graphicsContextWithBitmapImageRep: with flipped view (continued with sample code)
graphicsContextWithBitmapImageRep: with flipped view (continued with sample code)
- Subject: graphicsContextWithBitmapImageRep: with flipped view (continued with sample code)
- From: Mathieu Martin <email@hidden>
- Date: Tue, 13 Dec 2005 17:55:41 +0100
Hello here is the mail I send a few days ago on cocoa-dev list.
This time I add a small example app the illustrate my point
I'm trying to capture a view to create a CIImage I want to use with some CoreGraphics filters.
This method works fine when I try to capture the all view or if the view is not clipped by a scrollview. But as soon as I try to capture the visible portion of a view that is clipped I don't get every thing I ask for. The top or the bottom is empty but what is drawn is at the right position. My view is flipped so I tried to convert [self visibleRect] but then the position of the elements of my view are wrong and I still get those horizontal lines at the top or the button of the image, depending of where I scroll the view.
doawnlod this file to get the code
http://homepage.mac.com/WebObjects/FileSharing.woa/wa/cachingDrawingOffscreenView.zip.zip?a=downloadFile&user=mamat&path=.Public/Cocoa-Quartz-Bugs/cachingDrawingOffscreenView.zip
If someone have an idea about this, that would be nice to let me know.
regards
mat.
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