MirOS Manual: glGetColorTableParameter(3), glGetColorTableParameterfv(3), glGetColorTableParameteriv(3)


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.

MirOS BSD #10-current  Printed 03.04.2017                       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)

MirOS BSD #10-current  Printed 03.04.2017                       2

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