> On 05 Dec 2016, at 17:23, J.E. Schotsman <jesc...@xs4all.nl> wrote: > > Hello, > > I intend to increase contrast of inactive radio buttons a little because they > are hardly legible. > The idea is to draw to a bitmap, increase contrast, draw to screen. > To my surprise this already increases contrast without any manipulation of > the bitmap. > What is going on here?
To answer my own question, I forgot to clear the bitmap each time before drawing. Also the bitmap itself needs to be renewed each time in order to force regeneration of its CGImage. Jan E. _______________________________________________ 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
