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https://github.com/ocrmypdf/OCRmyPDF.git
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82 lines
2.5 KiB
Python
82 lines
2.5 KiB
Python
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# © 2019 James R. Barlow: github.com/jbarlow83
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#
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# This file is part of OCRmyPDF.
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#
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# OCRmyPDF is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# OCRmyPDF is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with OCRmyPDF. If not, see <http://www.gnu.org/licenses/>.
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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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@pytest.fixture
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def linn(resources):
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path = resources / 'linn.pdf'
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return path, pikepdf.open(path)
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def test_rasterize_size(linn, outdir, caplog):
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path, pdf = linn
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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('200.0'), Decimal('150.0')
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target_dpi = 42.0, 4242.0
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log = logging.getLogger()
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rasterize_pdf(
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path,
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outdir / 'out.png',
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target_size[0] / page_size[0],
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target_size[1] / page_size[1],
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raster_device='pngmono',
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log=log,
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page_dpi=target_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'] == target_dpi
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def test_rasterize_rotated(linn, outdir, caplog):
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path, pdf = linn
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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('200.0'), Decimal('150.0')
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target_dpi = 42.0, 4242.0
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log = logging.getLogger()
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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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target_size[0] / page_size[0],
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target_size[1] / page_size[1],
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raster_device='pngmono',
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log=log,
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page_dpi=target_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'] == (target_dpi[1], target_dpi[0])
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