TortoiseIDiff - Comparison

Hello again...

I have been looking a little at the image comparison problem now, and I
have some more thoughts.

To implement any image comparisons, one needs pixel-access to the
images. Right now this is only available as a mem-HDC in the
WM_PAINT-handler, and doing comparisons there is not a particularly good
idea since a comparison may be a lengthy process.

The best way would be if we could create a way to get the raw data from
the CPicture class. Today that's not possible as I see it. Question:
What format should we use? If we change to DevIL (ditching GDI+
altogether), it will provide the necessary methods for raw access. Is
that the way to go?

Stefan, what do you say? Am I missing some obvious way to get to the
data nicely?

Hans-Emil

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Received on Tue Sep 26 15:38:54 2006