How to correct the values so that my magnification is accurrate to where i point at?

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StretchBlt(hdc, 512-(ZOOM_SIZE*magnification), 512-(ZOOM_SIZE*magnification), ZOOM_SIZE*magnification, ZOOM_SIZE*magnification, hdc, x, y, ZOOM_SIZE, ZOOM_SIZE, SRCCOPY);

[EDIT]
StretchBlt(hdc, 512+10, 0, 512, 512, hdc, x, y, 60, 60, SRCCOPY);

this it wad i corrected but still can't work.

Posted 19-Apr-11 17:27pm

Member 7853086

Updated 19-Apr-11 18:47pm

Sergey Alexandrovich Kryukov

v2

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2 solutions

Solution 3

If your problem is a low-quality result image then you may have a look at my Plain C Resampling DLL[^]. On the other hand if your problems are incorrect values passed to the StretchBlt function then you should post some relevant code to get better help.

Posted 19-Apr-11 21:36pm

CPallini

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Rajesh R Subramanian 20-Apr-11 4:56am

That's a blatant advertisement! [OK, I'm kidding] :)

CPallini 20-Apr-11 5:03am

Precisely! :-D

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OriginalGriff · Accepted Answer · 2011-04-19T20:14:00

Solution 2

Without knowing exactly what is going wrong - you don't tell us - I can guess that you have some serious visual distortion?

Think about it: your source and destination device contexts are the same. That means that the stretch will overwrite the source as it goes...

Posted 19-Apr-11 20:14pm

OriginalGriff

Comments

Niklas L 20-Apr-11 4:05am

Sounds reasonable. 5 for psychic power.

OriginalGriff 20-Apr-11 4:10am

You are the second person to accuse me of psychic powers this week...:laugh:

Niklas L 20-Apr-11 4:17am

There might just be something to it then :)

OriginalGriff 20-Apr-11 4:21am

I'll just pop out and get a tin-foil hat...