full support for emojis

Author: kolibril13

tests/test_svg_images_blender52.py

@@ -8,6 +8,7 @@
 import zlib
 
 import bpy
+from lxml import etree
 import pytest
 
 from typst_importer.image_import import extract_svg_images
@@ -63,6 +64,32 @@ def test_preprocessing_extracts_embedded_use_image_with_viewport_geometry():
     assert max(ys) == pytest.approx(65.0)
 
 
+def test_preprocessing_preserves_visible_overflow_for_typst_image_symbols():
+    data_uri = _data_uri()
+    svg = f'''<svg xmlns="{SVG_NS}" width="100" height="20">
+      <defs><symbol id="emoji" overflow="visible">
+        <image transform="translate(0 -80)" width="100" height="100"
+          preserveAspectRatio="none" href="{data_uri}"/>
+      </symbol></defs>
+      <use href="#emoji" transform="scale(0.2 -0.2)"/>
+    </svg>'''
+
+    processed = preprocess_svg(svg)
+    root = etree.fromstring(processed.encode("utf-8"))
+    image = root.xpath("//*[local-name()='image']")[0]
+    image_viewport = next(
+        ancestor
+        for ancestor in image.iterancestors()
+        if etree.QName(ancestor).localname == "svg" and ancestor is not root
+    )
+
+    # Typst positions the full bitmap outside the symbol's nominal viewport.
+    # The symbol therefore relies on visible overflow; putting this property
+    # only on an outer group clips the emoji to a thin horizontal strip.
+    assert image_viewport.get("overflow") == "visible"
+    assert image.get("href") == data_uri
+
+
 def test_external_images_are_contained_to_the_typst_source_folder(tmp_path: Path):
     source_dir = tmp_path / "source"
     source_dir.mkdir()
@@ -117,8 +144,12 @@ def test_typst_image_becomes_a_packed_textured_plane(tmp_path: Path):
     curves = [obj for obj in collection.objects if obj.type == "CURVE"]
     assert len(curves) == 1
     assert plane.get("svg_paint_index") > curves[0].get("svg_paint_index")
-    assert plane.dimensions.x == pytest.approx(curves[0].dimensions.x, abs=2e-6)
-    assert plane.dimensions.y == pytest.approx(curves[0].dimensions.y, abs=2e-6)
+    # Curve geometry is rescaled in place. Updating the dependency graph keeps
+    # Blender from returning its stale, pre-scale dimensions and ensures this
+    # comparison catches image planes that miss the same import scale.
+    bpy.context.view_layer.update()
+    assert plane.dimensions.x == pytest.approx(curves[0].dimensions.x, rel=1e-3)
+    assert plane.dimensions.y == pytest.approx(curves[0].dimensions.y, rel=1e-3)
     material = plane.data.materials[0]
     texture = next(
         node

typst_importer/svg_preprocessing.py

@@ -315,6 +315,7 @@ def flatten_svg(svg_content):
                         "height",
                         "viewBox",
                         "preserveAspectRatio",
+                        "overflow",
                     }:
                         target_group.set(attr_name, attr_value)
 
@@ -342,6 +343,14 @@ def flatten_svg(svg_content):
                 target_viewport = etree.Element(f"{{{SVG_NS}}}svg")
                 target_viewport.set("width", _number(width))
                 target_viewport.set("height", _number(height))
+                # ``overflow`` belongs to the viewport established when a
+                # <symbol> or nested <svg> is instantiated.  Leaving it on
+                # the surrounding group makes the synthetic viewport use the
+                # SVG default (hidden), which clips Typst's translated emoji
+                # bitmaps down to a thin strip.
+                overflow_value = target.get("overflow")
+                if overflow_value is not None:
+                    target_viewport.set("overflow", overflow_value)
                 viewbox_value = target.get("viewBox")
                 if viewbox_value is not None:
                     target_viewport.set("viewBox", viewbox_value)

typst_importer/typst_to_svg.py

@@ -723,6 +723,7 @@ def typst_to_blender_curves(
             imported_collection,
             use_emission=True,
             warnings=image_warnings,
+            scale_factor=scale_factor,
         )
         if marker_ids:
             finalize_paint_order(