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authorjaseg <git@jaseg.de>2021-01-31 01:21:54 +0100
committerjaseg <git@jaseg.de>2021-01-31 01:21:54 +0100
commit04f1cab5fce77f61ca09dbcf02a7aff9780853f6 (patch)
tree474d29ccc4a4a7ea40a67b41d7bba78dea32b1dc /gerbolyze
parent133f5bb98d15f3e36487d188aeaa2909bb7c90a1 (diff)
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Re-did all the render code
Diffstat (limited to 'gerbolyze')
-rwxr-xr-xgerbolyze/gerbolyze.py508
1 files changed, 176 insertions, 332 deletions
diff --git a/gerbolyze/gerbolyze.py b/gerbolyze/gerbolyze.py
index 3284ae7..64d32c7 100755
--- a/gerbolyze/gerbolyze.py
+++ b/gerbolyze/gerbolyze.py
@@ -1,12 +1,15 @@
-#!/usr/bin/env python3
-
import tempfile
import os.path as path
+from pathlib import Path
import os
+import re
import sys
+import warnings
import time
import shutil
import math
+from zipfile import ZipFile, is_zipfile
+import shutil
import gerber
from gerber.render.cairo_backend import GerberCairoContext
@@ -14,277 +17,134 @@ import numpy as np
import cv2
import enum
import tqdm
-
-def generate_mask(
- outline,
- target,
- scale,
- bounds,
- debugimg,
- status_print,
- extend_overlay_r_mil,
- subtract_gerber
- ):
- # Render all gerber layers whose features are to be excluded from the target image, such as board outline, the
- # original silk layer and the solder paste layer to binary images.
- with tempfile.TemporaryDirectory() as tmpdir:
- img_file = path.join(tmpdir, 'target.png')
-
- status_print('Combining keepout composite')
- fg, bg = gerber.render.RenderSettings((1, 1, 1)), gerber.render.RenderSettings((0, 0, 0))
- ctx = GerberCairoContext(scale=scale)
- status_print(' * outline')
- ctx.render_layer(outline, settings=fg, bgsettings=bg, bounds=bounds)
- status_print(' * target layer')
- ctx.render_layer(target, settings=fg, bgsettings=bg, bounds=bounds)
- for fn, sub in subtract_gerber:
- status_print(' * extra layer', os.path.basename(fn))
- layer = gerber.loads(sub)
- ctx.render_layer(layer, settings=fg, bgsettings=bg, bounds=bounds)
- status_print('Rendering keepout composite')
- ctx.dump(img_file)
-
- # Vertically flip exported image
- original_img = cv2.imread(img_file, cv2.IMREAD_GRAYSCALE)[::-1, :]
-
- f = 1 if outline.units == 'inch' else 25.4
- r = 1+2*max(1, int(extend_overlay_r_mil/1000 * f * scale))
- status_print('Expanding keepout composite by', r)
-
- # Extend image by a few pixels and flood-fill from (0, 0) to mask out the area outside the outermost outline
- # This ensures no polygons are generated outside the board even for non-rectangular boards.
- border = 10
- outh, outw = original_img.shape
- extended_img = np.zeros((outh + 2*border, outw + 2*border), dtype=np.uint8)
- extended_img[border:outh+border, border:outw+border] = original_img
- debugimg(extended_img, 'outline')
- cv2.floodFill(extended_img, None, (0, 0), (255,))
- original_img = extended_img[border:outh+border, border:outw+border]
- debugimg(extended_img, 'flooded')
-
- # Dilate the white areas of the image using gaussian blur and threshold. Use these instead of primitive dilation
- # here for their non-directionality.
- target_img = cv2.blur(original_img, (r, r))
- _, target_img = cv2.threshold(target_img, 255//(1+r), 255, cv2.THRESH_BINARY)
- return target_img
-
-def render_gerbers_to_image(*gerbers, scale, bounds=None):
+import click
+
+@click.command()
+@click.argument('input')
+@click.option('-t' ,'--top', help='Top layer output file.')
+@click.option('-b' ,'--bottom', help='Bottom layer output file. --top or --bottom may be given at once. If neither is given, autogenerate filenames.')
+@click.option('--bbox', help='Output file bounding box. Format: "w,h" to force [w] mm by [h] mm output canvas OR '
+ '"x,y,w,h" to force [w] mm by [h] mm output canvas with its bottom left corner at the given input gerber '
+ 'coördinates.')
+def render_preview(input, top, bottom, bbox):
+ ''' Render gerber file into template to be used with gerbolyze --vectorize.
+
+ INPUT may be a gerber file, directory of gerber files or zip file with gerber files
+ '''
with tempfile.TemporaryDirectory() as tmpdir:
- img_file = path.join(tmpdir, 'target.png')
- fg, bg = gerber.render.RenderSettings((1, 1, 1)), gerber.render.RenderSettings((0, 0, 0))
- ctx = GerberCairoContext(scale=scale)
-
- for grb in gerbers:
- ctx.render_layer(grb, settings=fg, bgsettings=bg, bounds=bounds)
-
- ctx.dump(img_file)
- # Vertically flip exported image to align coordinate systems
- return cv2.imread(img_file, cv2.IMREAD_GRAYSCALE)[::-1, :]
-
-def pcb_area_mask(outline, scale, bounds):
- # Merge layers to target mask
- img = render_gerbers_to_image(outline, scale=scale, bounds=bounds)
- # Extend
- imgh, imgw = img.shape
- img_ext = np.zeros(shape=(imgh+2, imgw+2), dtype=np.uint8)
- img_ext[1:-1, 1:-1] = img
- # Binarize
- img_ext[img_ext < 128] = 0
- img_ext[img_ext >= 128] = 255
- # Flood-fill
- cv2.floodFill(img_ext, None, (0, 0), (255,)) # Flood-fill with white from top left corner (0,0)
- img_ext_snap = img_ext.copy()
- cv2.floodFill(img_ext, None, (0, 0), (0,)) # Flood-fill with black
- cv2.floodFill(img_ext, None, (0, 0), (255,)) # Flood-fill with white
- return np.logical_xor(img_ext_snap, img_ext)[1:-1, 1:-1].astype(float)
-
-def generate_template(
- silk, mask, copper, outline, drill,
- image,
- process_resolution:float=6, # mil
- resolution_oversampling:float=10, # times
- status_print=lambda *args:None
- ):
-
- silk, mask, copper, outline, *drill = map(gerber.load_layer_data, [silk, mask, copper, outline, *drill])
- silk.layer_class = 'topsilk'
- mask.layer_class = 'topmask'
- copper.layer_class = 'top'
- outline.layer_class = 'outline'
-
-
- f = 1.0 if outline.cam_source.units == 'metric' else 25.4
- scale = (1000/process_resolution) / 25.4 * resolution_oversampling * f # dpmm
- bounds = outline.cam_source.bounding_box
-
- # Create a new drawing context
- ctx = GerberCairoContext(scale=scale)
-
- ctx.render_layer(outline, bounds=bounds)
- ctx.render_layer(copper, bounds=bounds)
- ctx.render_layer(mask, bounds=bounds)
- ctx.render_layer(silk, bounds=bounds)
- for dr in drill:
- ctx.render_layer(dr, bounds=bounds)
- ctx.dump(image)
-
-def paste_image(
- target_gerber:str,
- outline_gerber:str,
- source_img:np.ndarray,
- subtract_gerber:list=[],
- extend_overlay_r_mil:float=6,
- extend_picture_r_mil:float=2,
- status_print=lambda *args:None,
- debugdir:str=None):
-
- debugctr = 0
- def debugimg(img, name):
- nonlocal debugctr
- if debugdir:
- cv2.imwrite(path.join(debugdir, '{:02d}{}.png'.format(debugctr, name)), img)
- debugctr += 1
-
- # Parse outline layer to get bounds of gerber file
- status_print('Parsing outline gerber')
- outline = gerber.loads(outline_gerber)
- bounds = (minx, maxx), (miny, maxy) = outline.bounding_box
- grbw, grbh = maxx - minx, maxy - miny
- status_print(' * outline has offset {}, size {}'.format((minx, miny), (grbw, grbh)))
-
- # Parse target layer
- status_print('Parsing target gerber')
- target = gerber.loads(target_gerber)
- (tminx, tmaxx), (tminy, tmaxy) = target.bounding_box
- status_print(' * target layer has offset {}, size {}'.format((tminx, tminy), (tmaxx-tminx, tmaxy-tminy)))
-
- # Read source image
- imgh, imgw = source_img.shape
- scale = math.ceil(max(imgw/grbw, imgh/grbh)) # scale is in dpmm
- status_print(' * source image has size {}, going for scale {}dpmm'.format((imgw, imgh), scale))
-
- # Merge layers to target mask
- target_img = generate_mask(outline, target, scale, bounds, debugimg, status_print, extend_overlay_r_mil, subtract_gerber)
-
- # Threshold source image. Ideally, the source image is already binary but in case it's not, or in case it's not
- # exactly binary (having a few very dark or very light grays e.g. due to JPEG compression) we're thresholding here.
- status_print('Thresholding source image')
- qr = 1+2*max(1, int(extend_picture_r_mil/1000 * scale))
- source_img = source_img[::-1]
- _, source_img = cv2.threshold(source_img, 127, 255, cv2.THRESH_BINARY)
- debugimg(source_img, 'thresh')
-
- # Pad image to size of target layer images generated above. After this, `scale` applies to the padded image as well
- # as the gerber renders. For padding, zoom or shrink the image to completely fit the gerber's rectangular bounding
- # box. Center the image vertically or horizontally if it has a different aspect ratio.
- status_print('Padding source image')
- tgth, tgtw = target_img.shape
- padded_img = np.zeros(shape=target_img.shape, dtype=source_img.dtype)
- offx = int((minx-tminx if tminx < minx else 0)*scale)
- offy = int((miny-tminy if tminy < miny else 0)*scale)
- offx += int(grbw*scale - imgw) // 2
- offy += int(grbh*scale - imgh) // 2
- endx, endy = min(offx+imgw, tgtw), min(offy+imgh, tgth)
- print('off', (offx, offy), 'end', (endx, endy), 'img', (imgw, imgh), 'tgt', (tgtw, tgth))
- padded_img[offy:endy, offx:endx] = source_img[:endy-offy, :endx-offx]
- debugimg(padded_img, 'padded')
- debugimg(target_img, 'target')
-
- # Mask out excluded gerber features (source silk, holes, solder mask etc.) from the target image
- status_print('Masking source image')
- out_img = (np.multiply((padded_img/255.0), (target_img/255.0) * -1 + 1) * 255).astype(np.uint8)
-
- debugimg(out_img, 'multiplied')
-
- # Calculate contours from masked target image and plot them to the target gerber context
- status_print('Calculating contour lines')
- plot_contours(out_img,
- target,
- offx=(minx, miny),
- scale=scale,
- status_print=lambda *args: status_print(' ', *args))
-
- # Write target gerber context to disk
- status_print('Generating output gerber')
- from gerber.render import rs274x_backend
- ctx = rs274x_backend.Rs274xContext(target.settings)
- target.render(ctx)
- out = ctx.dump().getvalue()
- status_print('Done.')
- return out
+ tmpdir = Path(tmpdir)
+ source = Path(input)
+
+ filetype = 'svg'
+
+ if not top and not bottom: # autogenerate two file names if neither --top nor --bottom are given
+ # /path/to/gerber/dir -> /path/to/gerber/dir.preview-{top|bottom}.svg
+ # /path/to/gerbers.zip -> /path/to/gerbers.zip.preview-{top|bottom}.svg
+ # /path/to/single/file.grb -> /path/to/single/file.grb.preview-{top|bottom}.svg
+ outfiles = {
+ 'top': source.parent / f'{source.name}.preview-top.{filetype}',
+ 'bottom': source.parent / f'{source.name}.preview-top.{filetype}' }
+ else:
+ outfiles = {
+ 'top': Path(top) if top else None,
+ 'bottom': Path(bottom) if bottom else None }
+ # If source is not a directory with gerber files (-> zip/single gerber), make it one
+ if not source.is_dir():
+ tmp_indir = tmpdir / 'input'
+ tmp_indir.mkdir()
-def plot_contours(
- img:np.ndarray,
- layer:gerber.rs274x.GerberFile,
- offx:tuple,
- scale:float,
- debug=lambda *args:None,
- status_print=lambda *args:None):
- from gerber.primitives import Line, Region, Circle
- imgh, imgw = img.shape
-
- # Extract contour hierarchy using OpenCV
- status_print('Extracting contours')
- # See https://stackoverflow.com/questions/48291581/how-to-use-cv2-findcontours-in-different-opencv-versions/48292371
- contours, hierarchy = cv2.findContours(img, cv2.RETR_TREE, cv2.CHAIN_APPROX_TC89_KCOS)[-2:]
-
- aperture = list(layer.apertures)[0] if layer.apertures else Circle(None, 0.10)
-
- status_print('offx', offx, 'scale', scale)
-
- xbias, ybias = offx
- def map(coord):
- x, y = coord
- return (x/scale + xbias, y/scale + ybias)
- def contour_lines(c):
- return [ Line(map(start), map(end), aperture, units=layer.settings.units)
- for start, end in zip(c, np.vstack((c[1:], c[:1]))) ]
-
- done = []
- process_stack = [-1]
- next_process_stack = []
- parents = [ (i, first_child != -1, parent) for i, (_1, _2, first_child, parent) in enumerate(hierarchy[0]) ]
- is_dark = True
- status_print('Converting contours to gerber primitives')
- with tqdm.tqdm(total=len(contours)) as progress:
- while len(done) != len(contours):
- for i, has_children, parent in parents[:]:
- if parent in process_stack:
- contour = contours[i]
- polarity = 'dark' if is_dark else 'clear'
- debug('rendering {} with parent {} as {} with {} vertices'.format(i, parent, polarity, len(contour)))
- debug('process_stack is', process_stack)
- debug()
- layer.primitives.append(Region(contour_lines(contour[:,0]), level_polarity=polarity, units=layer.settings.units))
- if has_children:
- next_process_stack.append(i)
- done.append(i)
- parents.remove((i, has_children, parent))
- progress.update(1)
- debug('skipping to next level')
- process_stack, next_process_stack = next_process_stack, []
- is_dark = not is_dark
- debug('done', done)
+ if source.suffix.lower() == '.zip' or is_zipfile(source):
+ with ZipFile(source) as f:
+ f.extractall(path=tmp_indir)
-# Utility foo
-# ===========
+ else: # single input file
+ shutil.copy(source, tmp_indir)
-def find_gerber_in_dir(dir_path, extensions, exclude=''):
- contents = os.listdir(dir_path)
- exts = extensions.split('|')
- excs = exclude.split('|')
- for entry in contents:
- if any(entry.lower().endswith(ext.lower()) for ext in exts) and not any(entry.lower().endswith(ex) for ex in excs if exclude):
- lname = path.join(dir_path, entry)
- if not path.isfile(lname):
+ source = tmp_indir
+ # source now is a directory with gerber files.
+
+ bounds = None
+ if bbox:
+ elems = [ int(elem) for elem in re.split('[,/ ]', bbox) ]
+ if len(elems) not in (2, 4):
+ raise click.BadParameter(
+ '--bbox must be either two floating-point values like: w,h or four like: x,y,w,h')
+
+ elems = [ float(e) for e in elems ]
+
+ if len(elems) == 2:
+ bounds = [0, 0, *elems]
+ else:
+ bounds = elems
+
+ matches = match_gerbers_in_dir(source)
+ for side in ('top', 'bottom'):
+ flattened = [ e for for_this_layer in matches[side].values() for e in for_this_layer ]
+
+ if not outfiles[side]:
+ continue
+
+ if not flattened:
+ warnings.warn(f'No input gerber files found for {side} side')
continue
- with open(lname, 'r') as f:
- return lname, f.read()
- raise ValueError(f'Cannot find file with suffix {extensions} in dir {dir_path}')
+ def load(layer, path):
+ print('loading', layer, path)
+ grb = gerber.load_layer(str(path))
+ grb.layer_class = LAYER_CLASSES.get(layer, 'unknown')
+ return grb
+
+ layers = { layer: [ load(layer, path) for path in files ]
+ for layer, files in matches[side].items()
+ if files }
+
+ for layer, elems in layers.items():
+ if len(elems) > 1 and layer != 'drill':
+ raise click.UsageError(f'Multiple files found for layer {layer}: {", ".join(matches[side][layer]) }')
+
+ unitses = set(layer.cam_source.units for items in layers.values() for layer in items)
+ if len(unitses) != 1:
+ # FIXME: we should ideally be able to deal with this. We'll have to figure out a way to update a
+ # GerberCairoContext's scale in between layers.
+ raise SystemError('Input gerber files mix metric and imperial units. Please fix your export.')
+ units, = unitses
+
+ # cairo-svg uses a hardcoded dpi value of 72. pcb-tools does something weird, so we have to scale things
+ # here.
+ scale = 1/25.4 if units == 'metric' else 1.0 # pcb-tools gerber scale
+ scale *= 72.0 # cairo-svg dpi
+ # NOTE: When the user has not set explicit bounds, we automatically extract the design's bounding box from
+ # the input gerber files. If a folder is used as input, we use the outline gerber and barf if we can't find
+ # one. If only a single file is given, we simply use that file's bounding box
+ #
+ # We have to do things this way since gerber files do not have explicit bounds listed.
+ #
+ # Note that the bounding box extracted from the outline layer usually will be one outline layer stroke widht
+ # larger in all directions than the finished board.
+ if not bounds:
+ if 'outline' in layers:
+ bounds = calculate_apertureless_bounding_box(layers['outline'][0].cam_source)
+
+ elif len(flattened) == 1:
+ bounds = flattened[0].cam_source.bounding_box
+
+ else:
+ raise click.UsageError('Cannot find an outline file and no --bbox given.')
+
+ ctx = GerberCairoContext(scale=scale)
+ for layer_name in LAYER_RENDER_ORDER:
+ for to_render in layers.get(layer_name, ()):
+ ctx.render_layer(to_render, bounds=bounds)
+ print('pixel size:', ctx.scale_point(ctx.size_in_inch), 'in inch:', ctx.size_in_inch)
+ ctx.dump(str(outfiles[side]))
+
+# Utility foo
+# ===========
# Gerber file name extensions for Altium/Protel | KiCAD | Eagle
+# Note that in case of KiCAD these extensions occassionally change without notice. If you discover that this list is not
+# up to date, please know that it's not my fault and submit an issue or send me an email.
LAYER_SPEC = {
'top': {
'paste': '.gtp|-F_Paste.gbr|-F.Paste.gbr|.pmc',
@@ -292,81 +152,65 @@ LAYER_SPEC = {
'mask': '.gts|-F_Mask.gbr|-F.Mask.gbr|.stc',
'copper': '.gtl|-F_Cu.gbr|-F.Cu.gbr|.cmp',
'outline': '.gko|.gm1|-Edge_Cuts.gbr|-Edge.Cuts.gbr|.gmb',
+ 'drill': '.drl|.txt|-npth.drl',
},
'bottom': {
'paste': '.gbp|-B_Paste.gbr|-B.Paste.gbr|.pms',
'silk': '.gbo|-B_SilkS.gbr|-B.SilkS.gbr|.pls',
'mask': '.gbs|-B_Mask.gbr|-B.Mask.gbr|.sts',
'copper': '.gbl|-B_Cu.gbr|-B.Cu.gbr|.sol',
- 'outline': '.gko|.gm1|-Edge_Cuts.gbr|-Edge.Cuts.gbr|.gmb'
+ 'outline': '.gko|.gm1|-Edge_Cuts.gbr|-Edge.Cuts.gbr|.gmb',
+ 'drill': '.drl|.txt|-npth.drl',
},
}
-# Command line interface
-# ======================
-
-def process_gerbers(source, target, image, side, layer, debugdir):
- if not os.path.isdir(source):
- raise ValueError(f'Given source "{source}" is not a directory.')
-
- # Load input files
- source_img = cv2.imread(image, cv2.IMREAD_GRAYSCALE)
- if source_img is None:
- print(f'"{image}" is not a valid image file', file=sys.stderr)
- sys.exit(1)
-
- tlayer, slayer = {
- 'silk': ('silk', 'mask'),
- 'mask': ('mask', 'silk'),
- 'copper': ('copper', None)
- }[layer]
-
- layers = LAYER_SPEC[side]
- tname, tgrb = find_gerber_in_dir(source, layers[tlayer])
- print('Target layer file {}'.format(os.path.basename(tname)))
- oname, ogrb = find_gerber_in_dir(source, layers['outline'])
- print('Outline layer file {}'.format(os.path.basename(oname)))
- subtract = find_gerber_in_dir(source, layers[slayer]) if slayer else None
-
- # Prepare output. Do this now to error out as early as possible if there's a problem.
- if os.path.exists(target):
- if os.path.isdir(target) and sorted(os.listdir(target)) == sorted(os.listdir(source)):
- shutil.rmtree(target)
- else:
- print('Error: Target already exists and does not look like source. Please manually remove the target dir before proceeding.', file=sys.stderr)
- sys.exit(1)
-
- # Generate output
- out = paste_image(tgrb, ogrb, source_img, [subtract], debugdir=debugdir, status_print=lambda *args: print(*args, flush=True))
-
- shutil.copytree(source, target)
- with open(os.path.join(target, os.path.basename(tname)), 'w') as f:
- f.write(out)
-
-def render_preview(source, image, side, process_resolution, resolution_oversampling):
- def load_layer(layer):
- name, grb = find_gerber_in_dir(source, LAYER_SPEC[side][layer])
- print(f'{layer} layer file {os.path.basename(name)}')
- return grb
-
- outline = load_layer('outline')
- silk = load_layer('silk')
- mask = load_layer('mask')
- copper = load_layer('copper')
-
- try:
- nm, npth = find_gerber_in_dir(source, '-npth.drl')
- print(f'npth drill file {nm}')
- except ValueError:
- npth = None
- nm, drill = find_gerber_in_dir(source, '.drl|.txt', exclude='-npth.drl')
- print(f'drill file {nm}')
- drill = ([npth] if npth else []) + [drill]
-
- generate_template(
- silk, mask, copper, outline, drill,
- image,
- process_resolution=process_resolution,
- resolution_oversampling=resolution_oversampling,
- )
+# Maps keys from LAYER_SPEC to pcb-tools layer classes (see pcb-tools'es gerber/layers.py)
+LAYER_CLASSES = {
+ 'silk': 'topsilk',
+ 'mask': 'topmask',
+ 'paste': 'toppaste',
+ 'copper': 'top',
+ 'outline': 'outline',
+ 'drill': 'drill',
+ }
+
+LAYER_RENDER_ORDER = [ 'copper', 'mask', 'silk', 'paste', 'outline', 'drill' ]
+
+def match_gerbers_in_dir(path):
+ out = {}
+ for side, layers in LAYER_SPEC.items():
+ out[side] = {}
+ for layer, match in layers.items():
+ out[side][layer] = list(find_gerber_in_dir(path, match))
+ return out
+
+def find_gerber_in_dir(path, extensions):
+ exts = extensions.split('|')
+ for entry in path.iterdir():
+ if not entry.is_file():
+ continue
+
+ if any(entry.name.lower().endswith(suffix.lower()) for suffix in exts):
+ yield entry
+
+def calculate_apertureless_bounding_box(cam):
+ ''' pcb-tools'es default bounding box function returns the bounding box of the primitives including apertures (i.e.
+ line widths). For determining a board's size from the outline layer, we want the bounding box disregarding
+ apertures.
+ '''
+
+ min_x = min_y = 1000000
+ max_x = max_y = -1000000
+
+ for prim in cam.primitives:
+ bounds = prim.bounding_box_no_aperture
+ min_x = min(bounds[0][0], min_x)
+ max_x = max(bounds[0][1], max_x)
+
+ min_y = min(bounds[1][0], min_y)
+ max_y = max(bounds[1][1], max_y)
+
+ return ((min_x, max_x), (min_y, max_y))
+if __name__ == '__main__':
+ render_preview()