mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-11-10 19:56:47 +03:00
388 lines
11 KiB
Python
388 lines
11 KiB
Python
from __future__ import annotations
|
|
|
|
import sys
|
|
from io import BytesIO
|
|
from pathlib import Path
|
|
|
|
import pytest
|
|
|
|
from PIL import Image, PpmImagePlugin
|
|
|
|
from .helper import (
|
|
assert_image_equal,
|
|
assert_image_equal_tofile,
|
|
assert_image_similar,
|
|
hopper,
|
|
)
|
|
|
|
# sample ppm stream
|
|
TEST_FILE = "Tests/images/hopper.ppm"
|
|
|
|
|
|
def test_sanity() -> None:
|
|
with Image.open(TEST_FILE) as im:
|
|
assert im.mode == "RGB"
|
|
assert im.size == (128, 128)
|
|
assert im.format == "PPM"
|
|
assert im.get_format_mimetype() == "image/x-portable-pixmap"
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
"data, mode, pixels",
|
|
(
|
|
(b"P2 3 1 4 0 2 4", "L", (0, 128, 255)),
|
|
(b"P2 3 1 257 0 128 257", "I", (0, 32640, 65535)),
|
|
# P3 with maxval < 255
|
|
(
|
|
b"P3 3 1 17 0 1 2 8 9 10 15 16 17",
|
|
"RGB",
|
|
((0, 15, 30), (120, 135, 150), (225, 240, 255)),
|
|
),
|
|
# P3 with maxval > 255
|
|
# Scale down to 255, since there is no RGB mode with more than 8-bit
|
|
(
|
|
b"P3 3 1 257 0 1 2 128 129 130 256 257 257",
|
|
"RGB",
|
|
((0, 1, 2), (127, 128, 129), (254, 255, 255)),
|
|
),
|
|
(b"P5 3 1 4 \x00\x02\x04", "L", (0, 128, 255)),
|
|
(b"P5 3 1 257 \x00\x00\x00\x80\x01\x01", "I", (0, 32640, 65535)),
|
|
# P6 with maxval < 255
|
|
(
|
|
b"P6 3 1 17 \x00\x01\x02\x08\x09\x0A\x0F\x10\x11",
|
|
"RGB",
|
|
(
|
|
(0, 15, 30),
|
|
(120, 135, 150),
|
|
(225, 240, 255),
|
|
),
|
|
),
|
|
# P6 with maxval > 255
|
|
(
|
|
b"P6 3 1 257 \x00\x00\x00\x01\x00\x02"
|
|
b"\x00\x80\x00\x81\x00\x82\x01\x00\x01\x01\xFF\xFF",
|
|
"RGB",
|
|
(
|
|
(0, 1, 2),
|
|
(127, 128, 129),
|
|
(254, 255, 255),
|
|
),
|
|
),
|
|
),
|
|
)
|
|
def test_arbitrary_maxval(
|
|
data: bytes, mode: str, pixels: tuple[int | tuple[int, int, int], ...]
|
|
) -> None:
|
|
fp = BytesIO(data)
|
|
with Image.open(fp) as im:
|
|
assert im.size == (3, 1)
|
|
assert im.mode == mode
|
|
|
|
px = im.load()
|
|
assert tuple(px[x, 0] for x in range(3)) == pixels
|
|
|
|
|
|
def test_16bit_pgm() -> None:
|
|
with Image.open("Tests/images/16_bit_binary.pgm") as im:
|
|
assert im.mode == "I"
|
|
assert im.size == (20, 100)
|
|
assert im.get_format_mimetype() == "image/x-portable-graymap"
|
|
|
|
assert_image_equal_tofile(im, "Tests/images/16_bit_binary_pgm.tiff")
|
|
|
|
|
|
def test_16bit_pgm_write(tmp_path: Path) -> None:
|
|
with Image.open("Tests/images/16_bit_binary.pgm") as im:
|
|
filename = str(tmp_path / "temp.pgm")
|
|
im.save(filename, "PPM")
|
|
|
|
assert_image_equal_tofile(im, filename)
|
|
|
|
|
|
def test_pnm(tmp_path: Path) -> None:
|
|
with Image.open("Tests/images/hopper.pnm") as im:
|
|
assert_image_similar(im, hopper(), 0.0001)
|
|
|
|
filename = str(tmp_path / "temp.pnm")
|
|
im.save(filename)
|
|
|
|
assert_image_equal_tofile(im, filename)
|
|
|
|
|
|
def test_pfm(tmp_path: Path) -> None:
|
|
with Image.open("Tests/images/hopper.pfm") as im:
|
|
assert im.info["scale"] == 1.0
|
|
assert_image_equal(im, hopper("F"))
|
|
|
|
filename = str(tmp_path / "tmp.pfm")
|
|
im.save(filename)
|
|
|
|
assert_image_equal_tofile(im, filename)
|
|
|
|
|
|
def test_pfm_big_endian(tmp_path: Path) -> None:
|
|
with Image.open("Tests/images/hopper_be.pfm") as im:
|
|
assert im.info["scale"] == 2.5
|
|
assert_image_equal(im, hopper("F"))
|
|
|
|
filename = str(tmp_path / "tmp.pfm")
|
|
im.save(filename)
|
|
|
|
assert_image_equal_tofile(im, filename)
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
"data",
|
|
[
|
|
b"Pf 1 1 NaN \0\0\0\0",
|
|
b"Pf 1 1 inf \0\0\0\0",
|
|
b"Pf 1 1 -inf \0\0\0\0",
|
|
b"Pf 1 1 0.0 \0\0\0\0",
|
|
b"Pf 1 1 -0.0 \0\0\0\0",
|
|
],
|
|
)
|
|
def test_pfm_invalid(data: bytes) -> None:
|
|
with pytest.raises(ValueError):
|
|
with Image.open(BytesIO(data)):
|
|
pass
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
"plain_path, raw_path",
|
|
(
|
|
(
|
|
"Tests/images/hopper_1bit_plain.pbm", # P1
|
|
"Tests/images/hopper_1bit.pbm", # P4
|
|
),
|
|
(
|
|
"Tests/images/hopper_8bit_plain.pgm", # P2
|
|
"Tests/images/hopper_8bit.pgm", # P5
|
|
),
|
|
(
|
|
"Tests/images/hopper_8bit_plain.ppm", # P3
|
|
"Tests/images/hopper_8bit.ppm", # P6
|
|
),
|
|
),
|
|
)
|
|
def test_plain(plain_path: str, raw_path: str) -> None:
|
|
with Image.open(plain_path) as im:
|
|
assert_image_equal_tofile(im, raw_path)
|
|
|
|
|
|
def test_16bit_plain_pgm() -> None:
|
|
# P2 with maxval 2 ** 16 - 1
|
|
with Image.open("Tests/images/hopper_16bit_plain.pgm") as im:
|
|
assert im.mode == "I"
|
|
assert im.size == (128, 128)
|
|
assert im.get_format_mimetype() == "image/x-portable-graymap"
|
|
|
|
# P5 with maxval 2 ** 16 - 1
|
|
assert_image_equal_tofile(im, "Tests/images/hopper_16bit.pgm")
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
"header, data, comment_count",
|
|
(
|
|
(b"P1\n2 2", b"1010", 10**6),
|
|
(b"P2\n3 1\n4", b"0 2 4", 1),
|
|
(b"P3\n2 2\n255", b"0 0 0 001 1 1 2 2 2 255 255 255", 10**6),
|
|
),
|
|
)
|
|
def test_plain_data_with_comment(
|
|
tmp_path: Path, header: bytes, data: bytes, comment_count: int
|
|
) -> None:
|
|
path1 = str(tmp_path / "temp1.ppm")
|
|
path2 = str(tmp_path / "temp2.ppm")
|
|
comment = b"# comment" * comment_count
|
|
with open(path1, "wb") as f1, open(path2, "wb") as f2:
|
|
f1.write(header + b"\n\n" + data)
|
|
f2.write(header + b"\n" + comment + b"\n" + data + comment)
|
|
|
|
with Image.open(path1) as im:
|
|
assert_image_equal_tofile(im, path2)
|
|
|
|
|
|
@pytest.mark.parametrize("data", (b"P1\n128 128\n", b"P3\n128 128\n255\n"))
|
|
def test_plain_truncated_data(tmp_path: Path, data: bytes) -> None:
|
|
path = str(tmp_path / "temp.ppm")
|
|
with open(path, "wb") as f:
|
|
f.write(data)
|
|
|
|
with Image.open(path) as im:
|
|
with pytest.raises(ValueError):
|
|
im.load()
|
|
|
|
|
|
@pytest.mark.parametrize("data", (b"P1\n128 128\n1009", b"P3\n128 128\n255\n100A"))
|
|
def test_plain_invalid_data(tmp_path: Path, data: bytes) -> None:
|
|
path = str(tmp_path / "temp.ppm")
|
|
with open(path, "wb") as f:
|
|
f.write(data)
|
|
|
|
with Image.open(path) as im:
|
|
with pytest.raises(ValueError):
|
|
im.load()
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
"data",
|
|
(
|
|
b"P3\n128 128\n255\n012345678910", # half token too long
|
|
b"P3\n128 128\n255\n012345678910 0", # token too long
|
|
),
|
|
)
|
|
def test_plain_ppm_token_too_long(tmp_path: Path, data: bytes) -> None:
|
|
path = str(tmp_path / "temp.ppm")
|
|
with open(path, "wb") as f:
|
|
f.write(data)
|
|
|
|
with Image.open(path) as im:
|
|
with pytest.raises(ValueError):
|
|
im.load()
|
|
|
|
|
|
def test_plain_ppm_value_negative(tmp_path: Path) -> None:
|
|
path = str(tmp_path / "temp.ppm")
|
|
with open(path, "wb") as f:
|
|
f.write(b"P3\n128 128\n255\n-1")
|
|
|
|
with Image.open(path) as im:
|
|
with pytest.raises(ValueError, match="Channel value is negative"):
|
|
im.load()
|
|
|
|
|
|
def test_plain_ppm_value_too_large(tmp_path: Path) -> None:
|
|
path = str(tmp_path / "temp.ppm")
|
|
with open(path, "wb") as f:
|
|
f.write(b"P3\n128 128\n255\n256")
|
|
|
|
with Image.open(path) as im:
|
|
with pytest.raises(ValueError, match="Channel value too large"):
|
|
im.load()
|
|
|
|
|
|
def test_magic() -> None:
|
|
with pytest.raises(SyntaxError):
|
|
PpmImagePlugin.PpmImageFile(fp=BytesIO(b"PyInvalid"))
|
|
|
|
|
|
def test_header_with_comments(tmp_path: Path) -> None:
|
|
path = str(tmp_path / "temp.ppm")
|
|
with open(path, "wb") as f:
|
|
f.write(b"P6 #comment\n#comment\r12#comment\r8\n128 #comment\n255\n")
|
|
|
|
with Image.open(path) as im:
|
|
assert im.size == (128, 128)
|
|
|
|
|
|
def test_non_integer_token(tmp_path: Path) -> None:
|
|
path = str(tmp_path / "temp.ppm")
|
|
with open(path, "wb") as f:
|
|
f.write(b"P6\nTEST")
|
|
|
|
with pytest.raises(ValueError):
|
|
with Image.open(path):
|
|
pass
|
|
|
|
|
|
def test_header_token_too_long(tmp_path: Path) -> None:
|
|
path = str(tmp_path / "temp.ppm")
|
|
with open(path, "wb") as f:
|
|
f.write(b"P6\n 01234567890")
|
|
|
|
with pytest.raises(ValueError) as e:
|
|
with Image.open(path):
|
|
pass
|
|
|
|
assert str(e.value) == "Token too long in file header: 01234567890"
|
|
|
|
|
|
def test_truncated_file(tmp_path: Path) -> None:
|
|
# Test EOF in header
|
|
path = str(tmp_path / "temp.pgm")
|
|
with open(path, "wb") as f:
|
|
f.write(b"P6")
|
|
|
|
with pytest.raises(ValueError) as e:
|
|
with Image.open(path):
|
|
pass
|
|
|
|
assert str(e.value) == "Reached EOF while reading header"
|
|
|
|
# Test EOF for PyDecoder
|
|
fp = BytesIO(b"P5 3 1 4")
|
|
with Image.open(fp) as im:
|
|
with pytest.raises(ValueError):
|
|
im.load()
|
|
|
|
|
|
def test_not_enough_image_data(tmp_path: Path) -> None:
|
|
path = str(tmp_path / "temp.ppm")
|
|
with open(path, "wb") as f:
|
|
f.write(b"P2 1 2 255 255")
|
|
|
|
with Image.open(path) as im:
|
|
with pytest.raises(ValueError):
|
|
im.load()
|
|
|
|
|
|
@pytest.mark.parametrize("maxval", (b"0", b"65536"))
|
|
def test_invalid_maxval(maxval: bytes, tmp_path: Path) -> None:
|
|
path = str(tmp_path / "temp.ppm")
|
|
with open(path, "wb") as f:
|
|
f.write(b"P6\n3 1 " + maxval)
|
|
|
|
with pytest.raises(ValueError) as e:
|
|
with Image.open(path):
|
|
pass
|
|
|
|
assert str(e.value) == "maxval must be greater than 0 and less than 65536"
|
|
|
|
|
|
def test_neg_ppm() -> None:
|
|
# Storage.c accepted negative values for xsize, ysize. the
|
|
# internal open_ppm function didn't check for sanity but it
|
|
# has been removed. The default opener doesn't accept negative
|
|
# sizes.
|
|
|
|
with pytest.raises(OSError):
|
|
with Image.open("Tests/images/negative_size.ppm"):
|
|
pass
|
|
|
|
|
|
def test_mimetypes(tmp_path: Path) -> None:
|
|
path = str(tmp_path / "temp.pgm")
|
|
|
|
with open(path, "wb") as f:
|
|
f.write(b"P4\n128 128\n255")
|
|
with Image.open(path) as im:
|
|
assert im.get_format_mimetype() == "image/x-portable-bitmap"
|
|
|
|
with open(path, "wb") as f:
|
|
f.write(b"PyCMYK\n128 128\n255")
|
|
with Image.open(path) as im:
|
|
assert im.get_format_mimetype() == "image/x-portable-anymap"
|
|
|
|
|
|
@pytest.mark.parametrize("buffer", (True, False))
|
|
def test_save_stdout(buffer: bool) -> None:
|
|
old_stdout = sys.stdout
|
|
|
|
class MyStdOut:
|
|
buffer = BytesIO()
|
|
|
|
mystdout: MyStdOut | BytesIO = MyStdOut() if buffer else BytesIO()
|
|
|
|
sys.stdout = mystdout # type: ignore[assignment]
|
|
|
|
with Image.open(TEST_FILE) as im:
|
|
im.save(sys.stdout, "PPM")
|
|
|
|
# Reset stdout
|
|
sys.stdout = old_stdout
|
|
|
|
if isinstance(mystdout, MyStdOut):
|
|
mystdout = mystdout.buffer
|
|
with Image.open(mystdout) as reloaded:
|
|
assert_image_equal_tofile(reloaded, TEST_FILE)
|