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/ IRIX Base Documentation 2002 November / SGI IRIX Base Documentation 2002 November.iso / usr / share / catman / g_man / cat3 / standard / writemask.z / writemask
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Text File  |  2002-10-03  |  2.1 KB  |  67 lines
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  4. wwwwrrrriiiitttteeeemmmmaaaasssskkkk((((3333GGGG))))                                                    wwwwrrrriiiitttteeeemmmmaaaasssskkkk((((3333GGGG))))
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  8. NNNNAAAAMMMMEEEE
  9.      wwwwrrrriiiitttteeeemmmmaaaasssskkkk - grants write permission to bitplanes
  10.  
  11. CCCC SSSSPPPPEEEECCCCIIIIFFFFIIIICCCCAAAATTTTIIIIOOOONNNN
  12.      vvvvooooiiiidddd wwwwrrrriiiitttteeeemmmmaaaasssskkkk((((wwwwttttmmmm))))
  13.      CCCCoooolllloooorrrriiiinnnnddddeeeexxxx wwwwttttmmmm;;;;
  14.  
  15. PPPPAAAARRRRAAAAMMMMEEEETTTTEEEERRRRSSSS
  16.      _w_t_m   expects a mask whose bits control which bitplanes are available for
  17.            drawing and which are read only.
  18.  
  19.            The mask contains one bit per available bitplane. If a bit is set
  20.            in the writemask, the system writes the current color index into
  21.            the corresponding bitplane. If a bit is set to zero in the
  22.            writemask, the corresponding bitplane is read-only.
  23.  
  24. DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
  25.      Use wwwwrrrriiiitttteeeemmmmaaaasssskkkk to reserve bitplanes for special purposes.  When the
  26.      writemask marks a bitplane as read-only, that bitplane is write protected
  27.      from ordinary drawing routines.
  28.  
  29.      Use RRRRGGGGBBBBwwwwrrrriiiitttteeeemmmmaaaasssskkkk in RGB mode.
  30.  
  31. SSSSEEEEEEEE AAAALLLLSSSSOOOO
  32.      color, drawmode, RGBwritemask
  33.  
  34. BBBBUUUUGGGGSSSS
  35.      wwwwrrrriiiitttteeeemmmmaaaasssskkkk does not work properly on the IRIS-4D VGX, VGXT and SKYWRITER
  36.      models when the current drawmode is not NNNNOOOORRRRMMMMAAAALLLLDDDDRRRRAAAAWWWW.
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  63.                                                                         PPPPaaaaggggeeee 1111
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