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Enable high refresh rates on iOS 

Fixes https://github.com/libsdl-org/SDL/issues/7518

(cherry picked from commit 835b6e0c1a)
This commit is contained in:
Sam Lantinga 2024-12-18 14:18:11 -08:00
parent 7f880c9121
commit 974098464f
1 changed files with 18 additions and 1 deletions
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19
src/video/uikit/SDL_uikitviewcontroller.m
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@ -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:
* <key>CADisableMinimumFrameDurationOnPhone</key> <true/>
*/
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();