mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-12-27 10:26:19 +03:00
261 lines
8.6 KiB
Python
261 lines
8.6 KiB
Python
from __future__ import annotations
|
|
|
|
import io
|
|
import re
|
|
import sys
|
|
import warnings
|
|
from pathlib import Path
|
|
from typing import Any
|
|
|
|
import pytest
|
|
|
|
from PIL import Image, WebPImagePlugin, features
|
|
|
|
from .helper import (
|
|
assert_image_equal,
|
|
assert_image_similar,
|
|
assert_image_similar_tofile,
|
|
hopper,
|
|
skip_unless_feature,
|
|
)
|
|
|
|
try:
|
|
from PIL import _webp
|
|
|
|
HAVE_WEBP = True
|
|
except ImportError:
|
|
HAVE_WEBP = False
|
|
|
|
|
|
class TestUnsupportedWebp:
|
|
def test_unsupported(self) -> None:
|
|
if HAVE_WEBP:
|
|
WebPImagePlugin.SUPPORTED = False
|
|
|
|
file_path = "Tests/images/hopper.webp"
|
|
with pytest.warns(UserWarning):
|
|
with pytest.raises(OSError):
|
|
with Image.open(file_path):
|
|
pass
|
|
|
|
if HAVE_WEBP:
|
|
WebPImagePlugin.SUPPORTED = True
|
|
|
|
|
|
@skip_unless_feature("webp")
|
|
class TestFileWebp:
|
|
def setup_method(self) -> None:
|
|
self.rgb_mode = "RGB"
|
|
|
|
def test_version(self) -> None:
|
|
version = features.version_module("webp")
|
|
assert version is not None
|
|
assert re.search(r"\d+\.\d+\.\d+$", version)
|
|
|
|
def test_read_rgb(self) -> None:
|
|
"""
|
|
Can we read a RGB mode WebP file without error?
|
|
Does it have the bits we expect?
|
|
"""
|
|
|
|
with Image.open("Tests/images/hopper.webp") as image:
|
|
assert image.mode == self.rgb_mode
|
|
assert image.size == (128, 128)
|
|
assert image.format == "WEBP"
|
|
image.load()
|
|
image.getdata()
|
|
|
|
# generated with:
|
|
# dwebp -ppm ../../Tests/images/hopper.webp -o hopper_webp_bits.ppm
|
|
assert_image_similar_tofile(image, "Tests/images/hopper_webp_bits.ppm", 1.0)
|
|
|
|
def _roundtrip(
|
|
self, tmp_path: Path, mode: str, epsilon: float, args: dict[str, Any] = {}
|
|
) -> None:
|
|
temp_file = tmp_path / "temp.webp"
|
|
|
|
hopper(mode).save(temp_file, **args)
|
|
with Image.open(temp_file) as image:
|
|
assert image.mode == self.rgb_mode
|
|
assert image.size == (128, 128)
|
|
assert image.format == "WEBP"
|
|
image.load()
|
|
image.getdata()
|
|
|
|
if mode == self.rgb_mode:
|
|
# generated with: dwebp -ppm temp.webp -o hopper_webp_write.ppm
|
|
assert_image_similar_tofile(
|
|
image, "Tests/images/hopper_webp_write.ppm", 12.0
|
|
)
|
|
|
|
# This test asserts that the images are similar. If the average pixel
|
|
# difference between the two images is less than the epsilon value,
|
|
# then we're going to accept that it's a reasonable lossy version of
|
|
# the image.
|
|
target = hopper(mode)
|
|
if mode != self.rgb_mode:
|
|
target = target.convert(self.rgb_mode)
|
|
assert_image_similar(image, target, epsilon)
|
|
|
|
def test_write_rgb(self, tmp_path: Path) -> None:
|
|
"""
|
|
Can we write a RGB mode file to webp without error?
|
|
Does it have the bits we expect?
|
|
"""
|
|
|
|
self._roundtrip(tmp_path, self.rgb_mode, 12.5)
|
|
|
|
def test_write_method(self, tmp_path: Path) -> None:
|
|
self._roundtrip(tmp_path, self.rgb_mode, 12.0, {"method": 6})
|
|
|
|
buffer_no_args = io.BytesIO()
|
|
hopper().save(buffer_no_args, format="WEBP")
|
|
|
|
buffer_method = io.BytesIO()
|
|
hopper().save(buffer_method, format="WEBP", method=6)
|
|
assert buffer_no_args.getbuffer() != buffer_method.getbuffer()
|
|
|
|
def test_save_all(self, tmp_path: Path) -> None:
|
|
temp_file = tmp_path / "temp.webp"
|
|
im = Image.new("RGB", (1, 1))
|
|
im2 = Image.new("RGB", (1, 1), "#f00")
|
|
im.save(temp_file, save_all=True, append_images=[im2])
|
|
|
|
with Image.open(temp_file) as reloaded:
|
|
assert_image_equal(im, reloaded)
|
|
|
|
reloaded.seek(1)
|
|
assert_image_similar(im2, reloaded, 1)
|
|
|
|
def test_unsupported_image_mode(self) -> None:
|
|
im = Image.new("1", (1, 1))
|
|
with pytest.raises(ValueError):
|
|
_webp.WebPEncode(im.getim(), False, 0, 0, "", 4, 0, b"", "")
|
|
|
|
def test_icc_profile(self, tmp_path: Path) -> None:
|
|
self._roundtrip(tmp_path, self.rgb_mode, 12.5, {"icc_profile": None})
|
|
self._roundtrip(
|
|
tmp_path, self.rgb_mode, 12.5, {"icc_profile": None, "save_all": True}
|
|
)
|
|
|
|
def test_write_unsupported_mode_L(self, tmp_path: Path) -> None:
|
|
"""
|
|
Saving a black-and-white file to WebP format should work, and be
|
|
similar to the original file.
|
|
"""
|
|
|
|
self._roundtrip(tmp_path, "L", 10.0)
|
|
|
|
def test_write_unsupported_mode_P(self, tmp_path: Path) -> None:
|
|
"""
|
|
Saving a palette-based file to WebP format should work, and be
|
|
similar to the original file.
|
|
"""
|
|
|
|
self._roundtrip(tmp_path, "P", 50.0)
|
|
|
|
@pytest.mark.skipif(sys.maxsize <= 2**32, reason="Requires 64-bit system")
|
|
def test_write_encoding_error_message(self, tmp_path: Path) -> None:
|
|
im = Image.new("RGB", (15000, 15000))
|
|
with pytest.raises(ValueError) as e:
|
|
im.save(tmp_path / "temp.webp", method=0)
|
|
assert str(e.value) == "encoding error 6"
|
|
|
|
@pytest.mark.skipif(sys.maxsize <= 2**32, reason="Requires 64-bit system")
|
|
def test_write_encoding_error_bad_dimension(self, tmp_path: Path) -> None:
|
|
im = Image.new("L", (16384, 16384))
|
|
with pytest.raises(ValueError) as e:
|
|
im.save(tmp_path / "temp.webp")
|
|
assert (
|
|
str(e.value)
|
|
== "encoding error 5: Image size exceeds WebP limit of 16383 pixels"
|
|
)
|
|
|
|
def test_WebPEncode_with_invalid_args(self) -> None:
|
|
"""
|
|
Calling encoder functions with no arguments should result in an error.
|
|
"""
|
|
with pytest.raises(TypeError):
|
|
_webp.WebPAnimEncoder()
|
|
with pytest.raises(TypeError):
|
|
_webp.WebPEncode()
|
|
|
|
def test_WebPAnimDecoder_with_invalid_args(self) -> None:
|
|
"""
|
|
Calling decoder functions with no arguments should result in an error.
|
|
"""
|
|
with pytest.raises(TypeError):
|
|
_webp.WebPAnimDecoder()
|
|
|
|
def test_no_resource_warning(self, tmp_path: Path) -> None:
|
|
file_path = "Tests/images/hopper.webp"
|
|
with Image.open(file_path) as image:
|
|
with warnings.catch_warnings():
|
|
warnings.simplefilter("error")
|
|
|
|
image.save(tmp_path / "temp.webp")
|
|
|
|
def test_file_pointer_could_be_reused(self) -> None:
|
|
file_path = "Tests/images/hopper.webp"
|
|
with open(file_path, "rb") as blob:
|
|
Image.open(blob).load()
|
|
Image.open(blob).load()
|
|
|
|
@pytest.mark.parametrize(
|
|
"background",
|
|
(0, (0,), (-1, 0, 1, 2), (253, 254, 255, 256)),
|
|
)
|
|
def test_invalid_background(
|
|
self, background: int | tuple[int, ...], tmp_path: Path
|
|
) -> None:
|
|
temp_file = tmp_path / "temp.webp"
|
|
im = hopper()
|
|
with pytest.raises(OSError):
|
|
im.save(temp_file, save_all=True, append_images=[im], background=background)
|
|
|
|
def test_background_from_gif(self, tmp_path: Path) -> None:
|
|
out_webp = tmp_path / "temp.webp"
|
|
|
|
# Save L mode GIF with background
|
|
with Image.open("Tests/images/no_palette_with_background.gif") as im:
|
|
im.save(out_webp, save_all=True)
|
|
|
|
# Save P mode GIF with background
|
|
with Image.open("Tests/images/chi.gif") as im:
|
|
original_value = im.convert("RGB").getpixel((1, 1))
|
|
|
|
# Save as WEBP
|
|
im.save(out_webp, save_all=True)
|
|
|
|
# Save as GIF
|
|
out_gif = tmp_path / "temp.gif"
|
|
with Image.open(out_webp) as im:
|
|
im.save(out_gif)
|
|
|
|
with Image.open(out_gif) as reread:
|
|
reread_value = reread.convert("RGB").getpixel((1, 1))
|
|
difference = sum(abs(original_value[i] - reread_value[i]) for i in range(0, 3))
|
|
assert difference < 5
|
|
|
|
def test_duration(self, tmp_path: Path) -> None:
|
|
out_webp = tmp_path / "temp.webp"
|
|
|
|
with Image.open("Tests/images/dispose_bgnd.gif") as im:
|
|
assert im.info["duration"] == 1000
|
|
im.save(out_webp, save_all=True)
|
|
|
|
with Image.open(out_webp) as reloaded:
|
|
reloaded.load()
|
|
assert reloaded.info["duration"] == 1000
|
|
|
|
def test_roundtrip_rgba_palette(self, tmp_path: Path) -> None:
|
|
temp_file = tmp_path / "temp.webp"
|
|
im = Image.new("RGBA", (1, 1)).convert("P")
|
|
assert im.mode == "P"
|
|
assert im.palette is not None
|
|
assert im.palette.mode == "RGBA"
|
|
im.save(temp_file)
|
|
|
|
with Image.open(temp_file) as im:
|
|
assert im.getpixel((0, 0)) == (0, 0, 0, 0)
|