# canDraw(in:pixelFormat:forLayerTime:displayTime:) Invoked to ask the layer whether it can (or should) draw. ``` func canDraw(in context: NSOpenGLContext, pixelFormat: NSOpenGLPixelFormat, forLayerTime t: CFTimeInterval, displayTime ts: UnsafePointer) -> Bool ``` ## Parameters `context` The NSOpenGLContext in to which the OpenGL content would be drawn. `pixelFormat` The pixel format used when the context was created. `t` The current layer time. `ts` The display timestamp associated with timeInterval. Can be `null`. ## Return Value if the receiver should render OpenGL content, otherwise. ## Discussion This method is called before attempting to render the frame for the layer time specified by `timeInterval`. If the method returns , the frame is skipped. The default implementation always returns . ## See Also [Core Animation Programming Guide](https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/CoreAnimation_guide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40004514) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)