At 20:54 Uhr +0100 04.01.2005, Quentin Mathé wrote:
Come to think of it, I'm not even sure I can
do the compositing operation. I can do alpha by
simply doing a copy of the icon with the alpha
applied and compositing that, but the actual
compositing is done by Icon Services on MacOS.
I didn't mean I couldn't composite. It's just
that one of the addIcon methods takes an
NSCompositingOperation, and CompositeIconRef
simply slaps two IconRefs on top of each other,
not offering any means to decide whether they
will be xOred or have a certain transparency or
whatever.
I can fake transparency, because IconRefs
contain alpha channels, and I could draw an
IconRef into an NSImage, change its transparency
and then generate a new IconRef from that, but
I'd have to do the entire compositing using
NSImages if I want to control the
NSCompositingOperation.
GetIconRefVariant
Specifies a transformation for a given IconRef.
Transformation are state changes like
"highlighted", "disabled" or a label. The rest
isn't really relevant (except
PlotIconRefInContext, of course, which is the
only way to get my icon into an NSImage).
The problem is a GNUstep application ported to
Cocoa, but which links the IconKit, has to be
able to use IKIcon in the GNUstep way internally
especially when it is relying on
IKApplicationIconProvider
See my other message for questions regarding
IKApplicationIconProvider. I'm not yet clear why
it would be needed on MacOS at all.
Then we need to be able to use the GNUstep
related IconKit compositor in a Cocoa
application, I don't think it is a problem
because the IKCompositor could be compiled with
Cocoa.
What would IKCompositor be used for? In most
cases, icon badges will not do anything apart
from being drawn opaque or slightly transparent
on top of their icon. Users are able to do that
using IKIcon. I don't think the users will care
whether IKIcon uses IKCompositor or IconServices
internally. Is this feature really needed?
--
Cheers,
M. Uli Kusterer
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