Hi David, Could you post a complete test app? There's nothing in what you've posted that looks problematic[1]. Also, what OS are you working on?
-Ken [1]: well, except maybe that you're likely to see antialiasing on the edges. Your problem looks more severe than antialiasing, though. On Thu, Aug 21, 2008 at 12:47 PM, David Springer <[EMAIL PROTECTED]> wrote: > Folks, > > For some reason, I am not able to figure this out. I want to draw a > scaled NSImage, but the edges of the image are not drawn, it seems > like the resizing actually clips the image. > > I have an NSBitmapImageRep created from some data. I then create the > NSImage like this: > > NSImage *image = [[NSImage alloc] initWithSize:NSMakeSize([myBitmap > pixelsWide], [myBitmap pixelsHigh]); > [image addRepresentation:myBitmap]; > [image setScalesWhenResized:YES]; > > // Figure out the new image size so that it is proportionally scaled > by |scaleFactor|. > NSSize scaledSize = ProportionallyScale([image size], scaleFactor); > [image drawInRect:NSMakeRect((kTileImageSize - scaledSize.width) * 0.5, > (kTileImageSize - scaledSize.height) * 0.5, > scaledSize.width, > scaledSize.height) > fromRect:NSZeroRect > operation:NSCompositeSourceOver > fraction:1.0]; > > This sometimes works (that is, the entire original image is visible). > But more often than not, the edges of the original image are not > drawn. See the screen shots for a picture of what I get. > > What am I doing wrong here? I have scoured the archives, I have tried > things like making sure scaledSize has integer values, I have even > done crazy things like add one to the height just to see what would > happen. Note that if I write out the TIFFRepresentation of |image| > (both before and after) the entire image gets into the file (that is, > the edges are not clipped). > > In the attached picture, the top tile is correct (you see all the > black edges), the bottom two tiles are incorrect (not all the black > edges are visible). > > Help? > Thanks! > - Dave.S > > _______________________________________________ > > 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/kenferry%40gmail.com > > This email sent to [EMAIL PROTECTED] > _______________________________________________ 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 [EMAIL PROTECTED]
