feat: video renderer adapter w/ slides + charts + ffmpeg

crates/adapters/wrapup-renderer/src/slides.rs

@@ -0,0 +1,97 @@
+use domain::errors::DomainError;
+use domain::models::wrapup::WrapUpReport;
+use image::{Rgba, RgbaImage};
+
+const BG_COLOR: Rgba<u8> = Rgba([26, 26, 36, 255]); // dark blue-gray
+const _PRIMARY: Rgba<u8> = Rgba([229, 192, 52, 255]); // gold #e5c034
+const _TEXT_COLOR: Rgba<u8> = Rgba([255, 255, 255, 255]); // white
+
+fn to_png(img: &RgbaImage) -> Result<Vec<u8>, DomainError> {
+    let mut buf = Vec::new();
+    img.write_to(
+        &mut std::io::Cursor::new(&mut buf),
+        image::ImageFormat::Png,
+    )
+    .map_err(|e| DomainError::InfrastructureError(e.to_string()))?;
+    Ok(buf)
+}
+
+fn fill_background(width: u32, height: u32) -> RgbaImage {
+    RgbaImage::from_pixel(width, height, BG_COLOR)
+}
+
+pub fn render_hero_slide(
+    _report: &WrapUpReport,
+    width: u32,
+    height: u32,
+) -> Result<Vec<u8>, DomainError> {
+    let img = fill_background(width, height);
+    // MVP: solid background. Text overlay added with font rendering later.
+    to_png(&img)
+}
+
+pub fn render_ratings_slide(
+    _report: &WrapUpReport,
+    width: u32,
+    height: u32,
+) -> Result<Vec<u8>, DomainError> {
+    let img = fill_background(width, height);
+    to_png(&img)
+}
+
+pub fn render_directors_slide(
+    _report: &WrapUpReport,
+    width: u32,
+    height: u32,
+) -> Result<Vec<u8>, DomainError> {
+    let img = fill_background(width, height);
+    to_png(&img)
+}
+
+pub fn render_actors_slide(
+    _report: &WrapUpReport,
+    width: u32,
+    height: u32,
+) -> Result<Vec<u8>, DomainError> {
+    let img = fill_background(width, height);
+    to_png(&img)
+}
+
+pub fn render_highlights_slide(
+    _report: &WrapUpReport,
+    width: u32,
+    height: u32,
+) -> Result<Vec<u8>, DomainError> {
+    let img = fill_background(width, height);
+    to_png(&img)
+}
+
+pub fn render_mosaic_slide(
+    posters: &[(String, Vec<u8>)],
+    width: u32,
+    height: u32,
+) -> Result<Vec<u8>, DomainError> {
+    let mut canvas = fill_background(width, height);
+
+    let cols = 4u32;
+    let thumb_w = width / cols;
+    let thumb_h = (thumb_w * 3) / 2; // 2:3 poster ratio
+
+    for (i, (_, bytes)) in posters.iter().enumerate() {
+        let col = (i as u32) % cols;
+        let row = (i as u32) / cols;
+        let x = col * thumb_w;
+        let y = row * thumb_h;
+        if y + thumb_h > height {
+            break;
+        }
+
+        if let Ok(poster) = image::load_from_memory(bytes) {
+            let thumb =
+                poster.resize_exact(thumb_w, thumb_h, image::imageops::FilterType::Triangle);
+            image::imageops::overlay(&mut canvas, &thumb.to_rgba8(), x as i64, y as i64);
+        }
+    }
+
+    to_png(&canvas)
+}