At 23:19 Uhr +0100 06.01.2005, Quentin Mathé wrote:
Le 4 janv. 05, à 21:49, M. Uli Kusterer a écrit :
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.
ok, I understand the problem.
However, I think what we should do is just have
OS X's IconKit implementation ignore the
NSCompositingOperation for now. And maybe
NSLog(@"Unsupported compositing operation in
addIcon:") to the console if anything but "copy"
is used. Then you can implement this feature, and
I can later add compatibility code that manually
composits stuff.
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?
The compositor could be very useful for various
NSImage transformations, I wouldn't like to
restrict it to icons related operations. Well,
the right solution would be probably to create a
powerful compositor outside of the IconKit, then
the IconKit compositor could be derived from it
or not I don't know What do you think ?
Yeah, definitely a smart idea to have the
compositor a generic object that works on any
kind of NSImage. I don't even think you'd need a
special subclass for IKIcons.
However, what kinds of transformations do you
mean? I still think if there are many
transformations, we'd want the compositor to be a
parameter to addIcon:, so one can use different
ones while creating an icon with various badges.
Can you give a concrete example of how and what
for a developer would use this compositor?
--
Cheers,
M. Uli Kusterer
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