io_mesh_uv_layout/export_uv_svg.py

   1 # SPDX-License-Identifier: GPL-2.0-or-later
   2
   3 # <pep8-80 compliant>
   4
   5 import bpy
   6 from os.path import basename
   7 from xml.sax.saxutils import escape
   8
   9 def export(filepath, face_data, colors, width, height, opacity):
  10     with open(filepath, 'w', encoding='utf-8') as file:
  11         for text in get_file_parts(face_data, colors, width, height, opacity):
  12             file.write(text)
  13
  14 def get_file_parts(face_data, colors, width, height, opacity):
  15     yield from header(width, height)
  16     yield from draw_polygons(face_data, width, height, opacity)
  17     yield from footer()
  18
  19 def header(width, height):
  20     yield '<?xml version="1.0" standalone="no"?>\n'
  21     yield '<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" \n'
  22     yield '  "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">\n'
  23     yield f'<svg width="{width}" height="{height}" viewBox="0 0 {width} {height}"\n'
  24     yield '     xmlns="http://www.w3.org/2000/svg" version="1.1">\n'
  25     desc = f"{basename(bpy.data.filepath)}, (Blender {bpy.app.version_string})"
  26     yield f'<desc>{escape(desc)}</desc>\n'
  27
  28 def draw_polygons(face_data, width, height, opacity):
  29     for uvs, color in face_data:
  30         fill = f'fill="{get_color_string(color)}"'
  31
  32         yield '<polygon stroke="black" stroke-width="1"'
  33         yield f' {fill} fill-opacity="{opacity:.2g}"'
  34
  35         yield ' points="'
  36
  37         for uv in uvs:
  38             x, y = uv[0], 1.0 - uv[1]
  39             yield f'{x*width:.3f},{y*height:.3f} '
  40         yield '" />\n'
  41
  42 def get_color_string(color):
  43     r, g, b = color
  44     return f"rgb({round(r*255)}, {round(g*255)}, {round(b*255)})"
  45
  46 def footer():
  47     yield '\n'
  48     yield '</svg>\n'