Thanks to all! Ron
On Mar 6, 9:24 am, Kyle Sluder <[email protected]> wrote: > On Mar 5, 2012, at 11:21 PM, Graham Cox <[email protected]> wrote: > > > > > Is the goal to go from red to blue from left to right? > > > Why not add a single layer with red on the left, alpha = 1, and blue on the > > right, alpha = 1? I don't see why you need to composite two layers. > > > Drawing a gradient dynamically is probably more efficient than blitting a > > PNG, and will be resolution independent. > > These scenarios are rarely so cut and dry. > > If all you want is a simple gradient, then using a CAGradientLayer should be > the fastest approach. It should result in zero backing store allocation. > > If you want to do something more complex, you might well do best to load a > PNG and set it as the layer's content, rather than perform the rendering > yourself. Tour VRAM usage will be known, and drawing your layer will involve > zero CPU usage or texture uploads. > > It all depends on your willingness to accept visual artifacts, the size > constraints of your binary, and what Instruments tells you is e best approach. > > --Kyle Sluder > _______________________________________________ > > Cocoa-dev mailing list ([email protected]) > > 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/cocoa-dev-garchive-... > > This email sent to [email protected] _______________________________________________ Cocoa-dev mailing list ([email protected]) 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 [email protected]
