Struct Canvas 

pub struct Canvas<'a> {
    pub pixels: &'a mut [u8],
    pub width: u32,
    pub height: u32,
    pub scale: f32,
    pub format: PixelFormat,
    pub age: &'a mut BufferAge,
}

A buffer to draw a window into.

Fields

pixels: &'a mut [u8]

The buffer’s memory: width * height pixels of 4 bytes, row by row.

width: u32

The width in pixels: the window’s logical width times scale, rounded halfway away from zero, as wp_fractional_scale_v1 says. The window’s edge is drawn at the buffer’s edge either way.

height: u32

The height in pixels, likewise.

scale: f32

Physical pixels per logical pixel.

format: PixelFormat

How the buffer stores pixels.

age: &'a mut BufferAge

The frame the buffer last held, updated by the draw.