On Mon, Feb 23, 2009 at 7:42 PM, Michael Ash <michael....@gmail.com> wrote:
> On Mon, Feb 23, 2009 at 4:51 PM, David Alter <alterconsult...@gmail.com> > wrote: > > I need to get a CGImage out of a NSBitmapImageRep. This needs to work in > > 10.4. > > I tried doing this by setting the bitmap as the graphics context and then > > creating the image form the context. This gives me an > CGBitmapContextCreate: > > unsupported parameter combination. Here is the code > > > > NSGraphicsContext * context = [NSGraphicsContext > > graphicsContextWithBitmapImageRep:offscreenRep]; > > > > CGContextRef bitmapContext = (CGContextRef)[context graphicsPort]; > > > > CGImageRef image = CGBitmapContextCreateImage (bitmapContext); > > > > I suspect there is a better way to do this. Does anyone have any > > suggestions. > > Just call CGImageCreate. Most of the parameters can be obtained by > simply querying the NSBitmapImageRep, and the remainder are not > terribly difficult to create yourself, being either constants or > fairly easy to construct. > > That should work fine. As I have progressed with this, I would like to do some additional drawing in my NSBitmapImageRep. Is there a way that I can set it as my NSGraphicsContext. As I noted earlier NSGraphicsContext graphicsContextWithBitmapImageRep: is giving me an error. What I want to do is create the NSBitmapImageRep from a jpg. Draw into the image and extract a CGImageRef out. I need to be able to access the individual pixels of the image. Maybe there is a better way to do this? thanks for the help -dave _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
