GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____IIIINNNNTTTT____8888____8888____8888____8888____EEEEXXXXTTTT, and GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____IIIINNNNTTTT____11110000____11110000____11110000____2222____EEEEXXXXTTTT.
_p_i_x_e_l_s Specifies a pointer to the image data in memory.
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
Texturing maps a portion of a specified _t_e_x_t_u_r_e _i_m_a_g_e onto each graphical
primitive for which texturing is enabled. Four-dimensional texturing is
enabled and disabled using ggggllllEEEEnnnnaaaabbbblllleeee and ggggllllDDDDiiiissssaaaabbbblllleeee with argument
ggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee4444DDDDSSSSGGGGIIIISSSS redefines a contiguous subregion of an existing
four-dimensional texture image. The texels referenced by _p_i_x_e_l_s replace
the portion of the existing texture array with x indices _x_o_f_f_s_e_t and
_x_o_f_f_s_e_t+_w_i_d_t_h-1, inclusive, y indices _y_o_f_f_s_e_t and _y_o_f_f_s_e_t+_h_e_i_g_h_t-1,
inclusive (But, see discussion of GGGGLLLL____IIIINNNNTTTTEEEERRRRLLLLAAAACCCCEEEE____SSSSGGGGIIIIXXXX below), and z indices
_z_o_f_f_s_e_t and _z_o_f_f_s_e_t+_d_e_p_t_h-1, inclusive and w indices _w_o_f_f_s_e_t and
_w_o_f_f_s_e_t+_s_i_z_e_4_d-1, inclusive. This region may not include any texels
outside the range of the texture array as it was originally specified.
It is not an error to specify a subtexture with zero width, height,
depth, or extent, but such a specification has no effect.
If GGGGLLLL____IIIINNNNTTTTEEEERRRRLLLLAAAACCCCEEEE____SSSSGGGGIIIIXXXX is enabled, then every other row of the destination
texture is skipped. That is, only rows (0,2,4,...) of each S-T slice
(where the border is considered part of the slice) are defined. A
complete video frame may be assembled in a slice of the texture array by
invoking ggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee4444DDDDSSSSGGGGIIIISSSS on two consecutive video fields, with
_y_o_f_f_s_e_t values that differ by one.
NNNNOOOOTTTTEEEESSSS
Texturing has no effect in color index mode.
ggggllllPPPPiiiixxxxeeeellllSSSSttttoooorrrreeee and ggggllllPPPPiiiixxxxeeeellllTTTTrrrraaaannnnssssffffeeeerrrr modes affect texture images in exactly
the way they affect ggggllllDDDDrrrraaaawwwwPPPPiiiixxxxeeeellllssss.
ggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee4444DDDDSSSSGGGGIIIISSSS is only available if both the EEEEXXXXTTTT____ssssuuuubbbbtttteeeexxxxttttuuuurrrreeee and
SSSSGGGGIIIISSSS____tttteeeexxxxttttuuuurrrreeee4444DDDD extensions are supported.
If _t_y_p_e is set to GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____BBBBYYYYTTTTEEEE____3333____3333____2222____EEEEXXXXTTTT,
GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____IIIINNNNTTTT____8888____8888____8888____8888____EEEEXXXXTTTT, or GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____IIIINNNNTTTT____11110000____11110000____11110000____2222____EEEEXXXXTTTT and the
EEEEXXXXTTTT____ppppaaaacccckkkkeeeedddd____ppppiiiixxxxeeeellllssss extension is not supported then a GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____EEEENNNNUUUUMMMM error
is generated.
See ggggllllIIIInnnnttttrrrroooo for more information on using extensions.
GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____EEEENNNNUUUUMMMM is generated when _t_a_r_g_e_t is not GGGGLLLL____TTTTEEEEXXXXTTTTUUUURRRREEEE____4444DDDD____SSSSGGGGIIIISSSS.
GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____OOOOPPPPEEEERRRRAAAATTTTIIIIOOOONNNN is generated when the texture array has not been
defined by a previous ggggllllTTTTeeeexxxxIIIImmmmaaaaggggeeee4444DDDD operation.
GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____VVVVAAAALLLLUUUUEEEE is generated if _l_e_v_e_l is less than zero or greater than
log (_m_a_x), where _m_a_x is the returned value of
GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____OOOOPPPPEEEERRRRAAAATTTTIIIIOOOONNNN is generated if ggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee4444DDDDSSSSGGGGIIIISSSS is executed
between the execution of ggggllllBBBBeeeeggggiiiinnnn and the corresponding execution of
The EEEEXXXXTTTT____ppppaaaacccckkkkeeeedddd____ppppiiiixxxxeeeellllssss extension is not supported on RRRReeeeaaaalllliiiittttyyyyEEEEnnnnggggiiiinnnneeee,
RRRReeeeaaaalllliiiittttyyyyEEEEnnnnggggiiiinnnneeee2222, and VVVVTTTTXXXX systems.
On HHHHiiiigggghhhh IIIImmmmppppaaaacccctttt and MMMMaaaaxxxxiiiimmmmuuuummmm IIIImmmmppppaaaacccctttt systems, if the right side of the image
to be transferred to texture memory is not the right side of the texture,
then its index must be a multiple of 32, where index = xoffset+width.
Otherwise it will generate a GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____VVVVAAAALLLLUUUUEEEE error.
