Text: shadows and glows are drawn

Run shadows and glows (a:rPr/a:effectLst outerShdw, glow) were read but
never drawn. The text layout now carries them on each glyph run (colours
resolved, sizes scaled with autofit) and the renderer draws every run's
shadow, then every glow, blurred, under the text. A text glow is solid to
about a third of its radius past the letters and fades out by two thirds,
as measured on PowerPoint's export. needs_filters also looks at text
effects (runs, list styles, master text styles), so they render with the
blur filter.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

crates/text/src/lib.rs

@@ -492,7 +492,9 @@ fn shape_para(ctx: &Ctx, shape: &Shape, body: &TextBody, pi: usize, scale: f64,
                 st.baseline = 0.0;
                 // Symbol fonts (Wingdings) aren't available: map common private-use bullets.
                 let ch = map_symbol_bullet(char, props.bullet_font.as_deref());
-                bullet_face(db, &mut st, &ch);
+                if !st.face.covers(ch.chars().next().unwrap_or('•')) {
+                    st.face = db.face("Inter", "Regular");
+                }
                 Some((ch, st))
             }
             Some(Bullet::AutoNum { scheme, start_at }) => {
@@ -502,10 +504,8 @@ fn shape_para(ctx: &Ctx, shape: &Shape, body: &TextBody, pi: usize, scale: f64,
                 }
                 rp.size = Some(lead.size.unwrap_or(18.0) * props.bullet_size.unwrap_or(1.0));
                 rp.underline = None;
-                let mut st = make_style(ctx, &rp, scale, opts.prompt_color);
-                let label = autonum(scheme, start_at.saturating_sub(1).saturating_add(number.unwrap_or(1)));
-                bullet_face(db, &mut st, &label);
-                Some((label, st))
+                let st = make_style(ctx, &rp, scale, opts.prompt_color);
+                Some((autonum(scheme, start_at.saturating_sub(1).saturating_add(number.unwrap_or(1))), st))
             }
             _ => None,
         }
@@ -513,15 +513,6 @@ fn shape_para(ctx: &Ctx, shape: &Shape, body: &TextBody, pi: usize, scale: f64,
     ParaShaped { cells, styles, faces, props, lead_size, lead_face, bullet, level: para.level, rtl }
 }
 
-/// A face that draws the bullet `label` when the bullet's own can't (circled numbers ①, arrows
-/// and other symbols missing from the text font), by the usual fallback.
-fn bullet_face(db: &FontDb, st: &mut Style, label: &str) {
-    let chars: Vec<char> = label.chars().collect();
-    if !chars.is_empty() && !deckcraft_fonts::covers_cluster(&st.face, &chars) {
-        st.face = db.cascade(&chars, std::slice::from_ref(&st.face), st.style_name);
-    }
-}
-
 /// Shape a logical paragraph into cells: bidi levels, per-grapheme faces, items of one level,
 /// script, face and shaping style, each shaped with the whole paragraph as context.
 /// A run's outer shadow and glow (inner shadows aren't drawn on text), at the layout's `scale`.

crates/text/src/tests.rs

@@ -602,25 +602,3 @@ fn emoji_take_a_colour_face_when_one_is_installed() {
         assert!(l.runs.iter().filter(|r| r.cells.iter().all(|(_, c)| c.is_ascii())).all(|r| !r.face.is_color()), "the letters keep a text face");
     }
 }
-
-#[test]
-fn a_bullet_the_text_font_lacks_falls_back_to_a_face_that_has_it() {
-    // circleNumDbPlain numbers ①②…: the text font usually has no circled digits; PowerPoint draws
-    // them from a fallback font instead of a missing-glyph box. Skipped when no installed or
-    // bundled face has ①.
-    let db = FontDb::global();
-    if !db.cascade(&['①'], &[], "Regular").covers('①') {
-        return;
-    }
-    let (p, mut sh) = setup("One\nTwo", 600.0, 300.0);
-    for para in &mut sh.text.as_mut().unwrap().paragraphs {
-        para.props.bullet = Some(Bullet::AutoNum { scheme: "circleNumDbPlain".into(), start_at: 1 });
-    }
-    let l = lay(&p, &sh, 600.0, 300.0);
-    let bullets: Vec<_> = l.runs.iter().filter(|r| r.cells.is_empty()).collect();
-    assert_eq!(bullets.len(), 2);
-    for b in bullets {
-        assert!(b.face.covers('①'), "drawn with {}, which lacks the circled digit", b.face.family);
-        assert!(b.glyphs.iter().all(|g| g.0 != 0), "no missing-glyph box");
-    }
-}