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Re: Replace -lockFocus with Block-Based Drawing Method
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Re: Replace -lockFocus with Block-Based Drawing Method

  • Subject: Re: Replace -lockFocus with Block-Based Drawing Method
  • From: Jerry Krinock <email@hidden>
  • Date: Tue, 30 Dec 2014 19:57:06 -0800
Just to clarify on the guidelines for using -lockFocus in the Resolution Independent world…

Apple’s advice to avoid -lockFocus [1] only applies to drawing into NSImage objects, which is called “off-screen drawing”.  Using -lockFocus in -[NSView drawRect] is, I suppose, “on-screen drawing”, and this is still OK.

Am I correct?

Thanks,

Jerry

1.  https://developer.apple.com/library/mac/documentation/GraphicsAnimation/Conceptual/HighResolutionOSX/CapturingScreenContents/CapturingScreenContents.html#//apple_ref/doc/uid/TP40012302-CH10-SW32


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  • Follow-Ups:
    • Re: Replace -lockFocus with Block-Based Drawing Method
      • From: Ken Thomases <email@hidden>
References: 
 >Why use NSCustomImageRep for drawing in code in NSImage? (From: Jerry Krinock <email@hidden>)
 >Re: Why use NSCustomImageRep for drawing in code in NSImage? (From: Ken Thomases <email@hidden>)
 >Re: Why use NSCustomImageRep for drawing in code in NSImage? (From: Jerry Krinock <email@hidden>)
 >Re: Replace -lockFocus with Block-Based Drawing Method (was NSCustomImageRep…) (From: Jerry Krinock <email@hidden>)
 >Re: Replace -lockFocus with Block-Based Drawing Method (was NSCustomImageRep…) (From: Ken Thomases <email@hidden>)
 >Re: Replace -lockFocus with Block-Based Drawing Method (was NSCustomImageRep…) (From: Jerry Krinock <email@hidden>)

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