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148 lines
4.2 KiB
Python
148 lines
4.2 KiB
Python
# © 2015 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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from ocrmypdf import pdfinfo
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from reportlab.pdfgen.canvas import Canvas
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from PIL import Image
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from tempfile import NamedTemporaryFile
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from math import isclose
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from ocrmypdf.pdfinfo import Colorspace, Encoding
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from contextlib import suppress
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import os
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import shutil
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import pytest
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import img2pdf
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import pytest
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import sys
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import PyPDF2 as pypdf
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def test_single_page_text(outdir):
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filename = outdir / 'text.pdf'
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pdf = Canvas(str(filename), pagesize=(8*72, 6*72))
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text = pdf.beginText()
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text.setFont('Helvetica', 12)
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text.setTextOrigin(1*72, 3*72)
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text.textLine("Methink'st thou art a general offence and every"
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" man should beat thee.")
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pdf.drawText(text)
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pdf.showPage()
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pdf.save()
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info = pdfinfo.PdfInfo(filename)
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assert len(info) == 1
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page = info[0]
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assert page.has_text
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assert len(page.images) == 0
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def test_single_page_image(outdir):
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filename = outdir / 'image-mono.pdf'
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im_tmp = outdir / 'tmp.png'
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im = Image.new('1', (8, 8), 0)
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for n in range(8):
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im.putpixel((n, n), 1)
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im.save(str(im_tmp), format='PNG')
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imgsize = ((img2pdf.ImgSize.dpi, 8), (img2pdf.ImgSize.dpi, 8))
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layout_fun = img2pdf.get_layout_fun(None, imgsize, None, None, None)
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im_bytes = im_tmp.read_bytes()
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pdf_bytes = img2pdf.convert(
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im_bytes, producer="img2pdf", with_pdfrw=False,
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layout_fun=layout_fun)
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filename.write_bytes(pdf_bytes)
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info = pdfinfo.PdfInfo(filename)
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assert len(info) == 1
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page = info[0]
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assert not page.has_text
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assert len(page.images) == 1
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pdfimage = page.images[0]
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assert pdfimage.width == 8
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assert pdfimage.color == Colorspace.gray
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# DPI in a 1"x1" is the image width
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assert isclose(pdfimage.xres, 8)
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assert isclose(pdfimage.yres, 8)
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def test_single_page_inline_image(outdir):
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filename = outdir / 'image-mono-inline.pdf'
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pdf = Canvas(str(filename), pagesize=(8*72, 6*72))
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with NamedTemporaryFile() as im_tmp:
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im = Image.new('1', (8, 8), 0)
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for n in range(8):
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im.putpixel((n, n), 1)
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im.save(im_tmp.name, format='PNG')
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# Draw image in a 72x72 pt or 1"x1" area
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pdf.drawInlineImage(im_tmp.name, 0, 0, width=72, height=72)
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pdf.showPage()
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pdf.save()
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pdf = pdfinfo.PdfInfo(filename)
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print(pdf)
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pdfimage = pdf[0].images[0]
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assert isclose(pdfimage.xres, 8)
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assert pdfimage.color == Colorspace.rgb # reportlab produces color image
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assert pdfimage.width == 8
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def test_jpeg(resources, outdir):
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filename = resources / 'c02-22.pdf'
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pdf = pdfinfo.PdfInfo(filename)
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pdfimage = pdf[0].images[0]
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assert pdfimage.enc == Encoding.jpeg
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assert isclose(pdfimage.xres, 150)
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def test_form_xobject(resources):
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filename = resources / 'formxobject.pdf'
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pdf = pdfinfo.PdfInfo(filename)
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pdfimage = pdf[0].images[0]
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assert pdfimage.width == 50
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def test_naive_find_text(resources):
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filename = resources / 'formxobject.pdf'
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reader = pypdf.PdfFileReader(str(filename))
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page = reader.getPage(0)
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assert pdfinfo._naive_find_text(pdf=reader, page=page)
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def test_no_contents(resources):
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filename = resources / 'no_contents.pdf'
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pdf = pdfinfo.PdfInfo(filename)
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assert len(pdf[0].images) == 0
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assert pdf[0].has_text == False
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def test_oversized_page(resources):
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pdf = pdfinfo.PdfInfo(resources / 'poster.pdf')
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image = pdf[0].images[0]
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assert image.width * image.xres > 200, "this is supposed to be oversized"
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