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|
from __future__ import annotations
import os
import subprocess
import sys
import sysconfig
from types import ModuleType
import pytest
from PIL import Image
from .helper import assert_image_equal, hopper, is_win32
numpy: ModuleType | None
try:
import numpy
except ImportError:
numpy = None
class TestImagePutPixel:
def test_sanity(self) -> None:
im1 = hopper()
im2 = Image.new(im1.mode, im1.size, 0)
for y in range(im1.size[1]):
for x in range(im1.size[0]):
pos = x, y
value = im1.getpixel(pos)
assert value is not None
im2.putpixel(pos, value)
assert_image_equal(im1, im2)
im2 = Image.new(im1.mode, im1.size, 0)
im2.readonly = 1
for y in range(im1.size[1]):
for x in range(im1.size[0]):
pos = x, y
value = im1.getpixel(pos)
assert value is not None
im2.putpixel(pos, value)
assert not im2.readonly
assert_image_equal(im1, im2)
im2 = Image.new(im1.mode, im1.size, 0)
pix1 = im1.load()
pix2 = im2.load()
assert pix1 is not None
assert pix2 is not None
with pytest.raises(TypeError):
pix1[0, "0"] # type: ignore[index]
with pytest.raises(TypeError):
pix1["0", 0] # type: ignore[index]
for y in range(im1.size[1]):
for x in range(im1.size[0]):
pix2[x, y] = pix1[x, y]
assert_image_equal(im1, im2)
def test_sanity_negative_index(self) -> None:
im1 = hopper()
im2 = Image.new(im1.mode, im1.size, 0)
width, height = im1.size
assert im1.getpixel((0, 0)) == im1.getpixel((-width, -height))
assert im1.getpixel((-1, -1)) == im1.getpixel((width - 1, height - 1))
for y in range(-1, -im1.size[1] - 1, -1):
for x in range(-1, -im1.size[0] - 1, -1):
pos = x, y
value = im1.getpixel(pos)
assert value is not None
im2.putpixel(pos, value)
assert_image_equal(im1, im2)
im2 = Image.new(im1.mode, im1.size, 0)
im2.readonly = 1
for y in range(-1, -im1.size[1] - 1, -1):
for x in range(-1, -im1.size[0] - 1, -1):
pos = x, y
value = im1.getpixel(pos)
assert value is not None
im2.putpixel(pos, value)
assert not im2.readonly
assert_image_equal(im1, im2)
im2 = Image.new(im1.mode, im1.size, 0)
pix1 = im1.load()
pix2 = im2.load()
assert pix1 is not None
assert pix2 is not None
for y in range(-1, -im1.size[1] - 1, -1):
for x in range(-1, -im1.size[0] - 1, -1):
pix2[x, y] = pix1[x, y]
assert_image_equal(im1, im2)
@pytest.mark.skipif(numpy is None, reason="NumPy not installed")
def test_numpy(self) -> None:
im = hopper()
px = im.load()
assert px is not None
assert numpy is not None
assert px[numpy.int32(1), numpy.int32(2)] == (18, 20, 59)
class TestImageGetPixel:
@staticmethod
def color(mode: str) -> int | tuple[int, ...]:
bands = Image.getmodebands(mode)
if bands == 1:
return 1
return tuple(range(1, bands + 1))
def check(self, mode: str, expected_color_int: int | None = None) -> None:
expected_color = (
self.color(mode) if expected_color_int is None else expected_color_int
)
# Check putpixel
im = Image.new(mode, (1, 1), None)
im.putpixel((0, 0), expected_color)
actual_color = im.getpixel((0, 0))
assert actual_color == expected_color, (
f"put/getpixel roundtrip failed for mode {mode}, "
f"expected {expected_color} got {actual_color}"
)
# Check putpixel negative index
im.putpixel((-1, -1), expected_color)
actual_color = im.getpixel((-1, -1))
assert actual_color == expected_color, (
f"put/getpixel roundtrip negative index failed for mode {mode}, "
f"expected {expected_color} got {actual_color}"
)
# Check 0x0 image with None initial color
im = Image.new(mode, (0, 0), None)
assert im.load() is not None
with pytest.raises(IndexError):
im.putpixel((0, 0), expected_color)
with pytest.raises(IndexError):
im.getpixel((0, 0))
# Check negative index
with pytest.raises(IndexError):
im.putpixel((-1, -1), expected_color)
with pytest.raises(IndexError):
im.getpixel((-1, -1))
# Check initial color
im = Image.new(mode, (1, 1), expected_color)
actual_color = im.getpixel((0, 0))
assert actual_color == expected_color, (
f"initial color failed for mode {mode}, "
f"expected {expected_color} got {actual_color}"
)
# Check initial color negative index
actual_color = im.getpixel((-1, -1))
assert actual_color == expected_color, (
f"initial color failed with negative index for mode {mode}, "
f"expected {expected_color} got {actual_color}"
)
# Check 0x0 image with initial color
im = Image.new(mode, (0, 0), expected_color)
with pytest.raises(IndexError):
im.getpixel((0, 0))
# Check negative index
with pytest.raises(IndexError):
im.getpixel((-1, -1))
@pytest.mark.parametrize("mode", Image.MODES)
def test_basic(self, mode: str) -> None:
self.check(mode)
def test_list(self) -> None:
im = hopper()
assert im.getpixel([0, 0]) == (20, 20, 70)
@pytest.mark.parametrize("mode", ("I;16", "I;16B"))
@pytest.mark.parametrize("expected_color", (2**15 - 1, 2**15, 2**15 + 1, 2**16 - 1))
def test_signedness(self, mode: str, expected_color: int) -> None:
# See https://github.com/python-pillow/Pillow/issues/452
# pixelaccess is using signed int* instead of uint*
self.check(mode, expected_color)
@pytest.mark.parametrize("mode", ("P", "PA"))
@pytest.mark.parametrize("color", ((255, 0, 0), (255, 0, 0, 255)))
def test_p_putpixel_rgb_rgba(self, mode: str, color: tuple[int, ...]) -> None:
im = Image.new(mode, (1, 1))
im.putpixel((0, 0), color)
alpha = color[3] if len(color) == 4 and mode == "PA" else 255
assert im.convert("RGBA").getpixel((0, 0)) == (255, 0, 0, alpha)
class TestImagePutPixelError:
IMAGE_MODES1 = ["LA", "RGB", "RGBA"]
IMAGE_MODES2 = ["L", "I", "I;16"]
INVALID_TYPES = ["foo", 1.0, None]
@pytest.mark.parametrize("mode", IMAGE_MODES1)
def test_putpixel_type_error1(self, mode: str) -> None:
im = hopper(mode)
for v in self.INVALID_TYPES:
with pytest.raises(TypeError, match="color must be int or tuple"):
im.putpixel((0, 0), v) # type: ignore[arg-type]
@pytest.mark.parametrize(
"mode, band_numbers, match",
(
("L", (0, 2), "color must be int or single-element tuple"),
("LA", (0, 3), "color must be int, or tuple of one or two elements"),
(
"RGB",
(0, 2, 5),
"color must be int, or tuple of one, three or four elements",
),
),
)
def test_putpixel_invalid_number_of_bands(
self, mode: str, band_numbers: tuple[int, ...], match: str
) -> None:
im = hopper(mode)
for band_number in band_numbers:
with pytest.raises(TypeError, match=match):
im.putpixel((0, 0), (0,) * band_number)
@pytest.mark.parametrize("mode", IMAGE_MODES2)
def test_putpixel_type_error2(self, mode: str) -> None:
im = hopper(mode)
for v in self.INVALID_TYPES:
with pytest.raises(
TypeError, match="color must be int or single-element tuple"
):
im.putpixel((0, 0), v) # type: ignore[arg-type]
@pytest.mark.parametrize("mode", IMAGE_MODES1 + IMAGE_MODES2)
def test_putpixel_overflow_error(self, mode: str) -> None:
im = hopper(mode)
with pytest.raises(OverflowError):
im.putpixel((0, 0), 2**80)
class TestEmbeddable:
@pytest.mark.xfail(not (sys.version_info >= (3, 13)), reason="failing test")
@pytest.mark.skipif(not is_win32(), reason="requires Windows")
def test_embeddable(self) -> None:
import ctypes
from setuptools.command import build_ext
compiler = getattr(build_ext, "new_compiler")()
compiler.add_include_dir(sysconfig.get_config_var("INCLUDEPY"))
libdir = sysconfig.get_config_var("LIBDIR") or sysconfig.get_config_var(
"INCLUDEPY"
).replace("include", "libs")
compiler.add_library_dir(libdir)
try:
compiler.initialize()
except Exception:
pytest.skip("Compiler could not be initialized")
with open("embed_pil.c", "w", encoding="utf-8") as fh:
home = sys.prefix.replace("\\", "\\\\")
fh.write(
f"""
#include "Python.h"
int main(int argc, char* argv[])
{{
char *home = "{home}";
wchar_t *whome = Py_DecodeLocale(home, NULL);
Py_SetPythonHome(whome);
Py_InitializeEx(0);
Py_DECREF(PyImport_ImportModule("PIL.Image"));
Py_Finalize();
Py_InitializeEx(0);
Py_DECREF(PyImport_ImportModule("PIL.Image"));
Py_Finalize();
PyMem_RawFree(whome);
return 0;
}}
"""
)
objects = compiler.compile(["embed_pil.c"])
compiler.link_executable(objects, "embed_pil")
env = os.environ.copy()
env["PATH"] = sys.prefix + ";" + env["PATH"]
# Do not display the Windows Error Reporting dialog
getattr(ctypes, "windll").kernel32.SetErrorMode(0x0002)
process = subprocess.Popen(["embed_pil.exe"], env=env)
process.communicate()
assert process.returncode == 0
def teardown_method(self) -> None:
try:
os.remove("embed_pil.c")
except FileNotFoundError:
# If the test was skipped or failed, the file won't exist
pass
|
