seedlingattempt/godot
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Move frame delaying functions from Main to OS.

Browse Source 
Will allow specific platforms to override it and avoid blocking on the
main/GUI thread.

(cherry picked from commit 1b6e3458b2)
This commit is contained in:
Fabio Alessandrelli
2020-06-29 20:46:21 +02:00
parent 3247ac4b0e
commit dc8b7b3b17
4 changed files with 40 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
core/os/os.cpp
View File

@ -41,6 +41,7 @@
#include <stdarg.h>
OS *OS::singleton = NULL;
uint64_t OS::target_ticks = 0;
OS *OS::get_singleton() {
@ -767,6 +768,41 @@ void OS::close_midi_inputs() {
}
}
void OS::add_frame_delay(bool p_can_draw) {
const uint32_t frame_delay = Engine::get_singleton()->get_frame_delay();
if (frame_delay) {
// Add fixed frame delay to decrease CPU/GPU usage. This doesn't take
// the actual frame time into account.
// Due to the high fluctuation of the actual sleep duration, it's not recommended
// to use this as a FPS limiter.
delay_usec(frame_delay * 1000);
}
// Add a dynamic frame delay to decrease CPU/GPU usage. This takes the
// previous frame time into account for a smoother result.
uint64_t dynamic_delay = 0;
if (is_in_low_processor_usage_mode() || !p_can_draw) {
dynamic_delay = get_low_processor_usage_mode_sleep_usec();
}
const int target_fps = Engine::get_singleton()->get_target_fps();
if (target_fps > 0 && !Engine::get_singleton()->is_editor_hint()) {
// Override the low processor usage mode sleep delay if the target FPS is lower.
dynamic_delay = MAX(dynamic_delay, (uint64_t)(1000000 / target_fps));
}
if (dynamic_delay > 0) {
target_ticks += dynamic_delay;
uint64_t current_ticks = get_ticks_usec();
if (current_ticks < target_ticks) {
delay_usec(target_ticks - current_ticks);
}
current_ticks = get_ticks_usec();
target_ticks = MIN(MAX(target_ticks, current_ticks - dynamic_delay), current_ticks + dynamic_delay);
}
}
OS::OS() {
void *volatile stack_bottom;

3
core/os/os.h
View File

@ -46,6 +46,7 @@ class Mutex;
class OS {
static OS *singleton;
static uint64_t target_ticks;
String _execpath;
List<String> _cmdline;
bool _keep_screen_on;
@ -345,6 +346,8 @@ public:
virtual uint64_t get_system_time_msecs() const;
virtual void delay_usec(uint32_t p_usec) const = 0;
virtual void add_frame_delay(bool p_can_draw);
virtual uint64_t get_ticks_usec() const = 0;
uint32_t get_ticks_msec() const;
uint64_t get_splash_tick_msec() const;