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127 lines
3.7 KiB
Python
127 lines
3.7 KiB
Python
# © 2019 James R. Barlow: github.com/jbarlow83
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#
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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import logging
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from decimal import Decimal
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import pikepdf
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import pytest
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from PIL import Image
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from ocrmypdf._exec.ghostscript import rasterize_pdf
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from ocrmypdf.exceptions import ExitCode
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from ocrmypdf.helpers import Resolution
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from .conftest import check_ocrmypdf, run_ocrmypdf, run_ocrmypdf_api
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# pylint: disable=redefined-outer-name
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@pytest.fixture
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def francais(resources):
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path = resources / 'francais.pdf'
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return path, pikepdf.open(path)
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def test_rasterize_size(francais, outdir):
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path, pdf = francais
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page_size_pts = (pdf.pages[0].MediaBox[2], pdf.pages[0].MediaBox[3])
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assert pdf.pages[0].MediaBox[0] == pdf.pages[0].MediaBox[1] == 0
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page_size = (page_size_pts[0] / Decimal(72), page_size_pts[1] / Decimal(72))
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target_size = Decimal('50.0'), Decimal('30.0')
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forced_dpi = Resolution(42.0, 4242.0)
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rasterize_pdf(
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path,
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outdir / 'out.png',
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raster_device='pngmono',
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raster_dpi=Resolution(
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target_size[0] / page_size[0], target_size[1] / page_size[1]
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),
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page_dpi=forced_dpi,
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)
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with Image.open(outdir / 'out.png') as im:
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assert im.size == target_size
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assert im.info['dpi'] == forced_dpi
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def test_rasterize_rotated(francais, outdir, caplog):
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path, pdf = francais
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page_size_pts = (pdf.pages[0].MediaBox[2], pdf.pages[0].MediaBox[3])
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assert pdf.pages[0].MediaBox[0] == pdf.pages[0].MediaBox[1] == 0
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page_size = (page_size_pts[0] / Decimal(72), page_size_pts[1] / Decimal(72))
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target_size = Decimal('50.0'), Decimal('30.0')
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forced_dpi = Resolution(42.0, 4242.0)
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caplog.set_level(logging.DEBUG)
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rasterize_pdf(
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path,
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outdir / 'out.png',
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raster_device='pngmono',
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raster_dpi=Resolution(
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target_size[0] / page_size[0], target_size[1] / page_size[1]
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),
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page_dpi=forced_dpi,
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rotation=90,
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)
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with Image.open(outdir / 'out.png') as im:
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assert im.size == (target_size[1], target_size[0])
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assert im.info['dpi'] == (forced_dpi[1], forced_dpi[0])
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def test_gs_render_failure(resources, outpdf):
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p, _out, err = run_ocrmypdf(
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resources / 'blank.pdf',
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outpdf,
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'--plugin',
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'tests/plugins/tesseract_noop.py',
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'--plugin',
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'tests/plugins/gs_render_failure.py',
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)
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assert 'Casper is not a friendly ghost' in err
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assert p.returncode == ExitCode.child_process_error
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def test_gs_raster_failure(resources, outpdf):
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p, _out, err = run_ocrmypdf(
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resources / 'francais.pdf',
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outpdf,
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'--plugin',
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'tests/plugins/tesseract_noop.py',
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'--plugin',
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'tests/plugins/gs_raster_failure.py',
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)
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assert 'Ghost story archive not found' in err
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assert p.returncode == ExitCode.child_process_error
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def test_ghostscript_pdfa_failure(resources, outpdf):
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p, _out, _err = run_ocrmypdf(
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resources / 'francais.pdf',
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outpdf,
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'--plugin',
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'tests/plugins/tesseract_noop.py',
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'--plugin',
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'tests/plugins/gs_pdfa_failure.py',
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)
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assert (
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p.returncode == ExitCode.pdfa_conversion_failed
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), "Unexpected return when PDF/A fails"
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def test_ghostscript_feature_elision(resources, outpdf):
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check_ocrmypdf(
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resources / 'francais.pdf',
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outpdf,
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'--plugin',
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'tests/plugins/tesseract_noop.py',
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'--plugin',
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'tests/plugins/gs_feature_elision.py',
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)
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