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+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+# Author: Jan Götte <code@jaseg.de>
+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
+'''.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, 30, 1.5, 10, 360, 1024, -30, -90]
+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, -10), (10, 10), (10, 0), (0, -10), (-10, 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, 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(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')
+ 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
+