On Jul 15, 2008, at 10:42 PM, Rick Mann wrote:
However, at the time that my drawing code is called, the CGContextRef that's handed to me is NOT scaled. So my drawing is done small, and then only scaled afterward by some blit operation. The result is very pixilated lines.
If you are dealing with CALayers, then the context covers the number of pixels defined by layer.bounds.size. If you are dealing with a CATiledLayer, then the context passed covers the number of pixels defined by layer.tileSize. The primary difference between a CALayer and a CATiledLayer is that the tiled layer has multiple representations for the same content, whereas a CALayer has only one representation (which is also why a CATiledLayer requires more resources than a CALayer).
This is also why when you scale up a CALayer its content its content looks interpolated - its the same number of pixels as before, just interpolated larger. If you exceed the maximum LOD of a tiled layer, you will see the same thing (which if you don't set a LOD bias means if you scale a tiled layer above 1.0 it will also have its content interpolated).
I've tried making my root layer a CATiledLayer, and I've tried making my individual sublayers CATiledLayers (and setting levels of detail for both). Nothing works.
I'm not certain why it would not, at least not with all your layers as tiled layers. If just your root layer is a tiled layer, then it would need to be transformed for its drawing code to be re-invoked, and it would not effect any of the sublayers directly.
I don't really want to have to set the scale on each sublayer; this seems to defeat the purpose of the drawing transform.
This wouldn't have the effect you would want anyway (both transforms would be concatenated, which would end up with an explosion of size unless you flattened your layer hierarchy)
The documentation says that any transform applied to a layer also applies to its sublayers, but this is not what I'm seeing; at least, not at draw time.
Can't really say what you are or are not seeing here, I'd probably have to see code. If this is critical, I'd recommend filing a DTS incident.
-- David Duncan Apple DTS Animation and Printing [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]
