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/*
* MIT License
*
* Copyright (c) 2022 Joey Castillo
*
* 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 <stdio.h>
#include "watch.h"
#include "watch_main_loop.h"
#include <emscripten.h>
#include <emscripten/html5.h>
#define ANIMATION_FRAME_ID_IS_VALID(id) ((id) >= 0)
#define ANIMATION_FRAME_ID_INVALID (-1)
#define ANIMATION_FRAME_ID_SUSPENDED (-2)
static bool sleeping = true;
static volatile long animation_frame_id = ANIMATION_FRAME_ID_INVALID;
// make compiler happy
static void main_loop_set_sleeping(bool sleeping);
static EM_BOOL main_loop(double time, void *userData);
static inline void request_next_frame(void) {
if (animation_frame_id == ANIMATION_FRAME_ID_INVALID) {
animation_frame_id = emscripten_request_animation_frame(main_loop, NULL);
}
}
static EM_BOOL main_loop(double time, void *userData) {
if (main_loop_is_sleeping()) {
request_next_frame();
return EM_FALSE;
}
if (sleeping) {
sleeping = false;
app_wake_from_standby();
}
animation_frame_id = ANIMATION_FRAME_ID_INVALID;
bool can_sleep = app_loop();
if (can_sleep) {
app_prepare_for_standby();
sleeping = true;
animation_frame_id = ANIMATION_FRAME_ID_INVALID;
return EM_FALSE;
}
request_next_frame();
return EM_FALSE;
}
void resume_main_loop(void) {
if (!ANIMATION_FRAME_ID_IS_VALID(animation_frame_id)) {
animation_frame_id = emscripten_request_animation_frame(main_loop, NULL);
}
}
void suspend_main_loop(void) {
if (ANIMATION_FRAME_ID_IS_VALID(animation_frame_id)) {
emscripten_cancel_animation_frame(animation_frame_id);
}
animation_frame_id = ANIMATION_FRAME_ID_SUSPENDED;
}
void main_loop_sleep(uint32_t ms) {
main_loop_set_sleeping(true);
emscripten_sleep(ms);
main_loop_set_sleeping(false);
}
bool main_loop_is_sleeping(void) {
return EM_ASM_INT({ return Module['suspended']; }) != 0;
}
static void main_loop_set_sleeping(bool sleeping) {
EM_ASM({
Module['suspended'] = $0;
}, sleeping);
}
int main(void) {
printf("Hello, world!\n");
app_init();
_watch_init();
app_setup();
resume_main_loop();
return 0;
}
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