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 Starbase Technical Addendum for the July, 1997 Workstation ACE for 10.20 HP-UX: HP 9000 Workstations and Servers > Chapter 3 The HP VISUALIZE-48 and HP VISUALIZE-48XP Devices

Starbase Echoes
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This section provides information about the echo implementation for Starbase. The HP Visualize-48, HP Visualize-48XP, and all future graphics device drivers will use this implementation of Starbase echoes.

Starbase echoes use Xlib functionality to draw echoes in the same planes as the visual that is active for the window. All previously supported Starbase echo functions are implemented except for those listed below:

  • There is no support for the following gescapes:

    R_DEF_ECHO_TRANS
    R_ECHO_FG_BG_COLORS
    R_OV_ECHO_COLORS
    R_OVERLAY_ECHO

    In addition, the R_ECHO_MASK is only supported for a maximum of two colors within the raster definition.

  • More than one Starbase echo per window is not supported.

  • Rendering with both Xlib and Starbase in the same window while Starbase echoes are active may produce some random pixel "noise".



Special Device Characteristics
  		 


Starbase Functionality  
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