GLCLEARINDEX() MachTen Programmer’s Manual GLCLEARINDEX()

NAME
glClearIndex - specify the clear value for the color index
buffers

C SPECIFICATION
void glClearIndex( GLfloat c )

delim $$

PARAMETERS
c Specifies the index used when the color index buffers
are cleared. The initial value is 0.

DESCRIPTION
glClearIndex specifies the index used by glClear to clear
the color index buffers. c is not clamped. Rather, c is
converted to a fixed-point value with unspecified preci-
sion to the right of the binary point. The integer part
of this value is then masked with $2 sup m -1$, where $m$
is the number of bits in a color index stored in the frame
buffer.

ERRORS
GL_INVALID_OPERATION is generated if glClearIndex is exe-
cuted between the execution of glBegin and the correspond-
ing execution of glEnd.

ASSOCIATED GETS
glGet with argument GL_INDEX_CLEAR_VALUE
glGet with argument GL_INDEX_BITS

SEE ALSO
glClear

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