BalloonCanvas question

Hilaire Fernandes hilaire2006 at
Mon Nov 20 16:04:28 UTC 2006

Karl a écrit :
> Bert Freudenberg wrote:
>> On Nov 19, 2006, at 12:41 , Hilaire Fernandes wrote:
>>> Bert Freudenberg a écrit :
>>>> On Nov 19, 2006, at 10:22 , Hilaire Fernandes wrote:
>>>>> What is the use of the ifNoTransformWithIn: method?
>>>>> When I use the BalloonCanvas within a morph drawOn:  method, the 
>>>>> ifNoTransformWithIn: is forcing the use of the super graphic 
>>>>> method, so no anti-aliasing take place.
>>>>> I am sure there are pretty good reason, but I don't get it.
>>>> An axis-aligned rectangle can be drawn much faster using BitBlt than 
>>>> using Balloon. That case is detected by the method.
>>> Ok, so it is a feature. However in that case the AA is off and there 
>>> are no way to get it back, right?
>> BitBlt does no AA, right.
> I did some hacking a few years ago and did some overriding of the super 
> calls and did get anti alias with a speed penalty.
> karl

Thanks for your info.

I guess that all of my consideration will become more or less obsolete 
with the coming CAIRO support. I have not yet checked Rome, but I guess 
in that situation the cairo graphic functions could be used in the 
drawOn: morphic methods. Is it that?


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