• Open Menu Close Menu
  • Apple
  • Shopping Bag
  • Apple
  • Mac
  • iPad
  • iPhone
  • Watch
  • TV
  • Music
  • Support
  • Search apple.com
  • Shopping Bag

Lists

Open Menu Close Menu
  • Terms and Conditions
  • Lists hosted on this site
  • Email the Postmaster
  • Tips for posting to public mailing lists
Re: drawRect troubles
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: drawRect troubles


  • Subject: Re: drawRect troubles
  • From: Scott Stevenson <email@hidden>
  • Date: Sat, 28 Oct 2006 20:11:31 -0700


On Oct 28, 2006, at 8:05 PM, Ivan Kourtev wrote:

For performance reasons I am trying to do incremental drawing -- draw/erase only small amounts of stuff that has changed -- but it seems that the view contents is "erased" between successive calls to drawRect. After each drawRect, I only see the incremental drawing -- the small stuff added/removed -- but not what was there before.

Have you tried playing with Quartz Debug's "flash updates" checkbox?

Should show you which areas are considered invalid at which points. Might help.

    - Scott
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Cocoa-dev mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden


  • Follow-Ups:
    • Re: drawRect troubles
      • From: Ivan Kourtev <email@hidden>
References: 
 >drawRect troubles (From: Ivan Kourtev <email@hidden>)

  • Prev by Date: drawRect troubles
  • Next by Date: RE: KVC and Bindings Question
  • Previous by thread: drawRect troubles
  • Next by thread: Re: drawRect troubles
  • Index(es):
    • Date
    • Thread