[−][src]Function photon_rs::colour_spaces::darken_hsl
pub fn darken_hsl(img: &mut PhotonImage, level: f32)
Darken the image by a specified amount in the HSL colour space.
Arguments
img
- A PhotonImage.level
- Float value from 0 to 1 representing the level to which to darken the image by. Thelevel
must be from 0 to 1 in floating-point,f32
format. Darkening by 80% would be represented by alevel
of 0.8
Example
// For example to darken an image by 10% in the HSL colour space: use photon::color_spaces::darken_hsl; // Open the image. A PhotonImage is returned. let img: PhotonImage = open_image("images/flowers.PNG"); darken_hsl(&mut img, 0.1);