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Diffstat (limited to 'taep/__init__.py')
| -rw-r--r-- | taep/__init__.py | 327 |
1 files changed, 327 insertions, 0 deletions
diff --git a/taep/__init__.py b/taep/__init__.py new file mode 100644 index 0000000..985705f --- /dev/null +++ b/taep/__init__.py @@ -0,0 +1,327 @@ +#!/usr/bin/env python3 + +import tempfile +import webbrowser +import re +import base64 +import copy +import subprocess +import shlex +import os +import sys +import math +from pathlib import Path + +import click +from bs4 import BeautifulSoup + +from .svg_util import * + + +__version__ = "v1.0.0-rc1" + + +USVG_DPI = 96.0 + +def run_cargo_command(binary, *args, **kwargs): + # By default, try a number of options: + candidates = [ + # somewhere in $PATH + binary, + # wasi-wrapper in $PATH + f'wasi-{binary}', + # in user-local cargo installation + Path.home() / '.cargo' / 'bin' / binary, + # wasi-wrapper in user-local pip installation + Path.home() / '.local' / 'bin' / f'wasi-{binary}', + # next to our current python interpreter (e.g. in virtualenv) + str(Path(sys.executable).parent / f'wasi-{binary}') + ] + + return run_command(binary, *args, candidates=candidates, **kwargs) + + +def run_command(binary, *args, candidates=[], **kwargs): + cmd_args = [] + for key, value in kwargs.items(): + if value is not None: + if value is False: + continue + + if len(key) > 1: + cmd_args.append(f'--{key.replace("_", "-")}') + else: + cmd_args.append(f'-{key}') + + if value is not True: + cmd_args.append(str(value)) + cmd_args.extend(map(str, args)) + + # By default, try a number of options: + if not candidates: + candidates = [binary] + + # if envvar is set, try that first. + if (env_var := os.environ.get(Path(binary).name.replace('-', '_').upper())): + candidates = [str(Path(env_var).expanduser()), *candidates] + + for cand in candidates: + try: + res = subprocess.run([cand, *cmd_args], check=True) + break + except FileNotFoundError: + continue + else: + raise SystemError(f'{binary} executable not found') + + +def simplify_and_open_svg(data): + with tempfile.NamedTemporaryFile('w', suffix='.svg') as tmp_in_svg,\ + tempfile.NamedTemporaryFile('r', suffix='.svg') as tmp_out_svg: + tmp_in_svg.write(data) + tmp_in_svg.flush() + + try: + run_cargo_command('usvg', *shlex.split(os.environ.get('USVG_OPTIONS', '')), tmp_in_svg.name, tmp_out_svg.name) + except SystemError: + 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.') + except subprocess.CalledProcessError as e: + raise click.ClickException(f'usvg exited with return code {e.returncode}.') + + return BeautifulSoup(tmp_out_svg.read(), 'xml') + + +def print_tape(png_file): + try: + run_command('ptouch-print', '--image', png_file) + except SystemError: + 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.') + except subprocess.CalledProcessError as e: + raise click.ClickException(f'ptouch-print exited with return code {e.returncode}.') + + +def calc_scale(soup): + svg = soup.find('svg') + vb_x, vb_y, vb_w, vb_h = map(float, svg['viewBox'].split()) + doc_w, doc_h = float(svg['width']), float(svg['height']) + doc_w_mm = doc_w / USVG_DPI * 25.4 + doc_h_mm = doc_h / USVG_DPI * 25.4 + mm_per_px_x = doc_w_mm / vb_w + mm_per_px_y = doc_h_mm / vb_h + return mm_per_px_x, mm_per_px_y + + +def do_dither(soup, magic_color, dpi, pixel_height): + mm_per_px_x, mm_per_px_y = calc_scale(soup) + + for i, path in enumerate(list(soup.find_all('path'))): + if path.get('stroke').lower() != magic_color: + continue + path_id = path.get('id', '<no id?>') + + commands = list(parse_path_d(path.get('d', ''))) + if len(commands) != 2: + print('Path', path_id, 'has magic color, but has more than two nodes. Ignoring.', file=sys.stderr) + continue + if commands[1][0] != 'L': + print('Path', path_id, 'has magic color, but has a curve. Ignoring.', file=sys.stderr) + continue + if commands[0][0] != 'M': + print('Path', path_id, 'has magic color, but is malformed (does not start with M command). Ignoring.', file=sys.stderr) + continue + (_c1, (x1, y1)), (_c2, (x2, y2)) = commands + + mat = Transform.parse_svg(path.get('transform', '')) + for parent in path.parents: + xf = Transform.parse_svg(parent.get('transform', '')) + mat = xf * mat # make sure we apply the parent transform from the left, i.e. after the child transform + x1, y1 = mat.transform_point(x1, y1) + x2, y2 = mat.transform_point(x2, y2) + path_len = math.dist((x1, y1), (x2, y2)) + 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)) + + if math.isclose(path_len, 0, abs_tol=1e-3): + print('Path', path_id, 'has magic color, but has (almost) zero length. Ignoring.', file=sys.stderr) + continue + + if not (stroke_w := path.get('stroke-width')): + print('Path', path_id, 'has magic color, but has no defined stroke width. Ignoring.', file=sys.stderr) + continue + stroke_w = float(re.match('[-0-9.]+', stroke_w).group(0)) + + path_angle = math.atan2((y2-y1), (x2-x1)) + dx, dy = (x2-x1)/path_len, (y2-y1)/path_len + + sx1, sy1 = mat.transform_point(x1-dy*stroke_w/2, y1+dx*stroke_w/2) + sx2, sy2 = mat.transform_point(x1+dy*stroke_w/2, y1-dx*stroke_w/2) + stroke_w = round(math.dist((sx1, sy1), (sx2, sy2)), 3) + 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) + + out_soup = copy.copy(soup) + + 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})') + #out_soup.find('svg').append(out_soup.new_tag('path', fill='none', stroke='blue', stroke_width=f'24px', + # d=f'M {x1} {y1} L {x2} {y2}')) + xf = Transform.translate(0, stroke_w/2) * Transform.rotate(-path_angle) * Transform.translate(-x1, -y1) + g = out_soup.new_tag('g', id='transform-group', transform=xf.as_svg()) + k = list(out_soup.find('svg').contents) + for c in k: + g.append(c.extract()) + out_soup.find('svg').append(g) + out_soup.find('path', id=path['id']).parent.decompose() + out_soup.find('svg')['viewBox'] = f'0 0 {path_len} {stroke_w}' + out_soup.find('svg')['width'] = f'{path_len_mm}mm' + out_soup.find('svg')['height'] = f'{stroke_w_mm}mm' + + with tempfile.NamedTemporaryFile('w', suffix='.svg') as tmp_svg,\ + tempfile.NamedTemporaryFile('rb', suffix='.png') as tmp_png,\ + tempfile.NamedTemporaryFile('rb', suffix='.png') as tmp_dither: + tmp_svg.write(out_soup.prettify()) + tmp_svg.flush() + run_cargo_command('resvg', tmp_svg.name, tmp_png.name, width=round(Inch(path_len, 'mm')*dpi), height=pixel_height) + + args = shlex.split(os.environ.get('DIDDER_ARGS', 'edm --serpentine FloydSteinberg')) + run_command('didder', *args, palette='black white', i=tmp_png.name, o=tmp_dither.name) + yield (x1, y1, path_angle, stroke_w, path_len), tmp_dither.read() + + +def make_preview(input_svg, out_file, *dither_args, assembly_labels=False, **dither_kwargs): + imgs = [] + labels = [] + soup = simplify_and_open_svg(input_svg) + + for tape_num, ((x1, y1, path_angle, stroke_w, path_len), img) in enumerate(do_dither(soup, *dither_args, **dither_kwargs), start=1): + xf = f'translate({x1} {y1}) rotate({math.degrees(path_angle)}) translate(0 {-stroke_w/2})' + imgs.append(Tag('image', width=path_len, height=stroke_w, preserveAspectRatio='none', + id=f'preview_image_{tape_num}', + x=0, y=0, + transform=xf, + xlink__href=f'data:image/png;base64,{base64.b64encode(img).decode()}')) + labels.append(Tag('path', fill='none', stroke_width='0.2px', stroke='red', transform=xf, + d=f'M 0 0 h {path_len} v {stroke_w} h {-path_len} Z')) + labels.append(Tag('text', fill='red', stroke='none', font_size=f'{stroke_w*0.8}px', transform=xf, + x='2px', y=f'{stroke_w*0.9}px', children=[f'{tape_num}'])) + + layer = Tag('g', inkscape__layer='Preview', inkscape__groupmode='layer', id='layer_preview', children=[ + Tag('g', id='preview_images', children=imgs), + ]) + + if assembly_labels: + layer.children.append(Tag('g', id='assembly_instructions', children=labels)) + + vbx, vby, vbw, vbh = map(float, soup.find('svg')['viewBox'].split()) + bounds = (vbx, vby), (vbx+vbw, vby+vbh) + svg = setup_svg([layer], bounds, inkscape=True) + + if out_file is not None: + out_file.write(str(svg)) + else: + with tempfile.NamedTemporaryFile(suffix='.svg', mode='w', delete=False) as f: + f.write(str(svg)) + f.flush() + webbrowser.open_new_tab(f'file://{f.name}') + + +@click.group() +def cli(): + pass + +@cli.command() +@click.option('--num-rows', type=int, default=5, help='Number of tapes') +@click.option('--tape-width', type=float, default=24, help='Width of tape') +@click.option('--tape-border', type=float, default=3, help='Width of empty border at the edges of the tape in mm') +@click.option('--tape-spacing', type=float, default=2, help='Space between tapes') +@click.option('--tape-length', type=float, default=250, help='Length of tape segments') +@click.option('--magic-color', type=str, default='#cc0301', help='SVG color of tape') +@click.argument('output_svg', type=click.File(mode='w'), default='-') +def template(num_rows, tape_width, tape_border, tape_spacing, tape_length, magic_color, output_svg): + pitch = tape_width + tape_spacing + tags = [Tag('g', inkscape__layer='Layer 1', inkscape__groupmode='layer', id='layer1', children=[ + Tag('g', id='g1', children=[ + Tag('g', id=f'tape{i}', children=[ + Tag('path', id=f'tape{i}_outline', fill='none', stroke='black', opacity='0.3', stroke_width=f'{tape_width}px', + d=f'M 0 {tape_width/2 + i*pitch} {tape_length} {tape_width/2 + i*pitch}'), + Tag('path', id=f'tape{i}_printable_area', fill='none', stroke=magic_color, stroke_width=f'{tape_width-2*tape_border}px', + d=f'M 0 {tape_width/2 + i*pitch} {tape_length} {tape_width/2 + i*pitch}'), + ]) + for i in range(num_rows) + ]) + ])] + + bounds = (0, 0), (tape_length, num_rows*tape_width + (num_rows-1)*tape_spacing) + svg = setup_svg(tags, bounds, margin=tape_width, inkscape=True) + output_svg.write(str(svg)) + + +@cli.command('print') +@click.option('--magic-color', type=str, default='#cc0301', help='SVG color of tape') +@click.option('--dpi', type=float, default=180, help='Printer bitmap resolution in DPI') +@click.option('--pixel-height', type=int, default=127, help='Printer tape vertical pixel height') +@click.option('--confirm/--no-confirm', default=True, help='Ask for confirmation before printing each tape') +@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.') +@click.argument('input_svg', type=click.File(mode='r'), default='-') +def cli_print(input_svg, tape, magic_color, dpi, pixel_height, confirm): + with tempfile.TemporaryDirectory() as tmpdir: + out = {} + + soup = simplify_and_open_svg(input_svg.read()) + for i, (_tape_pos, img) in enumerate(do_dither(soup, magic_color=magic_color, dpi=dpi, pixel_height=pixel_height), start=1): + f = Path(tmpdir) / f'dither_tape_{i}.png' + f.write_bytes(img) + out[i] = f + + selected = set() + for entry in tape.split(','): + start, sep, stop = entry.partition('-') + if not sep: + selected.add(int(start)) + else: + start = int(start) if start else min(out) + stop = int(stop) if stop else max(out) + selected |= set(range(start, stop+1)) + + for tape in sorted(selected): + if confirm: + if not click.confirm(f'Do you want to continue and print tape {tape}?'): + break + print_tape(out[tape]) + + +@cli.command() +@click.option('--magic-color', type=str, default='#cc0301', help='SVG color of tape') +@click.option('--dpi', type=float, default=180, help='Printer bitmap resolution in DPI') +@click.option('--pixel-height', type=int, default=127, help='Printer tape vertical pixel height') +@click.argument('input_svg', type=click.File(mode='r'), default='-') +@click.argument('output_svg', type=click.File(mode='w'), required=False) +def preview(input_svg, output_svg, magic_color, dpi, pixel_height): + make_preview(input_svg.read(), output_svg, magic_color=magic_color, dpi=dpi, pixel_height=pixel_height, assembly_labels=False) + + +@cli.command() +@click.option('--magic-color', type=str, default='#cc0301', help='SVG color of tape') +@click.option('--dpi', type=float, default=180, help='Printer bitmap resolution in DPI') +@click.option('--pixel-height', type=int, default=127, help='Printer tape vertical pixel height') +@click.argument('input_svg', type=click.File(mode='r'), default='-') +@click.argument('output_svg', type=click.File(mode='w'), required=False) +def assembly(input_svg, output_svg, magic_color, dpi, pixel_height): + make_preview(input_svg.read(), output_svg, magic_color=magic_color, dpi=dpi, pixel_height=pixel_height, assembly_labels=True) + + +@cli.command() +@click.option('--magic-color', type=str, default='#cc0301', help='SVG color of tape') +@click.option('--dpi', type=float, default=180, help='Printer bitmap resolution in DPI') +@click.option('--pixel-height', type=int, default=127, help='Printer tape vertical pixel height') +@click.argument('input_svg', type=click.File(mode='r'), default='-') +@click.argument('output_dir', type=click.Path(file_okay=False, dir_okay=True, path_type=Path)) +def dither(input_svg, output_dir, magic_color, dpi, pixel_height): + output_dir.mkdir(exist_ok=True) + soup = simplify_and_open_svg(input_svg.read()) + for i, (_tape_pos, img) in enumerate(do_dither(soup, magic_color=magic_color, dpi=dpi, pixel_height=pixel_height), start=1): + outfile = output_dir / f'dither_tape_{i}.png' + outfile.write_bytes(img) + print(f'Wrote {outfile}') + + +if __name__ == '__main__': + cli() + |