how to map this bitmap

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Btb4198

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what does this function really do ?

g.DrawImage(originalBmp, videoSourcePlayer.imagex, videoSourcePlayer.imagey, videoSourcePlayer.imgWidth, videoSourcePlayer.imgHeight);


I know it takes the original bitmap and zoom into it and then display it on my video player,

but what is it really doing ?

I want to be able to map it to a two dimensional array. but I do not know what is happening to the pixels when I do the zoom in to it. so I do not know how I to map it,

I have the original bitmap as an two dimension array of bit, but I how do I map it with doing this function ?

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