gltexsubimage4dext(3G)
glTexSubImage4DSGIS - specify a four-dimensional texture subimage
As shipped in IRIX 6.5. First release of IRIX 6.5.
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 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. 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 glEnable and glDisable with argument GL_TEXTURE_4D_SGIS. 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 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 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 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 glIntro for more information on using extensions. 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 glTexImage4D 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 glTexSubImage4DSGIS is executed between the execution of glBegin and the corresponding execution of glEnd. ASSOCIATED GETS glGetTexImage glIsEnabled 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. SEE ALSO glDrawPixels, glFog, glPixelStore, glPixelTransfer, glTexEnv, glTexGen, glTexImage4D, glTexParameter.