EPS: preserve editable Illustrator art and filter raster page comparison

contributors/people.toml

@@ -120,3 +120,6 @@ sync_github_name = false
 real_name = "Marco Arnulfo"
 display_name = "Marco Arnulfo"
 sync_github_name = false
+
+[people.theromis]
+sync_github_name = true

crates/eps/src/import/ai/mesh.rs

@@ -96,8 +96,24 @@ impl MeshReader {
         let [n0, n1, n2, n3] = corners else { return None };
         // (anchor, towards the next corner, towards the previous one, colour, opacity)
         let read = |n: &Vec<f64>| -> Option<(Point, Vec2, Vec2, Color, f32)> {
-            let comps = n.len().checked_sub(9)?;
-            let &[opacity, x, y, nx, ny, _, px, py, _] = n.get(comps..)? else { return None };
+            // Older editing streams omit opacity; the colour space determines the number
+            // of colour components, so a coordinate must never be mistaken for opacity.
+            let comps = match self.space.as_str() {
+                "DeviceRGB" => 3,
+                "DeviceCMYK" => 4,
+                "DeviceGray" => 1,
+                _ => return None,
+            };
+            let (opacity, geometry) = match n.get(comps..)? {
+                geometry if geometry.len() == 8 => (1.0, geometry),
+                [opacity, geometry @ ..] if geometry.len() == 8 => (*opacity, geometry),
+                _ => return None,
+            };
+            let &[x, y, nx, ny, nw, px, py, pw] = geometry else { return None };
+            // Non-unit rational weights need a different surface representation.
+            if nw != 1.0 || pw != 1.0 {
+                return None;
+            }
             if ![opacity, x, y, nx, ny, px, py].iter().all(|v| v.is_finite()) {
                 return None;
             }

crates/eps/src/import/ai/obj.rs

@@ -66,6 +66,8 @@ pub(super) struct Obj {
     pub entries: Vec<(Option<String>, Vec<V>)>,
     /// Values closed without a key.
     pub content: Vec<V>,
+    /// Vector art enclosed by `X=` … `X+` in an opacity-mask dictionary.
+    pub art: Option<std::sync::Arc<vectorcraft_doc::Node>>,
 }
 
 impl Obj {

crates/eps/src/import/ai/read.rs

@@ -272,6 +272,7 @@ enum Kind {
     Group,
     Compound,
     Clip,
+    Mask,
     Obj(Box<Obj>),
 }
 
@@ -290,6 +291,8 @@ struct Frame {
     base: usize,
     /// The clipping paths' indexes among the children.
     clips: Vec<usize>,
+    /// A compound member group explicitly declares its subpaths' winding with `D`.
+    compound_members: bool,
 }
 
 /// What a reader of a pattern's definition has of its head, `(name) llx lly urx ury`: the operands
@@ -383,6 +386,8 @@ struct Reader<'a> {
     clip_fills: HashSet<NodeId>,
     /// Groups closed as an object's drawn look (`9 () XW`).
     looks: HashSet<NodeId>,
+    /// Legacy compound member groups, even when followed by the generic `9 () XW` marker.
+    compound_groups: HashSet<NodeId>,
     /// The gradient mesh being read (`/Mesh X!` … `/End X!`), and whether it started on a `%_` line.
     mesh: Option<(super::mesh::MeshReader, bool)>,
     /// The art styles (`%AI9_BeginArtStyles`), by name.
@@ -425,9 +430,6 @@ const IGNORED: &[&str] = &[
     "Xh",
     "XH",
     "XF",
-    "D",
-    "X=",
-    "X+",
     "Bc",
     "XP",
     "Np",
@@ -529,6 +531,7 @@ impl<'a> Reader<'a> {
             hidden_ids: HashSet::new(),
             clip_fills: HashSet::new(),
             looks: HashSet::new(),
+            compound_groups: HashSet::new(),
             group_ended: false,
             layer_state: None,
             styles: HashMap::new(),
@@ -785,7 +788,16 @@ impl<'a> Reader<'a> {
             self.ensure_space();
         }
         let base = if matches!(kind, Kind::Obj(_)) { self.stack.len() } else { self.frames.last().map_or(0, |f| f.base) };
-        self.frames.push(Frame { kind, children: Vec::new(), hidden, after: self.after_object, gs: self.gs.clone(), base, clips: Vec::new() });
+        self.frames.push(Frame {
+            kind,
+            children: Vec::new(),
+            hidden,
+            after: self.after_object,
+            gs: self.gs.clone(),
+            base,
+            clips: Vec::new(),
+            compound_members: false,
+        });
         self.after_object = false;
         Ok(())
     }
@@ -836,7 +848,7 @@ impl<'a> Reader<'a> {
             "*U" => self.close(what, |k| matches!(k, Kind::Compound))?,
             _ => self.close(what, |k| matches!(k, Kind::Clip))?,
         };
-        let Frame { kind, children: kids, gs, clips, hidden: opened_hidden, .. } = f;
+        let Frame { kind, children: kids, gs, clips, hidden: opened_hidden, compound_members, .. } = f;
         // A group holding only clipping paths (`q … u <path> W n U … Q`) doesn't clip on its own: `u`/`U` don't save
         // the graphics state as `q`/`Q` do, so its paths clip the clipping group around it, as the file's PDF part draws it.
         if matches!(kind, Kind::Group)
@@ -879,6 +891,9 @@ impl<'a> Reader<'a> {
         if clipping && let Some(f) = self.frames.last_mut() {
             f.clips.push(f.children.len());
         }
+        if compound_members {
+            self.compound_groups.insert(node.id);
+        }
         self.add(node, opened_hidden || hidden)?;
         if let Some(p) = painted {
             self.clip_fills.insert(p.id);
@@ -994,6 +1009,16 @@ impl<'a> Reader<'a> {
                 return Ok(());
             }
             ";" => return self.end_obj(),
+            "X=" => {
+                if !matches!(self.frames.last(), Some(Frame { kind: Kind::Obj(o), .. }) if o.ty == "Mask") {
+                    // `X=` also introduces legacy text frame art, read by `text_frames`.
+                    return Ok(());
+                }
+                self.end_path_quietly();
+                return self.open(Kind::Mask, hidden);
+            }
+            "X+" if self.frames.iter().any(|f| matches!(f.kind, Kind::Mask)) => return self.end_mask(),
+            "X+" => return Ok(()),
             _ => {}
         }
         // What follows an object (its name, transparency and style) ends with anything else. The
@@ -1105,6 +1130,19 @@ impl<'a> Reader<'a> {
                 }
             }
             "d" => self.dash(&vals),
+            "D" => {
+                // The published format §6.8 permits `u` groups of compound members:
+                // https://www.moon-soft.com/program/FORMAT/graphics/ai30.pdf
+                // Their explicit winding declarations describe subpaths, not separate paints;
+                // modern streams can also end these groups with `9 () XW`.
+                let n = self.frames.len();
+                if n >= 2
+                    && self.frames.get(n - 2).is_some_and(|f| matches!(f.kind, Kind::Compound))
+                    && let Some(f) = self.frames.last_mut().filter(|f| matches!(f.kind, Kind::Group))
+                {
+                    f.compound_members = true;
+                }
+            }
             // Transparency and state.
             "Xy" => self.transparency(&vals),
             // A group's own state (`Xd`, `6 () XW`) without an `Xy` keeps the current transparency, as
@@ -1224,6 +1262,23 @@ impl<'a> Reader<'a> {
         Ok(())
     }
 
+    /// Capture mask art in document coordinates, without adding it to the owner's siblings.
+    fn end_mask(&mut self) -> Result<(), String> {
+        self.end_path_quietly();
+        let f = self.close("X+", |k| matches!(k, Kind::Mask))?;
+        let (children, clip) = self.clip_first(f.children, &f.clips);
+        let art = self.new_node(NodeKind::Group { children, clip }, &f.gs);
+        self.gs = f.gs;
+        self.after_object = f.after;
+        let Some(Frame { kind: Kind::Obj(o), .. }) = self.frames.last_mut() else {
+            return Err("mask art ends outside a mask dictionary".into());
+        };
+        if o.art.replace(Arc::new(art)).is_some() {
+            return Err("a mask has more than one art block".into());
+        }
+        Ok(())
+    }
+
     /// `;`: the innermost dictionary closes.
     fn end_obj(&mut self) -> Result<(), String> {
         if !matches!(self.frames.last(), Some(Frame { kind: Kind::Obj(_), .. })) {
@@ -1379,13 +1434,19 @@ impl<'a> Reader<'a> {
     /// An object's dictionary: its name (`AIArtName`, or the XML id `AI10_ArtUID`), and the
     /// opacity mask it may carry.
     fn art_dictionary(&mut self, o: &Obj) {
-        // A mask (`/Mask`, keyed `AI9_Mask`): its art is on `X=` … `X+` lines, and drawing the
-        // object without it shows what the mask hides, so it must be named (#2004). A mask that
-        // is disabled changes nothing.
-        if let Some(mask) = o.obj("AI9_Mask").or_else(|| o.obj("Mask"))
-            && mask.nums("Disabled").first().copied() != Some(1.0)
-        {
-            self.unreadable("opacity masks");
+        if let Some(mask) = o.obj("AI9_Mask").or_else(|| o.obj("Mask")) {
+            if let Some(art) = &mask.art {
+                let on = |key: &str| mask.nums(key).first().copied() == Some(1.0);
+                let value =
+                    OpacityMask { art: art.clone(), clip: on("Clipping"), invert: on("Inverted"), disabled: on("Disabled"), linked: on("Linked") };
+                if let Some(n) = self.last_object().filter(|n| !matches!(n.kind, NodeKind::Layer { .. })) {
+                    n.extras_mut().mask = Some(Box::new(value));
+                } else if !on("Disabled") {
+                    self.unreadable("opacity masks without an owning object");
+                }
+            } else if mask.nums("Disabled").first().copied() != Some(1.0) {
+                self.unreadable("opacity masks without readable art");
+            }
         }
         let name = match o.text("AIArtName") {
             Some(name) => name,
@@ -1542,7 +1603,11 @@ impl<'a> Reader<'a> {
         let style = vals.iter().rev().find_map(V::text).unwrap_or_default();
         let after = std::mem::take(&mut self.after_object);
         if code == 9.0
-            && let Some(look) = self.frames.last().and_then(|f| f.children.last()).filter(|n| matches!(n.kind, NodeKind::Group { .. }))
+            && let Some(look) = self
+                .frames
+                .last()
+                .and_then(|f| f.children.last())
+                .filter(|n| matches!(n.kind, NodeKind::Group { .. }) && !self.compound_groups.contains(&n.id))
         {
             self.looks.insert(look.id);
         }

crates/eps/src/import/ai/tests.rs

@@ -809,8 +809,7 @@ fn what_it_doesnt_read_is_an_error_where_it_shows() {
     assert!(e.contains("pattern fills"), "{e}");
     let e = read(stream(&layer("/SymbolInstance :\n(Dot) /SymbolRef ,\n;\n")).as_bytes()).unwrap_err();
     assert!(e.contains("symbols"), "{e}");
-    // An opacity mask (#2004): drawing the layer's art whole would show what the mask hides, so
-    // the mask is named and the file is read from its PDF part instead.
+    // A mask with no owner must still be reported (#2004).
     let mask = "%_/ArtDictionary :\n%_/XMLUID : (M) ; (AI10_ArtUID) ,\n%_/Mask :\n%_1 /Bool (Linked) ,\n%_0 /Bool (Disabled) ,\n%_X=\n\
                 %_0 0 0 1 k\n%_0 0 m\n%_5 0 L\n%_5 5 L\n%_0 5 L\n%_0 0 L\n%_f\n%_X+\n%_ (Art) ,\n%_1 /Bool (Clipping) ,\n%_0 /Bool (Inverted) ,\n%_; (AI9_Mask) ,\n%_;\n";
     let e = read(stream(&layer(mask)).as_bytes()).unwrap_err();
@@ -1219,3 +1218,75 @@ fn a_gradient_mesh_reads_as_a_patch() {
     let e = read(stream(&layer(&mesh("Separation"))).as_bytes()).unwrap_err();
     assert!(e.contains("gradient meshes"), "{e}");
 }
+
+/// Both mesh-corner layouts must keep colour, position and handles, rather than guessing
+/// opacity from a coordinate. Unsupported weights and truncated corners remain errors.
+#[test]
+fn mesh_corners_with_and_without_opacity() {
+    let geometry = ["10 20 10 25 1 15 20 1", "10 50 15 50 1 10 45 1", "40 50 40 45 1 35 50 1", "40 20 35 20 1 40 25 1"];
+    for (space, colour) in [("DeviceRGB", "0.2 0.4 0.6"), ("DeviceCMYK", "0.1 0.2 0.3 0.4"), ("DeviceGray", "0.5")] {
+        let mesh = |opacity: &str| {
+            let corners: String = geometry.iter().map(|g| format!("%_[{colour} {opacity}{g}] /N X#\n")).collect();
+            format!("/Mesh X!\n%_/{space} /CS X#\n{corners}%_/E X#\n/End X!\n")
+        };
+        let old = art(&read_ok(&layer(&mesh(""))).doc);
+        let new = art(&read_ok(&layer(&mesh("1 "))).doc);
+        assert_eq!(old[0].kind, new[0].kind);
+        let translucent = art(&read_ok(&layer(&mesh("0.25 "))).doc);
+        let NodeKind::Mesh(m) = &translucent[0].kind else { panic!("mesh") };
+        assert!(m.points.iter().all(|p| p.opacity == 0.25));
+        assert_eq!(m.points[0].p, Point::new(10.0, 80.0));
+        for broken in [mesh("").replace("10 25 1", "10 25 0.5"), mesh("").replace("15 20 1]", "15 20]")] {
+            assert!(read(stream(&layer(&broken)).as_bytes()).unwrap_err().contains("gradient meshes"));
+        }
+    }
+}
+
+#[test]
+fn vector_opacity_mask_keeps_its_art_and_does_not_paint_as_a_sibling() {
+    let owner = format!("{RED}{}f\n", rect_path(10.0, 20.0, 50.0, 60.0));
+    let mask = "%_/ArtDictionary :\n%_/Mask :\n%_1 /Bool (Linked) ,\n%_X=\n%_u\n%_1 g\n%_10 20 m\n%_10 60 L\n%_30 60 L\n%_30 20 L\n%_f\n%_U\n%_X+\n%_(Art) ,\n%_1 /Bool (Clipping) ,\n%_0 /Bool (Inverted) ,\n%_0 /Bool (Disabled) ,\n%_; (AI9_Mask) ,\n%_;\n";
+    let following = format!("{}f\n", rect_path(70.0, 20.0, 80.0, 30.0));
+    for (invert, disabled, linked) in [(false, false, true), (true, false, false), (false, true, true)] {
+        let mask = mask
+            .replace("0 /Bool (Inverted)", &format!("{} /Bool (Inverted)", u8::from(invert)))
+            .replace("0 /Bool (Disabled)", &format!("{} /Bool (Disabled)", u8::from(disabled)))
+            .replace("1 /Bool (Linked)", &format!("{} /Bool (Linked)", u8::from(linked)));
+        let r = read_ok(&layer(&format!("{owner}{mask}{following}")));
+        assert!(r.warnings.is_empty());
+        let a = art(&r.doc);
+        assert_eq!(a.len(), 2);
+        assert_eq!(fill(&a[1]).color(), Some(Color::rgb(1.0, 0.0, 0.0)), "mask colour must not leak");
+        let m = a[0].extras().mask.as_ref().unwrap();
+        assert_eq!((m.clip, m.invert, m.disabled, m.linked), (true, invert, disabled, linked));
+        let mask_path = &m.art.children().unwrap()[0].children().unwrap()[0];
+        assert!(matches!(mask_path.kind, NodeKind::Path { .. }));
+        assert_eq!(mask_path.geometric_bounds(), Some(Rect::new(10.0, 40.0, 30.0, 80.0)));
+        assert_ne!(mask_path.id, a[0].id);
+    }
+    for broken in [mask.replace("%_X+\n", ""), mask.replace("%_U\n", ""), mask.replace("%_f", "%_unknownMaskOperator")] {
+        assert!(read(stream(&layer(&format!("{owner}{broken}"))).as_bytes()).is_err());
+    }
+}
+
+/// `9 () XW` also follows legacy compound member groups. The final gradient paints
+/// every member; the initial black paint is a placeholder, not a separate black object.
+#[test]
+fn winding_declared_compound_members_keep_the_final_gradient() {
+    let defs = "%AI5_BeginGradient: (G)\n(G) 0 2 Bd\n0 0 0 0 1 0 0 2 50 0 Bs\n0 0 0 0 0 0 1 2 50 100 Bs\nBD\n%AI5_EndGradient\n";
+    let body = format!(
+        "*u\nu\n1 D\n0 g\n{}f\n0 D\n{}Bb\n1 (G) 0 0 0 100 1 0 0 1 0 0 Bg\nf\n0 BB\nU\n9 () XW\n*U\n",
+        rect_path(10.0, 10.0, 80.0, 80.0),
+        rect_path(30.0, 30.0, 50.0, 50.0)
+    );
+    let r = read_ok(&format!("{defs}{}", layer(&body)));
+    let a = art(&r.doc);
+    assert_eq!(a.len(), 1);
+    let NodeKind::Compound { children, .. } = &a[0].kind else { panic!("compound, not separately painted look") };
+    assert_eq!(children.len(), 2);
+    assert!(matches!(fill(&a[0]), Paint::Gradient(g) if g.gradient.stops.len() == 2));
+    assert!(children.iter().all(|n| matches!(n.kind, NodeKind::Path { .. })));
+    // Without winding declarations this is still an independently painted appearance group.
+    let r = read_ok(&format!("{defs}{}", layer(&body.replace("1 D\n", "").replace("0 D\n", ""))));
+    assert!(matches!(art(&r.doc)[0].kind, NodeKind::Group { .. }));
+}

crates/eps/src/import/native.rs

@@ -703,6 +703,44 @@ fn compare_scale(r: Rect) -> f64 {
     (400.0 / r.width().max(r.height()).max(1.0)).min(4.0)
 }
 
+/// A flattened print page made only of images. Sampling it directly at 400 pixels aliases
+/// its fine edges while vector art receives coverage antialiasing. Compare both at a higher
+/// resolution and apply the same reconstruction filter; keep the existing difference limits.
+fn comparison_samples(doc: &Document) -> u32 {
+    let (mut images, mut vector) = (false, false);
+    doc.walk(|n| match n.kind {
+        NodeKind::Image(_) => images = true,
+        NodeKind::Layer { .. } | NodeKind::Group { .. } | NodeKind::Path { clipping: true, .. } => {}
+        _ => vector = true,
+    });
+    if images && !vector { 4 } else { 1 }
+}
+
+/// Render for the page check. The comparison scale bounds the long side to 400 px, so the
+/// extra samples stay bounded to 1600 px. Filter premultiplied channels, including alpha.
+fn comparison_render(
+    renderer: &mut vectorcraft_render::Renderer,
+    doc: &Document,
+    rect: Rect,
+    scale: f64,
+    samples: u32,
+) -> vectorcraft_render::Rendered {
+    let rendered = renderer.render_region(doc, rect, scale * f64::from(samples), false);
+    if samples == 1 {
+        return rendered;
+    }
+    let (width, height) = match vectorcraft_render::raster_size(rect, scale) {
+        Ok(size) => size,
+        // A malformed region cannot provide a comparable raster.
+        Err(_) => return rendered,
+    };
+    let Some(src) = image::RgbaImage::from_raw(rendered.width, rendered.height, rendered.pixels) else {
+        return vectorcraft_render::Rendered { width: 0, height: 0, pixels: Vec::new() };
+    };
+    let pixels = image::imageops::resize(&src, width, height, image::imageops::FilterType::Triangle).into_raw();
+    vectorcraft_render::Rendered { width, height, pixels }
+}
+
 /// The page drawn once, to weigh the layers' art against it: [`Self::difference`] draws the layers
 /// with a renderer of their own, which keeps their decoded images between draws (the page's images
 /// can share their keys and not their pixels, so the two don't share one).
@@ -712,6 +750,7 @@ struct PageView {
     page_type: Vec<Rect>,
     layers: vectorcraft_render::Renderer,
     scale: f64,
+    samples: u32,
 }
 
 impl PageView {
@@ -720,10 +759,11 @@ impl PageView {
         let scale = compare_scale(ra);
         // Drawn on nothing and then seen on white: blending modes have no page to blend with, as in
         // the app that wrote the file.
-        let page = vectorcraft_render::Renderer::new().render_region(frame.page, ra, scale, false);
+        let samples = comparison_samples(frame.page);
+        let page = comparison_render(&mut vectorcraft_render::Renderer::new(), frame.page, ra, scale, samples);
         let mut page_type = vec![];
         type_areas(&frame.page.layers, ra, scale, &mut page_type);
-        Self { page, page_type, layers: vectorcraft_render::Renderer::new(), scale }
+        Self { page, page_type, layers: vectorcraft_render::Renderer::new(), scale, samples }
     }
 
     /// How `b` on `rb` (a rectangle the page's size) draws differently from the page ([`compared`]).
@@ -731,7 +771,7 @@ impl PageView {
         // The page doesn't print what isn't printed.
         let printed = as_printed(b);
         let b = printed.as_ref().unwrap_or(b);
-        let y = self.layers.render_region(b, rb, self.scale, false);
+        let y = comparison_render(&mut self.layers, b, rb, self.scale, self.samples);
         let mut areas = self.page_type.clone();
         type_areas(&b.layers, rb, self.scale, &mut areas);
         compared(&self.page, &y, &areas)
@@ -743,7 +783,7 @@ impl PageView {
     fn colour_difference(&mut self, b: &Document, rb: Rect) -> f64 {
         let printed = as_printed(b);
         let b = printed.as_ref().unwrap_or(b);
-        let y = self.layers.render_region(b, rb, self.scale, false);
+        let y = comparison_render(&mut self.layers, b, rb, self.scale, self.samples);
         if (y.width, y.height) != (self.page.width, self.page.height) {
             return 1.0;
         }
@@ -759,8 +799,9 @@ fn difference(a: &Document, ra: Rect, b: &Document, rb: Rect) -> Difference {
     let b = printed.as_ref().unwrap_or(b);
     let scale = compare_scale(ra);
     // A renderer each: the two documents' images can share their keys and not their pixels.
-    let x = vectorcraft_render::Renderer::new().render_region(a, ra, scale, false);
-    let y = vectorcraft_render::Renderer::new().render_region(b, rb, scale, false);
+    let samples = comparison_samples(a);
+    let x = comparison_render(&mut vectorcraft_render::Renderer::new(), a, ra, scale, samples);
+    let y = comparison_render(&mut vectorcraft_render::Renderer::new(), b, rb, scale, samples);
     let mut areas = vec![];
     type_areas(&a.layers, ra, scale, &mut areas);
     type_areas(&b.layers, rb, scale, &mut areas);
@@ -772,7 +813,7 @@ fn difference(a: &Document, ra: Rect, b: &Document, rb: Rect) -> Difference {
 /// at all ([`differ`]): the page of an RGB document is written in the colours' CMYK equivalents,
 /// and what the comparison looks for is art that is missing or out of place.
 fn compared(x: &vectorcraft_render::Rendered, y: &vectorcraft_render::Rendered, areas: &[Rect]) -> Difference {
-    if x.width != y.width || x.height != y.height {
+    if x.width == 0 || x.height == 0 || x.width != y.width || x.height != y.height {
         return Difference { any: 1.0, solid: 1.0 };
     }
     let differs: Vec<bool> = x.pixels.as_chunks::<4>().0.iter().zip(y.pixels.as_chunks::<4>().0).map(|(p, q)| differ(p, q)).collect();
@@ -1358,4 +1399,58 @@ mod tests {
         let texts: Vec<String> = parts.iter().filter_map(|n| if let NodeKind::Text(t) = &n.kind { Some(t.plain_text()) } else { None }).collect();
         assert_eq!(texts, ["Hello", "abcd"]);
     }
+    /// A flattened page samples a fine stripe pattern once per comparison pixel; that
+    /// aliases to white although vector coverage is gray. Shared minification avoids the
+    /// false fallback, while genuinely missing art must still be rejected.
+    #[test]
+    fn raster_page_comparison_filters_minification_without_accepting_missing_art() {
+        use vectorcraft_color::{Color, Paint};
+        use vectorcraft_doc::{Appearance, ImageBlob, ImageObject};
+        let mut vector = Document::new(1000.0, 500.0);
+        let layer = vector.layers[0].id;
+        for i in 0..400 {
+            let x = f64::from(i) * 2.5 + 0.5;
+            let n = Node::path(
+                vector.alloc_id(),
+                vectorcraft_geom::shapes::rectangle(Rect::new(x, 0.0, x + 1.0, 500.0)),
+                Appearance::basic(Paint::solid(Color::BLACK), Paint::None, 0.0),
+            );
+            vector.insert(Some(layer), usize::MAX, n).unwrap();
+        }
+        let rect = vector.artboards[0].rect;
+        let source = vectorcraft_render::Renderer::new().render_region(&vector, rect, 1.6, true);
+        let mut png = Vec::new();
+        image::RgbaImage::from_raw(source.width, source.height, source.to_straight())
+            .unwrap()
+            .write_to(&mut std::io::Cursor::new(&mut png), image::ImageFormat::Png)
+            .unwrap();
+        let blob = ImageBlob::new("image/png", png);
+        let key = blob.content_key();
+        let mut page = Document::new(1000.0, 500.0);
+        page.images.insert(key.clone(), blob);
+        let image = Node::new(
+            page.alloc_id(),
+            NodeKind::Image(Box::new(ImageObject {
+                key,
+                width: source.width,
+                height: source.height,
+                xf: Affine::scale(1.0 / 1.6),
+                link: None,
+                placement: Default::default(),
+            })),
+        );
+        page.insert(Some(page.layers[0].id), usize::MAX, image).unwrap();
+        assert_eq!(comparison_samples(&page), 4);
+        assert_eq!(comparison_samples(&vector), 1, "ordinary vector pages retain their comparison");
+        let mut renderer = vectorcraft_render::Renderer::new();
+        let a = comparison_render(&mut renderer, &page, rect, 0.4, 1);
+        let b = comparison_render(&mut vectorcraft_render::Renderer::new(), &vector, rect, 0.4, 1);
+        assert!(compared(&a, &b, &[]).solid > MAX_SOLID_DIFFERENCE, "the old point sampling falsely refused this page");
+        let frame = Frame { page: &page, page_rect: rect, rect, whole: false };
+        let mut view = PageView::new(&frame);
+        assert!(compare(&frame, &mut view, &vector).is_ok());
+        assert!(compare(&frame, &mut view, &Document::new(1000.0, 500.0)).is_err(), "missing artwork remains an error");
+        let shifted = Rect::new(0.0, 0.0, 500.0, 500.0);
+        assert!(view.difference(&vector, shifted).any > MAX_DIFFERENCE, "wrong framing remains an error");
+    }
 }

crates/eps/src/import/tests_native.rs

@@ -994,3 +994,51 @@ fn a_copied_area_type_object_is_framed_where_its_own_art_path_is() {
     let b = frame.bounds().unwrap();
     assert!((b.x0 - 30.0).abs() < 1e-6 && (b.y0 - 30.0).abs() < 1e-6 && (b.x1 - 80.0).abs() < 1e-6 && (b.y1 - 50.0).abs() < 1e-6, "{b:?}");
 }
+
+/// A raster print page can carry a fully vector editing copy. The legacy mesh has no
+/// opacity operand and its vector mask hides half of it: ignoring either loses this import.
+#[test]
+fn raster_print_page_recovers_legacy_mesh_vector_mask_and_editable_curve() {
+    let mesh = "/Mesh X!\n%_/DeviceRGB /CS X#\n\
+        %_[0 0 1 20 20 20 30 1 30 20 1] /N X#\n\
+        %_[0 0 1 20 60 30 60 1 20 50 1] /N X#\n\
+        %_[0 0 1 60 60 60 50 1 50 60 1] /N X#\n\
+        %_[0 0 1 60 20 50 20 1 60 30 1] /N X#\n%_/E X#\n/End X!\n";
+    let mask = "%_/ArtDictionary :\n%_/Mask :\n%_X=\n%_1 g\n%_20 20 m\n%_20 60 L\n%_40 60 L\n%_40 20 L\n%_f\n%_X+\n%_(Art) ,\n%_1 /Bool (Clipping) ,\n%_1 /Bool (Linked) ,\n%_; (AI9_Mask) ,\n%_;\n";
+    let curve = "0 1 1 0 1 0 0 Xa\n70 20 m\n70 50 90 50 90 20 c\nf\n";
+    let data = native(&layer("Editable", true, &format!("u\n{mesh}{mask}{curve}U\n")));
+    let samples = ("0000ff".repeat(20) + &"ffffff".repeat(20)).repeat(40);
+    let page = format!(
+        "gsave 20 20 translate 40 40 scale /DeviceRGB setcolorspace \
+        << /ImageType 1 /Width 40 /Height 40 /BitsPerComponent 8 /Decode [0 1 0 1 0 1] \
+        /ImageMatrix [40 0 0 -40 0 40] /DataSource <{samples}> >> image grestore \
+        1 0 0 setrgbcolor 70 20 moveto 70 50 90 50 90 20 curveto closepath fill"
+    );
+    // Use AI9's zlib container, too, rather than only the newer Zstandard test helper.
+    use std::io::Write as _;
+    let mut encoder = flate2::write::ZlibEncoder::new(Vec::new(), flate2::Compression::default());
+    encoder.write_all(data.as_bytes()).unwrap();
+    let packed = ascii85(&encoder.finish().unwrap());
+    let file = format!(
+        "%!PS-Adobe-3.0 EPSF-3.0\n%%BoundingBox: 0 0 100 100\n%%EndComments\n{page}\nshowpage\n%%EOF\n%AI9_PrivateDataBegin\n%AI9_DataStream\n%{packed}\n%AI9_PrivateDataEnd\n"
+    );
+    let r = import(file.as_bytes()).unwrap();
+    assert!(r.warnings.is_empty(), "{:?}", r.warnings);
+    assert_eq!(names(&r.document), ["Editable"]);
+    let group = &r.document.layers[0].children().unwrap()[0];
+    let a = group.children().unwrap();
+    assert_eq!(a.len(), 2);
+    assert!(matches!(a[0].kind, NodeKind::Mesh(_)));
+    assert!(a[0].extras().mask.is_some());
+    let NodeKind::Path { path, .. } = &a[1].kind else { panic!("editable path") };
+    assert_eq!(path.anchor_count(), 2);
+    assert_ne!(path.subpaths[0].anchors[0].h_out, path.subpaths[0].anchors[0].p);
+    assert_ne!(a[0].id, a[1].id);
+    // The normal EPS path remains available explicitly.
+    let page = crate::import_with(file.as_bytes(), false).unwrap();
+    assert!(matches!(page.document.layers[0].children().unwrap()[0].kind, NodeKind::Image(_)));
+    // A wrong editing copy must still fail the page comparison.
+    let wrong = file.replace("%%BoundingBox: 0 0 100 100", "%%BoundingBox: 0 0 120 100");
+    let r = import(wrong.as_bytes()).unwrap();
+    assert!(r.warnings.iter().any(|w| w.contains("different page")), "{:?}", r.warnings);
+}