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/ SGI Developer Toolbox 6.1 / SGI Developer Toolbox 6.1 - Disc 1.iso / toolbox / documents / OpenGL / extensions / man / glgetminmaxext.z / glgetminmaxext
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Text File  |  1996-11-11  |  6.7 KB  |  133 lines
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  4. ggggllllGGGGeeeettttMMMMiiiinnnnmmmmaaaaxxxxEEEEXXXXTTTT((((3333GGGG))))             OOOOppppeeeennnnGGGGLLLL RRRReeeeffffeeeerrrreeeennnncccceeee             ggggllllGGGGeeeettttMMMMiiiinnnnmmmmaaaaxxxxEEEEXXXXTTTT((((3333GGGG))))
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  8. NNNNAAAAMMMMEEEE
  9.      ggggllllGGGGeeeettttMMMMiiiinnnnmmmmaaaaxxxxEEEEXXXXTTTT - get minimum and maximum pixel values
  10.  
  11.  
  12. CCCC SSSSPPPPEEEECCCCIIIIFFFFIIIICCCCAAAATTTTIIIIOOOONNNN
  13.      void ggggllllGGGGeeeettttMMMMiiiinnnnmmmmaaaaxxxxEEEEXXXXTTTT( GLenum _t_a_r_g_e_t,
  14.                           GLboolean _r_e_s_e_t,
  15.                           GLenum _f_o_r_m_a_t,
  16.                           GLenum _t_y_p_e,
  17.                           GLvoid *_v_a_l_u_e_s )
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  20. PPPPAAAARRRRAAAAMMMMEEEETTTTEEEERRRRSSSS
  21.      _t_a_r_g_e_t  Must be GGGGLLLL____MMMMIIIINNNNMMMMAAAAXXXX____EEEEXXXXTTTT.
  22.  
  23.      _r_e_s_e_t   If GGGGLLLL____TTTTRRRRUUUUEEEE, all entries in the minmax table that are actually
  24.              returned are reset to their initial values.  (Other entries are
  25.              unaltered.)  If GGGGLLLL____FFFFAAAALLLLSSSSEEEE, the minmax table is unaltered.
  26.  
  27.      _f_o_r_m_a_t  The format of the data to be returned in _v_a_l_u_e_s.  Must be one of
  28.              GGGGLLLL____RRRREEEEDDDD, GGGGLLLL____GGGGRRRREEEEEEEENNNN, GGGGLLLL____BBBBLLLLUUUUEEEE, GGGGLLLL____AAAALLLLPPPPHHHHAAAA, GGGGLLLL____RRRRGGGGBBBB, GGGGLLLL____RRRRGGGGBBBBAAAA,
  29.              GGGGLLLL____AAAABBBBGGGGRRRR____EEEEXXXXTTTT, GGGGLLLL____LLLLUUUUMMMMIIIINNNNAAAANNNNCCCCEEEE, or GGGGLLLL____LLLLUUUUMMMMIIIINNNNAAAANNNNCCCCEEEE____AAAALLLLPPPPHHHHAAAA.
  30.  
  31.      _t_y_p_e    The type of the data to be returned in _v_a_l_u_e_s.  Must be one of
  32.              GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____BBBBYYYYTTTTEEEE, GGGGLLLL____BBBBYYYYTTTTEEEE, GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____SSSSHHHHOOOORRRRTTTT, GGGGLLLL____SSSSHHHHOOOORRRRTTTT,
  33.              GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____IIIINNNNTTTT, GGGGLLLL____IIIINNNNTTTT, or GGGGLLLL____FFFFLLLLOOOOAAAATTTT.
  34.  
  35.      _v_a_l_u_e_s  A pointer to storage for the returned values.
  36.  
  37. DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
  38.      ggggllllGGGGeeeettttMMMMiiiinnnnmmmmaaaaxxxxEEEEXXXXTTTT returns the accumulated minimum and maximum pixel values
  39.      (computed on a per-component basis) in a one-dimensional image of width
  40.      2.  The first set of return values are the minima, and the second set of
  41.      return values are the maxima.  The format of the return values is
  42.      determined by _f_o_r_m_a_t, and their type is determined by _t_y_p_e.
  43.  
  44.      No pixel transfer operations are performed on the return values, but
  45.      pixel storage modes that are applicable to 1-dimensional images are
  46.      performed.  Color components that are requested in the specified _f_o_r_m_a_t,
  47.      but which are not included in the internal format of the minmax table,
  48.      are returned as zero.  The assignment of internal color components to the
  49.      components requested by _f_o_r_m_a_t are as follows:
  50.  
  51.                        Internal Component   Result Component
  52.                        _____________________________________
  53.                        red                  red
  54.                        green                green
  55.                        blue                 blue
  56.                        alpha                alpha
  57.                        luminance            red
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  63.                                                                         PPPPaaaaggggeeee 1111
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  70. ggggllllGGGGeeeettttMMMMiiiinnnnmmmmaaaaxxxxEEEEXXXXTTTT((((3333GGGG))))             OOOOppppeeeennnnGGGGLLLL RRRReeeeffffeeeerrrreeeennnncccceeee             ggggllllGGGGeeeettttMMMMiiiinnnnmmmmaaaaxxxxEEEEXXXXTTTT((((3333GGGG))))
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  74.      If _r_e_s_e_t is GGGGLLLL____TTTTRRRRUUUUEEEE, the minmax table entries corresponding to the return
  75.      values are reset to their initial values.  Minimum and maximum values
  76.      that are not returned are not modified, even if _r_e_s_e_t is GGGGLLLL____TTTTRRRRUUUUEEEE.
  77.  
  78. EEEERRRRRRRROOOORRRRSSSS
  79.      GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____EEEENNNNUUUUMMMM is generated if _t_a_r_g_e_t is not GGGGLLLL____MMMMIIIINNNNMMMMAAAAXXXX____EEEEXXXXTTTT.
  80.  
  81.      GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____EEEENNNNUUUUMMMM is generated if _f_o_r_m_a_t is not one of the allowable
  82.      values.
  83.  
  84.      GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____EEEENNNNUUUUMMMM is generated if _t_y_p_e is not one of the allowable values.
  85.  
  86.      GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____OOOOPPPPEEEERRRRAAAATTTTIIIIOOOONNNN is generated if ggggllllGGGGeeeettttMMMMiiiinnnnmmmmaaaaxxxxEEEEXXXXTTTT is executed between
  87.      the execution of ggggllllBBBBeeeeggggiiiinnnn and the corresponding execution of ggggllllEEEEnnnndddd.
  88.  
  89. SSSSEEEEEEEE AAAALLLLSSSSOOOO
  90.      ggggllllMMMMiiiinnnnmmmmaaaaxxxxEEEEXXXXTTTT, ggggllllRRRReeeesssseeeettttMMMMiiiinnnnmmmmaaaaxxxxEEEEXXXXTTTT, ggggllllGGGGeeeettttMMMMiiiinnnnmmmmaaaaxxxxPPPPaaaarrrraaaammmmeeeetttteeeerrrrEEEEXXXXTTTT.
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  129.                                                                         PPPPaaaaggggeeee 2222
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