mirror of
https://github.com/ocrmypdf/OCRmyPDF.git
synced 2025-11-28 08:02:10 +00:00
23c95e9660
It looks like GS 9.19 can incorrectly set overprinting for the text layer even though this makes no sense in PDF/A, or at least someone produced PDFs that have this after a Tesseract PDF -> GS PDF/A conversion. GS 9.20 complains about this. Instead of aborting, elide the feature. See http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=094d5a1880f1cb9ed320ca9353eb69436e09b594 and issue #107. It looks like it is better to elide features and warn about elision rather than abort with an error.
65 lines
2.0 KiB
Python
65 lines
2.0 KiB
Python
#!/usr/bin/env python3
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# © 2015 James R. Barlow: github.com/jbarlow83
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from tempfile import NamedTemporaryFile
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from subprocess import Popen, PIPE, check_call
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from shutil import copy
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from . import get_program
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from .pdfa import SRGB_ICC_PROFILE
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def rasterize_pdf(input_file, output_file, xres, yres, raster_device, log,
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pageno=1):
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with NamedTemporaryFile(delete=True) as tmp:
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args_gs = [
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get_program('gs'),
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'-dQUIET',
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'-dSAFER',
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'-dBATCH',
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'-dNOPAUSE',
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'-sDEVICE=%s' % raster_device,
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'-dFirstPage=%i' % pageno,
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'-dLastPage=%i' % pageno,
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'-o', tmp.name,
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'-r{0}x{1}'.format(str(round(xres)), str(round(yres))),
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input_file
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]
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p = Popen(args_gs, close_fds=True, stdout=PIPE, stderr=PIPE,
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universal_newlines=True)
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stdout, stderr = p.communicate()
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if stdout:
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if 'error' in stdout:
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log.error(stdout) # Ghostscript puts errors in stdout
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else:
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log.debug(stdout)
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if stderr:
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log.error(stderr)
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if p.returncode == 0:
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copy(tmp.name, output_file)
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else:
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log.error('Ghostscript rendering failed')
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def generate_pdfa(pdf_pages, output_file, threads=1):
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with NamedTemporaryFile(delete=True) as gs_pdf:
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args_gs = [
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get_program("gs"),
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"-dQUIET",
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"-dBATCH",
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"-dNOPAUSE",
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'-dNumRenderingThreads=' + str(threads),
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"-sDEVICE=pdfwrite",
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"-dAutoRotatePages=/None",
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"-sColorConversionStrategy=/RGB",
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"-sProcessColorModel=DeviceRGB",
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"-dJPEGQ=95",
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"-dPDFA=2",
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"-sPDFACompatibilityPolicy=1",
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"-sOutputFile=" + gs_pdf.name,
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]
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args_gs.extend(pdf_pages)
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check_call(args_gs)
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copy(gs_pdf.name, output_file)
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