122 Quadro Workstation User’s GuideChapter 7Configuring Key ForceWare Graphics Driver FeaturesOverlays are supported in 16-bit and 32-bit color modes.Exported Pixel TypesApplies to graphics cards based on newer NVIDIA GPUs, such as the Quadro FXseries.Option available only on newer NVIDIA GPUs) lets you specify pixel formats to usefor overlays in OpenGL.• Color indexed overlays (8bpp) allows the application to use 8-bit palettedoverlays.• RGB overlays (RGB555 format) allows the application to use 16-bit (RGB555)overlays.• Color indexed (8 bpp) and RGB555 format allows the application to use either 8-bit paletted or 16-bit (RGB555) overlays.Overlays need additional onboard graphics memory and may not be available underall resolutions. You may want to reduce the resolution or color depth if you haveproblems accessing overlay functionality.Using Video Overlay SettingsUse the Video Overlay settings to adjust the quality of video or DVD playback onyour display.Note that these settings affect videos that are created using the hardware overlay, buthave no effect on videos created using software overlays, or a “blit” process such asVMR.Note: If any settings changes you make have no effect on the video overlay after youclick Apply, close the video overlay and then re-open it.Tip: Overlays need additional onboard graphics memory and may not beavailable under all resolutions. You may want to reduce the resolutionor color depth if you have problems accessing overlay functionality.Tip: If the stereo or overlay features do not work properly, you may want totry setting different screen resolutions and refresh rates until you arriveat a setting or combination of settings for better results.
