GLGETCOLORTABLEPARAMEUNIX3Programmer'GLGETCOLORTABLEPARAMETER(3G)
NAME
glGetColorTableParameterfv, glGetColorTableParameteriv - get
color lookup table parameters
C SPECIFICATION
void glGetColorTableParameterfv( GLenum target,
GLenum pname,
GLfloat *params )
void glGetColorTableParameteriv( GLenum target,
GLenum pname,
GLint *params )
PARAMETERS
target The target color table. Must be GL_COLOR_TABLE,
GL_POST_CONVOLUTION_COLOR_TABLE,
GL_POST_COLOR_MATRIX_COLOR_TABLE,
GL_PROXY_COLOR_TABLE,
GL_PROXY_POST_CONVOLUTION_COLOR_TABLE,
GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE.
pname The symbolic name of a color lookup table parameter.
Must be one of GL_COLOR_TABLE_BIAS,
GL_COLOR_TABLE_SCALE, GL_COLOR_TABLE_FORMAT,
GL_COLOR_TABLE_WIDTH, GL_COLOR_TABLE_RED_SIZE,
GL_COLOR_TABLE_GREEN_SIZE, GL_COLOR_TABLE_BLUE_SIZE,
GL_COLOR_TABLE_ALPHA_SIZE,
GL_COLOR_TABLE_LUMINANCE_SIZE, or
GL_COLOR_TABLE_INTENSITY_SIZE.
params A pointer to an array where the values of the param-
eter will be stored.
DESCRIPTION
Returns parameters specific to color table target.
When pname is set to GL_COLOR_TABLE_SCALE or
GL_COLOR_TABLE_BIAS, glGetColorTableParameter returns the
color table scale or bias parameters for the table specified
by target. For these queries, target must be set to
GL_COLOR_TABLE, GL_POST_CONVOLUTION_COLOR_TABLE, or
GL_POST_COLOR_MATRIX_COLOR_TABLE and params points to an
array of four elements, which receive the scale or bias fac-
tors for red, green, blue, and alpha, in that order.
glGetColorTableParameter can also be used to retrieve the
and size parameters for a color table. For these queries,
set target to either the color table target or the proxy
color table target. The and size parameters are set by
glColorTable.
MirBSD #10-current Printed 2021-12-07 1
GLGETCOLORTABLEPARAMEUNIX3Programmer'GLGETCOLORTABLEPARAMETER(3G)
The following table lists the and size parameters that may
be queried. For each symbolic constant listed below for
pname, params must point to an array of the given length,
and receive the values indicated.
__________________________________________________________________
Parameter N Meaning
__________________________________________________________________
GL_COLOR_TABLE_FORMAT 1 Internal (e.g. GL_RGBA)
GL_COLOR_TABLE_WIDTH 1 Number of elements in table
GL_COLOR_TABLE_RED_SIZE 1 Size of red component, in bits
GL_COLOR_TABLE_GREEN_SIZE 1 Size of green component
GL_COLOR_TABLE_BLUE_SIZE 1 Size of blue component
GL_COLOR_TABLE_ALPHA_SIZE 1 Size of alpha component
GL_COLOR_TABLE_LUMINANCE_SIZE 1 Size of luminance component
GL_COLOR_TABLE_INTENSITY_SIZE 1 Size of intensity component
__________________________________________________________________
NOTES
glGetColorTableParameter is present only if GL_ARB_imaging
is returned when glGetString is called with an argument of
GL_EXTENSIONS.
ERRORS
GL_INVALID_ENUM is generated if target or pname is not an
acceptable value.
GL_INVALID_OPERATION is generated if
glGetColorTableParameter is executed between the execution
of glBegin and the corresponding execution of glEnd.
SEE ALSO
glColorTable(3G), glTexParameter(3G),
glColorTableParameter(3G)
MirBSD #10-current Printed 2021-12-07 2