GLGETCOLORTABLE(3G) UNIX Programmer's Manual GLGETCOLORTABLE(3G)
NAME
glGetColorTable - retrieve contents of a color lookup table
C SPECIFICATION
void glGetColorTable( GLenum target,
GLenum format,
GLenum type,
GLvoid *table )
PARAMETERS
target Must be GL_COLOR_TABLE,
GL_POST_CONVOLUTION_COLOR_TABLE, or
GL_POST_COLOR_MATRIX_COLOR_TABLE.
format The of the pixel data in table. The possible values
are GL_RED, GL_GREEN, GL_BLUE, GL_ALPHA,
GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_RGB, GL_BGR,
GL_RGBA, and GL_BGRA.
type The type of the pixel data in table. Symbolic con-
stants GL_UNSIGNED_BYTE, GL_BYTE, GL_BITMAP,
GL_UNSIGNED_SHORT, GL_SHORT, GL_UNSIGNED_INT,
GL_INT, GL_FLOAT, GL_UNSIGNED_BYTE_3_3_2,
GL_UNSIGNED_BYTE_2_3_3_REV, GL_UNSIGNED_SHORT_5_6_5,
GL_UNSIGNED_SHORT_5_6_5_REV,
GL_UNSIGNED_SHORT_4_4_4_4,
GL_UNSIGNED_SHORT_4_4_4_4_REV,
GL_UNSIGNED_SHORT_5_5_5_1,
GL_UNSIGNED_SHORT_1_5_5_5_REV,
GL_UNSIGNED_INT_8_8_8_8,
GL_UNSIGNED_INT_8_8_8_8_REV,
GL_UNSIGNED_INT_10_10_10_2, and
GL_UNSIGNED_INT_2_10_10_10_REV are accepted.
table Pointer to a one-dimensional array of pixel data
containing the contents of the color table.
DESCRIPTION
glGetColorTable returns in table the contents of the color
table specified by target. No pixel transfer operations are
performed, but pixel storage modes that are applicable to
glReadPixels are performed.
Color components that are requested in the specified format,
but which are not included in the internal
of the color lookup table, are returned as zero. The
assignments of internal color components to the components
requested by format are
MirBSD #10-current Printed 2021-12-07 1
GLGETCOLORTABLE(3G) UNIX Programmer's Manual GLGETCOLORTABLE(3G)
________________________________________
Internal Component Resulting Component
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red red
green green
blue blue
alpha alpha
luminance red
intensity red
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NOTES
glGetColorTable 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 is not one of the
allowable values.
GL_INVALID_ENUM is generated if format is not one of the
allowable values.
GL_INVALID_ENUM is generated if type is not one of the
allowable values.
GL_INVALID_OPERATION is generated if type is one of
GL_UNSIGNED_BYTE_3_3_2, GL_UNSIGNED_BYTE_2_3_3_REV,
GL_UNSIGNED_SHORT_5_6_5, or GL_UNSIGNED_SHORT_5_6_5_REV and
format is not GL_RGB.
GL_INVALID_OPERATION is generated if type is one of
GL_UNSIGNED_SHORT_4_4_4_4, GL_UNSIGNED_SHORT_4_4_4_4_REV,
GL_UNSIGNED_SHORT_5_5_5_1, GL_UNSIGNED_SHORT_1_5_5_5_REV,
GL_UNSIGNED_INT_8_8_8_8, GL_UNSIGNED_INT_8_8_8_8_REV,
GL_UNSIGNED_INT_10_10_10_2, or
GL_UNSIGNED_INT_2_10_10_10_REV and format is neither GL_RGBA
nor GL_BGRA.
GL_INVALID_OPERATION is generated if glGetColorTable is exe-
cuted between the execution of glBegin and the corresponding
execution of glEnd.
SEE ALSO
glColorTable(3G), glColorTableParameter(3G),
glGetColorTableParameter(3G)
MirBSD #10-current Printed 2021-12-07 2