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RE: Fast Screen update
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RE: Fast Screen update


  • Subject: RE: Fast Screen update
  • From: klee04 <email@hidden>
  • Date: Tue, 16 Nov 2004 08:34:04 +0900

I am sorry to ask this, but I am new to Mac Programming.  Do you have to switch entire application to use OpenGL?  Or is there a routine to access specific OpenGL routines?

 

Thanks

 

Kanghoon Lee

 


From: John Stiles [mailto:email@hidden]
Sent: Tuesday, November 16, 2004 1:55 AM
To: klee04
Cc: email@hidden
Subject: Re: Fast Screen update

 

You could use OpenGL. It would be much faster.
If you require 10.4, you could use CoreImage. That would also be faster.
Another idea for performance: make a borderless window that's filled with solid white. Position it directly above your image. Now change the alpha of this window corresponding to how bright you want the picture to be. (If you want to turn the brightness DOWN, then fill the window with black instead of white). This is kind of cheesy but is less work than switching your entire app to use OpenGL.


On Nov 15, 2004, at 2:32 AM, klee04 wrote:

Hi,

 

Is there a way to update changes to image faster on the screen?  I tried to change brightness of a 2 MB photo image, and it is too slow.  I, however, tried another program, and it changes brightness instantaneously.  Any help would be greatly appreciated.

 

Thanks,

 

Kanghoon Lee.

 

 
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References: 
 >Re: Fast Screen update (From: John Stiles <email@hidden>)

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