ling-ui 2030.0.0

Ling UI framework — retained-mode widgets and flex layout
Documentation 
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//! Software renderer stub for ling-ui.

use crate::widget::{RenderCtx, Widget};

pub struct SoftwareRenderer {
    pub width:  u32,
    pub height: u32,
    pub buffer: Vec<u32>,
}

impl SoftwareRenderer {
    pub fn new(width: u32, height: u32) -> Self {
        Self { width, height, buffer: vec![0xFF_18_18_18; (width * height) as usize] }
    }

    pub fn clear(&mut self, color: u32) {
        self.buffer.fill(color);
    }

    pub fn render_widget(&mut self, widget: &dyn Widget) {
        let mut ctx = RenderCtx {
            width:  self.width  as f32,
            height: self.height as f32,
        };
        widget.render(&mut ctx);
    }

    pub fn pixels(&self) -> &[u32] { &self.buffer }
}