GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____IIIINNNNTTTT____8888____8888____8888____8888____EEEEXXXXTTTT, and GGGGLLLL____UUUUNNNNSSSSIIIIGGGGNNNNEEEEDDDD____IIIINNNNTTTT____11110000____11110000____11110000____2222____EEEEXXXXTTTT.
ggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee3333DDDDEEEEXXXXTTTT redefines a contiguous subregion of an existing
three-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. 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 or depth, 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 ggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee3333DDDDEEEEXXXXTTTT 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.
ggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee3333DDDDEEEEXXXXTTTT is only available if both the EEEEXXXXTTTT____ssssuuuubbbbtttteeeexxxxttttuuuurrrreeee and
EEEEXXXXTTTT____tttteeeexxxxttttuuuurrrreeee3333dddd 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.
EEEERRRRRRRROOOORRRRSSSS
GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____EEEENNNNUUUUMMMM is generated when _t_a_r_g_e_t is not GGGGLLLL____TTTTEEEEXXXXTTTTUUUURRRREEEE____3333DDDD____EEEEXXXXTTTT.
GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____OOOOPPPPEEEERRRRAAAATTTTIIIIOOOONNNN is generated when the texture array has not been
defined by a previous ggggllllTTTTeeeexxxxIIIImmmmaaaaggggeeee3333DDDD 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____MMMMAAAAXXXX____3333DDDD____TTTTEEEEXXXXTTTTUUUURRRREEEE____SSSSIIIIZZZZEEEE____EEEEXXXXTTTT.
GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____OOOOPPPPEEEERRRRAAAATTTTIIIIOOOONNNN is generated if ggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee3333DDDDEEEEXXXXTTTT is executed
between the execution of ggggllllBBBBeeeeggggiiiinnnn and the corresponding execution of
On IIIInnnnffffiiiinnnniiiitttteeeeRRRReeeeaaaalllliiiittttyyyy systems, there is a performance benefit when the width
of the image to be transferred to texture memory is a multiple of 8.
Texture borders are not supported on IIIInnnnffffiiiinnnniiiitttteeeeRRRReeeeaaaalllliiiittttyyyy systems.
Applications should use borderless textures and GGGGLLLL____CCCCLLLLAAAAMMMMPPPP____TTTTOOOO____EEEEDDDDGGGGEEEE____SSSSGGGGIIIISSSS
wrap mode.
The SSSSGGGGIIIIXXXX____iiiinnnntttteeeerrrrllllaaaacccceeee extension is supported only on IIIInnnnffffiiiinnnniiiitttteeeeRRRReeeeaaaalllliiiittttyyyy
systems, on RRRReeeeaaaalllliiiittttyyyyEEEEnnnnggggiiiinnnneeee, RRRReeeeaaaalllliiiittttyyyyEEEEnnnnggggiiiinnnneeee2222, and VVVVTTTTXXXX systems, on OOOOccccttttaaaannnneeee2222
VVVVPPPPrrrroooo systems, and on OOOO2222 systems.
The EEEEXXXXTTTT____ppppaaaacccckkkkeeeedddd____ppppiiiixxxxeeeellllssss extension is not supported on RRRReeeeaaaalllliiiittttyyyyEEEEnnnnggggiiiinnnneeee,
RRRReeeeaaaalllliiiittttyyyyEEEEnnnnggggiiiinnnneeee2222, and VVVVTTTTXXXX systems.
ggggllllTTTTeeeexxxxSSSSuuuubbbbIIIImmmmaaaaggggeeee3333DDDDEEEEXXXXTTTT 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.
