set_contrast_full
Description:
The range for each component is [-1.0, 1.0] where 0.0 designates no change, values below 0.0 mean a decrease in contrast, and values above indicate an increase.
Parameters:
| this | |
| red |
red component of the change in contrast |
| green |
green component of the change in contrast |
| blue |
blue component of the change in contrast |