piet 0.8.0

An abstraction for 2D graphics.
Documentation 
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// Copyright 2020 the Piet Authors
// SPDX-License-Identifier: Apache-2.0 OR MIT

//! Show the relationship between the layout rect and the inking/image rect.

use crate::kurbo::{Size, Vec2};
use crate::{Color, Error, RenderContext, Text, TextAttribute, TextLayout, TextLayoutBuilder};

pub const SIZE: Size = Size::new(200., 200.);

static SAMPLE_EN: &str = r#"ḧ́ͥm̾ͭpͭ̒ͦ̎ḧ̐̈̾̆͊
 ch̯͈̙̯̼̠a͚͉o̺̮̳̮̩s̪͇.̥̩̹"#;

const LIGHT_GREY: Color = Color::grey8(0xc0);

pub fn draw<R: RenderContext>(rc: &mut R) -> Result<(), Error> {
    rc.clear(None, LIGHT_GREY);
    let text = rc.text();

    let layout = text
        .new_text_layout(SAMPLE_EN)
        .default_attribute(TextAttribute::FontSize(24.0))
        .build()?;

    let text_pos = Vec2::new(50.0, 50.0);
    let layout_rect = layout.size().to_rect() + text_pos;
    let image_rect = layout.image_bounds() + text_pos;

    rc.fill(layout_rect, &Color::WHITE);
    rc.stroke(image_rect, &Color::BLACK, 0.5);

    rc.draw_text(&layout, text_pos.to_point());

    Ok(())
}