glyphs2fontir: support translating qcurves to IR paths

glyphs-reader/src/font.rs

@@ -269,6 +269,8 @@ pub enum NodeType {
     OffCurve,
     Curve,
     CurveSmooth,
+    QCurve,
+    QCurveSmooth,
 }
 
 #[derive(Clone, Debug, FromPlist, PartialEq)]
@@ -440,12 +442,16 @@ impl std::str::FromStr for NodeType {
             "OFFCURVE" => Ok(NodeType::OffCurve),
             "CURVE" => Ok(NodeType::Curve),
             "CURVE SMOOTH" => Ok(NodeType::CurveSmooth),
+            "QCURVE" => Ok(NodeType::QCurve),
+            "QCURVE SMOOTH" => Ok(NodeType::QCurveSmooth),
             // Glyphs 3 style
             "l" => Ok(NodeType::Line),
             "ls" => Ok(NodeType::LineSmooth),
             "o" => Ok(NodeType::OffCurve),
             "c" => Ok(NodeType::Curve),
             "cs" => Ok(NodeType::CurveSmooth),
+            "q" => Ok(NodeType::QCurve),
+            "qs" => Ok(NodeType::QCurveSmooth),
             _ => Err(format!("unknown node type {s}")),
         }
     }

glyphs2fontir/src/source.rs

@@ -1348,4 +1348,21 @@ mod tests {
             )
         );
     }
+
+    #[test]
+    fn build_glyph_contour_ir_containing_qcurves() {
+        let glyph_name = "i";
+        let expected = "M302,584 Q328,584 346,602 Q364,620 364,645 Q364,670 346,687.5 Q328,705 302,705 Q276,705 257.5,687.5 Q239,670 239,645 Q239,620 257.5,602 Q276,584 302,584 Z";
+        for test_dir in &[glyphs2_dir(), glyphs3_dir()] {
+            let (source, context) = build_static_metadata(test_dir.join("QCurve.glyphs"));
+            build_glyphs(&source, &context, &[&glyph_name.into()]).unwrap();
+            let glyph = context.glyphs.get(&WorkId::Glyph(glyph_name.into()));
+            let default_instance = glyph
+                .sources()
+                .get(context.static_metadata.get().default_location())
+                .unwrap();
+            let first_contour = default_instance.contours.first().unwrap();
+            assert_eq!(first_contour.to_svg(), expected);
+        }
+    }
 }

glyphs2fontir/src/toir.rs

@@ -85,6 +85,9 @@ fn to_ir_path(glyph_name: GlyphName, src_path: &Path) -> Result<BezPath, WorkErr
             NodeType::OffCurve => path_builder
                 .offcurve((node.pt.x, node.pt.y))
                 .map_err(WorkError::PathConversionError)?,
+            NodeType::QCurve | NodeType::QCurveSmooth => path_builder
+                .qcurve_to((node.pt.x, node.pt.y))
+                .map_err(WorkError::PathConversionError)?,
         }
     }
 

resources/testdata/glyphs2/QCurve.glyphs

@@ -0,0 +1,87 @@
+{
+.appVersion = "3208";
+DisplayStrings = (
+"",
+i
+);
+customParameters = (
+{
+name = "Disable Last Change";
+value = 1;
+}
+);
+date = "2023-07-20 13:49:39 +0000";
+familyName = "New Font";
+fontMaster = (
+{
+alignmentZones = (
+"{800, 16}",
+"{700, 16}",
+"{500, 16}",
+"{0, -16}",
+"{-200, -16}"
+);
+ascender = 800;
+capHeight = 700;
+descender = -200;
+id = m01;
+xHeight = 500;
+}
+);
+glyphs = (
+{
+glyphname = i;
+layers = (
+{
+layerId = m01;
+paths = (
+{
+closed = 1;
+nodes = (
+"328 584 OFFCURVE",
+"364 620 OFFCURVE",
+"364 645 QCURVE SMOOTH",
+"364 670 OFFCURVE",
+"328 705 OFFCURVE",
+"302 705 QCURVE SMOOTH",
+"276 705 OFFCURVE",
+"239 670 OFFCURVE",
+"239 645 QCURVE SMOOTH",
+"239 620 OFFCURVE",
+"276 584 OFFCURVE",
+"302 584 QCURVE SMOOTH"
+);
+},
+{
+closed = 1;
+nodes = (
+"241 0 LINE",
+"354 0 LINE",
+"354 500 LINE",
+"241 500 LINE"
+);
+}
+);
+width = 600;
+}
+);
+unicode = 0069;
+},
+{
+glyphname = space;
+layers = (
+{
+layerId = m01;
+width = 200;
+}
+);
+unicode = 0020;
+}
+);
+unitsPerEm = 1000;
+userData = {
+GSDontShowVersionAlert = 1;
+};
+versionMajor = 1;
+versionMinor = 0;
+}

resources/testdata/glyphs3/QCurve.glyphs

@@ -0,0 +1,121 @@
+{
+.appVersion = "3208";
+.formatVersion = 3;
+DisplayStrings = (
+"",
+i
+);
+customParameters = (
+{
+name = "Write lastChange";
+value = 0;
+}
+);
+date = "2023-07-20 13:49:39 +0000";
+familyName = "New Font";
+fontMaster = (
+{
+id = m01;
+metricValues = (
+{
+over = 16;
+pos = 800;
+},
+{
+over = 16;
+pos = 700;
+},
+{
+over = 16;
+pos = 500;
+},
+{
+over = -16;
+},
+{
+over = -16;
+pos = -200;
+},
+{
+}
+);
+name = Regular;
+}
+);
+glyphs = (
+{
+glyphname = i;
+layers = (
+{
+layerId = m01;
+shapes = (
+{
+closed = 1;
+nodes = (
+(328,584,o),
+(364,620,o),
+(364,645,qs),
+(364,670,o),
+(328,705,o),
+(302,705,qs),
+(276,705,o),
+(239,670,o),
+(239,645,qs),
+(239,620,o),
+(276,584,o),
+(302,584,qs)
+);
+},
+{
+closed = 1;
+nodes = (
+(241,0,l),
+(354,0,l),
+(354,500,l),
+(241,500,l)
+);
+}
+);
+width = 600;
+}
+);
+unicode = 105;
+},
+{
+glyphname = space;
+layers = (
+{
+layerId = m01;
+width = 200;
+}
+);
+unicode = 32;
+}
+);
+metrics = (
+{
+type = ascender;
+},
+{
+type = "cap height";
+},
+{
+type = "x-height";
+},
+{
+type = baseline;
+},
+{
+type = descender;
+},
+{
+type = "italic angle";
+}
+);
+unitsPerEm = 1000;
+userData = {
+GSDontShowVersionAlert = 1;
+};
+versionMajor = 1;
+versionMinor = 0;
+}