DisplayLinkManager Class Reference

#import <vsync_waiter_ios.h>

Inheritance diagram for DisplayLinkManager:

Class Methods
(double)	+ displayRefreshRate
(double)	+ displayRefreshRate
	The display refresh rate used for reporting purposes. The engine does not care about this for frame scheduling. It is only used by tools for instrumentation. The engine uses the duration field of the link per frame for frame scheduling. More...

Properties
BOOL	maxRefreshRateEnabledOnIPhone

Detailed Description

Definition at line 12 of file FlutterMetalLayer.mm.

Method Documentation

displayRefreshRate [1/2]

+ (double) displayRefreshRate

Definition at line 160 of file vsync_waiter_ios.mm.

                             {
  fml::scoped_nsobject<CADisplayLink> display_link = fml::scoped_nsobject<CADisplayLink> {
    [[CADisplayLink displayLinkWithTarget:[[[DisplayLinkManager alloc] init] autorelease]
                                 selector:@selector(onDisplayLink:)] retain]
  };
  display_link.get().paused = YES;
  auto preferredFPS = display_link.get().preferredFramesPerSecond;
 
  // From Docs:
  // The default value for preferredFramesPerSecond is 0. When this value is 0, the preferred
  // frame rate is equal to the maximum refresh rate of the display, as indicated by the
  // maximumFramesPerSecond property.
 
  if (preferredFPS != 0) {
    return preferredFPS;
  }
 
  return [UIScreen mainScreen].maximumFramesPerSecond;
}

Referenced by VSyncClient::initWithTaskRunner:callback:.

displayRefreshRate [2/2]

+ (double) displayRefreshRate

The display refresh rate used for reporting purposes. The engine does not care about this for frame scheduling. It is only used by tools for instrumentation. The engine uses the duration field of the link per frame for frame scheduling.

Attention

Do not use the this call in frame scheduling. It is only meant for reporting.

Returns

The refresh rate in frames per second.

Property Documentation

maxRefreshRateEnabledOnIPhone

- (BOOL) maxRefreshRateEnabledOnIPhone

readnonatomicassign

Definition at line 13 of file FlutterMetalLayer.mm.

Referenced by VSyncClient::setMaxRefreshRate:.

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The documentation for this class was generated from the following files:

• shell/platform/darwin/ios/framework/Source/FlutterMetalLayer.mm
• shell/platform/darwin/ios/framework/Source/vsync_waiter_ios.h
• shell/platform/darwin/ios/framework/Source/vsync_waiter_ios.mm