1991-2006
Silicon Graphics, Inc.
2010-2013
Khronos Group
glTexSubImage3D
3G

# glTexSubImage3D

specify a three-dimensional texture subimage

## C Specification

                    void glTexSubImage3D
                    GLenum target
                    GLint level
                    GLint xoffset
                    GLint yoffset
                    GLint zoffset
                    GLsizei width
                    GLsizei height
                    GLsizei depth
                    GLenum format
                    GLenum type
                    const GLvoid * data

## Parameters

`target`

  Specifies the target texture. Must be `GL_TEXTURE_3D` or `GL_TEXTURE_2D_ARRAY`.

`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.

`width`

  Specifies the width of the texture subimage.

`height`

  Specifies the height of the texture subimage.

`depth`

  Specifies the depth of the texture subimage.

`format`

  Specifies the format of the pixel data. The following symbolic values are accepted: `GL_RED`, `GL_RG`, `GL_RGB`, `GL_BGR`, `GL_RGBA`, `GL_DEPTH_COMPONENT`, and `GL_STENCIL_INDEX`.

`type`

  Specifies the data type of the pixel data. The following symbolic values are accepted: `GL_UNSIGNED_BYTE`, `GL_BYTE`, `GL_UNSIGNED_SHORT`, `GL_SHORT`, `GL_UNSIGNED_INT`, `GL_INT`, `GL_FLOAT`, `GL_UNSIGNED_BYTE_3_3_2`, `GL_UNSIGNED_BYTE_2_3_3_REV`, `GL_UNSIGNED_SHORT_5_6_5`, `GL_UNSIGNED_SHORT_5_6_5_REV`, `GL_UNSIGNED_SHORT_4_4_4_4`, `GL_UNSIGNED_SHORT_4_4_4_4_REV`, `GL_UNSIGNED_SHORT_5_5_5_1`, `GL_UNSIGNED_SHORT_1_5_5_5_REV`, `GL_UNSIGNED_INT_8_8_8_8`, `GL_UNSIGNED_INT_8_8_8_8_REV`, `GL_UNSIGNED_INT_10_10_10_2`, and `GL_UNSIGNED_INT_2_10_10_10_REV`.

`data`

  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.

`glTexSubImage3D` redefines a contiguous subregion of an existing three-dimensional or two-dimensioanl array texture image. The texels referenced by `data` 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, and z indices `zoffset` and zoffset + depth - 1 , inclusive. For three-dimensional textures, the z index refers to the third dimension. For two-dimensional array textures, the z index refers to the slice index. 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 a non-zero named buffer object is bound to the `GL_PIXEL_UNPACK_BUFFER` target (see glBindBuffer) while a texture image is specified, `data` is treated as a byte offset into the buffer object's data store.

## Notes

The glPixelStore modes affect texture images.

`glTexSubImage3D` specifies a three-dimensional or two-dimenaional array subtexture for the current texture unit, specified with glActiveTexture.

`GL_STENCIL_INDEX` is accepted for `format` only if the GL version is 4.4 or higher.

## Errors

`GL_INVALID_ENUM` is generated if /`target` is not `GL_TEXTURE_3D` or `GL_TEXTURE_2D_ARRAY`.

`GL_INVALID_ENUM` is generated if `format` is not an accepted format constant.

`GL_INVALID_ENUM` is generated if `type` is not a type constant.

`GL_INVALID_VALUE` is generated if `level` is less than 0.

`GL_INVALID_VALUE` may be generated if `level` is greater than log 2 max, where max is the returned value of `GL_MAX_TEXTURE_SIZE`.

`GL_INVALID_VALUE` is generated if xoffset < - b , xoffset + width > w - b , yoffset < - b , or yoffset + height > h - b , or zoffset < - b , or zoffset + depth > d - b , where w is the `GL_TEXTURE_WIDTH`, h is the `GL_TEXTURE_HEIGHT`, d is the `GL_TEXTURE_DEPTH` and b is the border width of the texture image being modified. Note that w, h, and d include twice the border width.

`GL_INVALID_VALUE` is generated if `width`, `height`, or `depth` is less than 0.

`GL_INVALID_OPERATION` is generated if the texture array has not been defined by a previous glTexImage3D or glTexStorage3D operation.

`GL_INVALID_OPERATION` is generated if `type` is one of `GL_UNSIGNED_BYTE_3_3_2`, `GL_UNSIGNED_BYTE_2_3_3_REV`, `GL_UNSIGNED_SHORT_5_6_5`, or `GL_UNSIGNED_SHORT_5_6_5_REV` and `format` is not `GL_RGB`.

`GL_INVALID_OPERATION` is generated if `type` is one of `GL_UNSIGNED_SHORT_4_4_4_4`, `GL_UNSIGNED_SHORT_4_4_4_4_REV`, `GL_UNSIGNED_SHORT_5_5_5_1`, `GL_UNSIGNED_SHORT_1_5_5_5_REV`, `GL_UNSIGNED_INT_8_8_8_8`, `GL_UNSIGNED_INT_8_8_8_8_REV`, `GL_UNSIGNED_INT_10_10_10_2`, or `GL_UNSIGNED_INT_2_10_10_10_REV` and `format` is neither `GL_RGBA` nor `GL_BGRA`.

`GL_INVALID_OPERATION` is generated if `format` is `GL_STENCIL_INDEX` and the base internal format is not `GL_STENCIL_INDEX`.

`GL_INVALID_OPERATION` is generated if a non-zero buffer object name is bound to the `GL_PIXEL_UNPACK_BUFFER` target and the buffer object's data store is currently mapped.

`GL_INVALID_OPERATION` is generated if a non-zero buffer object name is bound to the `GL_PIXEL_UNPACK_BUFFER` target and the data would be unpacked from the buffer object such that the memory reads required would exceed the data store size.

`GL_INVALID_OPERATION` is generated if a non-zero buffer object name is bound to the `GL_PIXEL_UNPACK_BUFFER` target and `data` is not evenly divisible into the number of bytes needed to store in memory a datum indicated by `type`.

## Associated Gets

glGetTexImage

glGet with argument `GL_PIXEL_UNPACK_BUFFER_BINDING`

## See Also

glActiveTexture, glCopyTexImage1D, glCopyTexImage2D, glCopyTexSubImage1D, glCopyTexSubImage2D, glCopyTexSubImage3D, glPixelStore, glTexImage1D, glTexImage2D, glTexImage3D, glTexSubImage1D, glTexSubImage2D, glTexParameter

## Copyright

Copyright 1991-2006 Silicon Graphics, Inc. Copyright 2010-2013 Khronos Group. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.