Pillow/Tests/test_file_tga.py
2020-03-23 07:05:51 +11:00

207 lines
6.0 KiB
Python

import os
from glob import glob
from itertools import product
import pytest
from PIL import Image
from .helper import assert_image_equal, hopper
_TGA_DIR = os.path.join("Tests", "images", "tga")
_TGA_DIR_COMMON = os.path.join(_TGA_DIR, "common")
_MODES = ("L", "LA", "P", "RGB", "RGBA")
_ORIGINS = ("tl", "bl")
_ORIGIN_TO_ORIENTATION = {"tl": 1, "bl": -1}
def test_sanity(tmp_path):
for mode in _MODES:
def roundtrip(original_im):
out = str(tmp_path / "temp.tga")
original_im.save(out, rle=rle)
with Image.open(out) as saved_im:
if rle:
assert (
saved_im.info["compression"] == original_im.info["compression"]
)
assert saved_im.info["orientation"] == original_im.info["orientation"]
if mode == "P":
assert saved_im.getpalette() == original_im.getpalette()
assert_image_equal(saved_im, original_im)
png_paths = glob(
os.path.join(_TGA_DIR_COMMON, "*x*_{}.png".format(mode.lower()))
)
for png_path in png_paths:
with Image.open(png_path) as reference_im:
assert reference_im.mode == mode
path_no_ext = os.path.splitext(png_path)[0]
for origin, rle in product(_ORIGINS, (True, False)):
tga_path = "{}_{}_{}.tga".format(
path_no_ext, origin, "rle" if rle else "raw"
)
with Image.open(tga_path) as original_im:
assert original_im.format == "TGA"
assert original_im.get_format_mimetype() == "image/x-tga"
if rle:
assert original_im.info["compression"] == "tga_rle"
assert (
original_im.info["orientation"]
== _ORIGIN_TO_ORIENTATION[origin]
)
if mode == "P":
assert original_im.getpalette() == reference_im.getpalette()
assert_image_equal(original_im, reference_im)
roundtrip(original_im)
def test_id_field():
# tga file with id field
test_file = "Tests/images/tga_id_field.tga"
# Act
with Image.open(test_file) as im:
# Assert
assert im.size == (100, 100)
def test_id_field_rle():
# tga file with id field
test_file = "Tests/images/rgb32rle.tga"
# Act
with Image.open(test_file) as im:
# Assert
assert im.size == (199, 199)
def test_save(tmp_path):
test_file = "Tests/images/tga_id_field.tga"
with Image.open(test_file) as im:
out = str(tmp_path / "temp.tga")
# Save
im.save(out)
with Image.open(out) as test_im:
assert test_im.size == (100, 100)
assert test_im.info["id_section"] == im.info["id_section"]
# RGBA save
im.convert("RGBA").save(out)
with Image.open(out) as test_im:
assert test_im.size == (100, 100)
def test_save_wrong_mode(tmp_path):
im = hopper("PA")
out = str(tmp_path / "temp.tga")
with pytest.raises(OSError):
im.save(out)
def test_save_id_section(tmp_path):
test_file = "Tests/images/rgb32rle.tga"
with Image.open(test_file) as im:
out = str(tmp_path / "temp.tga")
# Check there is no id section
im.save(out)
with Image.open(out) as test_im:
assert "id_section" not in test_im.info
# Save with custom id section
im.save(out, id_section=b"Test content")
with Image.open(out) as test_im:
assert test_im.info["id_section"] == b"Test content"
# Save with custom id section greater than 255 characters
id_section = b"Test content" * 25
pytest.warns(UserWarning, lambda: im.save(out, id_section=id_section))
with Image.open(out) as test_im:
assert test_im.info["id_section"] == id_section[:255]
test_file = "Tests/images/tga_id_field.tga"
with Image.open(test_file) as im:
# Save with no id section
im.save(out, id_section="")
with Image.open(out) as test_im:
assert "id_section" not in test_im.info
def test_save_orientation(tmp_path):
test_file = "Tests/images/rgb32rle.tga"
out = str(tmp_path / "temp.tga")
with Image.open(test_file) as im:
assert im.info["orientation"] == -1
im.save(out, orientation=1)
with Image.open(out) as test_im:
assert test_im.info["orientation"] == 1
def test_save_rle(tmp_path):
test_file = "Tests/images/rgb32rle.tga"
with Image.open(test_file) as im:
assert im.info["compression"] == "tga_rle"
out = str(tmp_path / "temp.tga")
# Save
im.save(out)
with Image.open(out) as test_im:
assert test_im.size == (199, 199)
assert test_im.info["compression"] == "tga_rle"
# Save without compression
im.save(out, compression=None)
with Image.open(out) as test_im:
assert "compression" not in test_im.info
# RGBA save
im.convert("RGBA").save(out)
with Image.open(out) as test_im:
assert test_im.size == (199, 199)
test_file = "Tests/images/tga_id_field.tga"
with Image.open(test_file) as im:
assert "compression" not in im.info
# Save with compression
im.save(out, compression="tga_rle")
with Image.open(out) as test_im:
assert test_im.info["compression"] == "tga_rle"
def test_save_l_transparency(tmp_path):
# There are 559 transparent pixels in la.tga.
num_transparent = 559
in_file = "Tests/images/la.tga"
with Image.open(in_file) as im:
assert im.mode == "LA"
assert im.getchannel("A").getcolors()[0][0] == num_transparent
out = str(tmp_path / "temp.tga")
im.save(out)
with Image.open(out) as test_im:
assert test_im.mode == "LA"
assert test_im.getchannel("A").getcolors()[0][0] == num_transparent
assert_image_equal(im, test_im)