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Enable high refresh rates on iOS

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Fixes https://github.com/libsdl-org/SDL/issues/7518
This commit is contained in:
Sam Lantinga
2024-12-18 14:18:11 -08:00
parent da80b9bce5
commit 835b6e0c1a
1 changed files with 17 additions and 1 deletions
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18
src/video/uikit/SDL_uikitviewcontroller.m
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@@ -111,6 +111,19 @@ static void SDLCALL SDL_HideHomeIndicatorHintChanged(void *userdata, const char
SDL_HideHomeIndicatorHintChanged, SDL_HideHomeIndicatorHintChanged,
(__bridge void *)self); (__bridge void *)self);
#endif #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, *)) {
const SDL_DisplayMode *mode = SDL_GetDesktopDisplayMode(SDL_GetPrimaryDisplay());
if (mode && 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; return self;
} }
@@ -145,6 +158,9 @@ static void SDLCALL SDL_HideHomeIndicatorHintChanged(void *userdata, const char
{ {
[self stopAnimation]; [self stopAnimation];
if (interval <= 0) {
interval = 1;
}
animationInterval = interval; animationInterval = interval;
animationCallback = callback; animationCallback = callback;
animationCallbackParam = callbackParam; animationCallbackParam = callbackParam;
@@ -185,7 +201,7 @@ static void SDLCALL SDL_HideHomeIndicatorHintChanged(void *userdata, const char
- (void)doLoop:(CADisplayLink *)sender - (void)doLoop:(CADisplayLink *)sender
{ {
// Don't run the game loop while a messagebox is up // 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. // See the comment in the function definition.
#if defined(SDL_VIDEO_OPENGL_ES) || defined(SDL_VIDEO_OPENGL_ES2) #if defined(SDL_VIDEO_OPENGL_ES) || defined(SDL_VIDEO_OPENGL_ES2)
UIKit_GL_RestoreCurrentContext(); UIKit_GL_RestoreCurrentContext();