GLGETCOLORTABLEPARAMETER - Online Linux Manual PageSection : 3G
NAME"glGetColorTableParameterfv, glGetColorTableParameteriv − get color lookup table parameters
C SPECIFICATIONvoid glGetColorTableParameterfv( GLenum target, GLenum pname, GLfloat *params )void glGetColorTableParameteriv( GLenum target, GLenum pname, GLint *params )
PARAMETERStarget  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 parameter will be stored.
DESCRIPTIONReturns 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 factors 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. 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. ParameterNMeaning ­GL_COLOR_TABLE_FORMAT1Internal (e.g. ­GL_RGBA) ­GL_COLOR_TABLE_WIDTH1Number of elements in table ­GL_COLOR_TABLE_RED_SIZE1Size of red component, in bits ­GL_COLOR_TABLE_GREEN_SIZE1Size of green component ­GL_COLOR_TABLE_BLUE_SIZE1Size of blue component ­GL_COLOR_TABLE_ALPHA_SIZE1Size of alpha component ­GL_COLOR_TABLE_LUMINANCE_SIZE1Size of luminance component ­GL_COLOR_TABLE_INTENSITY_SIZE1Size of intensity component
NOTES­glGetColorTableParameter is present only if ­GL_ARB_imaging is returned when ­glGetString is called with an argument of ­GL_EXTENSIONS.
ERRORS­GL_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 ALSO­glColorTable(3G), ­glTexParameter(3G), ­glColorTableParameter(3G) 0
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