# canDraw(inCGLContext:pixelFormat:forLayerTime:displayTime:) Returns whether the receiver should draw OpenGL content for the specified time. ``` func canDraw(inCGLContext ctx: CGLContextObj, pixelFormat pf: CGLPixelFormatObj, forLayerTime t: CFTimeInterval, displayTime ts: UnsafePointer?) -> Bool ``` ## Parameters `ctx` The `CGLContextObj` in to which the OpenGL content would be drawn. `pf` The pixel format used when the `glContext` 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 . --- 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)