plgcolbga
( | r, |
g, | |
b, | |
alpha) ; |
Returns the background color (cmap0[0]) by 8-bit RGB value and double alpha transparency value.
r
(PLINT *
, output)
Pointer to an unsigned 8-bit integer (0-255) representing the degree of red in the color.
g
(PLINT *
, output)
Pointer to an unsigned 8-bit integer (0-255) representing the degree of green in the color.
b
(PLINT *
, output)
Pointer to an unsigned 8-bit integer (0-255) representing the degree of blue in the color.
alpha
(PLFLT *
, output)
Pointer to PLFLT alpha transparency value.
This function is used in example 31.