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Blitting to overlay surface on nVidia chipsets troubles...

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Hello, I have been developing an application for video recording for uncommon Video Capture Card. I''ve been using DirectX 7 overlay surfaces to display captured images (UYVY format). There wasn''t any problems on ATI video gfx cards, but on nVidia chipsets when i''m blitting image from backbuffer surface to overlay surface and rescaling it, the image is not copied correctly! First of all the image is not rescaled! It has the same size as in source surface (backbuffer)! The second - I have got a lot of "trash" on the image, and i couldn''t change the position of the image in overlay surface. Please, let me know if any of You, Dear Readers, have met the same problem or even have found the solution for my troubles. Yonashek / Poland

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