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/ IRIX Base Documentation 1998 November / IRIX 6.5.2 Base Documentation November 1998.img / usr / share / catman / g_man / cat3 / OpenGL-ftn / fgltexsubimage1dext.z / fgltexsubimage1dext
Text File  |  1998-10-20  |  15KB  |  200 lines
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  4. ffffggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee1111DDDDEEEEXXXXTTTT((((3333GGGG))))        OOOOppppeeeennnnGGGGLLLL RRRReeeeffffeeeerrrreeeennnncccceeee        ffffggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee1111DDDDEEEEXXXXTTTT((((3333GGGG))))
  5.  
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  8. NNNNAAAAMMMMEEEE
  9.      ffffggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee1111DDDDEEEEXXXXTTTT - specify a one-dimensional texture subimage
  10.  
  11.  
  12. FFFFOOOORRRRTTTTRRRRAAAANNNN SSSSPPPPEEEECCCCIIIIFFFFIIIICCCCAAAATTTTIIIIOOOONNNN
  13.      SUBROUTINE ffffggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee1111DDDDEEEEXXXXTTTT( INTEGER*4 _t_a_r_g_e_t,
  14.                                      INTEGER*4 _l_e_v_e_l,
  15.                                      INTEGER*4 _x_o_f_f_s_e_t,
  16.                                      INTEGER*4 _w_i_d_t_h,
  17.                                      INTEGER*4 _f_o_r_m_a_t,
  18.                                      INTEGER*4 _t_y_p_e,
  19.                                      CHARACTER*8 _p_i_x_e_l_s )
  20.  
  21.  
  22. PPPPAAAARRRRAAAAMMMMEEEETTTTEEEERRRRSSSS
  23.      _t_a_r_g_e_t   Specifies the target texture.  Must be GGGGLLLL____TTTTEEEEXXXXTTTTUUUURRRREEEE____1111DDDD.
  24.  
  25.      _l_e_v_e_l    Specifies the level-of-detail number.  Level 0 is the base image
  26.               level.  Level _n is the _nth mipmap reduction image.
  27.  
  28.      _x_o_f_f_s_e_t  Specifies a texel offset in the x direction within the texture
  29.               array.
  30.  
  31.      _w_i_d_t_h    Specifies the width of the texture subimage.
  32.  
  33.      _f_o_r_m_a_t   Specifies the format of the pixel data.  The following symbolic
  34.               values are accepted:  GGGGLLLL____CCCCOOOOLLLLOOOORRRR____IIIINNNNDDDDEEEEXXXX, GGGGLLLL____RRRREEEEDDDD, GGGGLLLL____GGGGRRRREEEEEEEENNNN, GGGGLLLL____BBBBLLLLUUUUEEEE,
  35.               GGGGLLLL____AAAALLLLPPPPHHHHAAAA, GGGGLLLL____RRRRGGGGBBBB, GGGGLLLL____RRRRGGGGBBBBAAAA, GGGGLLLL____AAAABBBBGGGGRRRR____EEEEXXXXTTTT, GGGGLLLL____LLLLUUUUMMMMIIIINNNNAAAANNNNCCCCEEEE, and
  36.               GGGGLLLL____LLLLUUUUMMMMIIIINNNNAAAANNNNCCCCEEEE____AAAALLLLPPPPHHHHAAAA.
  37.  
  38.      _t_y_p_e     Specifies the data type of the pixel data.  The following
  39.               symbolic values are accepted:  GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____BBBBYYYYTTTTEEEE, GGGGLLLL____BBBBYYYYTTTTEEEE,
  40.               GGGGLLLL____BBBBIIIITTTTMMMMAAAAPPPP, GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____SSSSHHHHOOOORRRRTTTT, GGGGLLLL____SSSSHHHHOOOORRRRTTTT, GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____IIIINNNNTTTT, GGGGLLLL____IIIINNNNTTTT,
  41.               GGGGLLLL____FFFFLLLLOOOOAAAATTTT, GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____BBBBYYYYTTTTEEEE____3333____3333____2222____EEEEXXXXTTTT,
  42.               GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____SSSSHHHHOOOORRRRTTTT____4444____4444____4444____4444____EEEEXXXXTTTT, GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____SSSSHHHHOOOORRRRTTTT____5555____5555____5555____1111____EEEEXXXXTTTT,
  43.               GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____IIIINNNNTTTT____8888____8888____8888____8888____EEEEXXXXTTTT, and GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____IIIINNNNTTTT____11110000____11110000____11110000____2222____EEEEXXXXTTTT.
  44.  
  45.      _p_i_x_e_l_s   Specifies a pointer to the image data in memory.
  46.  
  47.  
  48. DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
  49.      Texturing maps a portion of a specified _t_e_x_t_u_r_e _i_m_a_g_e onto each graphical
  50.      primitive for which texturing is enabled.  One-dimensional texturing is
  51.      enabled and disabled using ffffggggllllEEEEnnnnaaaabbbblllleeee and ffffggggllllDDDDiiiissssaaaabbbblllleeee with argument
  52.      GGGGLLLL____TTTTEEEEXXXXTTTTUUUURRRREEEE____1111DDDD.
  53.  
  54.      ffffggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee1111DDDDEEEEXXXXTTTT redefines a contiguous subregion of an existing one-
  55.      dimensional texture array.  The texels referenced by _p_i_x_e_l_s replace the
  56.      portion of the existing texture array with x indices _x_o_f_f_s_e_t and
  57.      _x_o_f_f_s_e_t+_w_i_d_t_h-1, inclusive.  This region may not include any texels
  58.      outside the range of the texture array as it was originally specified.
  59.      It is not an error to specify a subtexture with zero width, but such a
  60.  
  61.  
  62.  
  63.                                                                         PPPPaaaaggggeeee 1111
  64.  
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  70. ffffggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee1111DDDDEEEEXXXXTTTT((((3333GGGG))))        OOOOppppeeeennnnGGGGLLLL RRRReeeeffffeeeerrrreeeennnncccceeee        ffffggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee1111DDDDEEEEXXXXTTTT((((3333GGGG))))
  71.  
  72.  
  73.  
  74.      specification has no effect.
  75.  
  76. NNNNOOOOTTTTEEEESSSS
  77.      Texturing has no effect in color index mode.
  78.  
  79.      ffffggggllllPPPPiiiixxxxeeeellllSSSSttttoooorrrreeee and ffffggggllllPPPPiiiixxxxeeeellllTTTTrrrraaaannnnssssffffeeeerrrr modes affect texture images in exactly
  80.      the way they affect ffffggggllllDDDDrrrraaaawwwwPPPPiiiixxxxeeeellllssss.
  81.  
  82.      ffffggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee1111DDDDEEEEXXXXTTTT is part of the EEEEXXXXTTTT____ssssuuuubbbbtttteeeexxxxttttuuuurrrreeee extension.
  83.  
  84.      If _t_y_p_e is set to GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____BBBBYYYYTTTTEEEE____3333____3333____2222____EEEEXXXXTTTT,
  85.      GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____SSSSHHHHOOOORRRRTTTT____4444____4444____4444____4444____EEEEXXXXTTTT, GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____SSSSHHHHOOOORRRRTTTT____5555____5555____5555____1111____EEEEXXXXTTTT,
  86.      GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____IIIINNNNTTTT____8888____8888____8888____8888____EEEEXXXXTTTT, or GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____IIIINNNNTTTT____11110000____11110000____11110000____2222____EEEEXXXXTTTT and the
  87.      EEEEXXXXTTTT____ppppaaaacccckkkkeeeedddd____ppppiiiixxxxeeeellllssss extension is not supported then a GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____EEEENNNNUUUUMMMM error
  88.      is generated.
  89.  
  90.      See ffffggggllllIIIInnnnttttrrrroooo for more information on using extensions.
  91.  
  92. EEEERRRRRRRROOOORRRRSSSS
  93.      GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____EEEENNNNUUUUMMMM is generated when _t_a_r_g_e_t is not GGGGLLLL____TTTTEEEEXXXXTTTTUUUURRRREEEE____1111DDDD.
  94.  
  95.      GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____OOOOPPPPEEEERRRRAAAATTTTIIIIOOOONNNN is generated when the texture image has not been
  96.      defined by a previous ffffggggllllTTTTeeeexxxxIIIImmmmaaaaggggeeee1111DDDD operation.
  97.  
  98.      GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____VVVVAAAALLLLUUUUEEEE is generated if _l_e_v_e_l is less than zero or greater than
  99.      log (_m_a_x), where _m_a_x is the returned value of GGGGLLLL____MMMMAAAAXXXX____TTTTEEEEXXXXTTTTUUUURRRREEEE____SSSSIIIIZZZZEEEE.
  100.         2
  101.  
  102.      GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____VVVVAAAALLLLUUUUEEEE is generated if xoffset<-TEXTURE_BORDER, or if
  103.      (xoffset+width)>(TEXTURE_WIDTH-TEXTURE_BORDER), where TEXTURE_WIDTH is
  104.      the width of the image being modified and TEXTURE_BORDER is the border
  105.      width of the image being modified.  Note that TEXTURE_WIDTH includes
  106.      twice the border width.
  107.  
  108.      GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____EEEENNNNUUUUMMMM is generated when _f_o_r_m_a_t is not an accepted _f_o_r_m_a_t
  109.      constant. Format constants other than GGGGLLLL____SSSSTTTTEEEENNNNCCCCIIIILLLL____IIIINNNNDDDDEEEEXXXX and
  110.      GGGGLLLL____DDDDEEEEPPPPTTTTHHHH____CCCCOOOOMMMMPPPPOOOONNNNEEEENNNNTTTT are accepted.
  111.  
  112.      GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____EEEENNNNUUUUMMMM is generated when _t_y_p_e is not a _t_y_p_e constant.
  113.  
  114.      GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____EEEENNNNUUUUMMMM is generated if _t_y_p_e is GGGGLLLL____BBBBIIIITTTTMMMMAAAAPPPP and _f_o_r_m_a_t is not
  115.      GGGGLLLL____CCCCOOOOLLLLOOOORRRR____IIIINNNNDDDDEEEEXXXX.
  116.  
  117.      GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____OOOOPPPPEEEERRRRAAAATTTTIIIIOOOONNNN is generated if ffffggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee1111DDDDEEEEXXXXTTTT is executed
  118.      between the execution of ffffggggllllBBBBeeeeggggiiiinnnn and the corresponding execution of
  119.      ffffggggllllEEEEnnnndddd.
  120.  
  121. AAAASSSSSSSSOOOOCCCCIIIIAAAATTTTEEEEDDDD GGGGEEEETTTTSSSS
  122.      ffffggggllllGGGGeeeettttTTTTeeeexxxxIIIImmmmaaaaggggeeee
  123.      ffffggggllllIIIIssssEEEEnnnnaaaabbbblllleeeedddd with argument GGGGLLLL____TTTTEEEEXXXXTTTTUUUURRRREEEE____1111DDDD
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  129.  
  130.                                                                         PPPPaaaaggggeeee 2222
  131.  
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  136.  
  137. ffffggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee1111DDDDEEEEXXXXTTTT((((3333GGGG))))        OOOOppppeeeennnnGGGGLLLL RRRReeeeffffeeeerrrreeeennnncccceeee        ffffggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee1111DDDDEEEEXXXXTTTT((((3333GGGG))))
  138.  
  139.  
  140.  
  141. MMMMAAAACCCCHHHHIIIINNNNEEEE DDDDEEEEPPPPEEEENNNNDDDDEEEENNNNCCCCIIIIEEEESSSS
  142.      On InfiniteReality systems, there is a performance benefit when the width
  143.      of the image to be transferred to texture memory is a multiple of 8.
  144.  
  145.      Texture borders are not supported on InfiniteReality systems.
  146.      Applications should use borderless textures and GGGGLLLL____CCCCLLLLAAAAMMMMPPPP____TTTTOOOO____EEEEDDDDGGGGEEEE____SSSSGGGGIIIISSSS
  147.      wrap mode.
  148.  
  149.      The EEEEXXXXTTTT____ppppaaaacccckkkkeeeedddd____ppppiiiixxxxeeeellllssss extension is not supported on RealityEngine,
  150.      RealityEngine2, and VTX systems.
  151.  
  152.      ffffggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee1111DDDD and ffffggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee1111DDDDEEEEXXXXTTTT are not supported on
  153.      RealityEngine, RealityEngine2, and VTX systems.
  154.  
  155.      On High Impact and Maximum Impact systems, if the right side of the image
  156.      to be transferred to texture memory is not the right side of the texture,
  157.      then its index must be a multiple of 32, where index = xoffset+width.
  158.      Otherwise it will generate a GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____VVVVAAAALLLLUUUUEEEE error.
  159.  
  160.  
  161. SSSSEEEEEEEE AAAALLLLSSSSOOOO
  162.      ffffggggllllDDDDrrrraaaawwwwPPPPiiiixxxxeeeellllssss, ffffggggllllFFFFoooogggg, ffffggggllllPPPPiiiixxxxeeeellllSSSSttttoooorrrreeee, ffffggggllllPPPPiiiixxxxeeeellllTTTTrrrraaaannnnssssffffeeeerrrr, ffffggggllllTTTTeeeexxxxEEEEnnnnvvvv,
  163.      ffffggggllllTTTTeeeexxxxGGGGeeeennnn, ffffggggllllTTTTeeeexxxxIIIImmmmaaaaggggeeee1111DDDD, ffffggggllllTTTTeeeexxxxPPPPaaaarrrraaaammmmeeeetttteeeerrrr.
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  196.                                                                         PPPPaaaaggggeeee 3333
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