[Newbies] How to use Form pixelCompare:with:at:

Bert Freudenberg bert at freudenbergs.de
Tue Jan 7 14:57:44 UTC 2014


On 07.01.2014, at 15:19, Herbert König <herbertkoenig at gmx.net> wrote:

> Hi,
> 
> Form>>pixelCompare:with:at: seems to always return 0.
> 
> I use it like
> |pict1 pict2|
> pict1 := (Form extent: 100 at 100 depth: 32) fillBlack.
> pict2 := (Form extent: 100 at 100 depth: 32) fillWithColor: Color red.
> pict1 pixelCompare: pict1 boundingBox with: pict2 at: 0 at 0
> 
> As I get the same result in a 4.4 and a 3.8 image I guess I don't understand how it's used. No senders in either image.

Try 16 bit forms.

- Bert -

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