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Bitmaps and pitch

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I'm making a class that is going to manipulate data that I load from a file (probably bitmaps for now.) Here's an example of its usage:
CDataSurface SA, SB;
SB.CreateFromSurface(SA, CFS_SIZEONLY);

RECT SrcRect = { 0, 0, 32, 32 };
POINT DstPoint = { 100, 10 };
SA.CopyToSurface(&SB, &SrcRect, &DstPoint);

IDirect3DTexture9* pTexture = 0;
// Create texture using SA/SB's size
// texture, src rect, dst point, flags)
SB.CopyToTexture(pTexture, 0, 0, CTT_ALPHAMASK);

// render using pTexture now.

Edit: Ok, after thinking about it, I'm not loading the pitch from the file, so I guess I don't have to worry about it (someone please correct me if I'm wrong) unless I'm working with textures and surfaces. Thanks! [Edited by - Programmer16 on July 19, 2005 12:11:37 AM]

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Pitch is commonly used for such things as alignment in memory and whatever else the driver might be doing.

When reading data from file, I do not belive that bitmap files use internal scanline padding.

Obviously though you should never ignore pitch when dealing with a memory buffer =)

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