c++ - GetPixel in GDI -

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using getpixel, right retrieve pixel information hdc temporarily store after draw on each wm_paint call?

it x,y pixel value of whatever bitmap selected within hdc.

http://msdn.microsoft.com/en-us/library/dd144909%28vs.85%29.aspx

getpixel quite slow, if recall correctly. depending on want do, lot faster access raw bitmap data directly.


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