glTexSubImage4DSGIS(3G) OpenGL Reference glTexSubImage4DSGIS(3G)
NAME
glTexSubImage4DSGIS - specify a four-dimensional texture subimage
C SPECIFICATION
void glTexSubImage4DSGIS( GLenum target,
GLint level,
GLint xoffset,
GLint yoffset,
GLint zoffset,
GLint woffset,
GLsizei width,
GLsizei height,
GLsizei depth,
GLsizei size4d,
GLenum format,
GLenum type,
const GLvoid *pixels )
PARAMETERS
target Specifies the target texture. Must be GLTEXTURE4DSGIS.
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: GLCOLORINDEX, GLRED, GLGREEN, GLBLUE,
GLALPHA, GLRGB, GLRGBA, GLABGREXT, GLLUMINANCE, and
GLLUMINANCEALPHA.
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glTexSubImage4DSGIS(3G) OpenGL Reference glTexSubImage4DSGIS(3G)
type Specifies the data type of the pixel data. The following
symbolic values are accepted: GLUNSIGNEDBYTE, GLBYTE,
GLBITMAP, GLUNSIGNEDSHORT, GLSHORT, GLUNSIGNEDINT, GLINT,
GLFLOAT, GLUNSIGNEDBYTE332EXT,
GLUNSIGNEDSHORT4444EXT, GLUNSIGNEDSHORT5551EXT,
GLUNSIGNEDINT8888EXT, and GLUNSIGNEDINT1010102EXT.
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 glEnable and glDisable with argument
GLTEXTURE4DSGIS.
glTexSubImage4DSGIS 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 GLINTERLACESGIX 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 GLINTERLACESGIX 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 glTexSubImage4DSGIS on two consecutive video fields, with
yoffset values that differ by one.
NOTES
Texturing has no effect in color index mode.
glPixelStore and glPixelTransfer modes affect texture images in exactly
the way they affect glDrawPixels.
glTexSubImage4DSGIS is only available if both the EXTsubtexture and
SGIStexture4D extensions are supported.
If type is set to GLUNSIGNEDBYTE332EXT,
GLUNSIGNEDSHORT4444EXT, GLUNSIGNEDSHORT5551EXT,
GLUNSIGNEDINT8888EXT, or GLUNSIGNEDINT1010102EXT and the
EXTpackedpixels extension is not supported then a GLINVALIDENUM error
is generated.
See glIntro for more information on using extensions.
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glTexSubImage4DSGIS(3G) OpenGL Reference glTexSubImage4DSGIS(3G)
ERRORS
GLINVALIDENUM is generated when target is not GLTEXTURE4DSGIS.
GLINVALIDOPERATION is generated when the texture array has not been
defined by a previous glTexImage4D operation.
GLINVALIDVALUE is generated if level is less than zero or greater than
log (max), where max is the returned value of
2
GLMAX4DTEXTURESIZESGIS.
GLINVALIDVALUE 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 GLINTERLACESGIX is
disabled and 2 otherwise. Note that TEXTURE_WIDTH, TEXTURE_HEIGHT,
TEXTURE_DEPTH_EXT and TEXTURE_4DSIZE_SGIS include twice the border width.
GLINVALIDENUM is generated when format is not an accepted format
constant.
GLINVALIDENUM is generated when type is not a type constant.
GLINVALIDENUM is generated if type is GLBITMAP and depth is not
GLCOLORINDEX.
GLINVALIDOPERATION is generated if glTexSubImage4DSGIS is executed
between the execution of glBegin and the corresponding execution of
glEnd.
ASSOCIATED GETS
glGetTexImage
glIsEnabled with argument GLTEXTURE4DSGIS
MACHINE DEPENDENCIES
The EXTpackedpixels 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 GLINVALIDVALUE error.
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glTexSubImage4DSGIS(3G) OpenGL Reference glTexSubImage4DSGIS(3G)
SEE ALSO
glDrawPixels, glFog, glPixelStore, glPixelTransfer, glTexEnv, glTexGen,
glTexImage4D, glTexParameter.
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