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How to Avoid Filtering on Stretched Blits?

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In my Windowed DirectDraw7 app, when I blit from a 320x240 back buffer, to a 2x (640x480) window on my (1024x768) desktop, I get a blurry, filtered image. I would like to obtain sharp doubled pixels - does anyone know how I can set up my blit NOT to draw filtered? FYI, I''m using an Nvidia Vanta, and I have many Windowed apps that display both 1x and 2x sharp images. Thanks in advance, Simon.

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Guest Anonymous Poster
blit it yourself (though you lose hardware accelerated blits and could not do video to video blits only system to video). It would not be too slow since you will not be doing the bilinear filtering. I odnt think there is a way to turn that off though. You can try using a tweak utility for nvidia cards, or check the msdn to see if there is any info on modifing how blits are handled.

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