ScenePrimitive API#

#[non_exhaustive]
pub enum ScenePrimitive {
    Rect(RectPrimitive),
    Text(TextPrimitive),
    Line(LinePrimitive),
    Polygon(PolygonPrimitive),
    Image(ImagePrimitive),
}

pub struct RectPrimitive {
    pub x: f64,
    pub y: f64,
    pub width: f64,
    pub height: f64,
    pub fill: Color,
    pub stroke: Option<Color>,
    pub stroke_width: f64,
    pub corner_radius: f64,
}

pub struct TextPrimitive {
    pub x: f64,
    pub y: f64,
    pub text: String,
    pub color: Color,
    pub font_size: f64,
    pub bold: bool,
    pub clip: Option<[f64; 4]>,
    pub align: TextAlign,
}

pub struct LinePrimitive {
    pub x1: f64,
    pub y1: f64,
    pub x2: f64,
    pub y2: f64,
    pub color: Color,
    pub width: f64,
}

pub struct PolygonPrimitive {
    pub points: Vec<[f64; 2]>,
    pub fill: Color,
    pub corner_radius: f64,
}

pub struct ImagePrimitive {
    pub url: String,
    pub x: f64,
    pub y: f64,
    pub width: f64,
    pub height: f64,
    pub corner_radius: f64,
    pub clip: Option<[f64; 4]>,
}

pub struct Color { pub r: u8, pub g: u8, pub b: u8, pub a: u8 }

impl Color {
    pub const fn rgb(r: u8, g: u8, b: u8) -> Self;
    pub const fn rgba(r: u8, g: u8, b: u8, a: u8) -> Self;
    pub fn to_css(self) -> String;  // "rgba(r,g,b,a)"
}

pub enum TextAlign {
    Left,    // default
    Center,
    Right,
}

pub struct SceneFrame {
    primitives: Vec<ScenePrimitive>,
}

impl SceneFrame {
    pub fn primitives(&self) -> &[ScenePrimitive];
}

pub struct SceneBuilder {
    dpr: f64,
    theme: Theme,
}

impl SceneBuilder {
    pub fn new(dpr: f64, theme: Theme) -> Self;
    pub fn build(&self, state: &GridState, drag: Option<&ColumnDragHint>) -> SceneFrame;
}