Function draw_on_img_with_opacity 

pub fn draw_on_img_with_opacity(
    base: &mut ImageData,
    diff: &ImageData,
    left: u32,
    top: u32,
    opacity: u8,
) -> Result<()>

Available on crate feature image only.

Draws an image on another image with specified opacity.

• base - The base image to draw on.
• diff - The image to draw with opacity.
• left - The horizontal offset to start drawing the image.
• top - The vertical offset to start drawing the image.
• opacity - The opacity level to apply to the drawn image (0-255