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glIndexPointer — define an array of color indexes
void glIndexPointer( | GLenum | type, |
| GLsizei | stride, | |
| const GLvoid * | pointer); |
type
Specifies the data type of each color index in the array.
Symbolic constants
GL_UNSIGNED_BYTE,
GL_SHORT,
GL_INT,
GL_FLOAT,
and GL_DOUBLE
are accepted. The initial value is GL_FLOAT.
stride
Specifies the byte offset between consecutive color indexes.
If stride is 0, the color indexes are understood to
be tightly packed in the array. The initial value is 0.
pointerSpecifies a pointer to the first index in the array. The initial value is 0.
glIndexPointer specifies the location and data format of an array of color indexes
to use when rendering.
type specifies the data type of
each color index and stride specifies the byte stride from one
color index to the next, allowing vertices and attributes
to be packed into a single array or stored in separate arrays.
If a non-zero named buffer object is bound to the GL_ARRAY_BUFFER target
(see glBindBuffer) while a color index 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 color index vertex array
client-side state (GL_INDEX_ARRAY_BUFFER_BINDING).
When a color index array is specified,
type, stride, and pointer are saved as client-side
state, in addition to the current vertex array buffer object binding.
To enable and disable the color index array, call
glEnableClientState and glDisableClientState with the argument
GL_INDEX_ARRAY. If
enabled, the color index array is used
when glDrawArrays, glMultiDrawArrays, glDrawElements,
glMultiDrawElements, glDrawRangeElements, or
glArrayElement is called.
glIndexPointer is available only if the GL version is 1.1 or greater.
Color indexes are not supported for interleaved vertex array formats (see glInterleavedArrays).
The color index array is initially disabled and isn't accessed when glArrayElement, glDrawElements, glDrawRangeElements, glDrawArrays, glMultiDrawArrays, or glMultiDrawElements is called.
Execution of glIndexPointer is not allowed between
glBegin and the corresponding glEnd,
but an error may or may not be generated. If an error is not generated,
the operation is undefined.
glIndexPointer is typically implemented on the client side.
Color index array parameters are client-side state and are therefore not saved or restored by glPushAttrib and glPopAttrib. Use glPushClientAttrib and glPopClientAttrib instead.
GL_INVALID_ENUM is generated if type is not an accepted value.
GL_INVALID_VALUE is generated if stride is negative.
glIsEnabled with argument GL_INDEX_ARRAY
glGet with argument GL_INDEX_ARRAY_TYPE
glGet with argument GL_INDEX_ARRAY_STRIDE
glGet with argument GL_INDEX_ARRAY_BUFFER_BINDING
glGet with argument GL_ARRAY_BUFFER_BINDING
glGetPointerv with argument GL_INDEX_ARRAY_POINTER
glArrayElement, glBindBuffer, glColorPointer, glDisableClientState, glDrawArrays, glDrawElements, glDrawRangeElements, glEdgeFlagPointer, glEnableClientState, glFogCoordPointer, glIndex, glInterleavedArrays, glMultiDrawArrays, glMultiDrawElements, glNormalPointer, glPopClientAttrib, glPushClientAttrib, glSecondaryColorPointer, glTexCoordPointer, glVertexAttribPointer, glVertexPointer
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/.