Function
Bablspace_get_rgb_luminance
Declaration [src]
void
babl_space_get_rgb_luminance (
const Babl* space,
double* red_luminance,
double* green_luminance,
double* blue_luminance
)
Description [src]
Retrieve the relevant RGB luminance constants for a babl space.
Note: these luminance coefficients should only ever be used on linear data.
If your input space is non-linear, you should convert your pixel values to
the linearized variant of space before making any computation with these
coefficients. See #83.
Parameters
space-
Type:
BablA BablSpace.
The data is owned by the caller of the function. red_luminance-
Type:
double*Location for the red luminance factor.
The argument will be set by the function. The argument can be NULL. green_luminance-
Type:
double*Location for the green luminance factor.
The argument will be set by the function. The argument can be NULL. blue_luminance-
Type:
double*Location for the blue luminance factor.
The argument will be set by the function. The argument can be NULL.