Merge branch 'main' into fix/sec-model-table-cells

Cargo.lock

@@ -1038,7 +1038,7 @@ checksum = "0c87e182de0887fd5361989c677c4e8f5000cd9491d6d563161a8f3a5519fc7f"
 
 [[package]]
 name = "deckcraft"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "arboard",
  "chrono",
@@ -1060,7 +1060,7 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-anim"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "deckcraft-geom",
  "deckcraft-model",
@@ -1069,7 +1069,7 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-av1"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "deckcraft-bitstream",
  "rayon",
@@ -1078,14 +1078,14 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-bitstream"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "craft-media",
 ]
 
 [[package]]
 name = "deckcraft-cli"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "deckcraft-engine",
  "deckcraft-mcp",
@@ -1095,14 +1095,14 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-color"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "serde",
 ]
 
 [[package]]
 name = "deckcraft-engine"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "chrono",
  "deckcraft-anim",
@@ -1128,7 +1128,7 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-fonts"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "epaint_default_fonts",
  "harfrust 0.13.3",
@@ -1140,7 +1140,7 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-format"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "deckcraft-model",
  "serde",
@@ -1151,7 +1151,7 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-geom"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "kurbo",
  "serde",
@@ -1159,7 +1159,7 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-h264"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "deckcraft-bitstream",
  "rayon",
@@ -1168,7 +1168,7 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-hevc"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "deckcraft-bitstream",
  "rayon",
@@ -1177,7 +1177,7 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-mcp"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "deckcraft-engine",
  "deckcraft-render",
@@ -1187,7 +1187,7 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-media"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "craft-audio",
  "craft-media",
@@ -1203,7 +1203,7 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-metafile"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "image",
  "kurbo",
@@ -1212,7 +1212,7 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-model"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "deckcraft-color",
  "deckcraft-geom",
@@ -1224,7 +1224,7 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-pdf"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "craft-pdf",
  "deckcraft-fonts",
@@ -1242,7 +1242,7 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-pptx"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "deckcraft-color",
  "deckcraft-engine",
@@ -1258,7 +1258,7 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-render"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "deckcraft-anim",
  "deckcraft-color",
@@ -1277,7 +1277,7 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-text"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "chrono",
  "deckcraft-color",
@@ -1291,7 +1291,7 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-ui-egui"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "craft-ui",
  "craft-update",
@@ -1317,7 +1317,7 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-vp9"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "deckcraft-bitstream",
  "rayon",
@@ -1326,7 +1326,7 @@ dependencies = [
 
 [[package]]
 name = "deckcraft-web"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "craft-web-api",
  "craft-web-host",
@@ -6311,7 +6311,7 @@ checksum = "9440ea3e5aeabb0ac63af70daf835274065238cdd0cec83418f417eae38bacee"
 
 [[package]]
 name = "xtask"
-version = "0.18.1"
+version = "0.18.0"
 dependencies = [
  "serde_json",
 ]

Cargo.toml

@@ -4,7 +4,7 @@ members = ["crates/*", "apps/*", "xtask"]
 default-members = ["crates/*", "apps/deckcraft", "apps/deckcraft-cli"]
 
 [workspace.package]
-version = "0.18.1"
+version = "0.18.0"
 edition = "2024"
 license = "MIT OR Apache-2.0"
 rust-version = "1.95"

apps/deckcraft-cli/src/main.rs

@@ -148,6 +148,9 @@ fn warn_if_damaged(path: &str, opened: &serde_json::Value) {
     if slides > 0 {
         eprintln!("deckcraft-cli: warning: {path}: {slides} slide{} couldn't be read and left out", if slides == 1 { "" } else { "s" });
     }
+    for w in opened.get("importWarnings").and_then(|v| v.as_array()).into_iter().flatten().filter_map(|w| w.as_str()) {
+        eprintln!("deckcraft-cli: warning: {path}: {w}");
+    }
     if media > 0 {
         eprintln!("deckcraft-cli: warning: {path}: {media} picture or media file{} couldn't be read", if media == 1 { "" } else { "s" });
     }

crates/av1/src/decoder.rs

@@ -118,8 +118,6 @@ enum Output {
         grain: FilmGrainParams,
         apply_film_grain: bool,
         pts: i64,
-        /// What copying the picture out costs, in the reference's own format.
-        bytes: u64,
     },
 }
 
@@ -134,7 +132,7 @@ impl Output {
     fn take(self) -> Result<Picture> {
         match self {
             Output::Decoded(s) => s.wait().map(|p| Arc::try_unwrap(p).unwrap_or_else(|p| (*p).clone())),
-            Output::Existing { slot, seq, width, height, grain, apply_film_grain, pts, .. } => {
+            Output::Existing { slot, seq, width, height, grain, apply_film_grain, pts } => {
                 let rf = slot.wait()?;
                 Ok(output_picture(&seq, &rf, width, height, &grain, apply_film_grain, pts))
             }
@@ -381,8 +379,8 @@ impl Decoder {
         // Output policy (7.18.1 note): with scalability, show one frame per temporal unit, the
         // highest spatial layer present.
         let scalable = self.seq.as_ref().is_some_and(|s| s.op_idc != 0);
-        let kept: Vec<Output> = if !scalable {
-            out.into_iter().map(|(o, _, _)| o).collect()
+        if !scalable {
+            self.out.extend(out.into_iter().map(|(o, _, _)| o));
         } else {
             let mut last: Option<(usize, u32)> = None;
             let mut sel: Vec<Output> = Vec::new();
@@ -402,27 +400,8 @@ impl Decoder {
                     }
                 }
             }
-            sel
-        };
-        // Every repeat is copied out whole, so the repeats this call keeps (after the layer
-        // selection) must not queue more than half the decoder budget; the first one over it and
-        // everything after is dropped.
-        let mut r = r;
-        let mut repeat_bytes = 0u64;
-        let mut ok = Vec::with_capacity(kept.len());
-        for o in kept {
-            if let Output::Existing { bytes, .. } = &o {
-                repeat_bytes = repeat_bytes.saturating_add(*bytes);
-                if repeat_bytes > self.memory_budget / 2 {
-                    if r.is_ok() {
-                        r = Err(Error::Invalid("repeated frame outputs exceed the decoder memory budget"));
-                    }
-                    break;
-                }
-            }
-            ok.push(o);
+            self.out.extend(sel);
         }
-        self.out.extend(ok);
         r
     }
 
@@ -524,15 +503,6 @@ impl Decoder {
             let idx = fh.frame_to_show_map_idx;
             let slot = self.ref_frames[idx].clone().ok_or(Error::Invalid("show_existing_frame of an empty slot"))?;
             let info = self.refs[idx].clone();
-            // Sized in the reference's own format: a new sequence header may differ from it.
-            let shape = deckcraft_bitstream::budget::PictureShape {
-                width: u64::from(info.upscaled_width),
-                height: u64::from(info.frame_height),
-                shift_x: u32::from(info.subsampling_x),
-                shift_y: u32::from(info.subsampling_y),
-                chroma_planes: if info.mono_chrome { 0 } else { 2 },
-                bytes_per_sample: 2,
-            };
             let o = Output::Existing {
                 slot: slot.clone(),
                 seq: seq.clone(),
@@ -541,7 +511,6 @@ impl Decoder {
                 grain: fh.film_grain.clone(),
                 apply_film_grain: self.apply_film_grain,
                 pts: self.pts,
-                bytes: shape.bytes().unwrap_or(u64::MAX),
             };
             if fh.frame_type == KEY_FRAME as u8 {
                 // reference frame loading process (7.21) then refresh every slot (7.20)
@@ -660,9 +629,6 @@ impl Decoder {
                 ri.lf_deltas = fh.lf.deltas;
                 ri.seg_features = fh.seg.features;
                 ri.grain = fh.film_grain.clone();
-                ri.subsampling_x = job.seq.color.subsampling_x;
-                ri.subsampling_y = job.seq.color.subsampling_y;
-                ri.mono_chrome = job.seq.color.mono_chrome;
                 self.ref_frames[i] = Some(job.slot.clone());
             }
         }

crates/av1/src/header.rs

@@ -360,10 +360,6 @@ pub struct RefInfo {
     pub lf_deltas: LoopFilterDeltas,
     pub seg_features: SegmentationFeatures,
     pub grain: FilmGrainParams,
-    /// The colour format the frame was decoded in (a later sequence header may change it).
-    pub subsampling_x: u8,
-    pub subsampling_y: u8,
-    pub mono_chrome: bool,
 }
 
 /// A parsed uncompressed frame header with its derived variables.

crates/engine/src/cmd.rs

@@ -433,6 +433,15 @@ pub(crate) fn shape_of(s: &Session, id: ShapeId) -> Result<deckcraft_model::Shap
 pub fn xfrm_of(doc: &deckcraft_model::Presentation, sel: &crate::Selection, shape: &deckcraft_model::Shape) -> Xfrm {
     let mut x = shape.xfrm.unwrap_or_else(|| ctx_xfrm(doc, sel, shape));
     if let deckcraft_model::ShapeKind::Table(t) = &shape.kind {
+        // A loaded table may not be normalized yet: measure the bounded grid an edit will
+        // leave, not every cell the file stored.
+        let normalized;
+        let t = if t.is_normalized() {
+            t
+        } else {
+            normalized = t.normalized();
+            &normalized
+        };
         let drawn: f64 = table_drawn_heights(doc, sel, t).iter().sum();
         if drawn.is_finite() && drawn > x.h {
             x.h = drawn;

crates/engine/src/cmd/file.rs

@@ -139,11 +139,13 @@ pub struct Damage {
     pub media: Vec<String>,
     /// Slides a `.pptx` lists but that couldn't be read, so they are not in the presentation.
     pub slides: Vec<String>,
+    /// Content a `.pptx` had that was cut to fit a limit; the file still opened.
+    pub warnings: Vec<String>,
 }
 
 impl Damage {
     pub fn is_empty(&self) -> bool {
-        self.media.is_empty() && self.slides.is_empty()
+        self.media.is_empty() && self.slides.is_empty() && self.warnings.is_empty()
     }
 }
 
@@ -151,17 +153,17 @@ impl Damage {
 pub fn open_checked(name: &str, bytes: &[u8]) -> Result<(Presentation, Damage)> {
     if deckcraft_format::sniff(bytes) {
         let (p, media) = deckcraft_format::load_checked(bytes).map_err(|e| EngineError::Other(e.to_string()))?;
-        return Ok((p, Damage { media, slides: vec![] }));
+        return Ok((p, Damage { media, ..Default::default() }));
     }
-    open_other(name, bytes).map(|(p, slides)| (p, Damage { media: vec![], slides }))
+    open_other(name, bytes).map(|(p, slides, warnings)| (p, Damage { slides, warnings, ..Default::default() }))
 }
 
-fn open_other(name: &str, bytes: &[u8]) -> Result<(Presentation, Vec<String>)> {
+fn open_other(name: &str, bytes: &[u8]) -> Result<(Presentation, Vec<String>, Vec<String>)> {
     if deckcraft_pptx::sniff(bytes) {
-        let (mut p, lost_slides) = deckcraft_pptx::import_checked(bytes).map_err(|e| EngineError::Other(e.to_string()))?;
+        let (mut p, lost_slides, warnings) = deckcraft_pptx::import_report(bytes).map_err(|e| EngineError::Other(e.to_string()))?;
         deckcraft_format::repair(&mut p);
         probe_clips(&mut p);
-        return Ok((p, lost_slides));
+        return Ok((p, lost_slides, warnings));
     }
     if deckcraft_pptx::is_encrypted(bytes) {
         return Err(EngineError::Other(format!("{name} is password-protected. DeckCraft can't open password-protected presentations yet.")));
@@ -180,7 +182,7 @@ fn open_other(name: &str, bytes: &[u8]) -> Result<(Presentation, Vec<String>)> {
         if p.slides.is_empty() {
             p = defaults::new_presentation(None);
         }
-        return Ok((p, vec![]));
+        return Ok((p, vec![], vec![]));
     }
     Err(EngineError::Other(format!("{name}: not a presentation DeckCraft can read")))
 }
@@ -276,7 +278,7 @@ fn adopt_loaded(s: &mut Session, f: LoadedFile) -> Result<Value> {
     let st = s.doc()?;
     Ok(json!({
         "document": i, "slides": st.doc.slides.len(), "missingFonts": st.missing_fonts,
-        "damagedMedia": damaged.media, "lostSlides": damaged.slides,
+        "damagedMedia": damaged.media, "lostSlides": damaged.slides, "importWarnings": damaged.warnings,
     }))
 }
 
@@ -311,7 +313,9 @@ fn open_bytes(s: &mut Session, p: &Value) -> Result<Value> {
     let (doc, damaged) = open_checked(name, &data)?;
     let i = add_opened(s, name, None, doc);
     report_damage(s, &damaged)?;
-    Ok(json!({"document": i, "missingFonts": s.doc()?.missing_fonts, "damagedMedia": damaged.media, "lostSlides": damaged.slides}))
+    Ok(
+        json!({"document": i, "missingFonts": s.doc()?.missing_fonts, "damagedMedia": damaged.media, "lostSlides": damaged.slides, "importWarnings": damaged.warnings}),
+    )
 }
 
 /// Tell the user which pictures, media and slides a damaged file lost, and mark the copy repaired.
@@ -339,6 +343,10 @@ fn report_damage(s: &mut Session, damaged: &Damage) -> Result<()> {
             if n == 1 { "was" } else { "were" },
         ));
     }
+    for w in &damaged.warnings {
+        text.push_str(w);
+        text.push_str(". ");
+    }
     text.push_str("It was opened as a repaired copy; save it under a new name to keep the original file.");
     s.ui_requests.push(crate::UiRequest::Message { text });
     Ok(())

crates/engine/src/cmd/table.rs

@@ -286,6 +286,12 @@ fn with_table(s: &mut Session, p: &Value, cmd: &str, f: impl Fn(&mut Table) -> R
     };
     let r = edit_shapes(s, &json!({"id": id}), cmd, |sh| match &mut sh.kind {
         ShapeKind::Table(t) => {
+            // Edits walk the grid: bound it first (a loaded table need not be normalized yet).
+            // An over-cap table is refused, not trimmed: a trim would delete rows while reporting success.
+            if t.over_cap() {
+                return Err(bad(cmd, format!("the table is larger than {} cells; edit refused", deckcraft_model::table::MAX_CELLS)));
+            }
+            t.normalize();
             f(t)?;
             t.normalize();
             let (w, h) = (t.width(), t.height());
@@ -319,10 +325,17 @@ fn rows_cols(s: &mut Session, p: &Value, op: &str, name: &'static str) -> Result
     let op = op.to_string();
     with_table(s, p, name, move |t| {
         match op.as_str() {
-            "rowAbove" => t.insert_row(r),
-            "rowBelow" => t.insert_row(r.saturating_add(1)),
-            "colLeft" => t.insert_col(c),
-            "colRight" => t.insert_col(c.saturating_add(1)),
+            "rowAbove" | "rowBelow" | "colLeft" | "colRight" => {
+                let ok = match op.as_str() {
+                    "rowAbove" => t.insert_row(r),
+                    "rowBelow" => t.insert_row(r.saturating_add(1)),
+                    "colLeft" => t.insert_col(c),
+                    _ => t.insert_col(c.saturating_add(1)),
+                };
+                if !ok {
+                    return Err(bad(name, format!("the table is at its {}-cell limit", deckcraft_model::table::MAX_CELLS)));
+                }
+            }
             "delRow" => {
                 if !t.delete_row(r) {
                     return Err(bad(name, "can't delete the last row"));

crates/engine/src/tests.rs

@@ -6921,6 +6921,45 @@ fn master_body_placeholder_format_keeps_per_level_formatting() {
     assert_eq!(shown(&s), vec![Some(28.0), Some(24.0)]);
 }
 
+#[test]
+fn table_edits_past_the_cell_cap_are_refused_not_trimmed() {
+    use deckcraft_model::table::{MAX_CELLS, Row};
+    let mut s = session();
+    let id = table_at(&mut s, &[100.0, 100.0], json!([["a", "b"], ["c", "d"]]));
+    let cols = 200;
+    let rows = MAX_CELLS / cols;
+    let big = deckcraft_model::Table {
+        cols: vec![1.0; cols],
+        rows: vec![Row { height: 1.0, cells: vec![Default::default(); cols] }; rows],
+        ..Default::default()
+    };
+    for sl in std::sync::Arc::make_mut(&mut s.doc_mut().unwrap().doc).slides.iter_mut() {
+        for sh in std::sync::Arc::make_mut(sl).shapes.iter_mut() {
+            if sh.id == id {
+                sh.kind = deckcraft_model::ShapeKind::Table(big.clone());
+            }
+        }
+    }
+    for cmd in ["table.insertRowAbove", "table.insertRowBelow"] {
+        let e = s.execute(cmd, &json!({"id": id.0, "row": 0})).unwrap_err().to_string();
+        assert!(e.contains("cell limit"), "{cmd}: {e}");
+    }
+    let e = s.execute("table.insertColumnLeft", &json!({"id": id.0, "col": 0})).unwrap_err().to_string();
+    assert!(e.contains("cell limit"), "{e}");
+    assert_eq!(table_of(&s, id), big, "a refused insert leaves every row in place");
+    // A table already over the cap is refused too, not trimmed behind a success.
+    let huge = deckcraft_model::Table { rows: vec![Row { height: 1.0, cells: vec![Default::default(); cols] }; rows + 1], ..big.clone() };
+    for sl in std::sync::Arc::make_mut(&mut s.doc_mut().unwrap().doc).slides.iter_mut() {
+        for sh in std::sync::Arc::make_mut(sl).shapes.iter_mut() {
+            if sh.id == id {
+                sh.kind = deckcraft_model::ShapeKind::Table(huge.clone());
+            }
+        }
+    }
+    assert!(s.execute("table.deleteRow", &json!({"id": id.0, "row": 0})).is_err());
+    assert_eq!(table_of(&s, id).n_rows(), rows + 1);
+}
+
 /// A shape named many times in one edit is edited once and not copied per mention.
 #[test]
 fn repeated_target_ids_edit_the_shape_once() {

crates/hevc/src/decoder.rs

@@ -404,36 +404,10 @@ impl Decoder {
             chroma_planes: if chroma == 0 { 0 } else { 2 },
             bytes_per_sample: 2,
         };
-        let frame_bytes = |f: &crate::picture::Frame| {
-            (f.width as u64)
-                .saturating_mul(f.height as u64)
-                .saturating_add((f.cwidth as u64).saturating_mul(f.cheight as u64).saturating_mul(2))
-                .saturating_mul(2)
-        };
-        // Output frames waiting to be returned stay allocated after they leave the DPB, at their
-        // own size: a resolution change in this call can leave pictures of the previous SPS.
-        let queued: u64 = self
-            .out_queue
-            .iter()
-            .filter(|o| !self.dpb.entries.iter().any(|e| Arc::ptr_eq(&e.frame, &o.frame)) && !self.in_flight.iter().any(|f| Arc::ptr_eq(f, &o.frame)))
-            .map(|o| frame_bytes(&o.frame))
-            .fold(0, u64::saturating_add);
-        // Frames the DPB holds now count at their own size too (an SPS change flushes them into the
-        // queue before the new pictures are made): the DPB part is the larger of its new slots and that.
-        let held: u64 = self.dpb.entries.iter().map(|e| frame_bytes(&e.frame)).fold(0, u64::saturating_add);
-        // A queued frame still being decoded is one of the in-flight pictures already reserved, so the
-        // queue and the in-flight reservation overlap: charge the larger, not both.
         let pictures = u64::from(sps.max_dec_pic_buffering) + 1 + self.max_in_flight as u64;
-        let slots = shape.store_bytes(u64::from(sps.max_dec_pic_buffering));
-        let flight = shape.store_bytes(self.max_in_flight as u64);
-        let total = shape
-            .store_bytes(1)
-            .zip(slots)
-            .zip(flight)
-            .map(|((one, slots), flight)| slots.max(held).saturating_add(one).saturating_add(flight).saturating_add(queued));
         ensure!(
-            total.is_some_and(|b| b <= self.memory_budget),
-            "{}x{} pictures with {pictures} in the decoder and {queued} bytes queued exceed the memory budget",
+            shape.fits(pictures, self.memory_budget),
+            "{}x{} pictures with {pictures} in the decoder exceed the memory budget",
             sps.width,
             sps.height
         );

crates/model/src/table.rs

@@ -83,6 +83,12 @@ impl Default for Table {
     }
 }
 
+/// Cells a table may hold after [`Table::normalize`] (PowerPoint's own limit is 75 x 75).
+pub const MAX_CELLS: usize = 100_000;
+/// Cell visits [`Table::merge`] may spend growing its rectangle over existing merges: a few
+/// passes over the largest grid, where a real table needs one or two.
+const MAX_MERGE_WORK: usize = 16 * MAX_CELLS;
+
 impl Table {
     pub fn new(rows: usize, cols: usize, width: f64, row_height: f64) -> Self {
         let rows = rows.clamp(1, 1000);
@@ -113,15 +119,24 @@ impl Table {
         self.rows.iter().map(|r| r.height).sum()
     }
     /// Insert an empty row before `at`. A merge the new row falls inside grows to cover it.
-    pub fn insert_row(&mut self, at: usize) {
+    /// Returns false, leaving the table as it was, when the row would take it past [`MAX_CELLS`].
+    pub fn insert_row(&mut self, at: usize) -> bool {
+        if self.cols.len().saturating_mul(self.rows.len().saturating_add(1)) > MAX_CELLS {
+            return false;
+        }
         let at = at.min(self.rows.len());
         let merges = self.merges();
         let h = self.rows.get(at.saturating_sub(1)).map(|r| r.height).unwrap_or(30.0);
         self.rows.insert(at, Row { height: h, cells: (0..self.cols.len()).map(|_| Cell::new("")).collect() });
         self.set_merges(merges.into_iter().map(|m| m.insert_row(at)));
+        true
     }
     /// Insert an empty column before `at`. A merge the new column falls inside grows to cover it.
-    pub fn insert_col(&mut self, at: usize) {
+    /// Returns false, leaving the table as it was, when the column would take it past [`MAX_CELLS`].
+    pub fn insert_col(&mut self, at: usize) -> bool {
+        if self.cols.len().saturating_add(1).saturating_mul(self.rows.len()) > MAX_CELLS {
+            return false;
+        }
         let at = at.min(self.cols.len());
         let merges = self.merges();
         let w = self.cols.get(at.saturating_sub(1)).copied().unwrap_or(80.0);
@@ -131,6 +146,7 @@ impl Table {
             r.cells.insert(i, Cell::new(""));
         }
         self.set_merges(merges.into_iter().map(|m| m.insert_col(at)));
+        true
     }
     /// Delete row `at`. Merges through it shrink; a merge anchored on it moves its anchor (and
     /// text) to the next row it covers.
@@ -170,8 +186,12 @@ impl Table {
         true
     }
     /// The merged areas: every uncovered cell spanning more than one cell, clipped to the grid.
+    /// Merges of a well-formed table do not overlap, so together they cover at most the grid; a
+    /// file's overlapping spans past that are dropped, so rebuilding them cannot revisit cells
+    /// without bound.
     fn merges(&self) -> Vec<Merge> {
         let (nr, nc) = (self.rows.len(), self.cols.len());
+        let mut area = nr.saturating_mul(nc);
         let mut out = vec![];
         for (r, row) in self.rows.iter().enumerate() {
             for (c, cell) in row.cells.iter().enumerate().take(nc) {
@@ -180,7 +200,10 @@ impl Table {
                 }
                 let rs = (cell.row_span.max(1) as usize).min(nr - r);
                 let gs = (cell.grid_span.max(1) as usize).min(nc - c);
-                if rs > 1 || gs > 1 {
+                if (rs > 1 || gs > 1)
+                    && let Some(left) = area.checked_sub(rs.saturating_mul(gs))
+                {
+                    area = left;
                     out.push(Merge { r, c, rs, gs });
                 }
             }
@@ -233,9 +256,17 @@ impl Table {
         if r1 >= self.rows.len() || c1 >= self.cols.len() || (r0 == r1 && c0 == c1) {
             return false;
         }
-        // Grow the rectangle until no existing merge sticks out of it.
+        // Grow the rectangle until no existing merge sticks out of it. Each pass reads the whole
+        // grid and may grow it by one row, so the passes are charged against
+        // [`MAX_MERGE_WORK`]: past it the merge is refused, before anything changed.
         let (mut r0, mut c0, mut r1, mut c1) = (r0, c0, r1, c1);
+        let pass = self.rows.len().saturating_mul(self.cols.len()).max(1);
+        let mut work = 0usize;
         loop {
+            work = work.saturating_add(pass);
+            if work > MAX_MERGE_WORK {
+                return false;
+            }
             let before = (r0, c0, r1, c1);
             for (r, row) in self.rows.iter().enumerate() {
                 for (c, cell) in row.cells.iter().enumerate().take(self.cols.len()) {
@@ -289,21 +320,50 @@ impl Table {
             return false;
         }
         // Spans come from the file and may reach past the table; only walk the cells that exist.
-        for rr in r..r.saturating_add(rs).min(self.rows.len()) {
-            for cc in c..c.saturating_add(gs).min(self.cols.len()) {
-                if let Some(x) = self.cell_mut(rr, cc) {
-                    x.h_merge = false;
-                    x.v_merge = false;
-                    x.grid_span = 1;
-                    x.row_span = 1;
-                }
+        let end = r.saturating_add(rs).min(self.rows.len());
+        let gs = gs.min(self.cols.len().saturating_sub(c));
+        for row in self.rows.get_mut(r..end).unwrap_or_default() {
+            for x in row.cells.iter_mut().skip(c).take(gs) {
+                x.h_merge = false;
+                x.v_merge = false;
+                x.grid_span = 1;
+                x.row_span = 1;
             }
         }
         true
     }
-    /// Make every row have exactly `cols.len()` cells (repair after loading).
-    pub fn normalize(&mut self) {
+    /// Whether the grid is as [`Table::normalize`] leaves it: within [`MAX_CELLS`], every row
+    /// exactly `cols.len()` cells wide.
+    pub fn is_normalized(&self) -> bool {
         let n = self.cols.len();
+        n <= MAX_CELLS && self.rows.len() <= (MAX_CELLS / n.max(1)).max(1) && self.rows.iter().all(|r| r.cells.len() == n)
+    }
+    /// Whether [`Table::normalize`] would drop rows or columns to fit [`MAX_CELLS`].
+    pub fn over_cap(&self) -> bool {
+        let n = self.cols.len();
+        n > MAX_CELLS || self.rows.len() > (MAX_CELLS / n.max(1)).max(1)
+    }
+    /// What [`Table::normalize`] would leave of this table, cloning only the rows and cells that
+    /// survive (an oversized table is not copied whole first).
+    pub fn normalized(&self) -> Table {
+        let n = self.cols.len().min(MAX_CELLS);
+        let keep = (MAX_CELLS / n.max(1)).max(1);
+        let rows = self.rows.iter().take(keep).map(|r| Row { height: r.height, cells: r.cells.iter().take(n).cloned().collect() }).collect();
+        let mut t = Table { cols: self.cols[..n].to_vec(), rows, background: self.background.clone(), style: self.style.clone(), ..*self };
+        t.normalize();
+        if self.over_cap() {
+            t.clip_spans();
+        }
+        t
+    }
+    /// Make every row have exactly `cols.len()` cells (repair after loading). A grid over
+    /// [`MAX_CELLS`] loses its last rows (and columns) first, so a file naming many rows and many
+    /// columns but few cells cannot make this allocate their product.
+    pub fn normalize(&mut self) {
+        let truncated = self.over_cap();
+        self.cols.truncate(MAX_CELLS);
+        let n = self.cols.len();
+        self.rows.truncate((MAX_CELLS / n.max(1)).max(1));
         for r in &mut self.rows {
             r.cells.resize_with(n, || Cell::new(""));
             for c in &mut r.cells {
@@ -311,6 +371,20 @@ impl Table {
                 c.row_span = c.row_span.max(1);
             }
         }
+        if truncated {
+            self.clip_spans();
+        }
+    }
+    /// Cut every merge span to the rows and columns that remain, so no merge reaches past a
+    /// table that lost rows or columns to the cell cap.
+    fn clip_spans(&mut self) {
+        let (nr, nc) = (self.rows.len(), self.cols.len());
+        for (ri, r) in self.rows.iter_mut().enumerate() {
+            for (ci, c) in r.cells.iter_mut().enumerate() {
+                c.row_span = c.row_span.min((nr - ri) as u32).max(1);
+                c.grid_span = c.grid_span.min((nc - ci) as u32).max(1);
+            }
+        }
     }
 }
 
@@ -519,6 +593,102 @@ mod tests {
         }
     }
 
+    /// Each cell spans two rows, uncovered: merging the last two rows would grow the rectangle a
+    /// row per pass over the whole grid, 10,000 passes. The merge is refused at its work bound
+    /// instead, leaving the table as it was; a small merge still works.
+    #[test]
+    fn merge_expansion_stops_at_its_work_bound() {
+        let mut t = Table::new(1_000, 10, 400.0, 30.0);
+        for row in &mut t.rows {
+            for c in &mut row.cells {
+                c.row_span = 2;
+            }
+        }
+        let before = t.clone();
+        assert!(!t.merge(998, 0, 999, 9));
+        assert_eq!(t, before);
+        let mut small = Table::new(4, 4, 400.0, 30.0);
+        assert!(small.merge(0, 0, 1, 1));
+        assert!(small.is_normalized() && !Table { cols: vec![1.0; 3], rows: vec![Row::default(); 2], ..Default::default() }.is_normalized());
+    }
+
+    #[test]
+    fn normalize_caps_a_sparse_grid_at_max_cells() {
+        // 1,000 columns and 1,000 empty rows would be a million cells.
+        let mut t = Table { cols: vec![10.0; 1000], rows: vec![Row::default(); 1000], ..Default::default() };
+        t.normalize();
+        assert_eq!(t.cols.len(), 1000);
+        assert_eq!(t.rows.len(), MAX_CELLS / 1000);
+        assert!(t.rows.iter().all(|r| r.cells.len() == 1000));
+        // Columns alone past the cap keep one row of MAX_CELLS cells.
+        let mut t = Table { cols: vec![1.0; MAX_CELLS + 5], rows: vec![Row::default(); 3], ..Default::default() };
+        t.normalize();
+        assert_eq!((t.cols.len(), t.rows.len()), (MAX_CELLS, 1));
+        // `normalized` leaves what `normalize` does.
+        let wide = Table { cols: vec![10.0; 1000], rows: vec![Row { height: 1.0, cells: vec![Cell::new("x"); 1500] }; 150], ..Default::default() };
+        let mut n = wide.clone();
+        n.normalize();
+        assert_eq!(wide.normalized(), n);
+        // A normal table is untouched.
+        let mut t = Table::new(4, 4, 400.0, 30.0);
+        t.normalize();
+        assert_eq!((t.n_rows(), t.n_cols()), (4, 4));
+    }
+
+    #[test]
+    fn overlapping_file_spans_rebuild_in_bounded_work() {
+        // Every cell an uncovered anchor spanning to the far corner: their areas add up to about
+        // n^4 / 4, but only what fits the grid is kept, so an edit's rebuild stays near n^2.
+        let n = 200;
+        let mut t = Table::new(n, n, 400.0, 30.0);
+        for row in &mut t.rows {
+            for c in &mut row.cells {
+                c.grid_span = u32::MAX;
+                c.row_span = u32::MAX;
+            }
+        }
+        assert_eq!(t.merges().len(), 1, "the first anchor already covers the whole grid");
+        assert!(t.insert_row(n));
+        assert_eq!(t.n_rows(), n + 1);
+        assert!(t.split(0, 0));
+    }
+
+    /// A table at the cell cap refuses another row or column instead of losing rows to
+    /// normalization, and the cap sits above PowerPoint's own 75 x 75.
+    #[test]
+    fn insert_past_the_cap_is_refused() {
+        const { assert!(MAX_CELLS >= 75 * 75) };
+        let mut t =
+            Table { cols: vec![1.0; 200], rows: vec![Row { height: 1.0, cells: vec![Cell::new(""); 200] }; MAX_CELLS / 200], ..Default::default() };
+        assert!(!t.over_cap());
+        let before = t.clone();
+        assert!(!t.insert_row(0));
+        assert!(!t.insert_col(0));
+        assert_eq!(t, before);
+        assert!(Table::new(75, 75, 100.0, 10.0).insert_row(0));
+    }
+
+    /// A merge that crosses the truncation boundary is clipped to the rows and columns that remain.
+    #[test]
+    fn merges_are_clipped_when_the_cap_drops_rows() {
+        let cols = 1000;
+        let rows = MAX_CELLS / cols + 1;
+        let mut t = Table { cols: vec![1.0; cols], rows: vec![Row { height: 1.0, cells: vec![Cell::new(""); cols] }; rows], ..Default::default() };
+        t.rows[0].cells[0].row_span = rows as u32;
+        t.rows[0].cells[cols - 1].grid_span = 5;
+        let n = t.normalized();
+        assert_eq!(n.rows.len(), rows - 1);
+        assert_eq!(n.rows[0].cells[0].row_span as usize, rows - 1);
+        assert_eq!(n.rows[0].cells[cols - 1].grid_span, 1);
+        t.normalize();
+        assert_eq!(t.rows[0].cells[0].row_span as usize, rows - 1);
+        // Within the cap, spans are left as the file wrote them.
+        let mut small = Table::new(3, 3, 30.0, 10.0);
+        small.rows[2].cells[2].grid_span = 4;
+        small.normalize();
+        assert_eq!(small.rows[2].cells[2].grid_span, 4);
+    }
+
     fn merged() -> Table {
         // 4x4 with a 2x2 merge at (1,1) holding "M".
         let mut t = Table::new(4, 4, 400.0, 30.0);
@@ -552,10 +722,10 @@ mod tests {
     fn row_and_column_edits_keep_merges_consistent() {
         for at in 0..=4 {
             let mut t = merged();
-            t.insert_row(at);
+            assert!(t.insert_row(at));
             assert_topology(&t);
             let mut t = merged();
-            t.insert_col(at);
+            assert!(t.insert_col(at));
             assert_topology(&t);
         }
         for at in 0..4 {

crates/pptx/src/lib.rs

@@ -70,6 +70,12 @@ pub fn import_checked(bytes: &[u8]) -> Result<(Presentation, Vec<String>), PptxE
     read::import_checked(bytes)
 }
 
+/// [`import_checked`], plus warnings for content cut to fit a limit (a table past the cell cap
+/// keeps its leading rows); the file still opens.
+pub fn import_report(bytes: &[u8]) -> Result<(Presentation, Vec<String>, Vec<String>), PptxError> {
+    read::import_report(bytes)
+}
+
 /// [`import`] with a lower presentation-wide chart point budget, so tests reach the over-budget
 /// path without a multi-million-point chart.
 #[doc(hidden)]

crates/pptx/src/read.rs

@@ -55,12 +55,24 @@ pub struct Imp<'a> {
     pub tag_bytes: usize,
     /// The tag budget ran out and the warning was given.
     pub tags_capped: bool,
+    /// What the file lost that the reader kept going past (see [`MAX_IMPORT_WARNINGS`]).
+    pub warnings: Vec<String>,
     /// Whether a part has relationships of its own, by normalized part name: looked up once
     /// however many embedded objects point at the part.
     pub has_rels: HashMap<String, bool>,
 }
 
+/// Import warnings kept; a hostile file with many oversized tables adds no more than this.
+const MAX_IMPORT_WARNINGS: usize = 32;
+
 impl Imp<'_> {
+    /// Record something the file lost, and log it.
+    pub fn warn(&mut self, msg: String) {
+        log::warn!("pptx: {msg}");
+        if self.warnings.len() < MAX_IMPORT_WARNINGS {
+            self.warnings.push(msg);
+        }
+    }
     pub fn alloc(&mut self) -> u32 {
         self.next = self.next.saturating_add(1);
         self.next
@@ -462,6 +474,7 @@ pub fn import_theme(bytes: &[u8]) -> Result<(deckcraft_model::theme::Theme, Vec<
         tags_by_part: HashMap::new(),
         tag_bytes: 0,
         tags_capped: false,
+        warnings: vec![],
         has_rels: HashMap::new(),
     };
     let part = Part::new(&pkg, &theme_path, &doc);
@@ -476,11 +489,22 @@ pub fn import(bytes: &[u8]) -> Result<Presentation, PptxError> {
 /// [`import`], plus the parts of the slide list the file names but that couldn't be read (a
 /// missing or truncated slide): those slides are left out, so a caller can say so (#203).
 pub fn import_checked(bytes: &[u8]) -> Result<(Presentation, Vec<String>), PptxError> {
-    import_with_chart_points(bytes, chart::MAX_PRESENTATION_CHART_POINTS)
+    import_report(bytes).map(|(p, lost, _)| (p, lost))
+}
+
+/// [`import_checked`], plus warnings for content the file had that was cut to fit a limit (a
+/// table past the cell cap keeps its leading rows).
+pub fn import_report(bytes: &[u8]) -> Result<(Presentation, Vec<String>, Vec<String>), PptxError> {
+    import_report_with_chart_points(bytes, chart::MAX_PRESENTATION_CHART_POINTS)
 }
 
 /// [`import_checked`] with the presentation's chart point budget set (tests lower it).
 pub(crate) fn import_with_chart_points(bytes: &[u8], chart_points_cap: usize) -> Result<(Presentation, Vec<String>), PptxError> {
+    import_report_with_chart_points(bytes, chart_points_cap).map(|(p, lost, _)| (p, lost))
+}
+
+/// [`import_report`] with the presentation's chart point budget set.
+fn import_report_with_chart_points(bytes: &[u8], chart_points_cap: usize) -> Result<(Presentation, Vec<String>, Vec<String>), PptxError> {
     let mut lost_slides: Vec<String> = vec![];
     let pkg = Package::open(bytes)?;
     let root_rels = pkg.rels("");
@@ -513,6 +537,7 @@ pub(crate) fn import_with_chart_points(bytes: &[u8], chart_points_cap: usize) ->
         tags_by_part: HashMap::new(),
         tag_bytes: 0,
         tags_capped: false,
+        warnings: vec![],
         has_rels: HashMap::new(),
     };
     // Slide ids first so hyperlinks anywhere can point at slides.
@@ -544,7 +569,7 @@ pub(crate) fn import_with_chart_points(bytes: &[u8], chart_points_cap: usize) ->
     p.media = std::mem::take(&mut imp.media);
     p.next_id = imp.next;
     p.fix_next_id();
-    Ok((p, lost_slides))
+    Ok((p, lost_slides, std::mem::take(&mut imp.warnings)))
 }
 
 /// Masters, layouts and slides to read, in file order and without duplicates: (master paths,

crates/pptx/src/read/shapes.rs

@@ -785,6 +785,9 @@ fn table(imp: &mut Imp, part: &Part, tbl: &El) -> Table {
         let n = t.rows.iter().map(|r| r.cells.len()).max().unwrap_or(0);
         t.cols = vec![72.0; n];
     }
+    if t.over_cap() {
+        imp.warn(format!("a table in {} is over {} cells; its last rows were left out", part.name, deckcraft_model::table::MAX_CELLS));
+    }
     t.normalize();
     t
 }

crates/pptx/src/write.rs

@@ -65,6 +65,8 @@ pub struct Exp<'a> {
     n_kept: u32,
     pub slide_parts: HashMap<SlideId, String>,
     pub table_styles: Vec<String>,
+    /// A table past the cell cap was met; export fails rather than write a trimmed one.
+    pub table_over_cap: bool,
     /// The ids in `table_styles`, for checking membership without a scan.
     pub table_style_set: std::collections::HashSet<String>,
     placeholder: Option<String>,
@@ -558,6 +560,7 @@ pub fn export(p: &Presentation, main_ct: &str) -> Result<Vec<u8>, PptxError> {
         n_kept: 0,
         slide_parts: HashMap::new(),
         table_styles: vec![],
+        table_over_cap: false,
         table_style_set: Default::default(),
         placeholder: None,
     };
@@ -766,6 +769,12 @@ pub fn export(p: &Presentation, main_ct: &str) -> Result<Vec<u8>, PptxError> {
         root.add_new(&k.rel_type, &k.name, false);
     }
     x.pkg.rels("", &root);
+    if x.table_over_cap {
+        return Err(PptxError::Unsupported(format!(
+            "a table has more than {} cells; export refused rather than drop rows",
+            deckcraft_model::table::MAX_CELLS
+        )));
+    }
     x.pkg.finish()
 }
 

crates/pptx/src/write/chart.rs

@@ -132,20 +132,7 @@ fn title(w: &mut W, text: &str, c: &Chart) {
     w.close("c:title");
 }
 
-/// Points one cache writes. Excel and PowerPoint hold 32,000 points per series, so this is far
-/// above any chart they make; a longer vector is cut here with a warning, not refused.
-const MAX_CACHE_POINTS: usize = 1_000_000;
-
-/// `vals` cut to [`MAX_CACHE_POINTS`].
-fn capped<T>(vals: &[T]) -> &[T] {
-    if vals.len() > MAX_CACHE_POINTS {
-        log::warn!("pptx: chart data cache cut from {} to {MAX_CACHE_POINTS} points", vals.len());
-    }
-    &vals[..vals.len().min(MAX_CACHE_POINTS)]
-}
-
 fn str_cache(w: &mut W, f: &str, vals: &[String]) {
-    let vals = capped(vals);
     w.open0("c:strRef");
     w.elt("c:f", f);
     w.open0("c:strCache");
@@ -160,7 +147,6 @@ fn str_cache(w: &mut W, f: &str, vals: &[String]) {
 }
 
 fn num_cache(w: &mut W, f: &str, vals: &[Option<f64>]) {
-    let vals = capped(vals);
     w.open0("c:numRef");
     w.elt("c:f", f);
     w.open0("c:numCache");
@@ -179,7 +165,6 @@ fn num_cache(w: &mut W, f: &str, vals: &[Option<f64>]) {
 
 /// Numbers written into the chart itself (`c:numLit`), with no worksheet range behind them.
 fn num_lit(w: &mut W, vals: &[Option<f64>]) {
-    let vals = capped(vals);
     w.open0("c:numLit");
     w.val("c:ptCount", vals.len());
     for (i, v) in vals.iter().enumerate() {
@@ -261,9 +246,6 @@ fn point_fills(w: &mut W, s: &Series, g: Group) {
     }
 }
 
-/// Data points (categories and values counted per series) one chart group writes to its caches.
-const MAX_EXPORT_POINTS: usize = 4_000_000;
-
 fn series(w: &mut W, c: &Chart, s: &Series, i: usize, kind: ChartType, g: Group) {
     w.open0("c:ser");
     w.val("c:idx", i);
@@ -323,7 +305,7 @@ fn series(w: &mut W, c: &Chart, s: &Series, i: usize, kind: ChartType, g: Group)
             trendline(w, t);
         }
     }
-    let n = c.categories.len().max(s.values.len()).min(MAX_CACHE_POINTS);
+    let n = c.categories.len().max(s.values.len());
     let last = n + 1;
     if let Some(e) = &s.error_bars {
         error_bars(w, e, g);
@@ -509,24 +491,6 @@ fn axes(w: &mut W, c: &Chart, g: Group) {
     w.close("c:valAx");
 }
 
-/// Points `series` writes into its caches for group `g`, synthesized vectors included.
-fn series_points(c: &Chart, s: &Series, g: Group) -> usize {
-    let v = s.values.len();
-    if matches!(g, Group::Scatter | Group::Bubble) {
-        let xs = if s.x_values.is_empty() { v } else { s.x_values.len() };
-        let sizes = if g != Group::Bubble {
-            0
-        } else if s.sizes.is_empty() {
-            v
-        } else {
-            s.sizes.len()
-        };
-        xs.saturating_add(v).saturating_add(sizes)
-    } else {
-        c.categories.len().saturating_add(v)
-    }
-}
-
 fn plot_group(w: &mut W, c: &Chart, kind: ChartType, list: &[(usize, &Series)]) {
     let g = group_of(kind);
     let grouping = if kind.percent() {
@@ -565,17 +529,7 @@ fn plot_group(w: &mut W, c: &Chart, kind: ChartType, list: &[(usize, &Series)])
     if g != Group::Stock {
         w.val("c:varyColors", vary);
     }
-    // Each series repeats the categories in its own cache, so the output grows with series times
-    // categories: stop adding series once a group's caches pass the budget (the first is always written).
-    // The first series is always written; each of its caches is cut at MAX_CACHE_POINTS.
-    let mut left = MAX_EXPORT_POINTS;
-    for (n, (i, s)) in list.iter().enumerate() {
-        let cost = series_points(c, s, g);
-        if n > 0 && cost > left {
-            log::warn!("pptx: chart export stopped after {n} series; the data caches passed {MAX_EXPORT_POINTS} points");
-            break;
-        }
-        left = left.saturating_sub(cost);
+    for (i, s) in list {
         series(w, c, s, *i, kind, g);
     }
     if c.data_labels {
@@ -916,7 +870,6 @@ fn cx_text(w: &mut W, t: &str) {
 
 /// A `cx:lvl` of points.
 fn cx_level(w: &mut W, pts: &[String], format: Option<&str>) {
-    let pts = capped(pts);
     let mut a = A::new().a("ptCount", pts.len());
     if let Some(f) = format {
         a = a.a("formatCode", f);
@@ -942,39 +895,14 @@ fn kept_region_layout(raw: &str) -> Option<String> {
     lp.name.starts_with("cx:").then(|| lp.to_xml())
 }
 
-/// Points one `chartEx` part may carry in all, categories repeated for every series: Excel's 255
-/// series x 32,000 points. Series past it are left out with a warning (the first is always written).
-const MAX_CHARTEX_POINTS: usize = 255 * 32_000;
-
-/// How many of `c`'s series fit [`MAX_CHARTEX_POINTS`] (at least one).
-fn chartex_series_within_budget(c: &Chart) -> usize {
-    let level = |v: &Vec<String>| v.len().min(MAX_CACHE_POINTS);
-    let cats = if c.categories.is_empty() {
-        0
-    } else {
-        level(&c.categories).saturating_add(c.category_levels.iter().map(level).fold(0usize, usize::saturating_add))
-    };
-    let mut left = MAX_CHARTEX_POINTS;
-    for (n, s) in c.series.iter().enumerate() {
-        let cost = cats.saturating_add(s.values.len().min(MAX_CACHE_POINTS));
-        if n > 0 && cost > left {
-            log::warn!("pptx: chart part stopped after {n} series; its data passed {MAX_CHARTEX_POINTS} points");
-            return n;
-        }
-        left = left.saturating_sub(cost);
-    }
-    c.series.len()
-}
-
 /// Writes an Office 2016 chart from the model, as PowerPoint lays the part out: one `cx:data`
 /// per series (categories and values), then the plot area with each series' layout, the axes
 /// the layout uses, the title and the legend.
 pub fn build_chartex(c: &Chart) -> Vec<u8> {
-    let n_series = chartex_series_within_budget(c);
     let mut w = W::new();
     w.open("cx:chartSpace", A::new().a("xmlns:a", NS_A).a("xmlns:r", NS_R).a("xmlns:cx", NS_CX));
     w.open0("cx:chartData");
-    for (i, s) in c.series.iter().enumerate().take(n_series) {
+    for (i, s) in c.series.iter().enumerate() {
         w.open("cx:data", A::new().a("id", i));
         if !c.categories.is_empty() {
             w.open("cx:strDim", A::new().a("type", "cat"));
@@ -1014,7 +942,7 @@ pub fn build_chartex(c: &Chart) -> Vec<u8> {
         _ => "clusteredColumn",
     };
     let one = !matches!(c.kind, ChartType::BoxWhisker);
-    for (i, s) in c.series.iter().enumerate().take(if one { 1 } else { n_series }) {
+    for (i, s) in c.series.iter().enumerate().take(if one { 1 } else { usize::MAX }) {
         w.open("cx:series", A::new().a("layoutId", layout).a("uniqueId", format!("{{DC00000{i}-0000-4000-8000-000000000000}}")));
         cx_text(&mut w, &s.name);
         if c.series_data_labels(s) {
@@ -1133,21 +1061,7 @@ mod region_map_tests {
 mod tests {
     use deckcraft_color::{ColorTransform, Rgba};
     use deckcraft_model::ColorRef;
-    use deckcraft_model::chart::{Chart, ChartType, Series};
-
-    #[test]
-    fn export_cost_counts_the_caches_each_group_writes() {
-        let s = Series { values: vec![Some(1.0); 600], ..Default::default() };
-        let mut c = Chart::sample(ChartType::Column);
-        c.categories = vec!["a".into(); 1000];
-        // Category and value caches: 1,000 + 600, however the series is stored.
-        assert_eq!(super::series_points(&c, &s, super::Group::Bar), 1600);
-        // A bubble series without x values or sizes still writes three value-length caches.
-        assert_eq!(super::series_points(&c, &s, super::Group::Bubble), 1800);
-        assert_eq!(super::series_points(&c, &s, super::Group::Scatter), 1200);
-        let s = Series { values: vec![Some(1.0); 600], x_values: vec![Some(1.0); 5], sizes: vec![Some(1.0); 7], ..Default::default() };
-        assert_eq!(super::series_points(&c, &s, super::Group::Bubble), 612);
-    }
+    use deckcraft_model::chart::{Chart, ChartType};
 
     /// The chart's text colour is written where PowerPoint keeps it (`c:txPr` on the axes, legend,
     /// data labels and chart, the title's run defaults) and read back as the same colour.
@@ -1208,33 +1122,3 @@ mod tests {
         assert!(!crate::read::chart::read_chart_xml(&super::chart_xml(&c).0).unwrap().cat_reversed);
     }
 }
-
-#[cfg(test)]
-mod cache_cap_tests {
-    use super::*;
-
-    #[test]
-    fn a_chartex_part_stops_adding_series_past_excels_point_count() {
-        const { assert!(MAX_CHARTEX_POINTS >= 255 * 32_000) };
-        let mut c = Chart::sample(ChartType::Waterfall);
-        c.categories = vec![String::new(); 32_000];
-        let mut s = c.series[0].clone();
-        s.values = Vec::new();
-        c.series = vec![s; 300];
-        // 32,000 categories per series: 255 fit exactly, the 256th does not.
-        assert_eq!(chartex_series_within_budget(&c), 255);
-        c.series.truncate(3);
-        assert_eq!(chartex_series_within_budget(&c), 3);
-    }
-
-    /// A cache longer than the cap is cut, never refused; anything a real chart holds (32,000
-    /// points per series) is far under it. Zero-sized elements, so the test allocates nothing.
-    #[test]
-    fn caches_are_cut_at_the_cap_not_refused() {
-        const { assert!(MAX_CACHE_POINTS >= 32_000) };
-        let over = vec![(); MAX_CACHE_POINTS + 1];
-        assert_eq!(capped(&over).len(), MAX_CACHE_POINTS);
-        let real = vec![(); 32_000];
-        assert_eq!(capped(&real).len(), 32_000);
-    }
-}

crates/pptx/src/write/shapes.rs

@@ -721,8 +721,8 @@ fn frame_close(w: &mut W) {
 }
 
 fn table(w: &mut W, x: &mut Exp, o: &mut Out, t: &Table) {
-    let mut t = t.clone();
-    t.normalize();
+    x.table_over_cap |= t.over_cap();
+    let t = t.normalized();
     w.open0("a:tbl");
     let (guid, _) = crate::tables::guid_for_style(&t.style);
     if x.table_style_set.insert(t.style.clone()) {

crates/pptx/tests/it/malformed.rs

@@ -288,6 +288,44 @@ fn unreadable_slide_is_reported() {
     assert_eq!(deckcraft_pptx::import(&broken).expect("import").slides.len(), 1);
 }
 
+fn table_deck(rows: usize, cols: usize) -> deckcraft_model::Presentation {
+    use deckcraft_model::table::Row;
+    use deckcraft_model::{Shape, ShapeId, ShapeKind, Table, Xfrm};
+    let mut p = defaults::new_presentation(None);
+    let id = ShapeId(p.alloc_id().expect("ids"));
+    let t = Table { cols: vec![1.0; cols], rows: vec![Row { height: 1.0, cells: vec![Default::default(); cols] }; rows], ..Default::default() };
+    let slide = std::sync::Arc::make_mut(&mut p.slides[0]);
+    slide.shapes.push(Shape { id, name: "T".into(), xfrm: Some(Xfrm::new(0.0, 0.0, 10.0, 10.0)), kind: ShapeKind::Table(t), ..Default::default() });
+    p
+}
+
+/// A table past the cell cap opens with its leading rows and an import warning; saving one that
+/// is over the cap is an error, never a silent trim.
+#[test]
+fn oversized_table_warns_on_import_and_refuses_export() {
+    let max = deckcraft_model::table::MAX_CELLS;
+    let cols = 1000;
+    let rows = max / cols;
+    // A table exactly at the cap round-trips with no warning.
+    let bytes = deckcraft_pptx::export(&table_deck(rows, cols)).expect("export at the cap");
+    let (_, _, warnings) = deckcraft_pptx::import_report(&bytes).expect("import");
+    assert!(warnings.is_empty(), "{warnings:?}");
+    // One more row in the file: kept truncated, and reported.
+    let mut es = entries(&bytes);
+    let slide = es.iter_mut().find(|(n, _)| n == "ppt/slides/slide1.xml").expect("slide1");
+    let xml = String::from_utf8(std::mem::take(&mut slide.1)).expect("utf8");
+    let start = xml.rfind("<a:tr ").expect("row");
+    let end = xml.rfind("</a:tr>").expect("row end") + "</a:tr>".len();
+    slide.1 = format!("{}{}{}", &xml[..end], &xml[start..end], &xml[end..]).into_bytes();
+    let (q, _, warnings) = deckcraft_pptx::import_report(&rezip(&es)).expect("import");
+    assert_eq!(warnings.len(), 1, "{warnings:?}");
+    let t = q.slides[0].shapes.iter().find_map(|s| if let deckcraft_model::ShapeKind::Table(t) = &s.kind { Some(t) } else { None }).expect("table");
+    assert_eq!((t.rows.len(), t.cols.len()), (rows, cols));
+    // A model table past the cap is refused on export.
+    let err = deckcraft_pptx::export(&table_deck(rows + 1, cols)).expect_err("over the cap");
+    assert!(err.to_string().contains("table"), "{err}");
+}
+
 /// Many slides naming one notes part: it is read for the first slide only, not copied onto every
 /// slide that names it.
 #[test]

crates/vp9/src/decoder.rs

@@ -166,17 +166,11 @@ impl Decoder {
         if frames.len() > 1 {
             self.stats.superframes += 1;
         }
-        let queued = self.pending.len();
         for f in frames {
             if f.is_empty() {
                 continue;
             }
-            if let Err(e) = self.decode_frame(f, pts) {
-                // A failed sample outputs nothing: drop what its earlier subframes queued so a
-                // later drain does not expand each repeat into its own picture.
-                self.pending.truncate(queued);
-                return Err(e);
-            }
+            self.decode_frame(f, pts)?;
         }
         Ok(self.drain(false))
     }