Now I have a BITMAPFILEHEADER and BITMAPINFOHEADER structure for handle the bitmap. bitmap size is A4 with 150-200 dpi. (about 1646x2331)
I want to do some processing on this bitmap, How can I
1 Get/Set a specific pixel
2 Draw sth. on current bitmap
3 Create the projection (profile) of this bitmap
4 Select the area of skew regtangle
and some other pixel level functions that is very fast.