glColorTableParameter(3G) OpenGL Reference glColorTableParameter(3G)NAME
glColorTableParameterfv, glColorTableParameteriv - set color lookup table
parameters
C SPECIFICATION
void glColorTableParameterfv( GLenum target,
GLenum pname,
const GLfloat *params )
void glColorTableParameteriv( GLenum target,
GLenum pname,
const GLint *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
glColorTableParameter 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 glColorTable.
NOTES
glColorTableParameter is available only if GL_ARB_imaging is returned
from calling glGetString with an argument of GL_EXTENSIONS.
ERRORS
GL_INVALID_ENUM is generated if target or pname is not an acceptable
value.
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glColorTableParameter(3G) OpenGL Reference glColorTableParameter(3G)
GL_INVALID_OPERATION is generated if glColorTableParameter is executed
between the execution of glBegin and the corresponding execution of
glEnd.
ASSOCIATED GETS
glGetColorTableParameter
MACHINE DEPENDENCIES
The SGI_color_table extension is not supported on RealityEngine,
RealityEngine2, and VTX systems.
SEE ALSO
glColorTable, glPixelTransfer
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