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https://github.com/python-pillow/Pillow.git
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274 lines
8.9 KiB
Python
274 lines
8.9 KiB
Python
import io
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import os
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import os.path
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import tempfile
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import time
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import pytest
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from PIL import Image, PdfParser
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from .helper import PillowTestCase, hopper
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class TestFilePdf(PillowTestCase):
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def helper_save_as_pdf(self, mode, **kwargs):
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# Arrange
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im = hopper(mode)
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outfile = self.tempfile("temp_" + mode + ".pdf")
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# Act
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im.save(outfile, **kwargs)
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# Assert
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assert os.path.isfile(outfile)
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assert os.path.getsize(outfile) > 0
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with PdfParser.PdfParser(outfile) as pdf:
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if kwargs.get("append_images", False) or kwargs.get("append", False):
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assert len(pdf.pages) > 1
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else:
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assert len(pdf.pages) > 0
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with open(outfile, "rb") as fp:
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contents = fp.read()
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size = tuple(
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int(d)
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for d in contents.split(b"/MediaBox [ 0 0 ")[1].split(b"]")[0].split()
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)
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assert im.size == size
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return outfile
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def test_monochrome(self):
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# Arrange
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mode = "1"
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# Act / Assert
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self.helper_save_as_pdf(mode)
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def test_greyscale(self):
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# Arrange
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mode = "L"
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# Act / Assert
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self.helper_save_as_pdf(mode)
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def test_rgb(self):
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# Arrange
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mode = "RGB"
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# Act / Assert
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self.helper_save_as_pdf(mode)
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def test_p_mode(self):
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# Arrange
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mode = "P"
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# Act / Assert
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self.helper_save_as_pdf(mode)
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def test_cmyk_mode(self):
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# Arrange
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mode = "CMYK"
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# Act / Assert
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self.helper_save_as_pdf(mode)
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def test_unsupported_mode(self):
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im = hopper("LA")
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outfile = self.tempfile("temp_LA.pdf")
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with pytest.raises(ValueError):
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im.save(outfile)
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def test_save_all(self):
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# Single frame image
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self.helper_save_as_pdf("RGB", save_all=True)
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# Multiframe image
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with Image.open("Tests/images/dispose_bgnd.gif") as im:
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outfile = self.tempfile("temp.pdf")
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im.save(outfile, save_all=True)
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assert os.path.isfile(outfile)
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assert os.path.getsize(outfile) > 0
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# Append images
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ims = [hopper()]
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im.copy().save(outfile, save_all=True, append_images=ims)
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assert os.path.isfile(outfile)
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assert os.path.getsize(outfile) > 0
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# Test appending using a generator
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def imGenerator(ims):
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yield from ims
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im.save(outfile, save_all=True, append_images=imGenerator(ims))
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assert os.path.isfile(outfile)
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assert os.path.getsize(outfile) > 0
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# Append JPEG images
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with Image.open("Tests/images/flower.jpg") as jpeg:
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jpeg.save(outfile, save_all=True, append_images=[jpeg.copy()])
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assert os.path.isfile(outfile)
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assert os.path.getsize(outfile) > 0
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def test_multiframe_normal_save(self):
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# Test saving a multiframe image without save_all
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with Image.open("Tests/images/dispose_bgnd.gif") as im:
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outfile = self.tempfile("temp.pdf")
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im.save(outfile)
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assert os.path.isfile(outfile)
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assert os.path.getsize(outfile) > 0
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def test_pdf_open(self):
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# fail on a buffer full of null bytes
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with pytest.raises(PdfParser.PdfFormatError):
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PdfParser.PdfParser(buf=bytearray(65536))
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# make an empty PDF object
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with PdfParser.PdfParser() as empty_pdf:
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assert len(empty_pdf.pages) == 0
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assert len(empty_pdf.info) == 0
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assert not empty_pdf.should_close_buf
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assert not empty_pdf.should_close_file
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# make a PDF file
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pdf_filename = self.helper_save_as_pdf("RGB")
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# open the PDF file
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with PdfParser.PdfParser(filename=pdf_filename) as hopper_pdf:
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assert len(hopper_pdf.pages) == 1
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assert hopper_pdf.should_close_buf
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assert hopper_pdf.should_close_file
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# read a PDF file from a buffer with a non-zero offset
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with open(pdf_filename, "rb") as f:
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content = b"xyzzy" + f.read()
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with PdfParser.PdfParser(buf=content, start_offset=5) as hopper_pdf:
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assert len(hopper_pdf.pages) == 1
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assert not hopper_pdf.should_close_buf
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assert not hopper_pdf.should_close_file
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# read a PDF file from an already open file
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with open(pdf_filename, "rb") as f:
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with PdfParser.PdfParser(f=f) as hopper_pdf:
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assert len(hopper_pdf.pages) == 1
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assert hopper_pdf.should_close_buf
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assert not hopper_pdf.should_close_file
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def test_pdf_append_fails_on_nonexistent_file(self):
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im = hopper("RGB")
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with tempfile.TemporaryDirectory() as temp_dir:
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with pytest.raises(IOError):
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im.save(os.path.join(temp_dir, "nonexistent.pdf"), append=True)
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def check_pdf_pages_consistency(self, pdf):
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pages_info = pdf.read_indirect(pdf.pages_ref)
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assert b"Parent" not in pages_info
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assert b"Kids" in pages_info
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kids_not_used = pages_info[b"Kids"]
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for page_ref in pdf.pages:
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while True:
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if page_ref in kids_not_used:
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kids_not_used.remove(page_ref)
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page_info = pdf.read_indirect(page_ref)
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assert b"Parent" in page_info
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page_ref = page_info[b"Parent"]
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if page_ref == pdf.pages_ref:
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break
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assert pdf.pages_ref == page_info[b"Parent"]
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assert kids_not_used == []
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def test_pdf_append(self):
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# make a PDF file
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pdf_filename = self.helper_save_as_pdf("RGB", producer="PdfParser")
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# open it, check pages and info
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with PdfParser.PdfParser(pdf_filename, mode="r+b") as pdf:
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assert len(pdf.pages) == 1
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assert len(pdf.info) == 4
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assert pdf.info.Title == os.path.splitext(os.path.basename(pdf_filename))[0]
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assert pdf.info.Producer == "PdfParser"
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assert b"CreationDate" in pdf.info
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assert b"ModDate" in pdf.info
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self.check_pdf_pages_consistency(pdf)
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# append some info
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pdf.info.Title = "abc"
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pdf.info.Author = "def"
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pdf.info.Subject = "ghi\uABCD"
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pdf.info.Keywords = "qw)e\\r(ty"
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pdf.info.Creator = "hopper()"
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pdf.start_writing()
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pdf.write_xref_and_trailer()
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# open it again, check pages and info again
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with PdfParser.PdfParser(pdf_filename) as pdf:
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assert len(pdf.pages) == 1
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assert len(pdf.info) == 8
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assert pdf.info.Title == "abc"
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assert b"CreationDate" in pdf.info
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assert b"ModDate" in pdf.info
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self.check_pdf_pages_consistency(pdf)
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# append two images
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mode_CMYK = hopper("CMYK")
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mode_P = hopper("P")
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mode_CMYK.save(pdf_filename, append=True, save_all=True, append_images=[mode_P])
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# open the PDF again, check pages and info again
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with PdfParser.PdfParser(pdf_filename) as pdf:
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assert len(pdf.pages) == 3
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assert len(pdf.info) == 8
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assert PdfParser.decode_text(pdf.info[b"Title"]) == "abc"
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assert pdf.info.Title == "abc"
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assert pdf.info.Producer == "PdfParser"
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assert pdf.info.Keywords == "qw)e\\r(ty"
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assert pdf.info.Subject == "ghi\uABCD"
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assert b"CreationDate" in pdf.info
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assert b"ModDate" in pdf.info
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self.check_pdf_pages_consistency(pdf)
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def test_pdf_info(self):
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# make a PDF file
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pdf_filename = self.helper_save_as_pdf(
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"RGB",
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title="title",
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author="author",
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subject="subject",
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keywords="keywords",
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creator="creator",
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producer="producer",
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creationDate=time.strptime("2000", "%Y"),
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modDate=time.strptime("2001", "%Y"),
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)
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# open it, check pages and info
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with PdfParser.PdfParser(pdf_filename) as pdf:
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assert len(pdf.info) == 8
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assert pdf.info.Title == "title"
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assert pdf.info.Author == "author"
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assert pdf.info.Subject == "subject"
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assert pdf.info.Keywords == "keywords"
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assert pdf.info.Creator == "creator"
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assert pdf.info.Producer == "producer"
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assert pdf.info.CreationDate == time.strptime("2000", "%Y")
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assert pdf.info.ModDate == time.strptime("2001", "%Y")
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self.check_pdf_pages_consistency(pdf)
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def test_pdf_append_to_bytesio(self):
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im = hopper("RGB")
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f = io.BytesIO()
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im.save(f, format="PDF")
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initial_size = len(f.getvalue())
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assert initial_size > 0
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im = hopper("P")
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f = io.BytesIO(f.getvalue())
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im.save(f, format="PDF", append=True)
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assert len(f.getvalue()) > initial_size
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