Parameters

Description

glIndexMask 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 glDrawBuffer). Initially, all bits are enabled for writing.

Errors

GL_INVALID_OPERATION is generated if glIndexMask is executed between the execution of glBegin and the corresponding execution of glEnd.

Associated Gets

glGet with argument GL_INDEX_WRITEMASK

See Also

glColorMask, glDepthMask, glDrawBuffer, glIndex, glIndexPointer, glStencilMask