mirror of
https://github.com/python-pillow/Pillow.git
synced 2025-11-04 01:47:47 +03:00
834 lines
28 KiB
Python
834 lines
28 KiB
Python
from __future__ import annotations
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import re
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import sys
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import warnings
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import zlib
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from io import BytesIO
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from pathlib import Path
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from types import ModuleType
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from typing import Any, cast
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import pytest
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from PIL import Image, ImageFile, PngImagePlugin, features
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from .helper import (
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PillowLeakTestCase,
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assert_image,
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assert_image_equal,
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assert_image_equal_tofile,
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hopper,
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is_win32,
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mark_if_feature_version,
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skip_unless_feature,
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)
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ElementTree: ModuleType | None
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try:
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from defusedxml import ElementTree
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except ImportError:
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ElementTree = None
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# sample png stream
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TEST_PNG_FILE = "Tests/images/hopper.png"
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# stuff to create inline PNG images
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MAGIC = PngImagePlugin._MAGIC
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def chunk(cid: bytes, *data: bytes) -> bytes:
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test_file = BytesIO()
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PngImagePlugin.putchunk(test_file, cid, *data)
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return test_file.getvalue()
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o32 = PngImagePlugin.o32
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IHDR = chunk(b"IHDR", o32(1), o32(1), b"\x08\x02", b"\0\0\0")
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IDAT = chunk(b"IDAT")
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IEND = chunk(b"IEND")
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HEAD = MAGIC + IHDR
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TAIL = IDAT + IEND
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def load(data: bytes) -> Image.Image:
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return Image.open(BytesIO(data))
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def roundtrip(im: Image.Image, **options: Any) -> PngImagePlugin.PngImageFile:
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out = BytesIO()
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im.save(out, "PNG", **options)
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out.seek(0)
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return cast(PngImagePlugin.PngImageFile, Image.open(out))
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@skip_unless_feature("zlib")
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class TestFilePng:
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def get_chunks(self, filename: Path) -> list[bytes]:
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chunks = []
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with open(filename, "rb") as fp:
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fp.read(8)
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with PngImagePlugin.PngStream(fp) as png:
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while True:
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cid, pos, length = png.read()
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chunks.append(cid)
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try:
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s = png.call(cid, pos, length)
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except EOFError:
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break
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png.crc(cid, s)
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return chunks
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def test_sanity(self, tmp_path: Path) -> None:
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# internal version number
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version = features.version_codec("zlib")
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assert version is not None
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assert re.search(r"\d+(\.\d+){1,3}(\.zlib\-ng)?$", version)
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test_file = tmp_path / "temp.png"
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hopper("RGB").save(test_file)
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with Image.open(test_file) as im:
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im.load()
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assert im.mode == "RGB"
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assert im.size == (128, 128)
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assert im.format == "PNG"
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assert im.get_format_mimetype() == "image/png"
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for mode in ["1", "L", "P", "RGB", "I;16", "I;16B"]:
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im = hopper(mode)
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im.save(test_file)
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with Image.open(test_file) as reloaded:
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if mode == "I;16B":
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reloaded = reloaded.convert(mode)
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assert_image_equal(reloaded, im)
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def test_invalid_file(self) -> None:
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invalid_file = "Tests/images/flower.jpg"
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with pytest.raises(SyntaxError):
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PngImagePlugin.PngImageFile(invalid_file)
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def test_broken(self) -> None:
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# Check reading of totally broken files. In this case, the test
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# file was checked into Subversion as a text file.
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test_file = "Tests/images/broken.png"
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with pytest.raises(OSError):
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with Image.open(test_file):
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pass
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def test_bad_text(self) -> None:
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# Make sure PIL can read malformed tEXt chunks (@PIL152)
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im = load(HEAD + chunk(b"tEXt") + TAIL)
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assert im.info == {}
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im = load(HEAD + chunk(b"tEXt", b"spam") + TAIL)
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assert im.info == {"spam": ""}
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im = load(HEAD + chunk(b"tEXt", b"spam\0") + TAIL)
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assert im.info == {"spam": ""}
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im = load(HEAD + chunk(b"tEXt", b"spam\0egg") + TAIL)
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assert im.info == {"spam": "egg"}
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im = load(HEAD + chunk(b"tEXt", b"spam\0egg\0") + TAIL)
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assert im.info == {"spam": "egg\x00"}
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def test_bad_ztxt(self) -> None:
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# Test reading malformed zTXt chunks (python-pillow/Pillow#318)
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im = load(HEAD + chunk(b"zTXt") + TAIL)
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assert im.info == {}
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im = load(HEAD + chunk(b"zTXt", b"spam") + TAIL)
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assert im.info == {"spam": ""}
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im = load(HEAD + chunk(b"zTXt", b"spam\0") + TAIL)
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assert im.info == {"spam": ""}
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im = load(HEAD + chunk(b"zTXt", b"spam\0\0") + TAIL)
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assert im.info == {"spam": ""}
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im = load(HEAD + chunk(b"zTXt", b"spam\0\0" + zlib.compress(b"egg")[:1]) + TAIL)
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assert im.info == {"spam": ""}
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im = load(HEAD + chunk(b"zTXt", b"spam\0\0" + zlib.compress(b"egg")) + TAIL)
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assert im.info == {"spam": "egg"}
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def test_bad_itxt(self) -> None:
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im = load(HEAD + chunk(b"iTXt") + TAIL)
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assert im.info == {}
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im = load(HEAD + chunk(b"iTXt", b"spam") + TAIL)
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assert im.info == {}
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im = load(HEAD + chunk(b"iTXt", b"spam\0") + TAIL)
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assert im.info == {}
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im = load(HEAD + chunk(b"iTXt", b"spam\0\x02") + TAIL)
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assert im.info == {}
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im = load(HEAD + chunk(b"iTXt", b"spam\0\0\0foo\0") + TAIL)
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assert im.info == {}
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im = load(HEAD + chunk(b"iTXt", b"spam\0\0\0en\0Spam\0egg") + TAIL)
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assert im.info == {"spam": "egg"}
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assert im.info["spam"].lang == "en"
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assert im.info["spam"].tkey == "Spam"
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im = load(
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HEAD
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+ chunk(b"iTXt", b"spam\0\1\0en\0Spam\0" + zlib.compress(b"egg")[:1])
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+ TAIL
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)
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assert im.info == {"spam": ""}
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im = load(
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HEAD
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+ chunk(b"iTXt", b"spam\0\1\1en\0Spam\0" + zlib.compress(b"egg"))
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+ TAIL
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)
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assert im.info == {}
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im = load(
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HEAD
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+ chunk(b"iTXt", b"spam\0\1\0en\0Spam\0" + zlib.compress(b"egg"))
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+ TAIL
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)
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assert im.info == {"spam": "egg"}
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assert im.info["spam"].lang == "en"
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assert im.info["spam"].tkey == "Spam"
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def test_interlace(self) -> None:
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test_file = "Tests/images/pil123p.png"
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with Image.open(test_file) as im:
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assert_image(im, "P", (162, 150))
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assert im.info.get("interlace")
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im.load()
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test_file = "Tests/images/pil123rgba.png"
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with Image.open(test_file) as im:
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assert_image(im, "RGBA", (162, 150))
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assert im.info.get("interlace")
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im.load()
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def test_load_transparent_p(self) -> None:
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test_file = "Tests/images/pil123p.png"
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with Image.open(test_file) as im:
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assert_image(im, "P", (162, 150))
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im = im.convert("RGBA")
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assert_image(im, "RGBA", (162, 150))
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# image has 124 unique alpha values
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assert len(im.getchannel("A").getcolors()) == 124
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def test_load_transparent_rgb(self) -> None:
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test_file = "Tests/images/rgb_trns.png"
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with Image.open(test_file) as im:
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assert im.info["transparency"] == (0, 255, 52)
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assert_image(im, "RGB", (64, 64))
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im = im.convert("RGBA")
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assert_image(im, "RGBA", (64, 64))
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# image has 876 transparent pixels
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assert im.getchannel("A").getcolors()[0][0] == 876
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def test_save_p_transparent_palette(self, tmp_path: Path) -> None:
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in_file = "Tests/images/pil123p.png"
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with Image.open(in_file) as im:
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# 'transparency' contains a byte string with the opacity for
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# each palette entry
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assert len(im.info["transparency"]) == 256
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test_file = tmp_path / "temp.png"
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im.save(test_file)
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# check if saved image contains same transparency
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with Image.open(test_file) as im:
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assert len(im.info["transparency"]) == 256
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assert_image(im, "P", (162, 150))
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im = im.convert("RGBA")
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assert_image(im, "RGBA", (162, 150))
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# image has 124 unique alpha values
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assert len(im.getchannel("A").getcolors()) == 124
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def test_save_p_single_transparency(self, tmp_path: Path) -> None:
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in_file = "Tests/images/p_trns_single.png"
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with Image.open(in_file) as im:
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# pixel value 164 is full transparent
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assert im.info["transparency"] == 164
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assert im.getpixel((31, 31)) == 164
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test_file = tmp_path / "temp.png"
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im.save(test_file)
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# check if saved image contains same transparency
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with Image.open(test_file) as im:
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assert im.info["transparency"] == 164
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assert im.getpixel((31, 31)) == 164
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assert_image(im, "P", (64, 64))
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im = im.convert("RGBA")
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assert_image(im, "RGBA", (64, 64))
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assert im.getpixel((31, 31)) == (0, 255, 52, 0)
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# image has 876 transparent pixels
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assert im.getchannel("A").getcolors()[0][0] == 876
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def test_save_p_transparent_black(self, tmp_path: Path) -> None:
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# check if solid black image with full transparency
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# is supported (check for #1838)
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im = Image.new("RGBA", (10, 10), (0, 0, 0, 0))
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assert im.getcolors() == [(100, (0, 0, 0, 0))]
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im = im.convert("P")
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test_file = tmp_path / "temp.png"
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im.save(test_file)
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# check if saved image contains same transparency
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with Image.open(test_file) as im:
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assert len(im.info["transparency"]) == 256
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assert_image(im, "P", (10, 10))
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im = im.convert("RGBA")
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assert_image(im, "RGBA", (10, 10))
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assert im.getcolors() == [(100, (0, 0, 0, 0))]
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def test_save_grayscale_transparency(self, tmp_path: Path) -> None:
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for mode, num_transparent in {"1": 1994, "L": 559, "I;16": 559}.items():
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in_file = "Tests/images/" + mode.split(";")[0].lower() + "_trns.png"
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with Image.open(in_file) as im:
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assert im.mode == mode
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assert im.info["transparency"] == 255
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im_rgba = im.convert("RGBA")
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assert im_rgba.getchannel("A").getcolors()[0][0] == num_transparent
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test_file = tmp_path / "temp.png"
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im.save(test_file)
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with Image.open(test_file) as test_im:
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assert test_im.mode == mode
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assert test_im.info["transparency"] == 255
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assert_image_equal(im, test_im)
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test_im_rgba = test_im.convert("RGBA")
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assert test_im_rgba.getchannel("A").getcolors()[0][0] == num_transparent
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def test_save_rgb_single_transparency(self, tmp_path: Path) -> None:
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in_file = "Tests/images/caption_6_33_22.png"
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with Image.open(in_file) as im:
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test_file = tmp_path / "temp.png"
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im.save(test_file)
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def test_load_verify(self) -> None:
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# Check open/load/verify exception (@PIL150)
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with Image.open(TEST_PNG_FILE) as im:
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# Assert that there is no unclosed file warning
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with warnings.catch_warnings():
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warnings.simplefilter("error")
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im.verify()
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with Image.open(TEST_PNG_FILE) as im:
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im.load()
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with pytest.raises(RuntimeError):
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im.verify()
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def test_verify_struct_error(self) -> None:
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# Check open/load/verify exception (#1755)
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# offsets to test, -10: breaks in i32() in read. (OSError)
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# -13: breaks in crc, txt chunk.
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# -14: malformed chunk
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for offset in (-10, -13, -14):
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with open(TEST_PNG_FILE, "rb") as f:
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test_file = f.read()[:offset]
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with Image.open(BytesIO(test_file)) as im:
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assert im.fp is not None
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with pytest.raises((OSError, SyntaxError)):
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im.verify()
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def test_verify_ignores_crc_error(self, monkeypatch: pytest.MonkeyPatch) -> None:
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# check ignores crc errors in ancillary chunks
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chunk_data = chunk(b"tEXt", b"spam")
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broken_crc_chunk_data = chunk_data[:-1] + b"q" # break CRC
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image_data = HEAD + broken_crc_chunk_data + TAIL
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with pytest.raises(SyntaxError):
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PngImagePlugin.PngImageFile(BytesIO(image_data))
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monkeypatch.setattr(ImageFile, "LOAD_TRUNCATED_IMAGES", True)
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im = load(image_data)
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assert im is not None
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def test_verify_not_ignores_crc_error_in_required_chunk(
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self, monkeypatch: pytest.MonkeyPatch
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) -> None:
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# check does not ignore crc errors in required chunks
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image_data = MAGIC + IHDR[:-1] + b"q" + TAIL
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monkeypatch.setattr(ImageFile, "LOAD_TRUNCATED_IMAGES", True)
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with pytest.raises(SyntaxError):
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PngImagePlugin.PngImageFile(BytesIO(image_data))
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def test_roundtrip_dpi(self) -> None:
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# Check dpi roundtripping
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with Image.open(TEST_PNG_FILE) as im:
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im = roundtrip(im, dpi=(100.33, 100.33))
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assert im.info["dpi"] == (100.33, 100.33)
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def test_load_float_dpi(self) -> None:
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with Image.open(TEST_PNG_FILE) as im:
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assert im.info["dpi"] == (95.9866, 95.9866)
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def test_roundtrip_text(self) -> None:
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# Check text roundtripping
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with Image.open(TEST_PNG_FILE) as im:
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info = PngImagePlugin.PngInfo()
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info.add_text("TXT", "VALUE")
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info.add_text("ZIP", "VALUE", zip=True)
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im = roundtrip(im, pnginfo=info)
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assert im.info == {"TXT": "VALUE", "ZIP": "VALUE"}
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assert im.text == {"TXT": "VALUE", "ZIP": "VALUE"}
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def test_roundtrip_itxt(self) -> None:
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# Check iTXt roundtripping
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im = Image.new("RGB", (32, 32))
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info = PngImagePlugin.PngInfo()
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info.add_itxt("spam", "Eggs", "en", "Spam")
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info.add_text("eggs", PngImagePlugin.iTXt("Spam", "en", "Eggs"), zip=True)
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im = roundtrip(im, pnginfo=info)
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assert im.info == {"spam": "Eggs", "eggs": "Spam"}
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assert im.text == {"spam": "Eggs", "eggs": "Spam"}
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assert isinstance(im.text["spam"], PngImagePlugin.iTXt)
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assert im.text["spam"].lang == "en"
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assert im.text["spam"].tkey == "Spam"
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assert isinstance(im.text["eggs"], PngImagePlugin.iTXt)
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assert im.text["eggs"].lang == "en"
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assert im.text["eggs"].tkey == "Eggs"
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def test_nonunicode_text(self) -> None:
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# Check so that non-Unicode text is saved as a tEXt rather than iTXt
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im = Image.new("RGB", (32, 32))
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info = PngImagePlugin.PngInfo()
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info.add_text("Text", "Ascii")
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im = roundtrip(im, pnginfo=info)
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assert isinstance(im.info["Text"], str)
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def test_unicode_text(self) -> None:
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# Check preservation of non-ASCII characters
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def rt_text(value: str) -> None:
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im = Image.new("RGB", (32, 32))
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info = PngImagePlugin.PngInfo()
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info.add_text("Text", value)
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im = roundtrip(im, pnginfo=info)
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assert im.info == {"Text": value}
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rt_text(" Aa" + chr(0xA0) + chr(0xC4) + chr(0xFF)) # Latin1
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rt_text(chr(0x400) + chr(0x472) + chr(0x4FF)) # Cyrillic
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# CJK:
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rt_text(chr(0x4E00) + chr(0x66F0) + chr(0x9FBA) + chr(0x3042) + chr(0xAC00))
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rt_text("A" + chr(0xC4) + chr(0x472) + chr(0x3042)) # Combined
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def test_scary(self) -> None:
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# Check reading of evil PNG file. For information, see:
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# http://scary.beasts.org/security/CESA-2004-001.txt
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# The first byte is removed from pngtest_bad.png
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# to avoid classification as malware.
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with open("Tests/images/pngtest_bad.png.bin", "rb") as fd:
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data = b"\x89" + fd.read()
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pngfile = BytesIO(data)
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with pytest.raises(OSError):
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with Image.open(pngfile):
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pass
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def test_trns_rgb(self) -> None:
|
|
# Check writing and reading of tRNS chunks for RGB images.
|
|
# Independent file sample provided by Sebastian Spaeth.
|
|
|
|
test_file = "Tests/images/caption_6_33_22.png"
|
|
with Image.open(test_file) as im:
|
|
assert im.info["transparency"] == (248, 248, 248)
|
|
|
|
# check saving transparency by default
|
|
im = roundtrip(im)
|
|
assert im.info["transparency"] == (248, 248, 248)
|
|
|
|
im = roundtrip(im, transparency=(0, 1, 2))
|
|
assert im.info["transparency"] == (0, 1, 2)
|
|
|
|
def test_trns_p(self, tmp_path: Path) -> None:
|
|
# Check writing a transparency of 0, issue #528
|
|
im = hopper("P")
|
|
im.info["transparency"] = 0
|
|
|
|
f = tmp_path / "temp.png"
|
|
im.save(f)
|
|
|
|
with Image.open(f) as im2:
|
|
assert "transparency" in im2.info
|
|
|
|
assert_image_equal(im2.convert("RGBA"), im.convert("RGBA"))
|
|
|
|
def test_trns_null(self) -> None:
|
|
# Check reading images with null tRNS value, issue #1239
|
|
test_file = "Tests/images/tRNS_null_1x1.png"
|
|
with Image.open(test_file) as im:
|
|
assert im.info["transparency"] == 0
|
|
|
|
def test_save_icc_profile(self) -> None:
|
|
with Image.open("Tests/images/icc_profile_none.png") as im:
|
|
assert im.info["icc_profile"] is None
|
|
|
|
with Image.open("Tests/images/icc_profile.png") as with_icc:
|
|
expected_icc = with_icc.info["icc_profile"]
|
|
|
|
im = roundtrip(im, icc_profile=expected_icc)
|
|
assert im.info["icc_profile"] == expected_icc
|
|
|
|
def test_discard_icc_profile(self) -> None:
|
|
with Image.open("Tests/images/icc_profile.png") as im:
|
|
assert "icc_profile" in im.info
|
|
|
|
im = roundtrip(im, icc_profile=None)
|
|
assert "icc_profile" not in im.info
|
|
|
|
def test_roundtrip_icc_profile(self) -> None:
|
|
with Image.open("Tests/images/icc_profile.png") as im:
|
|
expected_icc = im.info["icc_profile"]
|
|
|
|
im = roundtrip(im)
|
|
assert im.info["icc_profile"] == expected_icc
|
|
|
|
def test_roundtrip_no_icc_profile(self) -> None:
|
|
with Image.open("Tests/images/icc_profile_none.png") as im:
|
|
assert im.info["icc_profile"] is None
|
|
|
|
im = roundtrip(im)
|
|
assert "icc_profile" not in im.info
|
|
|
|
def test_repr_png(self) -> None:
|
|
im = hopper()
|
|
b = im._repr_png_()
|
|
assert b is not None
|
|
|
|
with Image.open(BytesIO(b)) as repr_png:
|
|
assert repr_png.format == "PNG"
|
|
assert_image_equal(im, repr_png)
|
|
|
|
def test_repr_png_error_returns_none(self) -> None:
|
|
im = hopper("F")
|
|
|
|
assert im._repr_png_() is None
|
|
|
|
def test_chunk_order(self, tmp_path: Path) -> None:
|
|
with Image.open("Tests/images/icc_profile.png") as im:
|
|
test_file = tmp_path / "temp.png"
|
|
im.convert("P").save(test_file, dpi=(100, 100))
|
|
|
|
chunks = self.get_chunks(test_file)
|
|
|
|
# https://www.w3.org/TR/PNG/#5ChunkOrdering
|
|
# IHDR - shall be first
|
|
assert chunks.index(b"IHDR") == 0
|
|
# PLTE - before first IDAT
|
|
assert chunks.index(b"PLTE") < chunks.index(b"IDAT")
|
|
# iCCP - before PLTE and IDAT
|
|
assert chunks.index(b"iCCP") < chunks.index(b"PLTE")
|
|
assert chunks.index(b"iCCP") < chunks.index(b"IDAT")
|
|
# tRNS - after PLTE, before IDAT
|
|
assert chunks.index(b"tRNS") > chunks.index(b"PLTE")
|
|
assert chunks.index(b"tRNS") < chunks.index(b"IDAT")
|
|
# pHYs - before IDAT
|
|
assert chunks.index(b"pHYs") < chunks.index(b"IDAT")
|
|
|
|
def test_getchunks(self) -> None:
|
|
im = hopper()
|
|
|
|
chunks = PngImagePlugin.getchunks(im)
|
|
assert len(chunks) == 3
|
|
|
|
def test_read_private_chunks(self) -> None:
|
|
with Image.open("Tests/images/exif.png") as im:
|
|
assert isinstance(im, PngImagePlugin.PngImageFile)
|
|
assert im.private_chunks == [(b"orNT", b"\x01")]
|
|
|
|
def test_roundtrip_private_chunk(self) -> None:
|
|
# Check private chunk roundtripping
|
|
|
|
with Image.open(TEST_PNG_FILE) as im:
|
|
info = PngImagePlugin.PngInfo()
|
|
info.add(b"prIV", b"VALUE")
|
|
info.add(b"atEC", b"VALUE2")
|
|
info.add(b"prIV", b"VALUE3", True)
|
|
|
|
im = roundtrip(im, pnginfo=info)
|
|
assert im.private_chunks == [(b"prIV", b"VALUE"), (b"atEC", b"VALUE2")]
|
|
im.load()
|
|
assert im.private_chunks == [
|
|
(b"prIV", b"VALUE"),
|
|
(b"atEC", b"VALUE2"),
|
|
(b"prIV", b"VALUE3", True),
|
|
]
|
|
|
|
def test_textual_chunks_after_idat(self, monkeypatch: pytest.MonkeyPatch) -> None:
|
|
with Image.open("Tests/images/hopper.png") as im:
|
|
assert isinstance(im, PngImagePlugin.PngImageFile)
|
|
assert "comment" in im.text
|
|
for k, v in {
|
|
"date:create": "2014-09-04T09:37:08+03:00",
|
|
"date:modify": "2014-09-04T09:37:08+03:00",
|
|
}.items():
|
|
assert im.text[k] == v
|
|
|
|
# Raises a SyntaxError in load_end
|
|
with Image.open("Tests/images/broken_data_stream.png") as im:
|
|
assert isinstance(im, PngImagePlugin.PngImageFile)
|
|
with pytest.raises(OSError):
|
|
assert isinstance(im.text, dict)
|
|
|
|
# Raises an EOFError in load_end
|
|
with Image.open("Tests/images/hopper_idat_after_image_end.png") as im:
|
|
assert isinstance(im, PngImagePlugin.PngImageFile)
|
|
assert im.text == {"TXT": "VALUE", "ZIP": "VALUE"}
|
|
|
|
# Raises a UnicodeDecodeError in load_end
|
|
with Image.open("Tests/images/truncated_image.png") as im:
|
|
assert isinstance(im, PngImagePlugin.PngImageFile)
|
|
|
|
# The file is truncated
|
|
with pytest.raises(OSError):
|
|
im.text
|
|
monkeypatch.setattr(ImageFile, "LOAD_TRUNCATED_IMAGES", True)
|
|
assert isinstance(im.text, dict)
|
|
|
|
def test_unknown_compression_method(self) -> None:
|
|
with pytest.raises(SyntaxError, match="Unknown compression method"):
|
|
PngImagePlugin.PngImageFile("Tests/images/unknown_compression_method.png")
|
|
|
|
def test_padded_idat(self) -> None:
|
|
# This image has been manually hexedited
|
|
# so that the IDAT chunk has padding at the end
|
|
# Set MAXBLOCK to the length of the actual data
|
|
# so that the decoder finishes reading before the chunk ends
|
|
MAXBLOCK = ImageFile.MAXBLOCK
|
|
ImageFile.MAXBLOCK = 45
|
|
ImageFile.LOAD_TRUNCATED_IMAGES = True
|
|
|
|
with Image.open("Tests/images/padded_idat.png") as im:
|
|
im.load()
|
|
|
|
ImageFile.MAXBLOCK = MAXBLOCK
|
|
ImageFile.LOAD_TRUNCATED_IMAGES = False
|
|
|
|
assert_image_equal_tofile(im, "Tests/images/bw_gradient.png")
|
|
|
|
@pytest.mark.parametrize(
|
|
"cid", (b"IHDR", b"sRGB", b"pHYs", b"acTL", b"fcTL", b"fdAT")
|
|
)
|
|
def test_truncated_chunks(
|
|
self, cid: bytes, monkeypatch: pytest.MonkeyPatch
|
|
) -> None:
|
|
fp = BytesIO()
|
|
with PngImagePlugin.PngStream(fp) as png:
|
|
with pytest.raises(ValueError):
|
|
png.call(cid, 0, 0)
|
|
|
|
monkeypatch.setattr(ImageFile, "LOAD_TRUNCATED_IMAGES", True)
|
|
png.call(cid, 0, 0)
|
|
|
|
@pytest.mark.parametrize("save_all", (True, False))
|
|
def test_specify_bits(self, save_all: bool, tmp_path: Path) -> None:
|
|
im = hopper("P")
|
|
|
|
out = tmp_path / "temp.png"
|
|
im.save(out, bits=4, save_all=save_all)
|
|
|
|
with Image.open(out) as reloaded:
|
|
assert len(reloaded.png.im_palette[1]) == 48
|
|
|
|
def test_plte_length(self, tmp_path: Path) -> None:
|
|
im = Image.new("P", (1, 1))
|
|
im.putpalette((1, 1, 1))
|
|
|
|
out = tmp_path / "temp.png"
|
|
im.save(out)
|
|
|
|
with Image.open(out) as reloaded:
|
|
assert len(reloaded.png.im_palette[1]) == 3
|
|
|
|
def test_getxmp(self) -> None:
|
|
with Image.open("Tests/images/color_snakes.png") as im:
|
|
if ElementTree is None:
|
|
with pytest.warns(
|
|
UserWarning,
|
|
match="XMP data cannot be read without defusedxml dependency",
|
|
):
|
|
assert im.getxmp() == {}
|
|
else:
|
|
assert "xmp" in im.info
|
|
xmp = im.getxmp()
|
|
|
|
description = xmp["xmpmeta"]["RDF"]["Description"]
|
|
assert description["PixelXDimension"] == "10"
|
|
assert description["subject"]["Seq"] is None
|
|
|
|
def test_exif(self) -> None:
|
|
# With an EXIF chunk
|
|
with Image.open("Tests/images/exif.png") as im:
|
|
exif = im._getexif()
|
|
assert exif[274] == 1
|
|
|
|
# With an ImageMagick zTXt chunk
|
|
with Image.open("Tests/images/exif_imagemagick.png") as im:
|
|
exif = im._getexif()
|
|
assert exif[274] == 1
|
|
|
|
# Assert that info still can be extracted
|
|
# when the image is no longer a PngImageFile instance
|
|
exif = im.copy().getexif()
|
|
assert exif[274] == 1
|
|
|
|
# With a tEXt chunk
|
|
with Image.open("Tests/images/exif_text.png") as im:
|
|
exif = im._getexif()
|
|
assert exif[274] == 1
|
|
|
|
# With XMP tags
|
|
with Image.open("Tests/images/xmp_tags_orientation.png") as im:
|
|
exif = im.getexif()
|
|
assert exif[274] == 3
|
|
|
|
def test_exif_save(self, tmp_path: Path) -> None:
|
|
# Test exif is not saved from info
|
|
test_file = tmp_path / "temp.png"
|
|
with Image.open("Tests/images/exif.png") as im:
|
|
im.save(test_file)
|
|
|
|
with Image.open(test_file) as reloaded:
|
|
assert isinstance(reloaded, PngImagePlugin.PngImageFile)
|
|
assert reloaded._getexif() is None
|
|
|
|
# Test passing in exif
|
|
with Image.open("Tests/images/exif.png") as im:
|
|
im.save(test_file, exif=im.getexif())
|
|
|
|
with Image.open(test_file) as reloaded:
|
|
exif = reloaded._getexif()
|
|
assert exif[274] == 1
|
|
|
|
@mark_if_feature_version(
|
|
pytest.mark.valgrind_known_error, "libjpeg_turbo", "2.0", reason="Known Failing"
|
|
)
|
|
def test_exif_from_jpg(self, tmp_path: Path) -> None:
|
|
with Image.open("Tests/images/pil_sample_rgb.jpg") as im:
|
|
test_file = tmp_path / "temp.png"
|
|
im.save(test_file, exif=im.getexif())
|
|
|
|
with Image.open(test_file) as reloaded:
|
|
exif = reloaded._getexif()
|
|
assert exif[305] == "Adobe Photoshop CS Macintosh"
|
|
|
|
def test_exif_argument(self, tmp_path: Path) -> None:
|
|
with Image.open(TEST_PNG_FILE) as im:
|
|
test_file = tmp_path / "temp.png"
|
|
im.save(test_file, exif=b"exifstring")
|
|
|
|
with Image.open(test_file) as reloaded:
|
|
assert reloaded.info["exif"] == b"Exif\x00\x00exifstring"
|
|
|
|
def test_tell(self) -> None:
|
|
with Image.open(TEST_PNG_FILE) as im:
|
|
assert im.tell() == 0
|
|
|
|
def test_seek(self) -> None:
|
|
with Image.open(TEST_PNG_FILE) as im:
|
|
im.seek(0)
|
|
|
|
with pytest.raises(EOFError):
|
|
im.seek(1)
|
|
|
|
@pytest.mark.parametrize("buffer", (True, False))
|
|
def test_save_stdout(self, buffer: bool, monkeypatch: pytest.MonkeyPatch) -> None:
|
|
|
|
class MyStdOut:
|
|
buffer = BytesIO()
|
|
|
|
mystdout: MyStdOut | BytesIO = MyStdOut() if buffer else BytesIO()
|
|
|
|
monkeypatch.setattr(sys, "stdout", mystdout)
|
|
|
|
with Image.open(TEST_PNG_FILE) as im:
|
|
im.save(sys.stdout, "PNG")
|
|
|
|
if isinstance(mystdout, MyStdOut):
|
|
mystdout = mystdout.buffer
|
|
with Image.open(mystdout) as reloaded:
|
|
assert_image_equal_tofile(reloaded, TEST_PNG_FILE)
|
|
|
|
def test_truncated_end_chunk(self, monkeypatch: pytest.MonkeyPatch) -> None:
|
|
with Image.open("Tests/images/truncated_end_chunk.png") as im:
|
|
with pytest.raises(OSError):
|
|
im.load()
|
|
|
|
monkeypatch.setattr(ImageFile, "LOAD_TRUNCATED_IMAGES", True)
|
|
with Image.open("Tests/images/truncated_end_chunk.png") as im:
|
|
assert_image_equal_tofile(im, "Tests/images/hopper.png")
|
|
|
|
def test_deprecation(self, tmp_path: Path) -> None:
|
|
test_file = tmp_path / "out.png"
|
|
|
|
im = hopper("I")
|
|
with pytest.warns(DeprecationWarning, match="Saving I mode images as PNG"):
|
|
im.save(test_file)
|
|
|
|
with Image.open(test_file) as reloaded:
|
|
assert_image_equal(im, reloaded.convert("I"))
|
|
|
|
|
|
@pytest.mark.skipif(is_win32(), reason="Requires Unix or macOS")
|
|
@skip_unless_feature("zlib")
|
|
class TestTruncatedPngPLeaks(PillowLeakTestCase):
|
|
mem_limit = 2 * 1024 # max increase in K
|
|
iterations = 100 # Leak is 56k/iteration, this will leak 5.6megs
|
|
|
|
def test_leak_load(self, monkeypatch: pytest.MonkeyPatch) -> None:
|
|
with open("Tests/images/hopper.png", "rb") as f:
|
|
DATA = BytesIO(f.read(16 * 1024))
|
|
|
|
monkeypatch.setattr(ImageFile, "LOAD_TRUNCATED_IMAGES", True)
|
|
with Image.open(DATA) as im:
|
|
im.load()
|
|
|
|
def core() -> None:
|
|
with Image.open(DATA) as im:
|
|
im.load()
|
|
|
|
self._test_leak(core)
|