Pillow/Tests/test_file_tga.py
2024-02-20 15:41:20 +11:00

253 lines
7.7 KiB
Python

from __future__ import annotations
import os
from glob import glob
from itertools import product
from pathlib import Path
import pytest
from PIL import Image
from .helper import assert_image_equal, assert_image_equal_tofile, 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}
@pytest.mark.parametrize("mode", _MODES)
def test_sanity(mode: str, tmp_path: Path) -> None:
def roundtrip(original_im: Image.Image) -> None:
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, f"*x*_{mode.lower()}.png"))
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_palette_depth_16(tmp_path: Path) -> None:
with Image.open("Tests/images/p_16.tga") as im:
assert_image_equal_tofile(im.convert("RGB"), "Tests/images/p_16.png")
out = str(tmp_path / "temp.png")
im.save(out)
with Image.open(out) as reloaded:
assert_image_equal_tofile(reloaded.convert("RGB"), "Tests/images/p_16.png")
def test_id_field() -> None:
# 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() -> None:
# 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_cross_scan_line() -> None:
with Image.open("Tests/images/cross_scan_line.tga") as im:
assert_image_equal_tofile(im, "Tests/images/cross_scan_line.png")
with Image.open("Tests/images/cross_scan_line_truncated.tga") as im:
with pytest.raises(OSError):
im.load()
def test_save(tmp_path: Path) -> None:
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_small_palette(tmp_path: Path) -> None:
im = Image.new("P", (1, 1))
colors = [0, 0, 0]
im.putpalette(colors)
out = str(tmp_path / "temp.tga")
im.save(out)
with Image.open(out) as reloaded:
assert reloaded.getpalette() == colors
def test_save_wrong_mode(tmp_path: Path) -> None:
im = hopper("PA")
out = str(tmp_path / "temp.tga")
with pytest.raises(OSError):
im.save(out)
def test_save_mapdepth() -> None:
# This image has been manually hexedited from 200x32_p_bl_raw.tga
# to include an origin
test_file = "Tests/images/200x32_p_bl_raw_origin.tga"
with Image.open(test_file) as im:
assert_image_equal_tofile(im, "Tests/images/tga/common/200x32_p.png")
def test_save_id_section(tmp_path: Path) -> None:
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
with pytest.warns(UserWarning):
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: Path) -> None:
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_horizontal_orientations() -> None:
# These images have been manually hexedited to have the relevant orientations
with Image.open("Tests/images/rgb32rle_top_right.tga") as im:
assert im.load()[90, 90][:3] == (0, 0, 0)
with Image.open("Tests/images/rgb32rle_bottom_right.tga") as im:
assert im.load()[90, 90][:3] == (0, 255, 0)
def test_save_rle(tmp_path: Path) -> None:
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: Path) -> None:
# 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)