sugarloaf 0.3.0

Sugarloaf is Rio rendering engine, designed to be multiplatform. It is based on WebGPU, Rust library for Desktops and WebAssembly for Web (JavaScript). This project is created and maintained for Rio terminal purposes but feel free to use it.
Documentation 
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// Copyright (c) 2023-present, Raphael Amorim.
//
// This source code is licensed under the MIT license found in the
// LICENSE file in the root directory of this source tree.
//
// text.rs was originally retired from dfrg/swash_demo licensed under MIT
// https://github.com/dfrg/swash_demo/blob/master/LICENSE
//
// Eventually the file had updates to support other features like background-color,
// text color, underline color and etc.

use crate::font_introspector::{GlyphId, NormalizedCoord};
use crate::layout::SpanStyleDecoration;
use crate::sugarloaf::primitives::{DrawableChar, SugarCursor};

/// Properties for a text run.
#[derive(Copy, Clone)]
pub struct TextRunStyle<'a> {
    /// Normalized variation coordinates for the font.
    pub font_coords: &'a [NormalizedCoord],
    /// Font size.
    pub font_size: f32,
    /// Color of the text.
    pub color: [f32; 4],
    /// Background of the text.
    pub background_color: Option<[f32; 4]>,
    /// Baseline of the run.
    pub baseline: f32,
    /// Topline of the run (basically y axis).
    pub topline: f32,
    /// Absolute line height of the run.
    pub line_height: f32,
    /// Padding y
    pub padding_y: f32,
    /// Absolute line height of the run without mod.
    pub line_height_without_mod: f32,
    /// Total advance of the run.
    pub advance: f32,
    /// Underline style.
    pub decoration: Option<SpanStyleDecoration>,
    /// Underline style.
    pub decoration_color: Option<[f32; 4]>,
    /// Cursor style.
    pub cursor: Option<SugarCursor>,
    pub drawable_char: Option<DrawableChar>,
    /// Font metrics for proper underline/strikethrough positioning
    pub underline_offset: f32,
    pub strikeout_offset: f32,
    pub underline_thickness: f32,
    pub x_height: f32,
    /// Font ascent and descent for cursor positioning
    pub ascent: f32,
    pub descent: f32,
}

/// Positioned glyph in a text run.
#[derive(Copy, Clone)]
pub struct Glyph {
    /// Glyph identifier.
    pub id: GlyphId,
    /// X offset of the glyph.
    pub x: f32,
    /// Y offset of the glyph.
    pub y: f32,
}