Static Sub IndexMask ( Mask As Integer )

Control the writing of individual bits in the color index buffers.

Parameters

mask

Specifies a bit mask to enable and disable the writing of individual bits in the color index buffers. Initially, the mask is all 1's.

Description

Gl.IndexMask controls the writing of individual bits in the color index buffers. The least significant $\mathit{n}$ bits of mask, where $\mathit{n}$ is the number of bits in a color index buffer, specify a mask. Where a 1 (one) appears in the mask, it's possible to write to the corresponding bit in the color index buffer (or buffers). Where a 0 (zero) appears, the corresponding bit is write-protected.

This mask is used only in color index mode, and it affects only the buffers currently selected for writing (see Gl.DrawBuffer). Initially, all bits are enabled for writing.

Errors

Gl.INVALID_OPERATION is generated if Gl.IndexMask is executed between the execution of Gl.Begin and the corresponding execution of Gl.End.

Associated Gets

Gl.Get with argument Gl.INDEX_WRITEMASK

See original documentation on OpenGL website