Hi, I'm trying to print, given a CGImageRef (cgImage). In order to do this correctly, I need to get a couple of 'CGImageProperty' from my image, like kCGImagePropertyDPIHeight, kCGImagePropertyDPIWidth and kCGImagePropertyOrientation. I try to do this from a CGImageSourceRef, which I create in the following way:
CGImageSourceRef imageSource = CGImageSourceCreateWithDataProvider(CGImageGetDataProvider(cgImage), NULL); Once I get the CGImageSourceRef, I make a call to CGImageSourceCopyProperties() passing it the imageSource . But this always returns a NULL. If I output this CGImageRef to a file, and then read it back as a CGImageSource, and then call CGImageSourceCopyProperties(), it works fine and gives me the required properties. But I need it to work without having to output an image file. >From my experience on Windows, DPIHeight and DPIWidth are properties of the display device the image is drawn on, and not properties of the image itself. And what is kCGImagePropertyOrientation? The print routine on Mac that I'm linking to needs it, but I have no idea what it is, and I don't think it has a Windows equivalent. Is it that the orientation of a saved image file can be one of a number of enumerations, but the orientation of a CGImageRef is always the default orientation? Thanks for your time. _______________________________________________ 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
