Remove leptonica and cffi

tests/test_lept.py

@@ -1,96 +0,0 @@
-# © 2018 James R. Barlow: github.com/jbarlow83
-#
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-
-from os import fspath
-from pickle import dumps, loads
-
-import pytest
-from PIL import Image, ImageChops
-
-from ocrmypdf import leptonica as lp
-
-
-def test_colormap_backgroundnorm(resources):
-    # Issue #262 - unclear how to reproduce exactly, so just ensure leptonica
-    # can handle that case
-    pix = lp.Pix.open(resources / 'baiona_colormapped.png')
-    pix.background_norm()
-
-
-@pytest.fixture
-def crom_pix(resources):
-    pix = lp.Pix.open(resources / 'crom.png')
-    im = Image.open(resources / 'crom.png')
-    yield pix, im
-    im.close()
-
-
-def test_pix_basic(crom_pix):
-    pix, im = crom_pix
-
-    assert pix.width == im.width
-    assert pix.height == im.height
-    assert pix.mode == im.mode
-
-
-def test_pil_conversion(crom_pix):
-    pix, im = crom_pix
-
-    # Check for pixel perfect
-    assert ImageChops.difference(pix.topil(), im).getbbox() is None
-
-
-def test_pix_otsu(crom_pix):
-    pix, _ = crom_pix
-    im1bpp = pix.otsu_adaptive_threshold()
-    assert im1bpp.mode == '1'
-
-
-@pytest.mark.skipif(
-    lp.get_leptonica_version() < 'leptonica-1.76',
-    reason="needs new leptonica for API change",
-)
-def test_crop(resources):
-    pix = lp.Pix.open(resources / 'linn.png')
-    foreground = pix.crop_to_foreground()
-    assert foreground.width < pix.width
-
-
-def test_clean_bg(resources):
-    pix = lp.Pix.open(resources / 'congress.jpg')
-    imbg = pix.clean_background_to_white()
-
-
-def test_pickle(crom_pix):
-    pix, _ = crom_pix
-    pickled = dumps(pix)
-    pix2 = loads(pickled)
-    assert pix.mode == pix2.mode
-
-
-def test_leptonica_compile(tmp_path):
-    from ocrmypdf.lib.compile_leptonica import ffibuilder
-
-    # Compile the library but build it somewhere that won't interfere with
-    # existing compiled library. Also compile in API mode so that we test
-    # the interfaces, even though we use it ABI mode.
-    ffibuilder.compile(tmpdir=fspath(tmp_path), target=fspath(tmp_path / 'lepttest.*'))
-
-
-def test_file_not_found():
-    with pytest.raises(FileNotFoundError):
-        lp.Pix.open("does_not_exist1")
-
-
-@pytest.mark.skipif(
-    lp.get_leptonica_version() < 'leptonica-1.79.0',
-    reason="test not reliable on all platforms for old leptonica",
-)
-def test_error_trap():
-    with pytest.raises(lp.LeptonicaError, match=r"Error in pixReadMem"):
-        with lp._LeptonicaErrorTrap():
-            lp.Pix(lp.lept.pixReadMem(lp.ffi.NULL, 0))

tests/test_preprocessing.py

@@ -12,7 +12,6 @@ from PIL import Image
 
 from ocrmypdf._exec import ghostscript, tesseract
 from ocrmypdf.helpers import Resolution
-from ocrmypdf.leptonica import Pix
 from ocrmypdf.pdfinfo import PdfInfo
 
 from .conftest import check_ocrmypdf, have_unpaper
@@ -24,8 +23,7 @@ def test_deskew(resources, outdir):
     # Run with deskew
     deskewed_pdf = check_ocrmypdf(resources / 'skew.pdf', outdir / 'skew.pdf', '-d')
 
-    # Now render as an image again and use Leptonica to find the skew angle
-    # to confirm that it was deskewed
+    # Now render as an image again...
     deskewed_png = outdir / 'deskewed.png'
 
     ghostscript.rasterize_pdf(
@@ -36,6 +34,7 @@ def test_deskew(resources, outdir):
         pageno=1,
     )
 
+    # ...and use Tessera to find the skew angle to confirm that it was deskewed
     skew_angle = tesseract.get_deskew(deskewed_png, [], None, 5.0)
     print(skew_angle)
     assert -0.5 < skew_angle < 0.5, "Deskewing failed"

tests/test_rotation.py

@@ -70,7 +70,7 @@ def compare_images_monochrome(
 
 
 def test_monochrome_comparison(resources, outdir):
-    # Verify leptonica: check that an incorrect rotated image has poor
+    # Self test: check that an incorrect rotated image has poor
     # comparison with reference
     cmp = compare_images_monochrome(
         outdir,