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 |
Babl |
A BablSpace. |
|
The data is owned by the caller of the function. | |
red_luminance |
double* |
Location for the red luminance factor. |
|
The argument will be set by the function. | |
The argument can be NULL . | |
green_luminance |
double* |
Location for the green luminance factor. |
|
The argument will be set by the function. | |
The argument can be NULL . | |
blue_luminance |
double* |
Location for the blue luminance factor. |
|
The argument will be set by the function. | |
The argument can be NULL . |