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.