Defines an array of color indexes.
OpenGL C bindings library: libGL.a
void glIndexPointer(GLenum type, GLsizei stride, const GLvoid *pointer)
|Specifies the data type of each color index in the array. Symbolic constants GL_UNSIGNED_BYTE, GL_SHORT, GL_INT, GL_FLOAT, or GL_DOUBLE are accepted. The initial value is GL_FLOAT.
|Specifies the byte offset between consecutive color indexes. If stride is zero (the initial value), the color indexes are understood to be tightly packed in the array.
|Specifies a pointer to the first index in the array.
The glIndexPointer subroutine specifies the location and data format of an array of color indexes to use when rendering. The type parameter specifies the data type of each color index and stride gives the byte stride from one color index to the next allowing vertexes 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.)
The parameters type, stride, and pointer are saved as client-side state.
The color index array is initially disabled. To enable and disable the array, call glEnableClientState and glDisableClientState with the argument GL_INDEX_ARRAY. If enabled, the color index 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 primitives by indexing vertexes and vertex attributes and glDrawElements to construct a sequence of primitives by indexing vertexes and vertex attributes.
The glIndexPointer subroutine is available only if the GL version is 1.1 or greater.
The color index array is initially disabled, and it won't be accessed when glArrayElement, glDrawElements or glDrawArrays 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.
The glIndexPointer subroutine is typically implemented on the client side with no protocol.
Since the color index array parameters are client side state, they are not saved or restored by glPushAttrib and glPopAttrib. Use glPushClientAttrib and glPopClientAttrib instead.
The glIndexPointer subroutine is not included in display lists.
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
glGetPointerv with argument GL_INDEX_ARRAY_POINTER
The glArrayElement subroutine, glColorPointer subroutine, glDrawArrays subroutine, glDrawElements subroutine, glEdgeFlagPointer subroutine, glEnable subroutine, glGetPointerv subroutine, glNormalPointer subroutine, glPopClientAttrib subroutine, glPushClientAttrib subroutine, glTexCoordPointer subroutine, glVertexPointer subroutine.