fgltexsubimage4dsgis man page on IRIX

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fglTexSubImage4DSGIS(3G)       OpenGL Reference	      fglTexSubImage4DSGIS(3G)

NAME
     fglTexSubImage4DSGIS - specify a four-dimensional texture subimage

FORTRAN SPECIFICATION
     SUBROUTINE fglTexSubImage4DSGIS( INTEGER*4 target,
				      INTEGER*4 level,
				      INTEGER*4 xoffset,
				      INTEGER*4 yoffset,
				      INTEGER*4 zoffset,
				      INTEGER*4 woffset,
				      INTEGER*4 width,
				      INTEGER*4 height,
				      INTEGER*4 depth,
				      INTEGER*4 size4d,
				      INTEGER*4 format,
				      INTEGER*4 type,
				      CHARACTER*8 pixels )

PARAMETERS
     target   Specifies the target texture.  Must be GL_TEXTURE_4D_SGIS.

     level    Specifies the level-of-detail number.  Level 0 is the base image
	      level.  Level n is the nth mipmap reduction image.

     xoffset  Specifies a texel offset in the x direction within the texture
	      array.

     yoffset  Specifies a texel offset in the y direction within the texture
	      array.

     zoffset  Specifies a texel offset in the z direction within the texture
	      array.

     woffset  Specifies a texel offset in the w direction within the texture
	      array.

     width    Specifies the width of the texture subimage.

     height   Specifies the height of the texture subimage.

     depth    Specifies the depth of the texture subimage.

     size4d   Specifies the extent (4th dimension size) of the texture
	      subimage.

     format   Specifies the format of the pixel data.  The following symbolic
	      values are accepted:  GL_COLOR_INDEX, GL_RED, GL_GREEN, GL_BLUE,
	      GL_ALPHA, GL_RGB, GL_RGBA, GL_ABGR_EXT, GL_LUMINANCE, and
	      GL_LUMINANCE_ALPHA.

									Page 1

fglTexSubImage4DSGIS(3G)       OpenGL Reference	      fglTexSubImage4DSGIS(3G)

     type     Specifies the data type of the pixel data.  The following
	      symbolic values are accepted:  GL_UNSIGNED_BYTE, GL_BYTE,
	      GL_BITMAP, GL_UNSIGNED_SHORT, GL_SHORT, GL_UNSIGNED_INT, GL_INT,
	      GL_FLOAT, GL_UNSIGNED_BYTE_3_3_2_EXT,
	      GL_UNSIGNED_SHORT_4_4_4_4_EXT, GL_UNSIGNED_SHORT_5_5_5_1_EXT,
	      GL_UNSIGNED_INT_8_8_8_8_EXT, and GL_UNSIGNED_INT_10_10_10_2_EXT.

     pixels   Specifies a pointer to the image data in memory.

DESCRIPTION
     Texturing maps a portion of a specified texture image onto each graphical
     primitive for which texturing is enabled.	Four-dimensional texturing is
     enabled and disabled using fglEnable and fglDisable with argument
     GL_TEXTURE_4D_SGIS.

     fglTexSubImage4DSGIS redefines a contiguous subregion of an existing
     four-dimensional texture image.  The texels referenced by pixels replace
     the portion of the existing texture array with x indices xoffset and
     xoffset+width-1, inclusive, y indices yoffset and yoffset+height-1,
     inclusive (But, see discussion of GL_INTERLACE_SGIX below), and z indices
     zoffset and zoffset+depth-1, inclusive and w indices woffset and
     woffset+size4d-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 GL_INTERLACE_SGIX 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 fglTexSubImage4DSGIS on two consecutive video fields, with
     yoffset values that differ by one.

NOTES
     Texturing has no effect in color index mode.

     fglPixelStore and fglPixelTransfer modes affect texture images in exactly
     the way they affect fglDrawPixels.

     fglTexSubImage4DSGIS is only available if both the EXT_subtexture and
     SGIS_texture4D extensions are supported.

     If type is set to GL_UNSIGNED_BYTE_3_3_2_EXT,
     GL_UNSIGNED_SHORT_4_4_4_4_EXT, GL_UNSIGNED_SHORT_5_5_5_1_EXT,
     GL_UNSIGNED_INT_8_8_8_8_EXT, or GL_UNSIGNED_INT_10_10_10_2_EXT and the
     EXT_packed_pixels extension is not supported then a GL_INVALID_ENUM error
     is generated.

     See fglIntro for more information on using extensions.

									Page 2

fglTexSubImage4DSGIS(3G)       OpenGL Reference	      fglTexSubImage4DSGIS(3G)

ERRORS
     GL_INVALID_ENUM is generated when target is not GL_TEXTURE_4D_SGIS.

     GL_INVALID_OPERATION is generated when the texture array has not been
     defined by a previous fglTexImage4D operation.

     GL_INVALID_VALUE is generated if level is less than zero or greater than
     log (max), where max is the returned value of
	2
     GL_MAX_4D_TEXTURE_SIZE_SGIS.

     GL_INVALID_VALUE is generated if xoffset<-TEXTURE_BORDER,
     (xoffset+width)>(TEXTURE_WIDTH-TEXTURE_BORDER), yoffset<-TEXTURE_BORDER,
     (yoffset+interlacexheight)>(TEXTURE_HEIGHT-TEXTURE_BORDER),
     zoffset<-TEXTURE_BORDER, (zoffset+depth)>(TEXTURE_DEPTH_EXT-
     TEXTURE_BORDER), where TEXTURE_WIDTH, TEXTURE_HEIGHT, TEXTURE_DEPTH_EXT
     and TEXTURE_BORDER, (woffset+size4d)>(TEXTURE_4DSIZE_SGIS-
     TEXTURE_BORDER), where TEXTURE_WIDTH, TEXTURE_HEIGHT, TEXTURE_DEPTH_EXT,
     TEXTURE_4DSIZE_SGIS and TEXTURE_BORDER are the state values of the
     texture image being modified, and interlace is 1 if GL_INTERLACE_SGIX is
     disabled and 2 otherwise.	Note that TEXTURE_WIDTH, TEXTURE_HEIGHT,
     TEXTURE_DEPTH_EXT and TEXTURE_4DSIZE_SGIS include twice the border width.

     GL_INVALID_ENUM is generated when format is not an accepted format
     constant.

     GL_INVALID_ENUM is generated when type is not a type constant.

     GL_INVALID_ENUM is generated if type is GL_BITMAP and depth is not
     GL_COLOR_INDEX.

     GL_INVALID_OPERATION is generated if fglTexSubImage4DSGIS is executed
     between the execution of fglBegin and the corresponding execution of
     fglEnd.

ASSOCIATED GETS
     fglGetTexImage
     fglIsEnabled with argument GL_TEXTURE_4D_SGIS

MACHINE DEPENDENCIES
     The EXT_packed_pixels extension is not supported on RealityEngine,
     RealityEngine2, and VTX systems.

     On High Impact and Maximum Impact 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 GL_INVALID_VALUE error.

									Page 3

fglTexSubImage4DSGIS(3G)       OpenGL Reference	      fglTexSubImage4DSGIS(3G)

SEE ALSO
     fglDrawPixels, fglFog, fglPixelStore, fglPixelTransfer, fglTexEnv,
     fglTexGen, fglTexImage4D, fglTexParameter.

									Page 4

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