On Saturday 20 March 2004 9:37 am, Alan Grimes wrote:

> 70% of my time was being spent in " BitBlt class >> bitPeekerFormFrom: "
>
> Most of this time, (67% of the 70%) was spent in  a constructor method
> of Form, " extent: depth:"
>
> If this creation of an auxilary form could be discarded, then it would
> also be of great benefit to these other methods:
>
> B3DScanner > textureColor: aTexture atS: sValue atT: tValue
> ColorForm >  pixelValueAt: aPoint
> Form > floodFill2: aColor at: interiorPoint
> Form > pixelValueAt: aPoint          <<< this is the one I'm using,
> indirectly through
>
>     "colorAt: "
> Pen >  print: str withFont: font
> StarSqueakMorph > createPatchFormGetterAndSetter
> WarpBlt >  warpBitsSmoothing: n sourceMap: sourceMap

Well, none of those methods are meant to be used in tight/fast loops.

If you want to analyze forms repeatedly, then make your own bitPeeker and keep 
it around.

Or use other methods (for instance, use BitBlt to XOR with a desired color and 
then look for 0 pixels).

For instance, look at the implementation of 

Form>>floodFill2:at:

-- 
Ned Konz
http://bike-nomad.com/squeak/