Re: TortoiseIDiff "compare" vs. "show difference"

Lorenz wrote:
> Hi Stefan,
>
> Stefan Küng wrote:
>> Lorenz wrote:
>>> Hi Stefan,
>>> [...]
> Stefan Küng wrote:
>>> I'm not sure if the xor-view is the right methode, though.
>>> If I understand it correctly, identical pixels are displayed in
>>> background color, whereas differing pixel show up as some (at least to
>>> me) unpredictable mixed color.
>>> I'll do more tests the next days.
>> You're right, identical pixels show in the background color (well, they
>> are made to disappear). And the pixels which are different show up in
>> the 'merged' (OR'ed) color of both pixels.
>
> I don't think that's really OR'ed, but it's XOR'ed neither, nor any
> other boolean operation I can identify 8-(

Ok, you got me :)
It's actually an XOR, and then a NOT. Without the invert after the XOR,
identical pixels would show as black.

>> That's the best we can do, really.
>
> as I don't know how the software does it's magic internally (yet), I
> can't comment on that.
>
> I will try to find the time to look into the source code myself.
> Despite the fact, that windows programing for me is a totaly strange
> and foreign land 8-)

Well, take this as an opportunity to learn something new :)

>
> And thanks for the /overlay and /fit command line options.
>
> Ahem ... what do you think about a /noImageInfo switch <wry grin>

see revision 10235.

Stefan

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