BitBlt Performance


I have a function that splits a multipage tiff into single pages and it uses the windows BitBlt function. In terms of performance, would the video card have any influence in doing the split? Would it be worth using a straight C/C++ library instead?

Best Solution

The video card won't participate in any activity unless it is the destination HDC of the BitBlt. A library dedicated to imaging functions should perform better for this task, since ultimately you will be writing these to disk.

If you were making alterations to the image data, then there is the possibility that using your video card could help; but only if you are rendering a lot of new image data for the destination tiffs, particularly 3D scenes and the like.

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