GLTEXCOORDPOINTER()MachTen Programmer’s ManualGLTEXCOORDPOINTER()

NAME
glTexCoordPointer - define an array of texture coordinates

C SPECIFICATION
void glTexCoordPointer( GLint size,
GLenum type,
GLsizei stride,
const GLvoid *pointer )

delim $$

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 coordi-
nate. 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
array elements. If stride is 0, the array ele-
ments are understood to be tightly packed. The
initial value is 0.

pointer Specifies a pointer to the first coordinate of
the first element in the array.

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 element, 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 array element to the next allowing ver-
texes 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.) When a texture coordinate array is
specified, size, type, stride, and pointer are saved
client-side state.

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

Use glDrawArrays to construct a sequence of primitives
(all of the same type) from prespecified vertex and vertex
attribute arrays. Use glArrayElement to specify primi-
tives by indexing vertexes and vertex attributes and
glDrawElements to construct a sequence of primitives by
indexing vertexes and vertex attributes.

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

The texture coordinate array is initially disabled and it
won’t be accessed when
glArrayElement, glDrawElements or glDrawArrays 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 with no protocol.

The texture coordinate array parameters are client-side
state and are therefore not saved or restored by glPushAt-
trib 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
glGetPointerv with argument GL_TEXTURE_COORD_ARRAY_POINTER

SEE ALSO
glArrayElement, glColorPointer, glDrawArrays, glDrawEle-
ments,
glEdgeFlagPointer, glEnable, glGetPointerv, glIndex-
Pointer, glNormalPointer, glPopClientAttrib, glPushClien-
tAttrib, glTexCoord, glVertexPointer

MachTen 2