Struct Canvas 

pub struct Canvas<'r> {
    pub w: u32,
    pub h: u32,
    pub rgba: Vec<u8>,
    /* private fields */
}

An RGBA canvas w × h physical pixels.

Fields

w: u32

h: u32

rgba: Vec<u8>

Implementations

impl<'r> Canvas<'r>

pub fn new(gui_w: u32, gui_h: u32, scale: u32, res: &'r Resources) -> Self

pub fn font(&mut self, id: &str) -> Arc<Font>

pub fn fill(&mut self, [x1, y1, x2, y2]: [f32; 4], top: u32, bottom: u32)

Fills [x1, y1, x2, y2] (GUI pixels), top’s colour fading to bottom’s.

pub fn text(&mut self, text: &str, at: [f32; 2], style: &TextStyle<'_>)

Font.drawInBatch: the shadow pass (offset, color / 4), then the text, at whole pixels (at’s rounded down) — scaled, the host scales the pose: no rounding.

pub fn draw(&mut self, op: &DrawOp)

pub fn png(&self) -> Result<Vec<u8>, String>

pub fn png_url(&self) -> Option<String>

The canvas as a PNG data: URL (none if it doesn’t encode).