Comments on: Image manipulation and drawing using Quartz in the background threads http://www.codingventures.com/2009/08/image-manipulation-and-drawing-using-quartz-in-the-background-threads/ Kerem Karatal’s musings on code, technology and more… Tue, 20 Dec 2011 11:32:00 +0000 hourly 1 http://wordpress.org/?v=3.3 By: getexback http://www.codingventures.com/2009/08/image-manipulation-and-drawing-using-quartz-in-the-background-threads/comment-page-1/#comment-236 getexback Thu, 30 Jun 2011 13:45:58 +0000 http://www.codingventures.com/?p=166#comment-236 <p>Wow,Incredible article,It is so useful for me,and your blog post is very good,i`ve learned a lot form your blog here,keep on going,my friend,I will keep an eye on it,one more thing,thanks for your post!If someone wants to know<a href="http://howcanigetmygirlfriendback.com" rel="nofollow">how can i get my girlfriend back</a>.There is also good!welcome to</p> Wow,Incredible article,It is so useful for me,and your blog post is very good,i`ve learned a lot form your blog here,keep on going,my friend,I will keep an eye on it,one more thing,thanks for your post!If someone wants to knowhow can i get my girlfriend back.There is also good!welcome to

]]> By: EmbadaEngaw http://www.codingventures.com/2009/08/image-manipulation-and-drawing-using-quartz-in-the-background-threads/comment-page-1/#comment-225 EmbadaEngaw Sun, 10 Apr 2011 16:32:29 +0000 http://www.codingventures.com/?p=166#comment-225 <p>Hello everyone thanks for</p> <p>good information.</p> Hello everyone thanks for

good information.

]]> By: Zeine http://www.codingventures.com/2009/08/image-manipulation-and-drawing-using-quartz-in-the-background-threads/comment-page-1/#comment-215 Zeine Tue, 08 Mar 2011 11:20:58 +0000 http://www.codingventures.com/?p=166#comment-215 <p>Thanks! Real solution for my problem (manipulating with UIImage in background thread)</p> Thanks! Real solution for my problem (manipulating with UIImage in background thread)

]]> By: IvoryCuff http://www.codingventures.com/2009/08/image-manipulation-and-drawing-using-quartz-in-the-background-threads/comment-page-1/#comment-198 IvoryCuff Sat, 30 Oct 2010 17:06:18 +0000 http://www.codingventures.com/?p=166#comment-198 <p>Just thought I should take a second and say hi to everyone today. Looking forward to the forum and what everyone has to talk about.</p> Just thought I should take a second and say hi to everyone today. Looking forward to the forum and what everyone has to talk about.

]]> By: erik ramfelt http://www.codingventures.com/2009/08/image-manipulation-and-drawing-using-quartz-in-the-background-threads/comment-page-1/#comment-197 erik ramfelt Wed, 27 Oct 2010 18:06:06 +0000 http://www.codingventures.com/?p=166#comment-197 <p>Thanks for informing me on the difference between the two functions!</p> Thanks for informing me on the difference between the two functions!

]]> By: Alexander86 http://www.codingventures.com/2009/08/image-manipulation-and-drawing-using-quartz-in-the-background-threads/comment-page-1/#comment-131 Alexander86 Sat, 12 Sep 2009 07:38:30 +0000 http://www.codingventures.com/?p=166#comment-131 <p>Some time ago I worked on a "graphics-driven" project and found the same way to make off-screen drawings. Very usefull article.</p> Some time ago I worked on a “graphics-driven” project and found the same way to make off-screen drawings. Very usefull article.

]]> By: keremk http://www.codingventures.com/2009/08/image-manipulation-and-drawing-using-quartz-in-the-background-threads/comment-page-1/#comment-107 keremk Tue, 04 Aug 2009 21:15:40 +0000 http://www.codingventures.com/?p=166#comment-107 <p>UIKit is not thread safe, but CoreGraphics (mostly) is. In this case, I am creating many images in the background. This is basically piece of some code that displays thumbnails of images in a vertically scrolling view (sort of like image gallery app) with some adornments such as shadows, borders etc. In this case moving this image generation code to the UI thread makes the app unresponsive, as each image generation blocks the UI thread and makes the scrolling jerky. It is best to handle that in the background thread along with downloading of the images in the first place.</p> UIKit is not thread safe, but CoreGraphics (mostly) is. In this case, I am creating many images in the background. This is basically piece of some code that displays thumbnails of images in a vertically scrolling view (sort of like image gallery app) with some adornments such as shadows, borders etc. In this case moving this image generation code to the UI thread makes the app unresponsive, as each image generation blocks the UI thread and makes the scrolling jerky. It is best to handle that in the background thread along with downloading of the images in the first place.

]]> By: Hendrik http://www.codingventures.com/2009/08/image-manipulation-and-drawing-using-quartz-in-the-background-threads/comment-page-1/#comment-106 Hendrik Tue, 04 Aug 2009 19:17:41 +0000 http://www.codingventures.com/?p=166#comment-106 <p>As far as I understand, none of UIKit is thread safe. So it might be best to do the UIImage creation on the main thread via performSelectorOnMainThread:</p> <p>That's what (I think) I do in my own code.</p> As far as I understand, none of UIKit is thread safe. So it might be best to do the UIImage creation on the main thread via performSelectorOnMainThread:

That’s what (I think) I do in my own code.

]]> By: ultrasurf http://www.codingventures.com/2009/08/image-manipulation-and-drawing-using-quartz-in-the-background-threads/comment-page-1/#comment-105 ultrasurf Tue, 04 Aug 2009 00:52:26 +0000 http://www.codingventures.com/?p=166#comment-105 <p>useful information. It’s really good</p> useful information. It’s really good

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