GLINDEXMASK - Online Linux Manual PageSection : 3G

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NAME"glIndexMask − control the writing of individual bits in the color index buffers

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C SPECIFICATIONvoid glIndexMask( GLuint mask )

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PARAMETERSmask  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.

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DESCRIPTION­glIndexMask controls the writing of individual bits in the color index buffers. The least significant n bits of mask, where 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.

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

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ASSOCIATED GETS­glGet with argument ­GL_INDEX_WRITEMASK

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SEE ALSO­glColorMask(3G), ­glDepthMask(3G), ­glDrawBuffer(3G), ­glIndex(3G), ­glIndexPointer(3G), ­glStencilMask(3G) 0

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