#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright 2022 Jan Götte <code@jaseg.de>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Based on https://github.com/tracespace/tracespace
#
import math
from PIL import Image
import pytest
from ..rs274x import GerberFile
from ..cam import FileSettings
from .image_support import *
from .utils import *
REFERENCE_FILES = [ l.strip() for l in '''
board_outline.GKO
example_outline_with_arcs.gbr
example_two_square_boxes.gbr
example_coincident_hole.gbr
example_cutin.gbr
example_cutin_multiple.gbr
example_flash_circle.gbr
example_flash_obround.gbr
example_flash_polygon.gbr
example_flash_rectangle.gbr
example_fully_coincident.gbr
example_guess_by_content.g0
example_holes_dont_clear.gbr
example_level_holes.gbr
example_not_overlapping_contour.gbr
example_not_overlapping_touching.gbr
example_overlapping_contour.gbr
example_overlapping_touching.gbr
example_simple_contour.gbr
example_single_contour_1.gbr
example_single_contour_2.gbr
example_single_contour_3.gbr
example_am_exposure_modifier.gbr
bottom_copper.GBL
bottom_mask.GBS
bottom_silk.GBO
eagle_files/copper_bottom_l4.gbr
eagle_files/copper_inner_l2.gbr
eagle_files/copper_inner_l3.gbr
eagle_files/copper_top_l1.gbr
eagle_files/profile.gbr
eagle_files/silkscreen_bottom.gbr
eagle_files/silkscreen_top.gbr
eagle_files/soldermask_bottom.gbr
eagle_files/soldermask_top.gbr
eagle_files/solderpaste_bottom.gbr
eagle_files/solderpaste_top.gbr
multiline_read.ger
test_fine_lines_x.gbr
test_fine_lines_y.gbr
top_copper.GTL
top_mask.GTS
top_silk.GTO
open_outline_altium.gbr
easyeda/Gerber_TopSolderMaskLayer.GTS
easyeda/Gerber_TopSilkLayer.GTO
easyeda/Gerber_BottomSolderMaskLayer.GBS
easyeda/Gerber_BoardOutline.GKO
easyeda/Gerber_TopLayer.GTL
easyeda/Gerber_BottomLayer.GBL
easyeda/Gerber_TopPasteMaskLayer.GTP
allegro-2/MinnowMax_RevA1_GAF_Gerber/MinnowMax_lyr2.art
allegro-2/MinnowMax_RevA1_GAF_Gerber/MinnowMax_lyr3.art
allegro-2/MinnowMax_RevA1_GAF_Gerber/MinnowMax_fab.art
allegro-2/MinnowMax_RevA1_GAF_Gerber/MinnowMax_lyr10_GAF.art
allegro-2/MinnowMax_RevA1_GAF_Gerber/MinnowMax_lyr7.art
allegro-2/MinnowMax_RevA1_GAF_Gerber/MinnowMax_sps.art
allegro-2/MinnowMax_RevA1_GAF_Gerber/MinnowMax_lyr6.art
allegro-2/MinnowMax_RevA1_GAF_Gerber/MinnowMax_lyr1_GAF.art
allegro-2/MinnowMax_RevA1_GAF_Gerber/MinnowMax_assy.art
allegro-2/MinnowMax_RevA1_GAF_Gerber/MinnowMax_smc_GAF.art
allegro-2/MinnowMax_RevA1_GAF_Gerber/MinnowMax_lyr4.art
allegro-2/MinnowMax_RevA1_GAF_Gerber/MinnowMax_lyr5.art
allegro-2/MinnowMax_RevA1_GAF_Gerber/MinnowMax_bslk.art
allegro-2/MinnowMax_RevA1_GAF_Gerber/MinnowMax_spc.art
allegro-2/MinnowMax_RevA1_GAF_Gerber/MinnowMax_tslk_GAF.art
allegro-2/MinnowMax_RevA1_GAF_Gerber/MinnowMax_lyr8.art
allegro-2/MinnowMax_RevA1_GAF_Gerber/MinnowMax_sms_GAF.art
allegro-2/MinnowMax_RevA1_GAF_Gerber/MinnowMax_lyr9.art
eagle-newer/solderpaste_bottom.gbr
eagle-newer/silkscreen_bottom.gbr
eagle-newer/profile.gbr
eagle-newer/copper_bottom.gbr
eagle-newer/soldermask_top.gbr
eagle-newer/solderpaste_top.gbr
eagle-newer/soldermask_bottom.gbr
eagle-newer/silkscreen_top.gbr
eagle-newer/copper_top.gbr
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.G4
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.G9
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.GBL
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.GTO
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.G11
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.G1
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.GBP
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.G2
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.GM15
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.GTS
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.G6
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.G7
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.G3
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.GPB
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.GM1
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.G12
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.GBS
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.GTL
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.G10
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.GM14
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.G5
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.GTP
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.GBO
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.G8
altium-composite-drill/Gerber/LimeSDR-QPCIe_1v2.GPT
geda/driver.topmask.gbr
geda/controller.top.gbr
geda/controller.bottom.gbr
geda/driver.bottommask.gbr
geda/driver.top.gbr
geda/driver.bottom.gbr
geda/controller.topsilk.gbr
geda/controller.fab.gbr
geda/driver.topsilk.gbr
geda/controller.group3.gbr
geda/controller.topmask.gbr
geda/driver.group5.gbr
geda/controller.bottommask.gbr
geda/driver.fab.gbr
pcb-rnd/power-art.gko
pcb-rnd/power-art.ast
pcb-rnd/power-art.gtl
pcb-rnd/power-art.lht
pcb-rnd/power-art.gto
pcb-rnd/power-art.gtp
pcb-rnd/power-art.asb
pcb-rnd/power-art.gbp
pcb-rnd/power-art.gbs
pcb-rnd/power-art.gbl
pcb-rnd/power-art.fab
pcb-rnd/power-art.gbo
pcb-rnd/power-art.gts
siemens/80101_0125_F200_L04.gdo
siemens/80101_0125_F200_L12_Bottom.gdo
siemens/80101_0125_F200_L11.gdo
siemens/80101_0125_F200_L10.gdo
siemens/80101_0125_F200_SolderPasteTop.gdo
siemens/80101_0125_F200_SoldermaskTop.gdo
siemens/80101_0125_F200_L06.gdo
siemens/80101_0125_F200_L02.gdo
siemens/80101_0125_F200_SilkscreenBottom.gdo
siemens/80101_0125_F200_SoldermaskBottom.gdo
siemens/80101_0125_F200_SolderPasteBottom.gdo
siemens/80101_0125_F200_L03.gdo
siemens/80101_0125_F200_L01_Top.gdo
Target3001/IRNASIoTbank1.2.Bot
Target3001/IRNASIoTbank1.2.Outline
Target3001/IRNASIoTbank1.2.PasteBot
Target3001/IRNASIoTbank1.2.PasteTop
Target3001/IRNASIoTbank1.2.PosiBot
Target3001/IRNASIoTbank1.2.PosiTop
Target3001/IRNASIoTbank1.2.StopBot
Target3001/IRNASIoTbank1.2.StopTop
Target3001/IRNASIoTbank1.2.Top
kicad-older/chibi_2024-Edge.Cuts.gbr
kicad-older/chibi_2024-F.SilkS.gbr
kicad-older/chibi_2024-B.Paste.gbr
kicad-older/chibi_2024-B.Cu.gbr
kicad-older/chibi_2024-F.Mask.gbr
kicad-older/chibi_2024-B.Mask.gbr
kicad-older/chibi_2024-F.Paste.gbr
kicad-older/chibi_2024-B.SilkS.gbr
kicad-older/chibi_2024-F.Cu.gbr
fritzing/combined.gbs
fritzing/combined.gm1
fritzing/combined.gbl
fritzing/combined.gbo
fritzing/combined.GKO
fritzing/combined.gtl
fritzing/combined.gts
fritzing/combined.gto
siemens-2/Gerber/SoldermaskTop.gdo
siemens-2/Gerber/EtchLayerTop.gdo
siemens-2/Gerber/DrillDrawingThrough.gdo
siemens-2/Gerber/SoldermaskBottom.gdo
siemens-2/Gerber/SolderPasteBottom.gdo
siemens-2/Gerber/SolderPasteTop.gdo
siemens-2/Gerber/EtchLayerBottom.gdo
siemens-2/Gerber/GerberPlot.gpf
siemens-2/Gerber/BoardOutlline.gdo
upverter/design_export.gko
upverter/design_export.gtl
upverter/design_export.gbp
upverter/design_export.gtp
upverter/design_export.gbl
upverter/design_export.gto
upverter/design_export.gbs
upverter/design_export.gts
upverter/design_export.gbo
eagle_files/solderpaste_bottom.gbr
eagle_files/silkscreen_bottom.gbr
eagle_files/profile.gbr
eagle_files/copper_inner_l2.gbr
eagle_files/copper_top_l1.gbr
eagle_files/soldermask_top.gbr
eagle_files/copper_inner_l3.gbr
eagle_files/solderpaste_top.gbr
eagle_files/soldermask_bottom.gbr
eagle_files/copper_bottom_l4.gbr
eagle_files/silkscreen_top.gbr
diptrace/panel_BoardOutline.gbr
diptrace/keyboard_BottomSilk.gbr
diptrace/keyboard_Bottom.gbr
diptrace/mainboard_Top.gbr
diptrace/mainboard_TopMask.gbr
diptrace/mainboard_BoardOutline.gbr
diptrace/mainboard_Bottom.gbr
diptrace/mainboard_BottomMask.gbr
diptrace/keyboard_BottomMask.gbr
diptrace/panel_Bottom.gbr
diptrace/keyboard_BoardOutline.gbr
diptrace/panel_BottomSilk.gbr
diptrace/panel_BottomMask.gbr
diptrace/mainboard_TopSilk.gbr
zuken-emulated/Gerber/MetalMask-A.fph
zuken-emulated/Gerber/MetalMask-B.fph
zuken-emulated/Gerber/Symbol-A.fph
zuken-emulated/Gerber/Symbol-B.fph
zuken-emulated/Gerber/Resist-A.fph
zuken-emulated/Gerber/Resist-B.fph
zuken-emulated/Gerber/Conductive-1.fph
zuken-emulated/Gerber/Conductive-2.fph
'''.splitlines() if l ]
MIN_REFERENCE_FILES = [
'example_two_square_boxes.gbr',
'example_outline_with_arcs.gbr',
'example_flash_circle.gbr',
'example_flash_polygon.gbr',
'example_flash_rectangle.gbr',
'example_simple_contour.gbr',
'example_am_exposure_modifier.gbr',
'bottom_copper.GBL',
'bottom_silk.GBO',
'eagle_files/copper_bottom_l4.gbr'
]
HAS_ZERO_SIZE_APERTURES = [
'bottom_copper.GBL',
'bottom_silk.GBO',
'top_copper.GTL',
'top_silk.GTO',
'board_outline.GKO',
'silkscreen_top.gbr',
'combined.GKO',
'combined.gto',
'EtchLayerTop.gdo',
'EtchLayerBottom.gdo',
'BoardOutlline.gdo',
]
@filter_syntax_warnings
@pytest.mark.parametrize('reference', REFERENCE_FILES, indirect=True)
def test_round_trip(reference, tmpfile):
tmp_gbr = tmpfile('Output gerber', '.gbr')
GerberFile.open(reference).save(tmp_gbr)
mean, _max, hist = gerber_difference(reference, tmp_gbr, diff_out=tmpfile('Difference', '.png'))
assert mean < 5e-5
assert hist[9] == 0
assert hist[3:].sum() < 5e-5*hist.size
@filter_syntax_warnings
@pytest.mark.parametrize('reference', REFERENCE_FILES, indirect=True)
def test_idempotence(reference, tmpfile):
tmp_gbr_1 = tmpfile('First generation output', '.gbr')
tmp_gbr_2 = tmpfile('Second generation output', '.gbr')
GerberFile.open(reference).save(tmp_gbr_1)
GerberFile.open(tmp_gbr_1).save(tmp_gbr_2)
assert tmp_gbr_1.read_text() == tmp_gbr_2.read_text()
TEST_ANGLES = [90, 180, 270, 1.5, 30, 360, 1024, -30]
TEST_OFFSETS = [(0, 0), (100, 0), (0, 100), (2, 0), (10, 100)]
@filter_syntax_warnings
@pytest.mark.parametrize('reference', MIN_REFERENCE_FILES, indirect=True)
@pytest.mark.parametrize('angle', TEST_ANGLES)
def test_rotation(reference, angle, tmpfile):
if 'flash_rectangle' in str(reference) and angle == 1024:
# gerbv's rendering of this is broken, the hole is missing.
pytest.skip()
tmp_gbr = tmpfile('Output gerber', '.gbr')
f = GerberFile.open(reference)
f.rotate(math.radians(angle))
f.save(tmp_gbr)
cx, cy = 0, to_gerbv_svg_units(10, unit='inch')
mean, _max, hist = gerber_difference(reference, tmp_gbr, diff_out=tmpfile('Difference', '.png'),
svg_transform=f'rotate({angle} {cx} {cy})')
assert mean < 1e-3 # relax mean criterion compared to above.
assert hist[9] == 0
@filter_syntax_warnings
@pytest.mark.parametrize('reference', MIN_REFERENCE_FILES, indirect=True)
@pytest.mark.parametrize('angle', TEST_ANGLES)
@pytest.mark.parametrize('center', [(0, 0), (10, 0), (0, -10), (10, 20)])
def test_rotation_center(reference, angle, center, tmpfile):
if 'flash_rectangle' in str(reference) and angle in (30, 1024):
# gerbv's rendering of this is broken, the hole is missing.
pytest.skip()
tmp_gbr = tmpfile('Output gerber', '.gbr')
f = GerberFile.open(reference)
f.rotate(math.radians(angle), center=center)
f.save(tmp_gbr)
# calculate circle center in SVG coordinates
size = (10, 10) # inches
cx, cy = to_gerbv_svg_units(center[0]), to_gerbv_svg_units(size[1], 'inch')-to_gerbv_svg_units(center[1], 'mm')
mean, _max, hist = gerber_difference(reference, tmp_gbr, diff_out=tmpfile('Difference', '.png'),
svg_transform=f'rotate({angle} {cx} {cy})',
size=size)
assert mean < 1e-3
assert hist[9] < 50
assert hist[3:].sum() < 1e-3*hist.size
@filter_syntax_warnings
@pytest.mark.parametrize('reference', MIN_REFERENCE_FILES, indirect=True)
@pytest.mark.parametrize('offset', TEST_OFFSETS)
def test_offset(reference, offset, tmpfile):
tmp_gbr = tmpfile('Output gerber', '.gbr')
f = GerberFile.open(reference)
f.offset(*offset)
f.save(tmp_gbr, settings=FileSettings(unit=f.unit, number_format=(4,7)))
# flip y offset since svg's y axis is flipped compared to that of gerber
dx, dy = to_gerbv_svg_units(offset[0]), -to_gerbv_svg_units(offset[1])
mean, _max, hist = gerber_difference(reference, tmp_gbr, diff_out=tmpfile('Difference', '.png'),
svg_transform=f'translate({dx} {dy})')
assert mean < 1e-4
assert hist[9] == 0
@filter_syntax_warnings
@pytest.mark.parametrize('reference', MIN_REFERENCE_FILES, indirect=True)
@pytest.mark.parametrize('angle', TEST_ANGLES)
@pytest.mark.parametrize('center', [(0, 0), (10, 0), (0, -10), (10, 20)])
@pytest.mark.parametrize('offset', [(0, 0), (100, 0), (0, 100), (100, 10)])
def test_combined(reference, angle, center, offset, tmpfile):
if 'flash_rectangle' in str(reference) and angle in (30, 1024):
# gerbv's rendering of this is broken, the hole is missing.
pytest.skip()
tmp_gbr = tmpfile('Output gerber', '.gbr')
f = GerberFile.open(reference)
f.rotate(math.radians(angle), center=center)
f.offset(*offset)
f.save(tmp_gbr, settings=FileSettings(unit=f.unit, number_format=(4,7)))
size = (10, 10) # inches
cx, cy = to_gerbv_svg_units(center[0]), to_gerbv_svg_units(size[1], 'inch')-to_gerbv_svg_units(center[1], 'mm')
dx, dy = to_gerbv_svg_units(offset[0]), -to_gerbv_svg_units(offset[1])
mean, _max, hist = gerber_difference(reference, tmp_gbr, diff_out=tmpfile('Difference', '.png'),
svg_transform=f'translate({dx} {dy}) rotate({angle} {cx} {cy})',
size=size)
assert mean < 1e-3
assert hist[9] < 100
assert hist[3:].sum() < 1e-3*hist.size
@filter_syntax_warnings
@pytest.mark.parametrize('file_a', MIN_REFERENCE_FILES)
@pytest.mark.parametrize('file_b', [
'example_two_square_boxes.gbr',
'example_outline_with_arcs.gbr',
'example_am_exposure_modifier.gbr',
'bottom_silk.GBO',
'eagle_files/copper_bottom_l4.gbr', ])
@pytest.mark.parametrize('angle', [0, 10, 90])
@pytest.mark.parametrize('offset', [(0, 0, 0, 0), (100, 0, 0, 0), (0, 0, 0, 100), (100, 0, 0, 100)])
def test_compositing(file_a, file_b, angle, offset, tmpfile, print_on_error):
# TODO bottom_silk.GBO renders incorrectly with gerbv: the outline does not exist in svg. In GUI, the logo only
# renders at very high magnification. Skip, and once we have our own SVG export maybe use that instead. Or just use
# KiCAD's gerbview.
# TODO check if this and the issue with aperture holes not rendering in test_combined actually are bugs in gerbv
# and fix/report upstream.
if file_a == 'bottom_silk.GBO' or file_b == 'bottom_silk.GBO':
pytest.skip()
ref_a = reference_path(file_a)
print_on_error('Reference file a:', ref_a)
ref_b = reference_path(file_b)
print_on_error('Reference file b:', ref_b)
ax, ay, bx, by = offset
grb_a = GerberFile.open(ref_a)
grb_a.rotate(math.radians(angle))
grb_a.offset(ax, ay)
grb_b = GerberFile.open(ref_b)
grb_b.offset(bx, by)
grb_a.merge(grb_b)
tmp_gbr = tmpfile('Output gerber', '.gbr')
grb_a.save(tmp_gbr, settings=FileSettings(unit=grb_a.unit, number_format=(4,7)))
size = (10, 10) # inches
ax, ay = to_gerbv_svg_units(ax), -to_gerbv_svg_units(ay)
bx, by = to_gerbv_svg_units(bx), -to_gerbv_svg_units(by)
# note that we have to specify cx, cy even if we rotate around the origin since gerber's origin lies at (x=0
# y=+document size) in SVG's coordinate space because svg's y axis is flipped compared to gerber's.
cx, cy = 0, to_gerbv_svg_units(size[1], 'inch')
mean, _max, hist = gerber_difference_merge(ref_a, ref_b, tmp_gbr,
composite_out=tmpfile('Composite', '.svg'), diff_out=tmpfile('Difference', '.png'),
svg_transform1=f'translate({ax} {ay}) rotate({angle} {cx} {cy})',
svg_transform2=f'translate({bx} {by})',
size=size)
assert mean < 1e-3
assert hist[9] < 100
assert hist[3:].sum() < 1e-3*hist.size
@filter_syntax_warnings
@pytest.mark.parametrize('reference', REFERENCE_FILES, indirect=True)
def test_svg_export_gerber(reference, tmpfile):
if reference.name in ('silkscreen_bottom.gbr', 'silkscreen_top.gbr', 'top_silk.GTO'):
# Some weird svg rendering artifact. Might be caused by mismatching svg units between gerbv and us. Result looks
# fine though.
pytest.skip()
if reference.name == 'MinnowMax_assy.art':
# This leads to worst-case performance in resvg, this testcase takes over 1h to finish. So skip.
pytest.skip()
grb = GerberFile.open(reference)
bounds = (0.0, 0.0), (6.0, 6.0) # bottom left, top right
out_svg = tmpfile('Output', '.svg')
with open(out_svg, 'w') as f:
f.write(str(grb.to_svg(force_bounds=bounds, arg_unit='inch', fg='black', bg='white')))
# NOTE: Instead of having gerbv directly export a PNG, we ask gerbv to output SVG which we then rasterize using
# resvg. We have to do this since gerbv's built-in cairo-based PNG export has severe aliasing issues. In contrast,
# using resvg for both allows an apples-to-apples comparison of both results.
ref_svg = tmpfile('Reference export', '.svg')
ref_png = tmpfile('Reference render', '.png')
gerbv_export(reference, ref_svg, origin=bounds[0], size=bounds[1], fg='#000000', bg='#ffffff')
with svg_soup(ref_svg) as soup:
cleanup_gerbv_svg(soup)
svg_to_png(ref_svg, ref_png, dpi=300, bg='white')
out_png = tmpfile('Output render', '.png')
svg_to_png(out_svg, out_png, dpi=300, bg='white')
if reference.name in HAS_ZERO_SIZE_APERTURES:
# gerbv does not render these correctly.
return
mean, _max, hist = image_difference(ref_png, out_png, diff_out=tmpfile('Difference', '.png'))
assert hist[9] < 1
if 'Minnow' in reference.name or 'LimeSDR' in reference.name or '80101_0125_F200' in reference.name:
# This is a dense design with lots of traces, leading to lots of aliasing artifacts.
assert mean < 10e-3
assert hist[4:].sum() < 1e-2*hist.size
else:
assert mean < 1.2e-3
assert hist[3:].sum() < 1e-3*hist.size
# FIXME test svg margin, bounding box computation
@filter_syntax_warnings
@pytest.mark.parametrize('reference', REFERENCE_FILES, indirect=True)
def test_bounding_box(reference, tmpfile):
if reference.name == 'MinnowMax_assy.art':
# This leads to worst-case performance in resvg, this testcase takes over 1h to finish. So skip.
pytest.skip()
# skip this check on files that contain lines with a zero-size aperture at the board edge
if any(reference.match(f'*/{f}') for f in HAS_ZERO_SIZE_APERTURES):
pytest.skip()
margin = 1.0 # inch
dpi = 200
margin_px = int(dpi*margin) # intentionally round down to avoid aliasing artifacts
grb = GerberFile.open(reference)
if grb.is_empty:
pytest.skip()
out_svg = tmpfile('Output', '.svg')
with open(out_svg, 'w') as f:
f.write(str(grb.to_svg(margin=margin, arg_unit='inch', fg='white', bg='black')))
out_png = tmpfile('Render', '.png')
svg_to_png(out_svg, out_png, dpi=dpi)
img = np.array(Image.open(out_png))
img = img[:, :, :3].mean(axis=2) # drop alpha and convert to grayscale
img = np.round(img).astype(int) # convert to int
assert (img > 0).any() # there must be some content, none of the test gerbers are completely empty.
cols = img.sum(axis=1)
rows = img.sum(axis=0)
col_prefix, col_suffix = np.argmax(cols > 0), np.argmax(cols[::-1] > 0)
row_prefix, row_suffix = np.argmax(rows > 0), np.argmax(rows[::-1] > 0)
print('cols:', col_prefix, col_suffix)
print('rows:', row_prefix, row_suffix)
# Check that all margins are completely black and that the content touches the margins. Allow for some tolerance to
# allow for antialiasing artifacts and for things like very thin features.
assert margin_px-2 <= col_prefix <= margin_px+2
assert margin_px-2 <= col_suffix <= margin_px+2
assert margin_px-2 <= row_prefix <= margin_px+2
assert margin_px-2 <= row_suffix <= margin_px+2
@filter_syntax_warnings
def test_syntax_error():
ref = reference_path('test_syntax_error.gbr')
with pytest.raises(SyntaxError) as exc_info:
GerberFile.open(ref)
assert 'test_syntax_error.gbr' in exc_info.value.msg
assert '7' in exc_info.value.msg # lineno