switch to pyembroidery for file generation

lib/output.py

@@ -1,4 +1,4 @@
-import libembroidery
+import pyembroidery
 import inkex
 import simpletransform
 import shapely.geometry as shgeo
@@ -7,15 +7,6 @@ from .utils import Point
 from .svg import PIXELS_PER_MM, get_doc_size, get_viewbox_transform
 
 
-def make_thread(color):
-    thread = libembroidery.EmbThread()
-    thread.color = libembroidery.embColor_make(*color.rgb)
-
-    thread.description = color.name
-    thread.catalogNumber = ""
-
-    return thread
-
 def add_thread(pattern, thread):
     """Add a thread to a pattern and return the thread's index"""
 
@@ -23,20 +14,17 @@ def add_thread(pattern, thread):
 
     return libembroidery.embThreadList_count(pattern.threadList) - 1
 
-def get_flags(stitch):
-    flags = 0
-
+def get_command(stitch):
     if stitch.jump:
-        flags |= libembroidery.JUMP
-
-    if stitch.trim:
-        flags |= libembroidery.TRIM
-
-    if stitch.color_change:
-        flags |= libembroidery.STOP
-
-    return flags
-
+        return pyembroidery.JUMP
+    elif stitch.trim:
+        return pyembroidery.TRIM
+    elif stitch.color_change:
+        return pyembroidery.COLOR_CHANGE
+    elif stitch.stop:
+        return pyembroidery.STOP
+    else:
+        return pyembroidery.NEEDLE_AT
 
 def _string_to_floats(string):
     floats = string.split(',')
@@ -102,27 +90,28 @@ def get_origin(svg):
 def write_embroidery_file(file_path, stitch_plan, svg):
     origin = get_origin(svg)
 
-    pattern = libembroidery.embPattern_create()
+    pattern = pyembroidery.EmbPattern()
 
     for color_block in stitch_plan:
-        add_thread(pattern, make_thread(color_block.color))
+        pattern.add_thread(color_block.color.pyembroidery_thread)
 
         for stitch in color_block:
-            if stitch.stop:
-                # This is the start of the extra color block added by the
-                # "STOP after" handler (see stitch_plan/stop.py).  Assign it
-                # the same color.
-                add_thread(pattern, make_thread(color_block.color))
+            command = get_command(stitch)
+            pattern.add_stitch_absolute(command, stitch.x, stitch.y)
 
-            flags = get_flags(stitch)
-            libembroidery.embPattern_addStitchAbs(pattern, stitch.x - origin.x, stitch.y - origin.y, flags, 1)
-
-    libembroidery.embPattern_addStitchAbs(pattern, stitch.x - origin.x, stitch.y - origin.y, libembroidery.END, 1)
+    pattern.add_stitch_absolute(pyembroidery.END, stitch.x, stitch.y)
 
     # convert from pixels to millimeters
-    libembroidery.embPattern_scale(pattern, 1/PIXELS_PER_MM)
+    # also multiply by 10 to get tenths of a millimeter as required by pyembroidery
+    scale = 10 / PIXELS_PER_MM
 
-    # SVG and embroidery disagree on the direction of the Y axis
-    libembroidery.embPattern_flipVertical(pattern)
+    settings =  {
+                    # correct for the origin
+                    "translate": -origin,
 
-    libembroidery.embPattern_write(pattern, file_path)
+                    # convert from pixels to millimeters
+                    # also multiply by 10 to get tenths of a millimeter as required by pyembroidery
+                    "scale": (scale, scale)
+                }
+
+    pyembroidery.write(pattern, file_path, settings)

lib/threads/color.py

@@ -38,6 +38,15 @@ class ThreadColor(object):
     def to_hex_str(self):
         return "#%s" % self.hex_digits
 
+    @property
+    def pyembroidery_thread(self):
+        return {
+            "name": self.name,
+            "id": self.number,
+            "manufacturer": self.manufacturer,
+            "rgb": int(self.hex_digits, 16),
+        }
+
     @property
     def hex_digits(self):
         return "%02X%02X%02X" % self.rgb

lib/utils/geometry.py

@@ -65,6 +65,9 @@ class Point:
         else:
             raise ValueError("cannot multiply Point by %s" % type(other))
 
+    def __neg__(self):
+        return self * -1
+
     def __rmul__(self, other):
         if isinstance(other, (int, float)):
             return self.__mul__(other)

requirements.txt

@@ -1,4 +1,4 @@
-pyembroidery >=1.2.0, <1.3.0
+pyembroidery >=1.2.12, <1.3.0
 backports.functools_lru_cache
 wxPython
 networkx