diff --git a/src/video/uikit/SDL_uikitviewcontroller.m b/src/video/uikit/SDL_uikitviewcontroller.m
index 432033a8cb..82fd49dc38 100644
--- a/src/video/uikit/SDL_uikitviewcontroller.m
+++ b/src/video/uikit/SDL_uikitviewcontroller.m
@@ -118,6 +118,20 @@ SDL_HideHomeIndicatorHintChanged(void *userdata, const char *name, const char *o
SDL_HideHomeIndicatorHintChanged,
(__bridge void *) self);
#endif
+
+ /* Enable high refresh rates on iOS
+ * To enable this on phones, you should add the following line to Info.plist:
+ * CADisableMinimumFrameDurationOnPhone
+ */
+ if (@available(iOS 15.0, tvOS 15.0, *)) {
+ SDL_DisplayMode mode;
+ if (SDL_GetDesktopDisplayMode(0, &mode) == 0 && mode.refresh_rate > 60.0f) {
+ int frame_rate = (int)mode.refresh_rate;
+ displayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(doLoop:)];
+ displayLink.preferredFrameRateRange = CAFrameRateRangeMake((frame_rate * 2) / 3, frame_rate, frame_rate);
+ [displayLink addToRunLoop:NSRunLoop.currentRunLoop forMode:NSDefaultRunLoopMode];
+ }
+ }
}
return self;
}
@@ -147,6 +161,9 @@ SDL_HideHomeIndicatorHintChanged(void *userdata, const char *name, const char *o
{
[self stopAnimation];
+ if (interval <= 0) {
+ interval = 1;
+ }
animationInterval = interval;
animationCallback = callback;
animationCallbackParam = callbackParam;
@@ -191,7 +208,7 @@ SDL_HideHomeIndicatorHintChanged(void *userdata, const char *name, const char *o
- (void)doLoop:(CADisplayLink*)sender
{
/* Don't run the game loop while a messagebox is up */
- if (!UIKit_ShowingMessageBox()) {
+ if (animationCallback && !UIKit_ShowingMessageBox()) {
/* See the comment in the function definition. */
#if defined(SDL_VIDEO_OPENGL_ES) || defined(SDL_VIDEO_OPENGL_ES2)
UIKit_GL_RestoreCurrentContext();