fixed linewidth, added linewidth/background to png

pyembroidery/EmbThread.py

@@ -37,7 +37,7 @@ def color_hex(hex_string):
     if size == 6 or size == 8:
         return int(h[:6], 16)
     elif size == 4 or size == 3:
-        return int(h[2] + h[2] + h[1] + h[1] + h[0] + h[0], 16)
+        return int(h[0] + h[0] + h[1] + h[1] + h[2] + h[2], 16)
 
 
 def color_distance_red_mean(

pyembroidery/PngWriter.py

@@ -2,6 +2,7 @@ import struct
 import zlib
 
 from .EmbConstant import *
+from .EmbThread import EmbThread
 
 SEQUIN_CONTINGENCY = CONTINGENCY_SEQUIN_STITCH
 FULL_JUMP = True
@@ -32,6 +33,14 @@ class PngBuffer:
         self.green = 0
         self.blue = 0
         self.alpha = 0
+        self.line_width = 3
+
+    def background(self, red, green, blue, alpha):
+        for i in range(0, len(self.buf), 4):
+            self.buf[i] = red
+            self.buf[i + 1] = green
+            self.buf[i + 2] = blue
+            self.buf[i + 3] = alpha
 
     def plot(self, x, y):
         try:
@@ -86,14 +95,14 @@ class PngBuffer:
                 self.line_for_point(x0, y0, True)
 
     def line_for_point(self, x, y, dy):
-        w = 3
+        w = self.line_width
         left = w >> 1
         right = w - left
         if dy:
-            for pos in range(left, right):
+            for pos in range(-left, right):
                 self.plot(x + pos, y)
         else:
-            for pos in range(left, right):
+            for pos in range(-left, right):
                 self.plot(x, y + pos)
 
 
@@ -103,6 +112,15 @@ def write(pattern, f, settings=None):
     width = int(extends[2] - extends[0])
     height = int(extends[3] - extends[1])
     draw_buff = PngBuffer(width, height)
+    if settings is not None:
+        background = settings.get("background", None)
+        linewidth = settings.get("linewidth", None)
+        if background is not None:
+            b = EmbThread()
+            b.set(background)
+            draw_buff.background(b.get_red(), b.get_green(), b.get_blue(), 0xFF)
+        if linewidth is not None and isinstance(linewidth, int):
+            draw_buff.line_width = linewidth
 
     for stitchblock in pattern.get_as_stitchblock():
         block = stitchblock[0]

pyembroidery/PyEmbroidery.py

@@ -376,11 +376,15 @@ def supported_formats():
         "writer": PmvWriter
     })
     yield ({
-        "description": "PNG image file",
+        "description": "PNG Format, Portable Network Graphics",
         "extension": "png",
         "mimetype": "image/png",
         "category": "image",
-        "writer": PngWriter
+        "writer": PngWriter,
+        "options": {
+            "background": (0x000000, 0xFFFFFF),
+            "linewidth": (1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
+        },
     })
 
 

test/test_writes.py

@@ -13,7 +13,7 @@ class TestWrites(unittest.TestCase):
 
     def test_write_png(self):
         file1 = "file.png"
-        write_png(get_shift_pattern(), file1)
+        write_png(get_shift_pattern(), file1, {"background": "#F00", "linewidth": 5})
         self.addCleanup(os.remove, file1)
 
     def test_write_dst_read_dst(self):