fix #776 swapped bold and italic flags in STYLE entity

NEWS.md

@@ -20,6 +20,8 @@ Version 1.0.0rc1 - dev
 - BUGFIX: [#751](https://github.com/mozman/ezdxf/issues/751)
   fix invalid DXF attribute name
 - BUGFIX: fix configuration defaults for pdsize and pdmode for the `drawing` add-on
+- BUGFIX: [#776](https://github.com/mozman/ezdxf/issues/776)
+  fix swapped bold and italic flag for extended font data in STYLE entity 
 
 Version 0.18.1 - 2022-09-03
 ---------------------------

examples/extended_textstyle_features.py

@@ -0,0 +1,27 @@
+# Copyright (c) 2022, Manfred Moitzi
+# License: MIT License
+
+import pathlib
+import ezdxf
+
+CWD = pathlib.Path("~/Desktop/Outbox").expanduser()
+if not CWD.exists():
+    CWD = pathlib.Path(".")
+
+doc = ezdxf.new()
+doc.styles.add("Arial", font="Arial.ttf")
+text_style = doc.styles.add("ArialItalic", font="Arial.ttf")
+text_style.set_extended_font_data(family='Arial', italic=True, bold=False)
+text_style = doc.styles.add("ArialBold", font="Arial.ttf")
+text_style.set_extended_font_data(family='Arial', italic=False, bold=True)
+text_style = doc.styles.add("ArialItalicBold", font="Arial.ttf")
+text_style.set_extended_font_data(family='Arial', italic=True, bold=True)
+
+msp = doc.modelspace()
+msp.add_text("Arial", dxfattribs={"style": "Arial"}).set_placement((0, 0))
+msp.add_text("Arial Italic", dxfattribs={"style": "ArialItalic"}).set_placement((0, 5))
+msp.add_text("Arial Bold", dxfattribs={"style": "ArialBold"}).set_placement((0, 10))
+msp.add_text("Arial Italic Bold", dxfattribs={"style": "ArialItalicBold"}).set_placement((0, 15))
+
+doc.set_modelspace_vport(25, center=(10, 7.5))
+doc.saveas(CWD / "extended_textstyle_features.dxf")

src/ezdxf/entities/textstyle.py

@@ -89,8 +89,8 @@ class Textstyle(DXFEntity):
 
     DXFTYPE = "STYLE"
     DXFATTRIBS = DXFAttributes(base_class, acdb_symbol_table_record, acdb_style)
-    BOLD = 0b01000000000000000000000000
-    ITALIC = 0b10000000000000000000000000
+    ITALIC = 0b01000000000000000000000000
+    BOLD = 0b10000000000000000000000000
 
     def load_dxf_attribs(
         self, processor: SubclassProcessor = None