rustmotion-components 0.7.0

Component library for rustmotion (51 components)
Documentation 
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use schemars::JsonSchema;
use serde::{Deserialize, Serialize};
use skia_safe::{Canvas, Paint, Rect};

use rustmotion_core::css::CssStyle;
use rustmotion_core::engine::animator::AnimatedProperties;
use rustmotion_core::engine::layout_pass::BoxLayout;
use rustmotion_core::engine::renderer::asset_cache;
use rustmotion_core::schema::{ImageFit, TimelineStep};
use rustmotion_core::traits::{PaintCtx, Painter, TimingConfig};

#[derive(Debug, Serialize, Deserialize, JsonSchema)]
pub struct Image {
    pub src: String,
    #[serde(default)]
    pub fit: ImageFit,
    #[serde(flatten)]
    pub timing: TimingConfig,
    #[serde(default)]
    pub style: CssStyle,
    #[serde(default)]
    pub timeline: Vec<TimelineStep>,
    #[serde(default)]
    pub stagger: Option<f32>,
}

rustmotion_core::impl_traits!(Image {
    Animatable => animation,
    Timed => timing,
    Styled => style,
});

impl Painter for Image {
    fn paint_content(
        &self,
        canvas: &Canvas,
        layout: &BoxLayout,
        _props: &AnimatedProperties,
        _ctx: &PaintCtx,
    ) {
        let cache = asset_cache();
        let img = if let Some(cached) = cache.get(&self.src) {
            cached.clone()
        } else {
            let Ok(data) = std::fs::read(&self.src) else {
                return;
            };
            let skia_data = skia_safe::Data::new_copy(&data);
            let Some(decoded) = skia_safe::Image::from_encoded(skia_data) else {
                return;
            };
            cache.insert(self.src.clone(), decoded.clone());
            decoded
        };

        let img_w = img.width() as f32;
        let img_h = img.height() as f32;
        let target_w = layout.width;
        let target_h = layout.height;

        let (draw_w, draw_h, offset_x, offset_y) = match self.fit {
            ImageFit::Fill => (target_w, target_h, 0.0, 0.0),
            ImageFit::Contain => {
                let scale = (target_w / img_w).min(target_h / img_h);
                let w = img_w * scale;
                let h = img_h * scale;
                (w, h, (target_w - w) / 2.0, (target_h - h) / 2.0)
            }
            ImageFit::Cover => {
                let scale = (target_w / img_w).max(target_h / img_h);
                let w = img_w * scale;
                let h = img_h * scale;
                (w, h, (target_w - w) / 2.0, (target_h - h) / 2.0)
            }
        };

        let dst = Rect::from_xywh(offset_x, offset_y, draw_w, draw_h);
        let paint = Paint::default();

        if matches!(self.fit, ImageFit::Cover) {
            canvas.save();
            canvas.clip_rect(
                Rect::from_xywh(0.0, 0.0, target_w, target_h),
                skia_safe::ClipOp::Intersect,
                true,
            );
            canvas.draw_image_rect(img, None, dst, &paint);
            canvas.restore();
        } else {
            canvas.draw_image_rect(img, None, dst, &paint);
        }
    }
}