1991-2006
Silicon Graphics, Inc.
glTexCoordPointer
3G

# glTexCoordPointer

define an array of texture coordinates

## C Specification

                    void glTexCoordPointer
                    GLint size
                    GLenum type
                    GLsizei stride
                    const GLvoid * pointer

## Parameters

`size`

  Specifies the number of coordinates per array element. Must be 1, 2, 3, or 4. The initial value is 4.

`type`

  Specifies the data type of each texture coordinate. Symbolic constants `GL_SHORT`, `GL_INT`, `GL_FLOAT`, or `GL_DOUBLE` are accepted. The initial value is `GL_FLOAT`.

`stride`

  Specifies the byte offset between consecutive texture coordinate sets. If `stride` is 0, the array elements are understood to be tightly packed. The initial value is 0.

`pointer`

  Specifies a pointer to the first coordinate of the first texture coordinate set in the array. The initial value is 0.

## Description

`glTexCoordPointer` specifies the location and data format of an array of texture coordinates to use when rendering. `size` specifies the number of coordinates per texture coordinate set, and must be 1, 2, 3, or 4. `type` specifies the data type of each texture coordinate, and `stride` specifies the byte stride from one texture coordinate set to the next, allowing vertices and attributes to be packed into a single array or stored in separate arrays. (Single-array storage may be more efficient on some implementations; see glInterleavedArrays.)

If a non-zero named buffer object is bound to the `GL_ARRAY_BUFFER` target (see glBindBuffer) while a texture coordinate array is specified, `pointer` is treated as a byte offset into the buffer object's data store. Also, the buffer object binding (`GL_ARRAY_BUFFER_BINDING`) is saved as texture coordinate vertex array client-side state (`GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING`).

When a texture coordinate array is specified, `size`, `type`, `stride`, and `pointer` are saved as client-side state, in addition to the current vertex array buffer object binding.

To enable and disable a texture coordinate array, call glEnableClientState and glDisableClientState with the argument `GL_TEXTURE_COORD_ARRAY`. If enabled, the texture coordinate array is used when glArrayElement, glDrawArrays, glMultiDrawArrays, glDrawElements, glMultiDrawElements, or glDrawRangeElements is called.

## Notes

`glTexCoordPointer` is available only if the GL version is 1.1 or greater.

For OpenGL versions 1.3 and greater, or when the `ARB_multitexture` extension is supported, `glTexCoordPointer` updates the texture coordinate array state of the active client texture unit, specified with glClientActiveTexture.

Each texture coordinate array is initially disabled and isn't accessed when glArrayElement, glDrawElements, glDrawRangeElements, glDrawArrays, glMultiDrawArrays, or glMultiDrawElements is called.

Execution of `glTexCoordPointer` is not allowed between the execution of glBegin and the corresponding execution of glEnd, but an error may or may not be generated. If no error is generated, the operation is undefined.

`glTexCoordPointer` is typically implemented on the client side.

Texture coordinate array parameters are client-side state and are therefore not saved or restored by glPushAttrib and glPopAttrib. Use glPushClientAttrib and glPopClientAttrib instead.

## Errors

`GL_INVALID_VALUE` is generated if `size` is not 1, 2, 3, or 4.

`GL_INVALID_ENUM` is generated if `type` is not an accepted value.

`GL_INVALID_VALUE` is generated if `stride` is negative.

## Associated Gets

glIsEnabled with argument `GL_TEXTURE_COORD_ARRAY`

glGet with argument `GL_TEXTURE_COORD_ARRAY_SIZE`

glGet with argument `GL_TEXTURE_COORD_ARRAY_TYPE`

glGet with argument `GL_TEXTURE_COORD_ARRAY_STRIDE`

glGet with argument `GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING`

glGet with argument `GL_ARRAY_BUFFER_BINDING`

glGetPointerv with argument `GL_TEXTURE_COORD_ARRAY_POINTER`

## See Also

glArrayElement, glBindBuffer, glClientActiveTexture, glColorPointer, glDisableClientState, glDrawArrays, glDrawElements, glDrawRangeElements, glEdgeFlagPointer, glEnableClientState, glFogCoordPointer, glIndexPointer, glInterleavedArrays, glMultiDrawArrays, glMultiDrawElements, glMultiTexCoord, glNormalPointer, glPopClientAttrib, glPushClientAttrib, glSecondaryColorPointer, glTexCoord, glVertexAttribPointer, glVertexPointer

## Copyright

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