export hpgl load from folder

text_to_hpgl.py

@@ -33,36 +33,13 @@ def _flatten_cubic(p0, p1, p2, p3, n=10):
         yield (x, y)
 
 
-def text_to_hpgl(text, font_path, size_pt=72, units_per_pt=14):
-    """
-    Convert text to HPGL string using the given font file.
-    size_pt: font size in points.
-    units_per_pt: HPGL units per point (default ~0.35 mm per pt).
-    Returns HPGL string (IN;SP1;PU x,y;PD;PA x,y;...).
-    """
-    try:
-        from matplotlib.textpath import TextPath
-        from matplotlib.font_manager import FontProperties
-    except ImportError:
-        raise RuntimeError('matplotlib is required for text-to-HPGL. Install with: pip install matplotlib')
-
-    if not text or not font_path or not os.path.isfile(font_path):
-        raise ValueError('Need non-empty text and a valid font file path.')
-
-    prop = FontProperties(fname=font_path)
-    path = TextPath((0, 0), text, size=size_pt, prop=prop)
-    vertices = path.vertices
-    codes = path.codes
-
+def _path_to_segments(vertices, codes, scale):
+    """Convert a single path (vertices, codes) to list of (PU/PD, x, y) in HPGL units."""
     if codes is None:
         codes = [MOVETO] + [LINETO] * (len(vertices) - 1)
-
-    # Scale to HPGL units (y flip: matplotlib y up, HPGL typically y up too; we keep same)
-    scale = units_per_pt
     segments = []
     i = 0
     contour_start = None
-
     while i < len(codes):
         code = codes[i]
         if code == MOVETO:
@@ -94,9 +71,44 @@ def text_to_hpgl(text, font_path, size_pt=72, units_per_pt=14):
             i += 3
         else:
             i += 1
+    return segments
+
+
+def text_to_hpgl(text, font_path, size_pt=72, units_per_pt=14):
+    """
+    Convert text to HPGL string using the given font file.
+    Newlines in text start a new line (stacked vertically).
+    size_pt: font size in points.
+    units_per_pt: HPGL units per point (default ~0.35 mm per pt).
+    Returns HPGL string (IN;SP1;PU x,y;PD;PA x,y;...).
+    """
+    try:
+        from matplotlib.textpath import TextPath
+        from matplotlib.font_manager import FontProperties
+    except ImportError:
+        raise RuntimeError('matplotlib is required for text-to-HPGL. Install with: pip install matplotlib')
+
+    if not text or not font_path or not os.path.isfile(font_path):
+        raise ValueError('Need non-empty text and a valid font file path.')
+
+    # Normalize line endings and split into lines
+    lines = text.replace('\r\n', '\n').replace('\r', '\n').split('\n')
+    scale = units_per_pt
+    line_height_pt = size_pt * 1.2  # line spacing
+    prop = FontProperties(fname=font_path)
+    all_segments = []
+
+    for line_index, line in enumerate(lines):
+        if not line.strip():
+            continue
+        # Each line at its own Y: first line at 0, next at -line_height_pt, etc. (y down)
+        path = TextPath((0, -line_index * line_height_pt), line, size=size_pt, prop=prop)
+        vertices = path.vertices
+        codes = path.codes
+        all_segments.extend(_path_to_segments(vertices, codes, scale))
 
     out = ['IN', 'SP1']
-    for seg in segments:
+    for seg in all_segments:
         if seg[0] == 'PU':
             out.append('PU{},{}'.format(seg[1], seg[2]))
         else: