564 lines
23 KiB
Python
Executable file
564 lines
23 KiB
Python
Executable file
import tempfile
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import os.path as path
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from pathlib import Path
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import textwrap
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import subprocess
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import functools
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import os
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import base64
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import re
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import sys
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import warnings
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import shutil
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from zipfile import ZipFile, is_zipfile
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from lxml import etree
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import numpy as np
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import click
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import gerbonara as gn
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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.argument('input_gerbers', type=click.Path(exists=True, path_type=Path))
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@click.argument('input_svg', type=click.Path(exists=True, dir_okay=False, file_okay=True, allow_dash=True, path_type=Path))
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@click.argument('output_gerbers', type=click.Path(allow_dash=True, path_type=Path))
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@click.option('--dilate', default=0.1, type=float, help='Default dilation for subtraction operations in mm')
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@click.option('--zip/--no-zip', 'is_zip', default=None, help='zip output files. Default: zip if output path ends with ".zip" or when outputting to stdout.')
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@click.option('--curve-tolerance', type=float, help='Tolerance for curve flattening in mm')
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@click.option('--no-subtract', 'no_subtract', flag_value=True, help='Disable subtraction')
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@click.option('--subtract', help='Use user subtraction script from argument')
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@click.option('--trace-space', type=float, default=0.1, help='passed through to svg-flatten')
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@click.option('--vectorizer', help='passed through to svg-flatten')
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@click.option('--vectorizer-map', help='passed through to svg-flatten')
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@click.option('--preserve-aspect-ratio', help='PNG/JPG files only: passed through to svg-flatten')
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@click.option('--exclude-groups', help='passed through to svg-flatten')
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def paste(input_gerbers, input_svg, output_gerbers, is_zip,
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dilate, curve_tolerance, no_subtract, subtract,
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preserve_aspect_ratio,
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trace_space, vectorizer, vectorizer_map, exclude_groups):
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""" Render vector data and raster images from SVG file into gerbers. """
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subtract_map = parse_subtract_script('' if no_subtract else subtract, dilate)
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stack = gn.LayerStack.open(input_gerbers, lazy=True)
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(bb_min_x, bb_min_y), (bb_max_x, bb_max_y) = bounds = stack.board_bounds()
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output_is_zip = output_gerbers.lower().endswith('.zip') if is_zip is None else is_zip
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# Create output dir if it does not exist yet. Do this now so we fail early
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if not output_is_zip:
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output_gerbers.mkdir(exist_ok=True)
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@functools.lru_cache()
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def do_dilate(layer, amount):
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return dilate_gerber(layer, bounds, amount, curve_tolerance)
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for (side, use), layer in stack.graphic_layers.items():
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overlay_grb = svg_to_gerber(input_svg,
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trace_space=trace_space, vectorizer=vectorizer, vectorizer_map=vectorizer_map,
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exclude_groups=exclude_groups, curve_tolerance=curve_tolerance,
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preserve_aspect_ratio=preserve_aspect_ratio,
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outline_mode=(use == 'outline'),
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only_groups=f'g-{side}-{use}')
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if not overlay_grb:
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print(f'Overlay {side} {use} layer is empty. Skipping.')
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continue
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# only open lazily loaded layer if we need it. Replace lazy wrapper in stack with loaded layer.
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stack.graphic_layers[(side, use)] = layer = layer.instance
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# move overlay from svg origin to gerber origin
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overlay_grb.offset(bb_min_x, bb_min_y)
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# dilated subtract layers on top of overlay
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if side in ('top', 'bottom'): # do not process subtraction scripts for inner layers
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dilations = subtract_map.get(use, [])
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for d_layer, amount in dilations:
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dilated = do_dilate(stack[(side, d_layer)], amount)
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layer.merge(dilated, mode='below', keep_settings=True)
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# overlay on bottom
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layer.merge(overlay_grb, mode='below', keep_settings=True)
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if output_is_zip:
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stack.save_to_zipfile(output_gerbers)
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else:
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stack.save_to_directory(output_gerbers)
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@cli.command()
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@click.argument('input_gerbers', type=click.Path(exists=True))
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@click.argument('output_svg', required=False)
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@click.option('-t' ,'--top', help='Render board top side.', is_flag=True)
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@click.option('-b' ,'--bottom', help='Render board bottom side.', is_flag=True)
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@click.option('-f' ,'--force', help='Overwrite existing output file when autogenerating file name.', is_flag=True)
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@click.option('--vector/--raster', help='Embed preview renders into output file as SVG vector graphics instead of rendering them to PNG bitmaps. The resulting preview may slow down your SVG editor.')
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@click.option('--raster-dpi', type=float, default=300.0, help='DPI for rastering preview')
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def template(input_gerbers, output_svg, top, bottom, force, vector, raster_dpi):
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''' Generate SVG template for gerbolyze paste from gerber files.
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INPUT may be a gerber file, directory of gerber files or zip file with gerber files
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'''
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source = Path(input_gerbers)
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ttype = 'top' if top else 'bottom'
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if (bool(top) + bool(bottom)) != 1:
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raise click.UsageError('Excactly one of --top or --bottom must be given.')
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if output_svg is None:
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# autogenerate output file name if none is given:
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# /path/to/gerber/dir -> /path/to/gerber/dir.preview-{top|bottom}.svg
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# /path/to/gerbers.zip -> /path/to/gerbers.zip.preview-{top|bottom}.svg
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# /path/to/single/file.grb -> /path/to/single/file.grb.preview-{top|bottom}.svg
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output_svg = source.parent / f'{source.name}.template-{ttype}.svg'
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click.echo(f'Writing output to {output_svg}')
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if output_svg.exists() and not force:
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raise UsageError(f'Autogenerated output file already exists. Please remote first, or use --force, or '
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'explicitly give an output path.')
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else:
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output_svg = Path(output_svg)
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stack = gn.LayerStack.open(source, lazy=True)
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svg = stack.to_pretty_svg(side=('top' if top else 'bottom'), inkscape=True)
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template_layers = [ f'{ttype}-{use}' for use in [ 'copper', 'mask', 'silk' ] ] + ['mechanical outline']
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silk = template_layers[-2]
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if vector:
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output_svg.write_text(create_template_from_svg(svg, template_layers, current_layer=silk))
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else:
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with tempfile.NamedTemporaryFile(suffix='.svg') as temp_svg, \
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tempfile.NamedTemporaryFile(suffix='.png') as temp_png:
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Path(temp_svg.name).write_text(str(svg))
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run_resvg(temp_svg.name, temp_png.name, dpi=f'{raster_dpi:.0f}')
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output_svg.write_text(template_svg_for_png(stack.board_bounds(), Path(temp_png.name).read_bytes(),
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template_layers, current_layer=silk))
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class ClickSizeParam(click.ParamType):
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name = 'Size'
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def convert(self, value, param, ctx):
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if isinstance(value, tuple):
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return value
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if not (m := re.match('([0-9]+\.?[0-9]*)(mm|cm|in)?[xX*/,×]([0-9]+\.?[0-9]*)(mm|cm|in)?', value)):
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self.fail('Size must have format [width]x[height][unit]. The unit can be mm, cm or in. The unit is optional and defaults to mm.', param=param, ctx=ctx)
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w, unit1, h, unit2 = m.groups()
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if unit1 and unit2 and unit1 != unit2:
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self.fail('Width and height must use the same unit. Two different units given for width and height: width is in {unit1}, and height is in {unit2}.', param=param, ctx=ctx)
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unit = (unit1 or unit2) or 'mm'
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return float(w), float(h), unit
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@cli.command()
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@click.argument('output_svg', type=click.Path(dir_okay=False, writable=True, allow_dash=True))
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@click.option('--size', type=ClickSizeParam(), default='100x100mm', help='PCB size in [width]x[height][unit] format. Units can be cm, mm or in, when no unit is given, defaults to mm. When no size is given, defaults to 100x100mm.')
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@click.option('--force', is_flag=True, help='Overwrite output file without asking if it exists.')
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@click.option('-n', '--copper-layers', default=2, type=int, help='Number of copper layers to generate.')
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@click.option('--no-default-layers', is_flag=True, help='Do not generate default layers.')
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@click.option('-l', '--layer', multiple=True, help='Add given layer to the top of the output layer stack. Can be given multiple times.')
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def empty_template(output_svg, size, force, copper_layers, no_default_layers, layer):
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if output_svg == '-':
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out = sys.stdout
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else:
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out = Path(output_svg)
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if out.exists():
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if not force and not click.confirm(f'Output file "{out}" already exists. Do you want to overwrite it?'):
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raise click.ClickException(f'Output file "{out}" already exists, exiting.')
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out = out.open('w')
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layers = layer or []
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current_layer = None
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if not no_default_layers:
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layers += ['top paste', 'top silk', 'top mask']
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if copper_layers > 0:
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current_layer = 'top copper'
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inner = [ 'inner{i} copper' for i in range(max(0, copper_layers-2)) ]
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layers += ['top copper', *inner, 'bottom copper'][:copper_layers]
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layers += ['bottom mask', 'bottom silk', 'bottom paste']
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layers += ['outline', 'plated drill', 'nonplated drill', 'comments']
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if layers and current_layer is None:
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current_layer = layers[0]
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out.write(empty_pcb_template(size, layers, current_layer))
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out.flush()
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if output_svg != '-':
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out.close()
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@cli.command()
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@click.argument('input_svg', type=click.Path(exists=True, path_type=Path))
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@click.argument('output_gerbers', type=click.Path(path_type=Path))
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@click.option('-n', '--naming-scheme', default='kicad', type=click.Choice(['kicad', 'altium']), help='Naming scheme for gerber output file names.')
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@click.option('--zip/--no-zip', 'is_zip', default=None, help='zip output files. Default: zip if output path ends with ".zip" or when outputting to stdout.')
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@click.option('--separate-drill-file/--composite-drill-file', 'separate_drill', help='Use Altium composite Excellon drill file format (default)')
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@click.option('--dilate', default=0.1, type=float, help='Default dilation for subtraction operations in mm')
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@click.option('--curve-tolerance', type=float, help='Tolerance for curve flattening in mm')
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@click.option('--no-subtract', 'no_subtract', flag_value=True, help='Disable subtraction')
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@click.option('--subtract', help='Use user subtraction script from argument (see description above)')
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@click.option('--trace-space', type=float, default=0.1, help='passed through to svg-flatten')
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@click.option('--vectorizer', help='passed through to svg-flatten')
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@click.option('--vectorizer-map', help='passed through to svg-flatten')
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@click.option('--exclude-groups', help='passed through to svg-flatten')
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def convert(input_svg, output_gerbers, is_zip, dilate, curve_tolerance, no_subtract, subtract, trace_space, vectorizer,
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vectorizer_map, exclude_groups, separate_drill, naming_scheme):
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''' Convert SVG file directly to gerbers.
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Unlike `gerbolyze paste`, this does not add the SVG's contents to existing gerbers. It allows you to directly create
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PCBs using Inkscape similar to PCBModE.
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'''
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subtract_map = parse_subtract_script('' if no_subtract else subtract, dilate)
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output_is_zip = output_gerbers.name.lower().endswith('.zip') if is_zip is None else is_zip
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stack = gn.LayerStack({}, [], board_name=input_svg.stem, original_path=input_svg)
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for group_id, label in get_layers_from_svg(input_svg.read_text()):
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if not group_id or not label or 'no export' in label:
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continue
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if label == 'outline':
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side, use = 'mechanical', 'outline'
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elif label == 'comments':
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side, use = 'other', 'comments'
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elif len(label.split()) != 2:
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warnings.warn('Unknown layer {label}')
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continue
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else:
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side, use = label.split()
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grb = svg_to_gerber(input_svg,
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trace_space=trace_space, vectorizer=vectorizer, vectorizer_map=vectorizer_map,
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exclude_groups=exclude_groups, curve_tolerance=curve_tolerance, only_groups=group_id,
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outline_mode=(use == 'outline'))
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if use == 'drill':
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if side == 'plated':
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stack.drill_pth = grb.to_excellon(plated=True)
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elif side == 'nonplated':
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stack.drill_npth = grb.to_excellon(plated=False)
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else:
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warnings.warn(f'Invalid drill layer type "{side}". Must be one of "plated" or "nonplated"')
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else:
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stack.graphic_layers[(side, use)] = grb
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bounds = stack.board_bounds()
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@functools.lru_cache()
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def do_dilate(layer, amount):
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return dilate_gerber(layer, bounds, amount, curve_tolerance)
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for (side, use), layer in stack.graphic_layers.items():
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# dilated subtract layers on top of overlay
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if side in ('top', 'bottom'): # do not process subtraction scripts for inner layers
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dilations = subtract_map.get(use, [])
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for d_layer, amount in dilations:
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d_layer = stack.graphic_layers[(side, d_layer)]
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dilated = do_dilate(d_layer, amount)
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layer.merge(dilated, mode='below', keep_settings=True)
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if not separate_drill:
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print('merging drill layers')
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stack.merge_drill_layers()
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naming_scheme = getattr(gn.layers.NamingScheme, naming_scheme)
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if output_is_zip:
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stack.save_to_zipfile(output_gerbers, naming_scheme=naming_scheme)
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else:
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stack.save_to_directory(output_gerbers, naming_scheme=naming_scheme)
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# Subtraction script handling
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#============================
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DEFAULT_SUB_SCRIPT = '''
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out.silk -= in.mask
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out.silk -= in.silk+0.5
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out.mask -= in.mask+0.5
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out.copper -= in.copper+0.5
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'''
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def parse_subtract_script(script, default_dilation=0.1):
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if script is None:
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script = DEFAULT_SUB_SCRIPT
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subtract_script = {}
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lines = script.replace(';', '\n').splitlines()
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for line in lines:
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line = line.strip()
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if not line or line.startswith('#'):
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continue
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line = line.lower()
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line = re.sub('\s', '', line)
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# out.copper -= in.copper+0.1
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varname = r'([a-z]+\.[a-z]+)'
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floatnum = r'([+-][.0-9]+)'
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match = re.fullmatch(fr'{varname}-={varname}{floatnum}?', line)
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if not match:
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raise ValueError(f'Cannot parse line: {line}')
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out_var, in_var, dilation = match.groups()
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if not out_var.startswith('out.') or not in_var.startswith('in.'):
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raise ValueError('All left-hand side values must be outputs, right-hand side values must be inputs.')
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_out, _, out_layer = out_var.partition('.')
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_in, _, in_layer = in_var.partition('.')
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dilation = float(dilation) if dilation else default_dilation
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subtract_script[out_layer] = subtract_script.get(out_layer, []) + [(in_layer, dilation)]
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return subtract_script
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# Parameter parsing foo
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#======================
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def parse_bbox(bbox):
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if not bbox:
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return None
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elems = [ int(elem) for elem in re.split('[,/ ]', bbox) ]
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if len(elems) not in (2, 4):
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raise click.BadParameter(
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'--bbox must be either two floating-point values like: w,h or four like: x,y,w,h')
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elems = [ float(e) for e in elems ]
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if len(elems) == 2:
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bounds = [0, 0, *elems]
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else:
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bounds = elems
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# now transform bounds to the format pcb-tools uses. Instead of (x, y, w, h) or even (x1, y1, x2, y2), that
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# is ((x1, x2), (y1, y2)
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x, y, w, h = bounds
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return ((x, x+w), (y, y+h))
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# Utility foo
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# ===========
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def run_resvg(input_file, output_file, **resvg_args):
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args = []
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for key, value in resvg_args.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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args.append(f'--{key.replace("_", "-")}')
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if value is not True:
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args.append(value)
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args += [input_file, output_file]
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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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'resvg',
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'wasi-resvg',
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# in user-local cargo installation
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Path.home() / '.cargo' / 'bin' / 'resvg',
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# wasi-resvg in user-local pip installation
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Path.home() / '.local' / 'bin' / 'wasi-resvg',
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# next to our current python interpreter (e.g. in virtualenv)
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str(Path(sys.executable).parent / 'wasi-resvg')
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]
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# if RESVG envvar is set, try that first.
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if 'RESVG' in os.environ:
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exec_candidates = [os.environ['RESVG'], *exec_candidates]
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for candidate in candidates:
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try:
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res = subprocess.run([candidate, *args], check=True)
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print('used resvg:', candidate)
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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('resvg executable not found')
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def calculate_apertureless_bounding_box(cam):
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''' pcb-tools'es default bounding box function returns the bounding box of the primitives including apertures (i.e.
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line widths). For determining a board's size from the outline layer, we want the bounding box disregarding
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apertures.
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'''
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min_x = min_y = 1000000
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max_x = max_y = -1000000
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for prim in cam.primitives:
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bounds = prim.bounding_box_no_aperture
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min_x = min(bounds[0][0], min_x)
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max_x = max(bounds[0][1], max_x)
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min_y = min(bounds[1][0], min_y)
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max_y = max(bounds[1][1], max_y)
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return ((min_x, max_x), (min_y, max_y))
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# SVG export
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#===========
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def template_layer(name):
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return f'<g id="g-{name.lower()}" inkscape:label="{name}" inkscape:groupmode="layer"></g>'
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def template_svg_for_png(bounds, png_data, extra_layers, current_layer):
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(x1, y1), (x2, y2) = bounds
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w_mm, h_mm = (x2 - x1), (y2 - y1)
|
||
|
||
extra_layers = "\n ".join(template_layer(name) for name in extra_layers)
|
||
|
||
# we set up the viewport such that document dimensions = document units = mm
|
||
template = f'''<?xml version="1.0" encoding="UTF-8" standalone="no"?>
|
||
<svg version="1.1"
|
||
xmlns="http://www.w3.org/2000/svg"
|
||
xmlns:xlink="http://www.w3.org/1999/xlink"
|
||
xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
|
||
xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
|
||
width="{w_mm}mm" height="{h_mm}mm" viewBox="0 0 {w_mm} {h_mm}" >
|
||
<defs/>
|
||
<sodipodi:namedview inkscape:current-layer="g-{current_layer.lower()}" />
|
||
<g inkscape:label="Preview" inkscape:groupmode="layer" id="g-preview" sodipodi:insensitive="true" style="opacity:0.5">
|
||
<image x="0" y="0" width="{w_mm}" height="{h_mm}"
|
||
xlink:href="data:image/jpeg;base64,{base64.b64encode(png_data).decode()}" />
|
||
</g>
|
||
{extra_layers}
|
||
</svg>
|
||
'''
|
||
return textwrap.dedent(template)
|
||
|
||
def empty_pcb_template(size, extra_layers, current_layer):
|
||
w, h, unit = size
|
||
|
||
extra_layers = "\n ".join(template_layer(name) for name in extra_layers)
|
||
current_layer = f'<sodipodi:namedview inkscape:current-layer="g-{current_layer.lower()}" />' if current_layer else ''
|
||
|
||
# we set up the viewport such that document dimensions = document units = [unit]
|
||
template = f'''<?xml version="1.0" encoding="UTF-8" standalone="no"?>
|
||
<svg version="1.1"
|
||
xmlns="http://www.w3.org/2000/svg"
|
||
xmlns:xlink="http://www.w3.org/1999/xlink"
|
||
xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
|
||
xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
|
||
width="{w}{unit}" height="{h}{unit}" viewBox="0 0 {w} {h}" >
|
||
<defs/>
|
||
{current_layer}
|
||
{extra_layers}
|
||
</svg>
|
||
'''
|
||
return textwrap.dedent(template)
|
||
|
||
|
||
MM_PER_INCH = 25.4
|
||
|
||
def create_template_from_svg(svg, extra_layers, current_layer):
|
||
view, *layers = svg.children
|
||
view.attrs['inkscape__current_layer'] = f'g-{current_layer.lower()}'
|
||
|
||
extra_layers = [ template_layer(name) for name in extra_layers ]
|
||
svg.children = [ view, *extra_layers, gn.utils.Tag('g', layers, inkscape__label='Preview', sodipodi__insensitive='true',
|
||
inkscape__groupmode='layer', style='opacity:0.5') ]
|
||
|
||
return str(svg)
|
||
|
||
# SVG/gerber import
|
||
#==================
|
||
|
||
def dilate_gerber(layer, bounds, dilation, curve_tolerance):
|
||
with tempfile.NamedTemporaryFile(suffix='.svg') as temp_svg:
|
||
Path(temp_svg.name).write_text(str(layer.instance.to_svg(force_bounds=bounds, fg='white')))
|
||
|
||
# dilate & render back to gerber
|
||
# NOTE: Maybe reconsider or nicely document dilation semantics ; It is weird that negative dilations affect
|
||
# clear color and positive affects dark colors
|
||
out = svg_to_gerber(temp_svg.name, dilate=-dilation, curve_tolerance=curve_tolerance)
|
||
return out
|
||
|
||
def svg_to_gerber(infile, outline_mode=False, **kwargs):
|
||
infile = Path(infile)
|
||
|
||
args = [ '--format', ('gerber-outline' if outline_mode else 'gerber'),
|
||
'--precision', '6', # intermediate file, use higher than necessary precision
|
||
]
|
||
|
||
for k, v in kwargs.items():
|
||
if v is not None:
|
||
args.append('--' + k.replace('_', '-'))
|
||
if not isinstance(v, bool):
|
||
args.append(str(v))
|
||
|
||
with tempfile.NamedTemporaryFile(suffix='.gbr') as temp_gbr:
|
||
args += [str(infile), str(temp_gbr.name)]
|
||
|
||
if 'SVG_FLATTEN' in os.environ:
|
||
subprocess.run([os.environ['SVG_FLATTEN'], *args], check=True)
|
||
print('used svg-flatten at $SVG_FLATTEN')
|
||
|
||
else:
|
||
# By default, try four options:
|
||
for candidate in [
|
||
# somewhere in $PATH
|
||
'svg-flatten',
|
||
None, # direct WASI import
|
||
'wasi-svg-flatten',
|
||
|
||
# in user-local pip installation
|
||
Path.home() / '.local' / 'bin' / 'svg-flatten',
|
||
Path.home() / '.local' / 'bin' / 'wasi-svg-flatten',
|
||
|
||
# next to our current python interpreter (e.g. in virtualenv)
|
||
str(Path(sys.executable).parent / 'svg-flatten'),
|
||
str(Path(sys.executable).parent / 'wasi-svg-flatten'),
|
||
|
||
# next to this python source file in the development repo
|
||
str(Path(__file__).parent.parent / 'svg-flatten' / 'build' / 'svg-flatten') ]:
|
||
|
||
try:
|
||
if candidate is None:
|
||
import svg_flatten_wasi
|
||
svg_flatten_wasi.run_svg_flatten.callback(args[-2], args[-1], args[:-2], no_usvg=False)
|
||
print('used svg_flatten_wasi python package')
|
||
|
||
else:
|
||
subprocess.run([candidate, *args], check=True)
|
||
print('used svg-flatten at', candidate)
|
||
|
||
break
|
||
except (FileNotFoundError, ModuleNotFoundError):
|
||
continue
|
||
|
||
else:
|
||
raise SystemError('svg-flatten executable not found')
|
||
|
||
return gn.rs274x.GerberFile.open(temp_gbr.name)
|
||
|
||
def get_layers_from_svg(svg_data):
|
||
svg = etree.fromstring(svg_data.encode('utf-8'))
|
||
SVG_NS = '{http://www.w3.org/2000/svg}'
|
||
INKSCAPE_NS = '{http://www.inkscape.org/namespaces/inkscape}'
|
||
|
||
# find groups
|
||
for group in svg.findall(SVG_NS+'g'):
|
||
yield group.get('id'), group.get(INKSCAPE_NS+'label')
|
||
|
||
|
||
if __name__ == '__main__':
|
||
cli()
|