327 lines
15 KiB
Python
327 lines
15 KiB
Python
#!/usr/bin/env python3
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import tempfile
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import webbrowser
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import re
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import base64
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import copy
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import subprocess
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import shlex
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import os
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import sys
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import math
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from pathlib import Path
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import click
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from bs4 import BeautifulSoup
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from .svg_util import *
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__version__ = "v1.0.0-rc2"
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USVG_DPI = 96.0
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def run_cargo_command(binary, *args, **kwargs):
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# By default, try a number of options:
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candidates = [
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# somewhere in $PATH
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binary,
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# wasi-wrapper in $PATH
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f'wasi-{binary}',
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# in user-local cargo installation
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Path.home() / '.cargo' / 'bin' / binary,
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# wasi-wrapper in user-local pip installation
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Path.home() / '.local' / 'bin' / f'wasi-{binary}',
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# next to our current python interpreter (e.g. in virtualenv)
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str(Path(sys.executable).parent / f'wasi-{binary}')
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]
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return run_command(binary, *args, candidates=candidates, **kwargs)
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def run_command(binary, *args, candidates=[], **kwargs):
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cmd_args = []
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for key, value in kwargs.items():
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if value is not None:
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if value is False:
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continue
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if len(key) > 1:
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cmd_args.append(f'--{key.replace("_", "-")}')
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else:
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cmd_args.append(f'-{key}')
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if value is not True:
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cmd_args.append(str(value))
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cmd_args.extend(map(str, args))
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# By default, try a number of options:
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if not candidates:
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candidates = [binary]
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# if envvar is set, try that first.
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if (env_var := os.environ.get(Path(binary).name.replace('-', '_').upper())):
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candidates = [str(Path(env_var).expanduser()), *candidates]
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for cand in candidates:
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try:
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res = subprocess.run([cand, *cmd_args], check=True)
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break
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except FileNotFoundError:
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continue
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else:
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raise SystemError(f'{binary} executable not found')
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def simplify_and_open_svg(data):
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with tempfile.NamedTemporaryFile('w', suffix='.svg') as tmp_in_svg,\
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tempfile.NamedTemporaryFile('r', suffix='.svg') as tmp_out_svg:
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tmp_in_svg.write(data)
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tmp_in_svg.flush()
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try:
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run_cargo_command('usvg', *shlex.split(os.environ.get('USVG_OPTIONS', '')), tmp_in_svg.name, tmp_out_svg.name)
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except SystemError:
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raise click.ClickException('Cannot find usvg. Please install usvg using cargo, or pass the full path to the usvg binary in the USVG environment variable.')
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except subprocess.CalledProcessError as e:
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raise click.ClickException(f'usvg exited with return code {e.returncode}.')
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return BeautifulSoup(tmp_out_svg.read(), 'xml')
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def print_tape(png_file):
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try:
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run_command('ptouch-print', '--image', png_file)
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except SystemError:
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raise click.ClickException('Cannot find ptouch-print. Please install ptouch-print from the upstream repo at https://git.familie-radermacher.ch/linux/ptouch-print.git . You can pass the full path to the ptouch-print binary in the PTOUCH_PRINT environment variable if it\'s not in $PATH.')
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except subprocess.CalledProcessError as e:
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raise click.ClickException(f'ptouch-print exited with return code {e.returncode}.')
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def calc_scale(soup):
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svg = soup.find('svg')
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vb_x, vb_y, vb_w, vb_h = map(float, svg['viewBox'].split())
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doc_w, doc_h = float(svg['width']), float(svg['height'])
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doc_w_mm = doc_w / USVG_DPI * 25.4
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doc_h_mm = doc_h / USVG_DPI * 25.4
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mm_per_px_x = doc_w_mm / vb_w
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mm_per_px_y = doc_h_mm / vb_h
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return mm_per_px_x, mm_per_px_y
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def do_dither(soup, magic_color, dpi, pixel_height):
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mm_per_px_x, mm_per_px_y = calc_scale(soup)
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for i, path in enumerate(list(soup.find_all('path'))):
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if path.get('stroke').lower() != magic_color:
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continue
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path_id = path.get('id', '<no id?>')
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commands = list(parse_path_d(path.get('d', '')))
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if len(commands) != 2:
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print('Path', path_id, 'has magic color, but has more than two nodes. Ignoring.', file=sys.stderr)
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continue
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if commands[1][0] != 'L':
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print('Path', path_id, 'has magic color, but has a curve. Ignoring.', file=sys.stderr)
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continue
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if commands[0][0] != 'M':
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print('Path', path_id, 'has magic color, but is malformed (does not start with M command). Ignoring.', file=sys.stderr)
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continue
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(_c1, (x1, y1)), (_c2, (x2, y2)) = commands
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mat = Transform.parse_svg(path.get('transform', ''))
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for parent in path.parents:
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xf = Transform.parse_svg(parent.get('transform', ''))
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mat = xf * mat # make sure we apply the parent transform from the left, i.e. after the child transform
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x1, y1 = mat.transform_point(x1, y1)
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x2, y2 = mat.transform_point(x2, y2)
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path_len = math.dist((x1, y1), (x2, y2))
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path_len_mm = math.dist((x1*mm_per_px_x, y1*mm_per_px_y), (x2*mm_per_px_x, y2*mm_per_px_y))
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if math.isclose(path_len, 0, abs_tol=1e-3):
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print('Path', path_id, 'has magic color, but has (almost) zero length. Ignoring.', file=sys.stderr)
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continue
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if not (stroke_w := path.get('stroke-width')):
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print('Path', path_id, 'has magic color, but has no defined stroke width. Ignoring.', file=sys.stderr)
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continue
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stroke_w = float(re.match('[-0-9.]+', stroke_w).group(0))
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path_angle = math.atan2((y2-y1), (x2-x1))
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dx, dy = (x2-x1)/path_len, (y2-y1)/path_len
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sx1, sy1 = mat.transform_point(x1-dy*stroke_w/2, y1+dx*stroke_w/2)
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sx2, sy2 = mat.transform_point(x1+dy*stroke_w/2, y1-dx*stroke_w/2)
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stroke_w = round(math.dist((sx1, sy1), (sx2, sy2)), 3)
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stroke_w_mm = round(math.dist((sx1*mm_per_px_x, sy1*mm_per_px_y), (sx2*mm_per_px_x, sy2*mm_per_px_y)), 3)
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out_soup = copy.copy(soup)
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print(f'Identified tape from path "{path_id}", length {path_len_mm:2f} mm, angle {math.degrees(path_angle):.1f} deg with physical stroke width {stroke_w_mm:.2f} mm from ({x1:.2f}, {y1:.2f}) to ({x2:.2f}, {y2:.2f})')
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#out_soup.find('svg').append(out_soup.new_tag('path', fill='none', stroke='blue', stroke_width=f'24px',
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# d=f'M {x1} {y1} L {x2} {y2}'))
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xf = Transform.translate(0, stroke_w/2) * Transform.rotate(-path_angle) * Transform.translate(-x1, -y1)
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g = out_soup.new_tag('g', id='transform-group', transform=xf.as_svg())
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k = list(out_soup.find('svg').contents)
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for c in k:
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g.append(c.extract())
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out_soup.find('svg').append(g)
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out_soup.find('path', id=path['id']).parent.decompose()
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out_soup.find('svg')['viewBox'] = f'0 0 {path_len} {stroke_w}'
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out_soup.find('svg')['width'] = f'{path_len_mm}mm'
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out_soup.find('svg')['height'] = f'{stroke_w_mm}mm'
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with tempfile.NamedTemporaryFile('w', suffix='.svg') as tmp_svg,\
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tempfile.NamedTemporaryFile('rb', suffix='.png') as tmp_png,\
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tempfile.NamedTemporaryFile('rb', suffix='.png') as tmp_dither:
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tmp_svg.write(out_soup.prettify())
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tmp_svg.flush()
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run_cargo_command('resvg', tmp_svg.name, tmp_png.name, width=round(Inch(path_len, 'mm')*dpi), height=pixel_height)
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args = shlex.split(os.environ.get('DIDDER_ARGS', 'edm --serpentine FloydSteinberg'))
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run_command('didder', *args, palette='black white', i=tmp_png.name, o=tmp_dither.name)
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yield (x1, y1, path_angle, stroke_w, path_len), tmp_dither.read()
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def make_preview(input_svg, out_file, *dither_args, assembly_labels=False, **dither_kwargs):
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imgs = []
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labels = []
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soup = simplify_and_open_svg(input_svg)
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for tape_num, ((x1, y1, path_angle, stroke_w, path_len), img) in enumerate(do_dither(soup, *dither_args, **dither_kwargs), start=1):
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xf = f'translate({x1} {y1}) rotate({math.degrees(path_angle)}) translate(0 {-stroke_w/2})'
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imgs.append(Tag('image', width=path_len, height=stroke_w, preserveAspectRatio='none',
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id=f'preview_image_{tape_num}',
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x=0, y=0,
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transform=xf,
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xlink__href=f'data:image/png;base64,{base64.b64encode(img).decode()}'))
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labels.append(Tag('path', fill='none', stroke_width='0.2px', stroke='red', transform=xf,
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d=f'M 0 0 h {path_len} v {stroke_w} h {-path_len} Z'))
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labels.append(Tag('text', fill='red', stroke='none', font_size=f'{stroke_w*0.8}px', transform=xf,
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x='2px', y=f'{stroke_w*0.9}px', children=[f'{tape_num}']))
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layer = Tag('g', inkscape__layer='Preview', inkscape__groupmode='layer', id='layer_preview', children=[
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Tag('g', id='preview_images', children=imgs),
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])
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if assembly_labels:
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layer.children.append(Tag('g', id='assembly_instructions', children=labels))
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vbx, vby, vbw, vbh = map(float, soup.find('svg')['viewBox'].split())
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bounds = (vbx, vby), (vbx+vbw, vby+vbh)
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svg = setup_svg([layer], bounds, inkscape=True)
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if out_file is not None:
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out_file.write(str(svg))
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else:
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with tempfile.NamedTemporaryFile(suffix='.svg', mode='w', delete=False) as f:
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f.write(str(svg))
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f.flush()
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webbrowser.open_new_tab(f'file://{f.name}')
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@click.group()
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def cli():
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pass
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@cli.command()
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@click.option('--num-rows', type=int, default=5, help='Number of tapes')
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@click.option('--tape-width', type=float, default=24, help='Width of tape')
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@click.option('--tape-border', type=float, default=3, help='Width of empty border at the edges of the tape in mm')
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@click.option('--tape-spacing', type=float, default=2, help='Space between tapes')
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@click.option('--tape-length', type=float, default=250, help='Length of tape segments')
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@click.option('--magic-color', type=str, default='#cc0301', help='SVG color of tape')
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@click.argument('output_svg', type=click.File(mode='w'), default='-')
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def template(num_rows, tape_width, tape_border, tape_spacing, tape_length, magic_color, output_svg):
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pitch = tape_width + tape_spacing
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tags = [Tag('g', inkscape__layer='Layer 1', inkscape__groupmode='layer', id='layer1', children=[
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Tag('g', id='g1', children=[
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Tag('g', id=f'tape{i}', children=[
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Tag('path', id=f'tape{i}_outline', fill='none', stroke='black', opacity='0.3', stroke_width=f'{tape_width}px',
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d=f'M 0 {tape_width/2 + i*pitch} {tape_length} {tape_width/2 + i*pitch}'),
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Tag('path', id=f'tape{i}_printable_area', fill='none', stroke=magic_color, stroke_width=f'{tape_width-2*tape_border}px',
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d=f'M 0 {tape_width/2 + i*pitch} {tape_length} {tape_width/2 + i*pitch}'),
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])
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for i in range(num_rows)
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])
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])]
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bounds = (0, 0), (tape_length, num_rows*tape_width + (num_rows-1)*tape_spacing)
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svg = setup_svg(tags, bounds, margin=tape_width, inkscape=True)
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output_svg.write(str(svg))
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@cli.command('print')
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@click.option('--magic-color', type=str, default='#cc0301', help='SVG color of tape')
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@click.option('--dpi', type=float, default=180, help='Printer bitmap resolution in DPI')
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@click.option('--pixel-height', type=int, default=127, help='Printer tape vertical pixel height')
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@click.option('--confirm/--no-confirm', default=True, help='Ask for confirmation before printing each tape')
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@click.option('--tape', type=str, default='-', help='The index numbers of which tapes to print. Comma-separate list, each entry is either a single number or a "3-5" style range where both ends are included.')
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@click.argument('input_svg', type=click.File(mode='r'), default='-')
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def cli_print(input_svg, tape, magic_color, dpi, pixel_height, confirm):
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with tempfile.TemporaryDirectory() as tmpdir:
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out = {}
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soup = simplify_and_open_svg(input_svg.read())
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for i, (_tape_pos, img) in enumerate(do_dither(soup, magic_color=magic_color, dpi=dpi, pixel_height=pixel_height), start=1):
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f = Path(tmpdir) / f'dither_tape_{i}.png'
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f.write_bytes(img)
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out[i] = f
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selected = set()
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for entry in tape.split(','):
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start, sep, stop = entry.partition('-')
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if not sep:
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selected.add(int(start))
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else:
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start = int(start) if start else min(out)
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stop = int(stop) if stop else max(out)
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selected |= set(range(start, stop+1))
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for tape in sorted(selected):
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if confirm:
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if not click.confirm(f'Do you want to continue and print tape {tape}?'):
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break
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print_tape(out[tape])
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@cli.command()
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@click.option('--magic-color', type=str, default='#cc0301', help='SVG color of tape')
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@click.option('--dpi', type=float, default=180, help='Printer bitmap resolution in DPI')
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@click.option('--pixel-height', type=int, default=127, help='Printer tape vertical pixel height')
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@click.argument('input_svg', type=click.File(mode='r'), default='-')
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@click.argument('output_svg', type=click.File(mode='w'), required=False)
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def preview(input_svg, output_svg, magic_color, dpi, pixel_height):
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make_preview(input_svg.read(), output_svg, magic_color=magic_color, dpi=dpi, pixel_height=pixel_height, assembly_labels=False)
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@cli.command()
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@click.option('--magic-color', type=str, default='#cc0301', help='SVG color of tape')
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@click.option('--dpi', type=float, default=180, help='Printer bitmap resolution in DPI')
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@click.option('--pixel-height', type=int, default=127, help='Printer tape vertical pixel height')
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@click.argument('input_svg', type=click.File(mode='r'), default='-')
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@click.argument('output_svg', type=click.File(mode='w'), required=False)
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def assembly(input_svg, output_svg, magic_color, dpi, pixel_height):
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make_preview(input_svg.read(), output_svg, magic_color=magic_color, dpi=dpi, pixel_height=pixel_height, assembly_labels=True)
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@cli.command()
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@click.option('--magic-color', type=str, default='#cc0301', help='SVG color of tape')
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@click.option('--dpi', type=float, default=180, help='Printer bitmap resolution in DPI')
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@click.option('--pixel-height', type=int, default=127, help='Printer tape vertical pixel height')
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@click.argument('input_svg', type=click.File(mode='r'), default='-')
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@click.argument('output_dir', type=click.Path(file_okay=False, dir_okay=True, path_type=Path))
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def dither(input_svg, output_dir, magic_color, dpi, pixel_height):
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output_dir.mkdir(exist_ok=True)
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soup = simplify_and_open_svg(input_svg.read())
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for i, (_tape_pos, img) in enumerate(do_dither(soup, magic_color=magic_color, dpi=dpi, pixel_height=pixel_height), start=1):
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outfile = output_dir / f'dither_tape_{i}.png'
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outfile.write_bytes(img)
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print(f'Wrote {outfile}')
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if __name__ == '__main__':
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cli()
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