Struct passpartout_printer::image_drawer::ImageDrawer

pub struct ImageDrawer<'a> { /* private fields */ }

A structure that provides means to draw whole images to the easel.

Implementations

impl<'a> ImageDrawer<'a>

pub fn new(easel: &'a mut Easel, size_x: u32, size_y: u32) -> ImageDrawer<'a>

pub fn draw_top_border(&mut self) -> Result<(), Box<dyn Error>>

Draw the top white border for centering the image along the y-axis.

If the image completely fills the y axis of the easel, this method does no drawing.

pub fn handle_pixel(
    &mut self,
    rgba: &mut Rgba<u8>,
    x: u32,
    y: u32
) -> Result<(), Box<dyn Error>>

Process the next pixel from a given image.

Pixels are not drawn to the screen unless we’ve hit the end of a row and must draw or there is a color change where we will draw everything up to the current pixel. If you want to draw a pixel by itself, use Easel::draw_pixel() instead.

Arguments

• rgba: The RGBA pixel to handle.
• x: The x coordinate of the pixel in image coordinates.
• y: The x coordinate of the pixel in image coordinates.

pub fn cleanup_image(&mut self) -> Result<(), Box<dyn Error>>

Draw the bottom white border and clean up the horizontal edges.