M6: .fig export writes image adjustments (#2297)

An image paint's adjustments (exposure, contrast, saturation, temperature, tint, highlights, shadows) were dropped on export with a warning, although the importer already reads them. The export now writes them as the paint's `paintFilter`: seven floats, with saturation as vibrance and the tint's sign flipped to the file's (positive towards magenta). A paint without adjustments gets no `paintFilter`. The warning is gone.

The schema gains `PaintFilterMessage` and `Paint.paintFilter`. A round-trip test turns the importer's fixture around and pins the written values and field numbers. Not checked in other software.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Model-Effort: Opus 5.5 drove; Fable 5.2 briefed; Sonnet 5.5 wrote at medium

crates/format/src/fig/export.rs

@@ -141,7 +141,8 @@ message StyleId GUID guid=1
 message VariableID GUID guid=1
 message VariableSetID GUID guid=1
 message ColorStopVar Color color=1, VariableData colorVar=2, float position=3
-message Paint PaintType type=1, Color color=2, float opacity=3, bool visible=4, BlendMode blendMode=5, ColorStop[] stops=6, Matrix transform=7, Image image=8, ImageScaleMode imageScaleMode=10, float rotation=11, float scale=12, VariableData colorVar=21, ColorStopVar[] stopsVar=23
+message PaintFilterMessage float tint=1, float shadows=2, float highlights=3, float exposure=5, float temperature=7, float vibrance=8, float contrast=9
+message Paint PaintType type=1, Color color=2, float opacity=3, bool visible=4, BlendMode blendMode=5, ColorStop[] stops=6, Matrix transform=7, Image image=8, ImageScaleMode imageScaleMode=10, float rotation=11, float scale=12, PaintFilterMessage paintFilter=14, VariableData colorVar=21, ColorStopVar[] stopsVar=23
 message Effect EffectType type=1, Color color=2, Vector offset=3, float radius=4, bool visible=5, BlendMode blendMode=6, float spread=7, bool showShadowBehindNode=8, BlurOpType blurOpType=19, float startRadius=21, Vector startOffset=20, Vector endOffset=28, NoiseType noiseType=26, Vector noiseSize=22, float density=25, float opacity=27, Color secondaryColor=24, bool clipToShape=23, VariableData radiusVar=9, VariableData colorVar=10, VariableData spreadVar=11, VariableData xVar=12, VariableData yVar=13, VariableData startRadiusVar=45
 struct FontName string family, string style, string postscript
 struct Number float value, NumberUnits units

crates/format/src/fig/export/paint.rs

@@ -76,8 +76,21 @@ impl<'d> Exporter<'d> {
                 if let (ImageScaleMode::Crop, Some(c)) = (img.scale_mode, img.crop) {
                     f.push(("transform", matrix(Affine::new(c))));
                 }
-                if img.filters != Default::default() {
-                    self.warn("image adjustments (exposure, contrast, …) were left out");
+                if !img.filters.is_identity() {
+                    let x = &img.filters;
+                    // The file's tint is positive towards magenta, ours towards green; `0.0 -` keeps zero positive.
+                    f.push((
+                        "paintFilter",
+                        o(vec![
+                            ("exposure", fl(f64::from(x.exposure))),
+                            ("contrast", fl(f64::from(x.contrast))),
+                            ("vibrance", fl(f64::from(x.saturation))),
+                            ("temperature", fl(f64::from(x.temperature))),
+                            ("tint", fl(0.0 - f64::from(x.tint))),
+                            ("highlights", fl(f64::from(x.highlights))),
+                            ("shadows", fl(f64::from(x.shadows))),
+                        ]),
+                    ));
                 }
             }
             PaintKind::Pattern(_) => {

crates/format/src/fig/image_filter_tests.rs

@@ -16,8 +16,8 @@ fn image_filter_schema() -> Schema {
     Schema::parse(&text).unwrap()
 }
 
-#[test]
-fn image_filters_import_from_current_container_and_skip_ambiguous_data() {
+/// A file with one image rectangle per filter case (current container, legacy, both, neutral, unknown fields).
+fn image_filter_fixture() -> Vec<u8> {
     let filter = |fields: Vec<(&'static str, Kv<'static>)>| o(fields);
     let image_paint = |id: u64, name: &'static str, mut extra: Vec<(&'static str, Kv<'static>)>| {
         let mut paint = vec![("type", e("IMAGE")), ("image", o(vec![("hash", Kv::Bytes(HASH.to_vec()))]))];
@@ -54,7 +54,12 @@ fn image_filters_import_from_current_container_and_skip_ambiguous_data() {
             vec![("paintFilter", filter(vec![("brightness", f(0.4)), ("detail", f(-0.2)), ("vignette", f(0.3)), ("mystery", f(0.1))]))],
         ),
     ];
-    let bytes = zip_file(&canvas(&image_filter_schema(), &o(vec![("nodeChanges", arr(nodes))])));
+    zip_file(&canvas(&image_filter_schema(), &o(vec![("nodeChanges", arr(nodes))])))
+}
+
+#[test]
+fn image_filters_import_from_current_container_and_skip_ambiguous_data() {
+    let bytes = image_filter_fixture();
     let (doc, warnings) = import(&bytes, "ImageFilters.fig").unwrap();
     let get = |name: &str| {
         let node = doc.nodes().find(|node| node.name == name).unwrap();
@@ -102,3 +107,57 @@ fn warnings_naming_unknown_filter_fields_are_capped() {
     let named = warnings.iter().filter(|w| w.contains("unsupported image filter")).count();
     assert!((100..=crate::rest::MAX_WARNINGS).contains(&named), "{named} of {} warnings", warnings.len());
 }
+
+#[test]
+fn image_adjustments_survive_a_fig_export() {
+    let (doc, _) = import(&image_filter_fixture(), "ImageFilters.fig").unwrap();
+    let filters_of = |doc: &figcraft_doc::Document, name: &str| {
+        let node = doc.nodes().find(|node| node.name == name).unwrap();
+        let figcraft_doc::color::PaintKind::Image(image) = &node.fills[0].kind else { panic!("{name} is not an image fill") };
+        image.filters
+    };
+    let (bytes, warnings) = export::export(&doc, None).unwrap();
+    assert!(!warnings.iter().any(|w| w.contains("image adjustments")), "{warnings:?}");
+    let (back, _) = import(&bytes, "Back.fig").unwrap();
+    for name in ["Current", "Negative tint", "Neutral"] {
+        let (a, b) = (filters_of(&doc, name), filters_of(&back, name));
+        for (x, y) in [
+            (a.exposure, b.exposure),
+            (a.contrast, b.contrast),
+            (a.saturation, b.saturation),
+            (a.temperature, b.temperature),
+            (a.tint, b.tint),
+            (a.highlights, b.highlights),
+            (a.shadows, b.shadows),
+        ] {
+            assert!((x - y).abs() < 1e-6, "{name}: {a:?} came back as {b:?}");
+        }
+    }
+    assert!(filters_of(&back, "Neutral").is_identity());
+    assert!(!filters_of(&back, "Current").is_identity());
+
+    // What is written: the file's names and signs.
+    let archive = Archive::open(&bytes).unwrap();
+    let (schema, message) = decode_canvas(&archive.canvas).unwrap();
+    let msg = schema.decode_message(schema.find("Message").unwrap(), &message).unwrap();
+    let fill_of = |name: &str| {
+        let nc = msg.get("nodeChanges").unwrap().list().iter().find(|nc| nc.get("name").and_then(Kv::str) == Some(name)).unwrap();
+        nc.get("fillPaints").unwrap().list()[0].clone()
+    };
+    let current = fill_of("Current");
+    let written = |paint: &Kv, field: &str| paint.get("paintFilter").and_then(|f| f.get(field)).and_then(Kv::f64);
+    assert!((written(&current, "vibrance").unwrap() + 0.4).abs() < 1e-6);
+    assert!((written(&current, "tint").unwrap() - 1.0).abs() < 1e-6);
+    assert!((written(&current, "shadows").unwrap() - 0.7).abs() < 1e-6);
+    assert!(fill_of("Neutral").get("paintFilter").is_none());
+
+    // The numbers the format uses.
+    let s = Schema::parse(export::SCHEMA).unwrap();
+    let def = |n: &str| s.defs.iter().find(|d| d.name == n).unwrap();
+    let id = |d: &str, f: &str| def(d).fields.iter().find(|x| x.name == f).unwrap().value;
+    assert_eq!(id("Paint", "paintFilter"), 14);
+    assert_eq!(
+        ["tint", "shadows", "highlights", "exposure", "temperature", "vibrance", "contrast"].map(|f| id("PaintFilterMessage", f)),
+        [1, 2, 3, 5, 7, 8, 9]
+    );
+}

docs/file-format-parity.md

@@ -1,6 +1,6 @@
 # File format parity
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-10 · **Change:** minor (`.fig` import and export read and write a boolean group's corner radius and smoothing (#2222); `.jam` import: stickies come in as native board stickies (#1808); `.fig` import scales per-point vector corner radii with the row that supplies their network and keeps different instance scales separate in the network cache (#2097); `.fig` export preserves scaled-instance lengths reset to their unscaled main values, including nested linked-style overrides (#2097); `.fig` import: the layers of an instance scaled with the Scale tool draw at its scale factor, not at their main's lengths (#2091); a color profile per PNG, JPG and WebP export setting (Same as file, sRGB or Display P3), the pixels converted; a `.jam` connector end with an `AUTO` or `CENTER` magnet leaves the side facing the other end, not the side its stale saved point named (#1909); a FigJam elbow connector saved with its path (`connectorControlPoints`) keeps it on import, as a board connector reshaped by hand does, instead of being routed again (#1910); JPG exports take a quality, 1 to 100 with 90 the default, and embed the file's colour profile when it is sRGB too (#2004); a FigJam connector without a saved snapshot took no stroke and was invisible; its line's paint, weight, cap and dashes now come from the file's generated line record (#1807); a Dash cap setting (none, round or square) on Dash and Custom strokes, drawn on both ends of every dash; pasted layers whose image the clipboard lacks are named and show a placeholder that reads as missing (#1646); paint-style colours on layers pasted from another design app keep their style instead of turning black (#1638); imported and pasted text finds an installed family under the other names its fonts give it, and with other case and spacing (#1292); `.fig` export writes colour calculations as the colour they show in each mode and leaves out, with a warning, one that resolves to nothing (#1280); `.fig` import budgets four decoded values per compressed byte instead of one, still within 20M–128M, so dense files within that budget open instead of being refused as having too many values (#574); `.fig` ZIP image reads share a total byte budget and count skipped images in the import warnings (#1076); every file a command reads whole by path is a regular file within a cap that fits it: documents 16 GiB, placed images 256 MiB, CLI scripts 1 GiB; folders, devices and pipes are refused before anything is read (#1114); files nested 256 levels deep import on the browser's 1 MB stack (#1101); SVG and PDF exports count pattern sources and the renders they embed from the layer's depth, so one cap bounds a whole export (#1082); opening a `.figcraft` file unpacks at most 6 GiB in all (2 GiB in the browser), every area together (#1079); `.fig` instance expansion no longer walks variable nodes for every instance or copies every outer override row into each nested instance (#1077); a FigJam `.jam` file opens as a board (#1342); FigJam `.jam` files open like `.fig` files: File ▸ Open, drag and drop, `file.import` and the command line (#1342); SVG import reads `color()` and `color-mix()` colours, with a note and a grey for those it can't (#1550); SVG import draws each pattern tile once per scale, within the layer budget (#1080); a file's JPEG thumbnail can't crash the home screen (#1491's progressive JPEG check, now shared); `.fig` import: library text styles linked by asset key, and override rows restating a nested level (#1234); `.fig` import keeps the file's saved line breaks while the text and its box are unedited (#1236); Download a missing free font from the Missing fonts window (`font.download`, #754); offline Penpot 2.x import/export (#1143); `.sketch` import checked against Sketch's renders: master backgrounds, symbol clipping, tints before Sketch 64, mask opacity, bitmap fills, image overrides on shapes, stretching stacks, blur radii, colour adjustments, OKLab gradients, text growth, shape group borders (#1389); FigJam outer shape outlines and sticky body fallback beside author text (#1341, #1397); image member names are checked on read, and REST image placeholders get archive-safe keys (#1086); Android Vector Drawable (XML) export; `.fig` export: files the incumbent imports, with component set properties, and grid track sizes at its field ids; Save and auto-save don't replace changes another app made to the open file (#1330); `.sketch` import, best effort, Sketch 48 and newer; the PNG row names ignore overlapping layers and where include bounding box is offered; the Fonts table's missing-font row describes the Missing fonts window; `.figcraft` carries the file kind (boards); `.fig` import: resized instances and variable modes by asset key; atomic saves; auto-save; SVG export clip of nested frames; SVG/PDF export depth refusal (#208); `.fig` export: instance sizes, variables with modes, shared styles, variable-width strokes; `.fLine truncated
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-12 · **Change:** minor (`.fig` export writes image adjustments (#2297); `.fig` import and export read and write a boolean group's corner radius and smoothing (#2222); `.jam` import: stickies come in as native board stickies (#1808); `.fig` import scales per-point vector corner radii with the row that supplies their network and keeps different instance scales separate in the network cache (#2097); `.fig` export preserves scaled-instance lengths reset to their unscaled main values, including nested linked-style overrides (#2097); `.fig` import: the layers of an instance scaled with the Scale tool draw at its scale factor, not at their main's lengths (#2091); a color profile per PNG, JPG and WebP export setting (Same as file, sRGB or Display P3), the pixels converted; a `.jam` connector end with an `AUTO` or `CENTER` magnet leaves the side facing the other end, not the side its stale saved point named (#1909); a FigJam elbow connector saved with its path (`connectorControlPoints`) keeps it on import, as a board connector reshaped by hand does, instead of being routed again (#1910); JPG exports take a quality, 1 to 100 with 90 the default, and embed the file's colour profile when it is sRGB too (#2004); a FigJam connector without a saved snapshot took no stroke and was invisible; its line's paint, weight, cap and dashes now come from the file's generated line record (#1807); a Dash cap setting (none, round or square) on Dash and Custom strokes, drawn on both ends of every dash; pasted layers whose image the clipboard lacks are named and show a placeholder that reads as missing (#1646); paint-style colours on layers pasted from another design app keep their style instead of turning black (#1638); imported and pasted text finds an installed family under the other names its fonts give it, and with other case and spacing (#1292); `.fig` export writes colour calculations as the colour they show in each mode and leaves out, with a warning, one that resolves to nothing (#1280); `.fig` import budgets four decoded values per compressed byte instead of one, still within 20M–128M, so dense files within that budget open instead of being refused as having too many values (#574); `.fig` ZIP image reads share a total byte budget and count skipped images in the import warnings (#1076); every file a command reads whole by path is a regular file within a cap that fits it: documents 16 GiB, placed images 256 MiB, CLI scripts 1 GiB; folders, devices and pipes are refused before anything is read (#1114); files nested 256 levels deep import on the browser's 1 MB stack (#1101); SVG and PDF exports count pattern sources and the renders they embed from the layer's depth, so one cap bounds a whole export (#1082); opening a `.figcraft` file unpacks at most 6 GiB in all (2 GiB in the browser), every area together (#1079); `.fig` instance expansion no longer walks variable nodes for every instance or copies every outer override row into each nested instance (#1077); a FigJam `.jam` file opens as a board (#1342); FigJam `.jam` files open like `.fig` files: File ▸ Open, drag and drop, `file.import` and the command line (#1342); SVG import reads `color()` and `color-mix()` colours, with a note and a grey for those it can't (#1550); SVG import draws each pattern tile once per scale, within the layer budget (#1080); a file's JPEG thumbnail can't crash the home screen (#1491's progressive JPEG check, now shared); `.fig` import: library text styles linked by asset key, and override rows restating a nested level (#1234); `.fig` import keeps the file's saved line breaks while the text and its box are unedited (#1236); Download a missing free font from the Missing fonts window (`font.download`, #754); offline Penpot 2.x import/export (#1143); `.sketch` import checked against Sketch's renders: master backgrounds, symbol clipping, tints before Sketch 64, mask opacity, bitmap fills, image overrides on shapes, stretching stacks, blur radii, colour adjustments, OKLab gradients, text growth, shape group borders (#1389); FigJam outer shape outlines and sticky body fallback beside author text (#1341, #1397); image member names are checked on read, and REST image placeholders get archive-safe keys (#1086); Android Vector Drawable (XML) export; `.fig` export: files the incumbent imports, with component set properties, and grid track sizes at its field ids; Save and auto-save don't replace changes another app made to the open file (#1330); `.sketch` import, best effort, Sketch 48 and newer; the PNG row names ignore overlapping layers and where include bounding box is offered; the Fonts table's missing-font row describes the Missing fonts window; `.figcraft` carries the file kind (boards); `.fig` import: resized instances and variable modes by asset key; atomic saves; auto-save; SVG export clip of nested frames; SVG/PDF export depth refusal (#208); `.fig` export: instance sizes, variables with mLine truncated
 
 Every format Figma reads or writes, with FigCraft's support. Sources: `Info.plist` of
 `/Applications/Figma.app` (document types only; nothing inside the bundle's code was read), Figma's
@@ -98,7 +98,7 @@ scales and empty-style clears; they have not been checked in other software.
   stroke outline of plain strokes (a ring around boxes and whole ellipses, the widened path of other
   centred strokes);
   solid, gradient (handles as the paint transform) and image paints (the image bytes, named by their SHA-1, scale mode,
-  rotation, tile scale, crop); strokes (weight, align, join, caps, dashes, miter limit, per-side
+  rotation, tile scale, crop, adjustments: exposure, contrast, saturation (the file's vibrance), temperature, tint, highlights and shadows); strokes (weight, align, join, caps, dashes, miter limit, per-side
   weights); shadows, layer and background blurs (progressive too), noise and texture; corners and
   smoothing, constraints, clip content, masks with their type; auto layout (direction, wrap, gaps, padding,
   alignment, hug, strokes in layout, stacking order, grids with their tracks, their sizes (fixed, hug, fill) and cells) and how
@@ -139,7 +139,7 @@ scales and empty-style clears; they have not been checked in other software.
   guides, prototype device settings, slot properties and slot content, brush
   strokes (written plain), strokes wider on one side of their path (written as filled outlines, or
   with the width on both sides when the shape has a fill too), pattern fills, WebP export settings (written as PNG),
-  image adjustments, glass settings other than frost, springs other than Gentle (written as ease
+  glass settings other than frost, springs other than Gentle (written as ease
   out), set-variable, set-variable-mode and conditional actions, scroll-to offsets, text decoration
   looks, variable font axes, text on a path, nested list levels, list spacing, hanging punctuation,
   leading trim, OpenType features, per-layer operations inside boolean groups, different stroke ends
@@ -196,6 +196,7 @@ scales and empty-style clears; they have not been checked in other software.
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-11-12 | minor | M6, #2297: the `.fig` exporter writes an image paint's adjustments as `paintFilter` (seven fields: exposure, contrast, vibrance from saturation, temperature, tint, highlights, shadows; the tint's sign is flipped, as the importer reads it), and no longer warns about them; the importer already read them. Not checked in other software |
 | 2026-11-10 | minor | M4, #2222: a boolean group's corner radius and smoothing are read and written by the `.fig` importer and exporter, and by the REST importer |
 | 2026-11-07 | patch | Fonts, #2092: a font loaded with `text.loadFont` is the counterpart of a font uploaded to the organization, which Figma's help center ("Manage conflicting fonts") ranks first, ahead of installed fonts and the web fonts. FigCraft chose the first face added for a family and style, so the built-in Inter 4.x kept Regular, SemiBold and Bold after Inter 3.19 was loaded and only Medium refitted. A loaded face now wins over the other faces of its family and style, the latest load over earlier ones; style matching and fallbacks are unchanged, and `refitted` lists the text whose size changes. Installed versus built-in order is not changed here. Test: `fontdb::tests::a_loaded_face_wins_over_the_built_in_one_of_its_family_and_style`. Numbers unchanged. |
 | 2026-11-08 | minor | M6, #2097 follow-up: per-point vector corner radii take the scale of the row supplying `vectorData`, including nested instance rows; override and derived rows are not scaled twice. Network caching distinguishes the instance scale even when resizing gives two vectors the same final box. Synthetic tests cover missing/unit factors, half/double scale, derived size alone, overridden and derived vector data, nested scale and equal-size cache separation. Layer-radius fallback remains the separate #2115 change. Numbers unchanged. |