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263 lines
7.9 KiB
Python
263 lines
7.9 KiB
Python
from __future__ import annotations
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import os
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from glob import glob
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from itertools import product
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from pathlib import Path
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import pytest
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from PIL import Image, UnidentifiedImageError
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from .helper import assert_image_equal, assert_image_equal_tofile, hopper
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_TGA_DIR = os.path.join("Tests", "images", "tga")
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_TGA_DIR_COMMON = os.path.join(_TGA_DIR, "common")
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_MODES = ("L", "LA", "P", "RGB", "RGBA")
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_ORIGINS = ("tl", "bl")
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_ORIGIN_TO_ORIENTATION = {"tl": 1, "bl": -1}
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@pytest.mark.parametrize("mode", _MODES)
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def test_sanity(mode: str, tmp_path: Path) -> None:
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def roundtrip(original_im: Image.Image) -> None:
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out = str(tmp_path / "temp.tga")
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original_im.save(out, rle=rle)
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with Image.open(out) as saved_im:
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if rle:
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assert saved_im.info["compression"] == original_im.info["compression"]
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assert saved_im.info["orientation"] == original_im.info["orientation"]
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if mode == "P":
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assert saved_im.getpalette() == original_im.getpalette()
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assert_image_equal(saved_im, original_im)
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png_paths = glob(os.path.join(_TGA_DIR_COMMON, f"*x*_{mode.lower()}.png"))
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for png_path in png_paths:
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with Image.open(png_path) as reference_im:
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assert reference_im.mode == mode
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path_no_ext = os.path.splitext(png_path)[0]
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for origin, rle in product(_ORIGINS, (True, False)):
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tga_path = "{}_{}_{}.tga".format(
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path_no_ext, origin, "rle" if rle else "raw"
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)
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with Image.open(tga_path) as original_im:
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assert original_im.format == "TGA"
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assert original_im.get_format_mimetype() == "image/x-tga"
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if rle:
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assert original_im.info["compression"] == "tga_rle"
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assert (
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original_im.info["orientation"]
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== _ORIGIN_TO_ORIENTATION[origin]
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)
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if mode == "P":
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assert original_im.getpalette() == reference_im.getpalette()
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assert_image_equal(original_im, reference_im)
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roundtrip(original_im)
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def test_palette_depth_8(tmp_path: Path) -> None:
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with pytest.raises(UnidentifiedImageError):
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Image.open("Tests/images/p_8.tga")
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def test_palette_depth_16(tmp_path: Path) -> None:
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with Image.open("Tests/images/p_16.tga") as im:
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assert_image_equal_tofile(im.convert("RGB"), "Tests/images/p_16.png")
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out = str(tmp_path / "temp.png")
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im.save(out)
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with Image.open(out) as reloaded:
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assert_image_equal_tofile(reloaded.convert("RGB"), "Tests/images/p_16.png")
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def test_id_field() -> None:
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# tga file with id field
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test_file = "Tests/images/tga_id_field.tga"
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# Act
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with Image.open(test_file) as im:
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# Assert
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assert im.size == (100, 100)
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def test_id_field_rle() -> None:
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# tga file with id field
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test_file = "Tests/images/rgb32rle.tga"
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# Act
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with Image.open(test_file) as im:
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# Assert
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assert im.size == (199, 199)
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def test_cross_scan_line() -> None:
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with Image.open("Tests/images/cross_scan_line.tga") as im:
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assert_image_equal_tofile(im, "Tests/images/cross_scan_line.png")
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with Image.open("Tests/images/cross_scan_line_truncated.tga") as im:
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with pytest.raises(OSError):
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im.load()
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def test_save(tmp_path: Path) -> None:
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test_file = "Tests/images/tga_id_field.tga"
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with Image.open(test_file) as im:
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out = str(tmp_path / "temp.tga")
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# Save
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im.save(out)
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with Image.open(out) as test_im:
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assert test_im.size == (100, 100)
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assert test_im.info["id_section"] == im.info["id_section"]
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# RGBA save
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im.convert("RGBA").save(out)
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with Image.open(out) as test_im:
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assert test_im.size == (100, 100)
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def test_small_palette(tmp_path: Path) -> None:
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im = Image.new("P", (1, 1))
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colors = [0, 0, 0]
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im.putpalette(colors)
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out = str(tmp_path / "temp.tga")
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im.save(out)
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with Image.open(out) as reloaded:
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assert reloaded.getpalette() == colors
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def test_missing_palette() -> None:
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with Image.open("Tests/images/dilation4.lut") as im:
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assert im.mode == "L"
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def test_save_wrong_mode(tmp_path: Path) -> None:
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im = hopper("PA")
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out = str(tmp_path / "temp.tga")
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with pytest.raises(OSError):
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im.save(out)
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def test_save_mapdepth() -> None:
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# This image has been manually hexedited from 200x32_p_bl_raw.tga
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# to include an origin
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test_file = "Tests/images/200x32_p_bl_raw_origin.tga"
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with Image.open(test_file) as im:
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assert_image_equal_tofile(im, "Tests/images/tga/common/200x32_p.png")
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def test_save_id_section(tmp_path: Path) -> None:
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test_file = "Tests/images/rgb32rle.tga"
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with Image.open(test_file) as im:
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out = str(tmp_path / "temp.tga")
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# Check there is no id section
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im.save(out)
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with Image.open(out) as test_im:
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assert "id_section" not in test_im.info
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# Save with custom id section
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im.save(out, id_section=b"Test content")
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with Image.open(out) as test_im:
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assert test_im.info["id_section"] == b"Test content"
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# Save with custom id section greater than 255 characters
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id_section = b"Test content" * 25
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with pytest.warns(UserWarning):
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im.save(out, id_section=id_section)
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with Image.open(out) as test_im:
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assert test_im.info["id_section"] == id_section[:255]
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test_file = "Tests/images/tga_id_field.tga"
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with Image.open(test_file) as im:
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# Save with no id section
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im.save(out, id_section="")
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with Image.open(out) as test_im:
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assert "id_section" not in test_im.info
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def test_save_orientation(tmp_path: Path) -> None:
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test_file = "Tests/images/rgb32rle.tga"
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out = str(tmp_path / "temp.tga")
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with Image.open(test_file) as im:
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assert im.info["orientation"] == -1
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im.save(out, orientation=1)
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with Image.open(out) as test_im:
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assert test_im.info["orientation"] == 1
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def test_horizontal_orientations() -> None:
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# These images have been manually hexedited to have the relevant orientations
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with Image.open("Tests/images/rgb32rle_top_right.tga") as im:
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assert im.load()[90, 90][:3] == (0, 0, 0)
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with Image.open("Tests/images/rgb32rle_bottom_right.tga") as im:
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assert im.load()[90, 90][:3] == (0, 255, 0)
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def test_save_rle(tmp_path: Path) -> None:
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test_file = "Tests/images/rgb32rle.tga"
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with Image.open(test_file) as im:
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assert im.info["compression"] == "tga_rle"
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out = str(tmp_path / "temp.tga")
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# Save
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im.save(out)
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with Image.open(out) as test_im:
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assert test_im.size == (199, 199)
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assert test_im.info["compression"] == "tga_rle"
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# Save without compression
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im.save(out, compression=None)
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with Image.open(out) as test_im:
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assert "compression" not in test_im.info
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# RGBA save
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im.convert("RGBA").save(out)
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with Image.open(out) as test_im:
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assert test_im.size == (199, 199)
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test_file = "Tests/images/tga_id_field.tga"
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with Image.open(test_file) as im:
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assert "compression" not in im.info
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# Save with compression
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im.save(out, compression="tga_rle")
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with Image.open(out) as test_im:
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assert test_im.info["compression"] == "tga_rle"
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def test_save_l_transparency(tmp_path: Path) -> None:
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# There are 559 transparent pixels in la.tga.
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num_transparent = 559
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in_file = "Tests/images/la.tga"
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with Image.open(in_file) as im:
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assert im.mode == "LA"
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assert im.getchannel("A").getcolors()[0][0] == num_transparent
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out = str(tmp_path / "temp.tga")
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im.save(out)
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with Image.open(out) as test_im:
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assert test_im.mode == "LA"
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assert test_im.getchannel("A").getcolors()[0][0] == num_transparent
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assert_image_equal(im, test_im)
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