button_mask(input->get_mouse_button_mask());
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.
ev->set_pressed(true);
input->parse_input_event(ev);
ev->set_pressed(false);
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_get_gamepad_status(joypad, &state);
if (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 fulfil 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_size(windowed_size.width, windowed_size.height);
}
just_exited_fullscreen = false;
}
int canvas[3];
emscripten_get_canvas_size(canvas, canvas + 1, canvas + 2);
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
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 */
}
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);
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;
}