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godot/platform/android/os_android.cpp
Pedro J. Estébanez de9d40a953 Implement universal translation of touch to mouse 
Now generating mouse events from touch is optional (on by default) and it's performed by `InputDefault` instead of having each OS abstraction doing it. (*)

The translation algorithm waits for a touch index to be pressed and tracks it translating its events to mouse events until it is raised, while ignoring other pointers.

Furthermore, to avoid an stuck "touch mouse", since not all platforms may report touches raised when the window is unfocused, it checks if touches are still down by the time it's focused again and if so it resets the state of the emulated mouse.

*: In the case of Windows, since it already provides touch-to-mouse translation by itself, "echo" mouse events are filtered out to have it working like the rest.

On X11 a little hack has been needed to avoid a case of a spurious mouse motion event that is generated during touch interaction.

Plus: Improve/fix tracking of current mouse position.

** Summary of changes to settings: **

- `display/window/handheld/emulate_touchscreen` becomes `input/pointing_devices/emulate_touch_from_mouse`
- New setting: `input/pointing_devices/emulate_mouse_from_touch`
2018-04-30 19:03:38 +02:00

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/*************************************************************************/
/* os_android.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_android.h"
#include "core/io/file_access_buffered_fa.h"
#include "core/project_settings.h"
#include "drivers/gles3/rasterizer_gles3.h"
#include "drivers/unix/dir_access_unix.h"
#include "drivers/unix/file_access_unix.h"
#include "file_access_android.h"
#include "main/main.h"
#include "servers/visual/visual_server_raster.h"
//#include "servers/visual/visual_server_wrap_mt.h"
#ifdef ANDROID_NATIVE_ACTIVITY
#include "dir_access_android.h"
#include "file_access_android.h"
#else
#include "dir_access_jandroid.h"
#include "file_access_jandroid.h"
#endif
#include <dlfcn.h>
class AndroidLogger : public Logger {
public:
virtual void logv(const char *p_format, va_list p_list, bool p_err) {
__android_log_vprint(p_err ? ANDROID_LOG_ERROR : ANDROID_LOG_INFO, "godot", p_format, p_list);
}
virtual ~AndroidLogger() {}
};
int OS_Android::get_video_driver_count() const {
return 1;
}
const char *OS_Android::get_video_driver_name(int p_driver) const {
return "GLES2";
}
int OS_Android::get_audio_driver_count() const {
return 1;
}
const char *OS_Android::get_audio_driver_name(int p_driver) const {
return "Android";
}
void OS_Android::initialize_core() {
OS_Unix::initialize_core();
#ifdef ANDROID_NATIVE_ACTIVITY
FileAccess::make_default<FileAccessAndroid>(FileAccess::ACCESS_RESOURCES);
FileAccess::make_default<FileAccessUnix>(FileAccess::ACCESS_USERDATA);
FileAccess::make_default<FileAccessUnix>(FileAccess::ACCESS_FILESYSTEM);
//FileAccessBufferedFA<FileAccessUnix>::make_default();
DirAccess::make_default<DirAccessAndroid>(DirAccess::ACCESS_RESOURCES);
DirAccess::make_default<DirAccessUnix>(DirAccess::ACCESS_USERDATA);
DirAccess::make_default<DirAccessUnix>(DirAccess::ACCESS_FILESYSTEM);
#else
if (use_apk_expansion)
FileAccess::make_default<FileAccessUnix>(FileAccess::ACCESS_RESOURCES);
else {
#ifdef USE_JAVA_FILE_ACCESS
FileAccess::make_default<FileAccessBufferedFA<FileAccessJAndroid> >(FileAccess::ACCESS_RESOURCES);
#else
//FileAccess::make_default<FileAccessBufferedFA<FileAccessAndroid> >(FileAccess::ACCESS_RESOURCES);
FileAccess::make_default<FileAccessAndroid>(FileAccess::ACCESS_RESOURCES);
#endif
}
FileAccess::make_default<FileAccessUnix>(FileAccess::ACCESS_USERDATA);
FileAccess::make_default<FileAccessUnix>(FileAccess::ACCESS_FILESYSTEM);
//FileAccessBufferedFA<FileAccessUnix>::make_default();
if (use_apk_expansion)
DirAccess::make_default<DirAccessUnix>(DirAccess::ACCESS_RESOURCES);
else
DirAccess::make_default<DirAccessJAndroid>(DirAccess::ACCESS_RESOURCES);
DirAccess::make_default<DirAccessUnix>(DirAccess::ACCESS_USERDATA);
DirAccess::make_default<DirAccessUnix>(DirAccess::ACCESS_FILESYSTEM);
#endif
}
void OS_Android::set_opengl_extensions(const char *p_gl_extensions) {
ERR_FAIL_COND(!p_gl_extensions);
gl_extensions = p_gl_extensions;
}
Error OS_Android::initialize(const VideoMode &p_desired, int p_video_driver, int p_audio_driver) {
use_gl2 = p_video_driver != 1;
if (gfx_init_func)
gfx_init_func(gfx_init_ud, use_gl2);
RasterizerGLES3::register_config();
RasterizerGLES3::make_current();
visual_server = memnew(VisualServerRaster);
/* if (get_render_thread_mode() != RENDER_THREAD_UNSAFE) {
visual_server = memnew(VisualServerWrapMT(visual_server, false));
};*/
visual_server->init();
// visual_server->cursor_set_visible(false, 0);
AudioDriverManager::initialize(p_audio_driver);
input = memnew(InputDefault);
input->set_fallback_mapping("Default Android Gamepad");
//power_manager = memnew(power_android);
return OK;
}
void OS_Android::set_main_loop(MainLoop *p_main_loop) {
main_loop = p_main_loop;
input->set_main_loop(p_main_loop);
}
void OS_Android::delete_main_loop() {
memdelete(main_loop);
}
void OS_Android::finalize() {
memdelete(input);
}
void OS_Android::alert(const String &p_alert, const String &p_title) {
//print("ALERT: %s\n", p_alert.utf8().get_data());
if (alert_func)
alert_func(p_alert, p_title);
}
Error OS_Android::open_dynamic_library(const String p_path, void *&p_library_handle, bool p_also_set_library_path) {
p_library_handle = dlopen(p_path.utf8().get_data(), RTLD_NOW);
if (!p_library_handle) {
ERR_EXPLAIN("Can't open dynamic library: " + p_path + ". Error: " + dlerror());
ERR_FAIL_V(ERR_CANT_OPEN);
}
return OK;
}
void OS_Android::set_mouse_show(bool p_show) {
//android has no mouse...
}
void OS_Android::set_mouse_grab(bool p_grab) {
//it really has no mouse...!
}
bool OS_Android::is_mouse_grab_enabled() const {
//*sigh* technology has evolved so much since i was a kid..
return false;
}
Point2 OS_Android::get_mouse_position() const {
return Point2();
}
int OS_Android::get_mouse_button_state() const {
return 0;
}
void OS_Android::set_window_title(const String &p_title) {
}
//interesting byt not yet
//void set_clipboard(const String& p_text);
//String get_clipboard() const;
void OS_Android::set_video_mode(const VideoMode &p_video_mode, int p_screen) {
}
OS::VideoMode OS_Android::get_video_mode(int p_screen) const {
return default_videomode;
}
void OS_Android::get_fullscreen_mode_list(List<VideoMode> *p_list, int p_screen) const {
p_list->push_back(default_videomode);
}
void OS_Android::set_keep_screen_on(bool p_enabled) {
OS::set_keep_screen_on(p_enabled);
if (set_keep_screen_on_func) {
set_keep_screen_on_func(p_enabled);
}
}
Size2 OS_Android::get_window_size() const {
return Vector2(default_videomode.width, default_videomode.height);
}
String OS_Android::get_name() {
return "Android";
}
MainLoop *OS_Android::get_main_loop() const {
return main_loop;
}
bool OS_Android::can_draw() const {
return true; //always?
}
void OS_Android::set_cursor_shape(CursorShape p_shape) {
//android really really really has no mouse.. how amazing..
}
void OS_Android::set_custom_mouse_cursor(const RES &p_cursor, CursorShape p_shape, const Vector2 &p_hotspot) {
}
void OS_Android::main_loop_begin() {
if (main_loop)
main_loop->init();
}
bool OS_Android::main_loop_iterate() {
if (!main_loop)
return false;
return Main::iteration();
}
void OS_Android::main_loop_end() {
if (main_loop)
main_loop->finish();
}
void OS_Android::main_loop_focusout() {
if (main_loop)
main_loop->notification(MainLoop::NOTIFICATION_WM_FOCUS_OUT);
audio_driver_android.set_pause(true);
}
void OS_Android::main_loop_focusin() {
if (main_loop)
main_loop->notification(MainLoop::NOTIFICATION_WM_FOCUS_IN);
audio_driver_android.set_pause(false);
}
void OS_Android::process_joy_event(OS_Android::JoypadEvent p_event) {
switch (p_event.type) {
case JOY_EVENT_BUTTON:
input->joy_button(p_event.device, p_event.index, p_event.pressed);
break;
case JOY_EVENT_AXIS:
InputDefault::JoyAxis value;
value.min = -1;
value.value = p_event.value;
input->joy_axis(p_event.device, p_event.index, value);
break;
case JOY_EVENT_HAT:
input->joy_hat(p_event.device, p_event.hat);
break;
default:
return;
}
}
void OS_Android::process_event(Ref<InputEvent> p_event) {
input->parse_input_event(p_event);
}
void OS_Android::process_touch(int p_what, int p_pointer, const Vector<TouchPos> &p_points) {
//print_line("ev: "+itos(p_what)+" pnt: "+itos(p_pointer)+" pointc: "+itos(p_points.size()));
switch (p_what) {
case 0: { //gesture begin
if (touch.size()) {
//end all if exist
for (int i = 0; i < touch.size(); i++) {
Ref<InputEventScreenTouch> ev;
ev.instance();
ev->set_index(touch[i].id);
ev->set_pressed(false);
ev->set_position(touch[i].pos);
input->parse_input_event(ev);
}
}
touch.resize(p_points.size());
for (int i = 0; i < p_points.size(); i++) {
touch[i].id = p_points[i].id;
touch[i].pos = p_points[i].pos;
}
//send touch
for (int i = 0; i < touch.size(); i++) {
Ref<InputEventScreenTouch> ev;
ev.instance();
ev->set_index(touch[i].id);
ev->set_pressed(true);
ev->set_position(touch[i].pos);
input->parse_input_event(ev);
}
} break;
case 1: { //motion
ERR_FAIL_COND(touch.size() != p_points.size());
for (int i = 0; i < touch.size(); i++) {
int idx = -1;
for (int j = 0; j < p_points.size(); j++) {
if (touch[i].id == p_points[j].id) {
idx = j;
break;
}
}
ERR_CONTINUE(idx == -1);
if (touch[i].pos == p_points[idx].pos)
continue; //no move unncesearily
Ref<InputEventScreenDrag> ev;
ev.instance();
ev->set_index(touch[i].id);
ev->set_position(p_points[idx].pos);
ev->set_relative(p_points[idx].pos - touch[i].pos);
input->parse_input_event(ev);
touch[i].pos = p_points[idx].pos;
}
} break;
case 2: { //release
if (touch.size()) {
//end all if exist
for (int i = 0; i < touch.size(); i++) {
Ref<InputEventScreenTouch> ev;
ev.instance();
ev->set_index(touch[i].id);
ev->set_pressed(false);
ev->set_position(touch[i].pos);
input->parse_input_event(ev);
}
touch.clear();
}
} break;
case 3: { // add touch
for (int i = 0; i < p_points.size(); i++) {
if (p_points[i].id == p_pointer) {
TouchPos tp = p_points[i];
touch.push_back(tp);
Ref<InputEventScreenTouch> ev;
ev.instance();
ev->set_index(tp.id);
ev->set_pressed(true);
ev->set_position(tp.pos);
input->parse_input_event(ev);
break;
}
}
} break;
case 4: { // remove touch
for (int i = 0; i < touch.size(); i++) {
if (touch[i].id == p_pointer) {
Ref<InputEventScreenTouch> ev;
ev.instance();
ev->set_index(touch[i].id);
ev->set_pressed(false);
ev->set_position(touch[i].pos);
input->parse_input_event(ev);
touch.remove(i);
break;
}
}
} break;
}
}
void OS_Android::process_accelerometer(const Vector3 &p_accelerometer) {
input->set_accelerometer(p_accelerometer);
}
void OS_Android::process_gravity(const Vector3 &p_gravity) {
input->set_gravity(p_gravity);
}
void OS_Android::process_magnetometer(const Vector3 &p_magnetometer) {
input->set_magnetometer(p_magnetometer);
}
void OS_Android::process_gyroscope(const Vector3 &p_gyroscope) {
input->set_gyroscope(p_gyroscope);
}
bool OS_Android::has_touchscreen_ui_hint() const {
return true;
}
bool OS_Android::has_virtual_keyboard() const {
return true;
}
int OS_Android::get_virtual_keyboard_height() const {
if (get_virtual_keyboard_height_func) {
return get_virtual_keyboard_height_func();
}
ERR_PRINT("Cannot obtain virtual keyboard height.");
return 0;
}
void OS_Android::show_virtual_keyboard(const String &p_existing_text, const Rect2 &p_screen_rect) {
if (show_virtual_keyboard_func) {
show_virtual_keyboard_func(p_existing_text);
} else {
ERR_PRINT("Virtual keyboard not available");
};
}
void OS_Android::hide_virtual_keyboard() {
if (hide_virtual_keyboard_func) {
hide_virtual_keyboard_func();
} else {
ERR_PRINT("Virtual keyboard not available");
};
}
void OS_Android::init_video_mode(int p_video_width, int p_video_height) {
default_videomode.width = p_video_width;
default_videomode.height = p_video_height;
default_videomode.fullscreen = true;
default_videomode.resizable = false;
}
void OS_Android::main_loop_request_go_back() {
if (main_loop)
main_loop->notification(MainLoop::NOTIFICATION_WM_GO_BACK_REQUEST);
}
void OS_Android::set_display_size(Size2 p_size) {
default_videomode.width = p_size.x;
default_videomode.height = p_size.y;
}
void OS_Android::reload_gfx() {
if (gfx_init_func)
gfx_init_func(gfx_init_ud, use_gl2);
//if (rasterizer)
// rasterizer->reload_vram();
}
Error OS_Android::shell_open(String p_uri) {
if (open_uri_func)
return open_uri_func(p_uri) ? ERR_CANT_OPEN : OK;
return ERR_UNAVAILABLE;
}
String OS_Android::get_resource_dir() const {
return "/"; //android has it's own filesystem for resources inside the APK
}
String OS_Android::get_locale() const {
if (get_locale_func)
return get_locale_func();
return OS_Unix::get_locale();
}
String OS_Android::get_model_name() const {
if (get_model_func)
return get_model_func();
return OS_Unix::get_model_name();
}
int OS_Android::get_screen_dpi(int p_screen) const {
if (get_screen_dpi_func) {
return get_screen_dpi_func();
}
return 160;
}
void OS_Android::set_need_reload_hooks(bool p_needs_them) {
use_reload_hooks = p_needs_them;
}
String OS_Android::get_user_data_dir() const {
if (data_dir_cache != String())
return data_dir_cache;
if (get_user_data_dir_func) {
String data_dir = get_user_data_dir_func();
//store current dir
char real_current_dir_name[2048];
getcwd(real_current_dir_name, 2048);
//go to data dir
chdir(data_dir.utf8().get_data());
//get actual data dir, so we resolve potential symlink (Android 6.0+ seems to use symlink)
char data_current_dir_name[2048];
getcwd(data_current_dir_name, 2048);
//cache by parsing utf8
data_dir_cache.parse_utf8(data_current_dir_name);
//restore original dir so we don't mess things up
chdir(real_current_dir_name);
return data_dir_cache;
}
return ".";
}
void OS_Android::set_screen_orientation(ScreenOrientation p_orientation) {
if (set_screen_orientation_func)
set_screen_orientation_func(p_orientation);
}
String OS_Android::get_unique_id() const {
if (get_unique_id_func)
return get_unique_id_func();
return OS::get_unique_id();
}
Error OS_Android::native_video_play(String p_path, float p_volume) {
if (video_play_func)
video_play_func(p_path);
return OK;
}
bool OS_Android::native_video_is_playing() {
if (video_is_playing_func)
return video_is_playing_func();
return false;
}
void OS_Android::native_video_pause() {
if (video_pause_func)
video_pause_func();
}
String OS_Android::get_system_dir(SystemDir p_dir) const {
if (get_system_dir_func)
return get_system_dir_func(p_dir);
return String(".");
}
void OS_Android::native_video_stop() {
if (video_stop_func)
video_stop_func();
}
void OS_Android::set_context_is_16_bits(bool p_is_16) {
//use_16bits_fbo = p_is_16;
//if (rasterizer)
// rasterizer->set_force_16_bits_fbo(p_is_16);
}
void OS_Android::joy_connection_changed(int p_device, bool p_connected, String p_name) {
return input->joy_connection_changed(p_device, p_connected, p_name, "");
}
bool OS_Android::is_joy_known(int p_device) {
return input->is_joy_mapped(p_device);
}
String OS_Android::get_joy_guid(int p_device) const {
return input->get_joy_guid_remapped(p_device);
}
bool OS_Android::_check_internal_feature_support(const String &p_feature) {
if (p_feature == "mobile" || p_feature == "etc" || p_feature == "etc2") {
//TODO support etc2 only if GLES3 driver is selected
return true;
}
#if defined(__aarch64__)
if (p_feature == "arm64-v8a") {
return true;
}
#elif defined(__ARM_ARCH_7A__)
if (p_feature == "armeabi-v7a" || p_feature == "armeabi") {
return true;
}
#elif defined(__arm__)
if (p_feature == "armeabi") {
return true;
}
#endif
return false;
}
OS_Android::OS_Android(GFXInitFunc p_gfx_init_func, void *p_gfx_init_ud, OpenURIFunc p_open_uri_func, GetUserDataDirFunc p_get_user_data_dir_func, GetLocaleFunc p_get_locale_func, GetModelFunc p_get_model_func, GetScreenDPIFunc p_get_screen_dpi_func, ShowVirtualKeyboardFunc p_show_vk, HideVirtualKeyboardFunc p_hide_vk, VirtualKeyboardHeightFunc p_vk_height_func, SetScreenOrientationFunc p_screen_orient, GetUniqueIDFunc p_get_unique_id, GetSystemDirFunc p_get_sdir_func, VideoPlayFunc p_video_play_func, VideoIsPlayingFunc p_video_is_playing_func, VideoPauseFunc p_video_pause_func, VideoStopFunc p_video_stop_func, SetKeepScreenOnFunc p_set_keep_screen_on_func, AlertFunc p_alert_func, bool p_use_apk_expansion) {
use_apk_expansion = p_use_apk_expansion;
default_videomode.width = 800;
default_videomode.height = 600;
default_videomode.fullscreen = true;
default_videomode.resizable = false;
gfx_init_func = p_gfx_init_func;
gfx_init_ud = p_gfx_init_ud;
main_loop = NULL;
gl_extensions = NULL;
//rasterizer = NULL;
use_gl2 = false;
open_uri_func = p_open_uri_func;
get_user_data_dir_func = p_get_user_data_dir_func;
get_locale_func = p_get_locale_func;
get_model_func = p_get_model_func;
get_screen_dpi_func = p_get_screen_dpi_func;
get_unique_id_func = p_get_unique_id;
get_system_dir_func = p_get_sdir_func;
video_play_func = p_video_play_func;
video_is_playing_func = p_video_is_playing_func;
video_pause_func = p_video_pause_func;
video_stop_func = p_video_stop_func;
show_virtual_keyboard_func = p_show_vk;
hide_virtual_keyboard_func = p_hide_vk;
get_virtual_keyboard_height_func = p_vk_height_func;
set_screen_orientation_func = p_screen_orient;
set_keep_screen_on_func = p_set_keep_screen_on_func;
alert_func = p_alert_func;
use_reload_hooks = false;
Vector<Logger *> loggers;
loggers.push_back(memnew(AndroidLogger));
_set_logger(memnew(CompositeLogger(loggers)));
AudioDriverManager::add_driver(&audio_driver_android);
}
OS_Android::~OS_Android() {
}
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