fglColorTableParameter(3G) OpenGL Reference fglColorTableParameter(3G)NAME
fglColorTableParameterfv, fglColorTableParameteriv - set color lookup
table parameters
FORTRAN SPECIFICATION
SUBROUTINE fglColorTableParameterfv( INTEGER*4 target,
INTEGER*4 pname,
CHARACTER*8 params )
SUBROUTINE fglColorTableParameteriv( INTEGER*4 target,
INTEGER*4 pname,
CHARACTER*8 params )
PARAMETERS
target The target color table. Must be GL_COLOR_TABLE,
GL_POST_CONVOLUTION_COLOR_TABLE, or
GL_POST_COLOR_MATRIX_COLOR_TABLE.
pname The symbolic name of a texture color lookup table parameter.
Must be one of GL_COLOR_TABLE_SCALE or GL_COLOR_TABLE_BIAS.
params A pointer to an array where the values of the parameters are
stored.
DESCRIPTION
fglColorTableParameter is used to specify the scale factors and bias
terms applied to color components when they are loaded into a color
table. target indicates which color table the scale and bias terms apply
to; it must be set to GL_COLOR_TABLE, GL_POST_CONVOLUTION_COLOR_TABLE, or
GL_POST_COLOR_MATRIX_COLOR_TABLE.
pname must be GL_COLOR_TABLE_SCALE to set the scale factors. In this
case, params points to an array of four values, which are the scale
factors for red, green, blue, and alpha, in that order.
pname must be GL_COLOR_TABLE_BIAS to set the bias terms. In this case,
params points to an array of four values, which are the bias terms for
red, green, blue, and alpha, in that order.
The color tables themselves are specified by calling fglColorTable.
NOTES
fglColorTableParameter is available only if GL_ARB_imaging is returned
from calling fglGetString with an argument of GL_EXTENSIONS.
ERRORS
GL_INVALID_ENUM is generated if target or pname is not an acceptable
value.
Page 1
fglColorTableParameter(3G) OpenGL Reference fglColorTableParameter(3G)
GL_INVALID_OPERATION is generated if fglColorTableParameter is executed
between the execution of fglBegin and the corresponding execution of
fglEnd.
ASSOCIATED GETS
fglGetColorTableParameter
MACHINE DEPENDENCIES
The SGI_color_table extension is not supported on RealityEngine,
RealityEngine2, and VTX systems.
SEE ALSO
fglColorTable, fglPixelTransfer
Page 2