The Direct Interface Video Extensions (DIVE) architecture has been enhanced in OS/2 Version 3. The enhanced architecture is called EnDIVE and it supports the use of motion video accelerator hardware. Additional DEVESC_ functions are available for querying information about the color formats supported by the hardware, video memory management and image processing.

The additional DEVESC_ functions are provided to:

• Copy an image from the screen to system memory or to off-screen video memory in a compressed format (DEVESC_EXTGET)
  
• Copy an image to the screen (DEVESC_EXTPUT)
  
• Acquire information about the motion video accelerator (DEVESC_EXTQUERY)
  
• Take advantage of enhanced acquire functions and check on video memory buffer location (DEVESC_HWREQUEST)
  
• Acquire information about the frame buffer (DEVESC_QUERYFB)
  
• Register and unregister EnDIVE use (DEVESC_REGISTER)
  
• Allocate off-screen video memory (DEVESC_VRAMALLOC)
  
• Indicate if the hardware can support the current image blitting parameters (DEVESC_SETUPBLITTERNOTIFY)
  
• Inform the driver that video is hidden (DEVESC_VIDEOHIDDEN)

For a complete description of each EnDIVE function, see Mandatory and Simulated Graphics Engine Function Reference. The functions are listed alphabetically in the index table for that chapter.