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689 lines
22 KiB
Python
689 lines
22 KiB
Python
import pytest
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from PIL import Image, ImageSequence, PngImagePlugin
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# APNG browser support tests and fixtures via:
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# https://philip.html5.org/tests/apng/tests.html
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# (referenced from https://wiki.mozilla.org/APNG_Specification)
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def test_apng_basic():
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with Image.open("Tests/images/apng/single_frame.png") as im:
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assert not im.is_animated
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assert im.n_frames == 1
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assert im.get_format_mimetype() == "image/apng"
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assert im.info.get("default_image") is None
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assert im.getpixel((0, 0)) == (0, 255, 0, 255)
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assert im.getpixel((64, 32)) == (0, 255, 0, 255)
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with Image.open("Tests/images/apng/single_frame_default.png") as im:
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assert im.is_animated
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assert im.n_frames == 2
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assert im.get_format_mimetype() == "image/apng"
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assert im.info.get("default_image")
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assert im.getpixel((0, 0)) == (255, 0, 0, 255)
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assert im.getpixel((64, 32)) == (255, 0, 0, 255)
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im.seek(1)
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assert im.getpixel((0, 0)) == (0, 255, 0, 255)
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assert im.getpixel((64, 32)) == (0, 255, 0, 255)
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# test out of bounds seek
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with pytest.raises(EOFError):
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im.seek(2)
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# test rewind support
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im.seek(0)
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assert im.getpixel((0, 0)) == (255, 0, 0, 255)
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assert im.getpixel((64, 32)) == (255, 0, 0, 255)
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im.seek(1)
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assert im.getpixel((0, 0)) == (0, 255, 0, 255)
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assert im.getpixel((64, 32)) == (0, 255, 0, 255)
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@pytest.mark.parametrize(
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"filename",
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("Tests/images/apng/split_fdat.png", "Tests/images/apng/split_fdat_zero_chunk.png"),
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)
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def test_apng_fdat(filename):
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with Image.open(filename) as im:
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (0, 255, 0, 255)
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assert im.getpixel((64, 32)) == (0, 255, 0, 255)
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def test_apng_dispose():
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with Image.open("Tests/images/apng/dispose_op_none.png") as im:
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (0, 255, 0, 255)
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assert im.getpixel((64, 32)) == (0, 255, 0, 255)
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with Image.open("Tests/images/apng/dispose_op_background.png") as im:
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (0, 0, 0, 0)
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assert im.getpixel((64, 32)) == (0, 0, 0, 0)
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with Image.open("Tests/images/apng/dispose_op_background_final.png") as im:
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (0, 255, 0, 255)
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assert im.getpixel((64, 32)) == (0, 255, 0, 255)
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with Image.open("Tests/images/apng/dispose_op_previous.png") as im:
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (0, 255, 0, 255)
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assert im.getpixel((64, 32)) == (0, 255, 0, 255)
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with Image.open("Tests/images/apng/dispose_op_previous_final.png") as im:
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (0, 255, 0, 255)
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assert im.getpixel((64, 32)) == (0, 255, 0, 255)
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with Image.open("Tests/images/apng/dispose_op_previous_first.png") as im:
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (0, 0, 0, 0)
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assert im.getpixel((64, 32)) == (0, 0, 0, 0)
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def test_apng_dispose_region():
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with Image.open("Tests/images/apng/dispose_op_none_region.png") as im:
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (0, 255, 0, 255)
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assert im.getpixel((64, 32)) == (0, 255, 0, 255)
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with Image.open("Tests/images/apng/dispose_op_background_before_region.png") as im:
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (0, 0, 0, 0)
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assert im.getpixel((64, 32)) == (0, 0, 0, 0)
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with Image.open("Tests/images/apng/dispose_op_background_region.png") as im:
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (0, 0, 255, 255)
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assert im.getpixel((64, 32)) == (0, 0, 0, 0)
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with Image.open("Tests/images/apng/dispose_op_previous_region.png") as im:
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (0, 255, 0, 255)
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assert im.getpixel((64, 32)) == (0, 255, 0, 255)
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def test_apng_dispose_op_previous_frame():
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# Test that the dispose settings being used are from the previous frame
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#
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# Image created with:
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# red = Image.new("RGBA", (128, 64), (255, 0, 0, 255))
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# green = red.copy()
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# green.paste(Image.new("RGBA", (64, 32), (0, 255, 0, 255)))
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# blue = red.copy()
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# blue.paste(Image.new("RGBA", (64, 32), (0, 255, 0, 255)), (64, 32))
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#
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# red.save(
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# "Tests/images/apng/dispose_op_previous_frame.png",
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# save_all=True,
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# append_images=[green, blue],
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# disposal=[
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# PngImagePlugin.Disposal.OP_NONE,
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# PngImagePlugin.Disposal.OP_PREVIOUS,
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# PngImagePlugin.Disposal.OP_PREVIOUS
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# ],
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# )
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with Image.open("Tests/images/apng/dispose_op_previous_frame.png") as im:
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (255, 0, 0, 255)
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def test_apng_dispose_op_background_p_mode():
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with Image.open("Tests/images/apng/dispose_op_background_p_mode.png") as im:
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im.seek(1)
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im.load()
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assert im.size == (128, 64)
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def test_apng_blend():
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with Image.open("Tests/images/apng/blend_op_source_solid.png") as im:
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (0, 255, 0, 255)
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assert im.getpixel((64, 32)) == (0, 255, 0, 255)
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with Image.open("Tests/images/apng/blend_op_source_transparent.png") as im:
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (0, 0, 0, 0)
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assert im.getpixel((64, 32)) == (0, 0, 0, 0)
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with Image.open("Tests/images/apng/blend_op_source_near_transparent.png") as im:
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (0, 255, 0, 2)
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assert im.getpixel((64, 32)) == (0, 255, 0, 2)
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with Image.open("Tests/images/apng/blend_op_over.png") as im:
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (0, 255, 0, 255)
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assert im.getpixel((64, 32)) == (0, 255, 0, 255)
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with Image.open("Tests/images/apng/blend_op_over_near_transparent.png") as im:
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (0, 255, 0, 97)
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assert im.getpixel((64, 32)) == (0, 255, 0, 255)
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def test_apng_blend_transparency():
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with Image.open("Tests/images/blend_transparency.png") as im:
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im.seek(1)
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assert im.getpixel((0, 0)) == (255, 0, 0)
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def test_apng_chunk_order():
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with Image.open("Tests/images/apng/fctl_actl.png") as im:
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (0, 255, 0, 255)
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assert im.getpixel((64, 32)) == (0, 255, 0, 255)
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def test_apng_delay():
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with Image.open("Tests/images/apng/delay.png") as im:
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im.seek(1)
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assert im.info.get("duration") == 500.0
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im.seek(2)
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assert im.info.get("duration") == 1000.0
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im.seek(3)
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assert im.info.get("duration") == 500.0
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im.seek(4)
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assert im.info.get("duration") == 1000.0
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with Image.open("Tests/images/apng/delay_round.png") as im:
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im.seek(1)
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assert im.info.get("duration") == 500.0
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im.seek(2)
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assert im.info.get("duration") == 1000.0
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with Image.open("Tests/images/apng/delay_short_max.png") as im:
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im.seek(1)
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assert im.info.get("duration") == 500.0
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im.seek(2)
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assert im.info.get("duration") == 1000.0
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with Image.open("Tests/images/apng/delay_zero_denom.png") as im:
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im.seek(1)
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assert im.info.get("duration") == 500.0
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im.seek(2)
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assert im.info.get("duration") == 1000.0
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with Image.open("Tests/images/apng/delay_zero_numer.png") as im:
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im.seek(1)
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assert im.info.get("duration") == 0.0
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im.seek(2)
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assert im.info.get("duration") == 0.0
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im.seek(3)
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assert im.info.get("duration") == 500.0
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im.seek(4)
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assert im.info.get("duration") == 1000.0
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def test_apng_num_plays():
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with Image.open("Tests/images/apng/num_plays.png") as im:
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assert im.info.get("loop") == 0
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with Image.open("Tests/images/apng/num_plays_1.png") as im:
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assert im.info.get("loop") == 1
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def test_apng_mode():
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with Image.open("Tests/images/apng/mode_16bit.png") as im:
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assert im.mode == "RGBA"
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (0, 0, 128, 191)
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assert im.getpixel((64, 32)) == (0, 0, 128, 191)
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with Image.open("Tests/images/apng/mode_grayscale.png") as im:
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assert im.mode == "L"
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == 128
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assert im.getpixel((64, 32)) == 255
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with Image.open("Tests/images/apng/mode_grayscale_alpha.png") as im:
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assert im.mode == "LA"
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im.seek(im.n_frames - 1)
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assert im.getpixel((0, 0)) == (128, 191)
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assert im.getpixel((64, 32)) == (128, 191)
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with Image.open("Tests/images/apng/mode_palette.png") as im:
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assert im.mode == "P"
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im.seek(im.n_frames - 1)
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im = im.convert("RGB")
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assert im.getpixel((0, 0)) == (0, 255, 0)
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assert im.getpixel((64, 32)) == (0, 255, 0)
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with Image.open("Tests/images/apng/mode_palette_alpha.png") as im:
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assert im.mode == "P"
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im.seek(im.n_frames - 1)
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im = im.convert("RGBA")
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assert im.getpixel((0, 0)) == (255, 0, 0, 0)
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assert im.getpixel((64, 32)) == (255, 0, 0, 0)
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with Image.open("Tests/images/apng/mode_palette_1bit_alpha.png") as im:
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assert im.mode == "P"
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im.seek(im.n_frames - 1)
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im = im.convert("RGBA")
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assert im.getpixel((0, 0)) == (0, 0, 255, 128)
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assert im.getpixel((64, 32)) == (0, 0, 255, 128)
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def test_apng_chunk_errors():
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with Image.open("Tests/images/apng/chunk_no_actl.png") as im:
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assert not im.is_animated
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with pytest.warns(UserWarning):
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with Image.open("Tests/images/apng/chunk_multi_actl.png") as im:
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im.load()
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assert not im.is_animated
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with Image.open("Tests/images/apng/chunk_actl_after_idat.png") as im:
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assert not im.is_animated
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with Image.open("Tests/images/apng/chunk_no_fctl.png") as im:
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with pytest.raises(SyntaxError):
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im.seek(im.n_frames - 1)
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with Image.open("Tests/images/apng/chunk_repeat_fctl.png") as im:
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with pytest.raises(SyntaxError):
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im.seek(im.n_frames - 1)
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with Image.open("Tests/images/apng/chunk_no_fdat.png") as im:
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with pytest.raises(SyntaxError):
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im.seek(im.n_frames - 1)
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def test_apng_syntax_errors():
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with pytest.warns(UserWarning):
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with Image.open("Tests/images/apng/syntax_num_frames_zero.png") as im:
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assert not im.is_animated
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with pytest.raises(OSError):
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im.load()
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with pytest.warns(UserWarning):
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with Image.open("Tests/images/apng/syntax_num_frames_zero_default.png") as im:
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assert not im.is_animated
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im.load()
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# we can handle this case gracefully
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exception = None
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with Image.open("Tests/images/apng/syntax_num_frames_low.png") as im:
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try:
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im.seek(im.n_frames - 1)
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except Exception as e:
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exception = e
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assert exception is None
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with pytest.raises(OSError):
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with Image.open("Tests/images/apng/syntax_num_frames_high.png") as im:
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im.seek(im.n_frames - 1)
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im.load()
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with pytest.warns(UserWarning):
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with Image.open("Tests/images/apng/syntax_num_frames_invalid.png") as im:
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assert not im.is_animated
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im.load()
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@pytest.mark.parametrize(
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"test_file",
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(
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"sequence_start.png",
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"sequence_gap.png",
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"sequence_repeat.png",
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"sequence_repeat_chunk.png",
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"sequence_reorder.png",
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"sequence_reorder_chunk.png",
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"sequence_fdat_fctl.png",
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),
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)
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def test_apng_sequence_errors(test_file):
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with pytest.raises(SyntaxError):
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with Image.open(f"Tests/images/apng/{test_file}") as im:
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im.seek(im.n_frames - 1)
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im.load()
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def test_apng_save(tmp_path):
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with Image.open("Tests/images/apng/single_frame.png") as im:
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test_file = str(tmp_path / "temp.png")
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im.save(test_file, save_all=True)
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with Image.open(test_file) as im:
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im.load()
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assert not im.is_animated
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assert im.n_frames == 1
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assert im.get_format_mimetype() == "image/apng"
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assert im.info.get("default_image") is None
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assert im.getpixel((0, 0)) == (0, 255, 0, 255)
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assert im.getpixel((64, 32)) == (0, 255, 0, 255)
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with Image.open("Tests/images/apng/single_frame_default.png") as im:
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frames = []
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for frame_im in ImageSequence.Iterator(im):
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frames.append(frame_im.copy())
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frames[0].save(
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test_file, save_all=True, default_image=True, append_images=frames[1:]
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)
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with Image.open(test_file) as im:
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im.load()
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assert im.is_animated
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assert im.n_frames == 2
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assert im.get_format_mimetype() == "image/apng"
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assert im.info.get("default_image")
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im.seek(1)
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assert im.getpixel((0, 0)) == (0, 255, 0, 255)
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assert im.getpixel((64, 32)) == (0, 255, 0, 255)
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def test_apng_save_alpha(tmp_path):
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test_file = str(tmp_path / "temp.png")
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im = Image.new("RGBA", (1, 1), (255, 0, 0, 255))
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im2 = Image.new("RGBA", (1, 1), (255, 0, 0, 127))
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im.save(test_file, save_all=True, append_images=[im2])
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with Image.open(test_file) as reloaded:
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assert reloaded.getpixel((0, 0)) == (255, 0, 0, 255)
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reloaded.seek(1)
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assert reloaded.getpixel((0, 0)) == (255, 0, 0, 127)
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def test_apng_save_split_fdat(tmp_path):
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# test to make sure we do not generate sequence errors when writing
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# frames with image data spanning multiple fdAT chunks (in this case
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# both the default image and first animation frame will span multiple
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# data chunks)
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test_file = str(tmp_path / "temp.png")
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with Image.open("Tests/images/old-style-jpeg-compression.png") as im:
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frames = [im.copy(), Image.new("RGBA", im.size, (255, 0, 0, 255))]
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im.save(
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test_file,
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save_all=True,
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default_image=True,
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append_images=frames,
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)
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with Image.open(test_file) as im:
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exception = None
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try:
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im.seek(im.n_frames - 1)
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im.load()
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except Exception as e:
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exception = e
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assert exception is None
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def test_apng_save_duration_loop(tmp_path):
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test_file = str(tmp_path / "temp.png")
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with Image.open("Tests/images/apng/delay.png") as im:
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frames = []
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durations = []
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loop = im.info.get("loop")
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default_image = im.info.get("default_image")
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for i, frame_im in enumerate(ImageSequence.Iterator(im)):
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frames.append(frame_im.copy())
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if i != 0 or not default_image:
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durations.append(frame_im.info.get("duration", 0))
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frames[0].save(
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test_file,
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save_all=True,
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default_image=default_image,
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append_images=frames[1:],
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duration=durations,
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loop=loop,
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)
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with Image.open(test_file) as im:
|
|
im.load()
|
|
assert im.info.get("loop") == loop
|
|
im.seek(1)
|
|
assert im.info.get("duration") == 500.0
|
|
im.seek(2)
|
|
assert im.info.get("duration") == 1000.0
|
|
im.seek(3)
|
|
assert im.info.get("duration") == 500.0
|
|
im.seek(4)
|
|
assert im.info.get("duration") == 1000.0
|
|
|
|
# test removal of duplicated frames
|
|
frame = Image.new("RGBA", (128, 64), (255, 0, 0, 255))
|
|
frame.save(
|
|
test_file, save_all=True, append_images=[frame, frame], duration=[500, 100, 150]
|
|
)
|
|
with Image.open(test_file) as im:
|
|
im.load()
|
|
assert im.n_frames == 1
|
|
assert im.info.get("duration") == 750
|
|
|
|
# test info duration
|
|
frame.info["duration"] = 750
|
|
frame.save(test_file, save_all=True)
|
|
with Image.open(test_file) as im:
|
|
assert im.info.get("duration") == 750
|
|
|
|
|
|
def test_apng_save_duplicate_duration(tmp_path):
|
|
test_file = str(tmp_path / "temp.png")
|
|
frame = Image.new("RGB", (1, 1))
|
|
|
|
# Test a single duration is correctly combined across duplicate frames
|
|
frame.save(test_file, save_all=True, append_images=[frame, frame], duration=500)
|
|
with Image.open(test_file) as im:
|
|
assert im.n_frames == 1
|
|
assert im.info.get("duration") == 1500
|
|
|
|
|
|
def test_apng_save_disposal(tmp_path):
|
|
test_file = str(tmp_path / "temp.png")
|
|
size = (128, 64)
|
|
red = Image.new("RGBA", size, (255, 0, 0, 255))
|
|
green = Image.new("RGBA", size, (0, 255, 0, 255))
|
|
transparent = Image.new("RGBA", size, (0, 0, 0, 0))
|
|
|
|
# test OP_NONE
|
|
red.save(
|
|
test_file,
|
|
save_all=True,
|
|
append_images=[green, transparent],
|
|
disposal=PngImagePlugin.Disposal.OP_NONE,
|
|
blend=PngImagePlugin.Blend.OP_OVER,
|
|
)
|
|
with Image.open(test_file) as im:
|
|
im.seek(2)
|
|
assert im.getpixel((0, 0)) == (0, 255, 0, 255)
|
|
assert im.getpixel((64, 32)) == (0, 255, 0, 255)
|
|
|
|
# test OP_BACKGROUND
|
|
disposal = [
|
|
PngImagePlugin.Disposal.OP_NONE,
|
|
PngImagePlugin.Disposal.OP_BACKGROUND,
|
|
PngImagePlugin.Disposal.OP_NONE,
|
|
]
|
|
red.save(
|
|
test_file,
|
|
save_all=True,
|
|
append_images=[red, transparent],
|
|
disposal=disposal,
|
|
blend=PngImagePlugin.Blend.OP_OVER,
|
|
)
|
|
with Image.open(test_file) as im:
|
|
im.seek(2)
|
|
assert im.getpixel((0, 0)) == (0, 0, 0, 0)
|
|
assert im.getpixel((64, 32)) == (0, 0, 0, 0)
|
|
|
|
disposal = [
|
|
PngImagePlugin.Disposal.OP_NONE,
|
|
PngImagePlugin.Disposal.OP_BACKGROUND,
|
|
]
|
|
red.save(
|
|
test_file,
|
|
save_all=True,
|
|
append_images=[green],
|
|
disposal=disposal,
|
|
blend=PngImagePlugin.Blend.OP_OVER,
|
|
)
|
|
with Image.open(test_file) as im:
|
|
im.seek(1)
|
|
assert im.getpixel((0, 0)) == (0, 255, 0, 255)
|
|
assert im.getpixel((64, 32)) == (0, 255, 0, 255)
|
|
|
|
# test OP_PREVIOUS
|
|
disposal = [
|
|
PngImagePlugin.Disposal.OP_NONE,
|
|
PngImagePlugin.Disposal.OP_PREVIOUS,
|
|
PngImagePlugin.Disposal.OP_NONE,
|
|
]
|
|
red.save(
|
|
test_file,
|
|
save_all=True,
|
|
append_images=[green, red, transparent],
|
|
default_image=True,
|
|
disposal=disposal,
|
|
blend=PngImagePlugin.Blend.OP_OVER,
|
|
)
|
|
with Image.open(test_file) as im:
|
|
im.seek(3)
|
|
assert im.getpixel((0, 0)) == (0, 255, 0, 255)
|
|
assert im.getpixel((64, 32)) == (0, 255, 0, 255)
|
|
|
|
disposal = [
|
|
PngImagePlugin.Disposal.OP_NONE,
|
|
PngImagePlugin.Disposal.OP_PREVIOUS,
|
|
]
|
|
red.save(
|
|
test_file,
|
|
save_all=True,
|
|
append_images=[green],
|
|
disposal=disposal,
|
|
blend=PngImagePlugin.Blend.OP_OVER,
|
|
)
|
|
with Image.open(test_file) as im:
|
|
im.seek(1)
|
|
assert im.getpixel((0, 0)) == (0, 255, 0, 255)
|
|
assert im.getpixel((64, 32)) == (0, 255, 0, 255)
|
|
|
|
# test info disposal
|
|
red.info["disposal"] = PngImagePlugin.Disposal.OP_BACKGROUND
|
|
red.save(
|
|
test_file,
|
|
save_all=True,
|
|
append_images=[Image.new("RGBA", (10, 10), (0, 255, 0, 255))],
|
|
)
|
|
with Image.open(test_file) as im:
|
|
im.seek(1)
|
|
assert im.getpixel((64, 32)) == (0, 0, 0, 0)
|
|
|
|
|
|
def test_apng_save_disposal_previous(tmp_path):
|
|
test_file = str(tmp_path / "temp.png")
|
|
size = (128, 64)
|
|
blue = Image.new("RGBA", size, (0, 0, 255, 255))
|
|
red = Image.new("RGBA", size, (255, 0, 0, 255))
|
|
green = Image.new("RGBA", size, (0, 255, 0, 255))
|
|
|
|
# test OP_NONE
|
|
blue.save(
|
|
test_file,
|
|
save_all=True,
|
|
append_images=[red, green],
|
|
disposal=PngImagePlugin.Disposal.OP_PREVIOUS,
|
|
)
|
|
with Image.open(test_file) as im:
|
|
assert im.getpixel((0, 0)) == (0, 0, 255, 255)
|
|
|
|
im.seek(2)
|
|
assert im.getpixel((0, 0)) == (0, 255, 0, 255)
|
|
assert im.getpixel((64, 32)) == (0, 255, 0, 255)
|
|
|
|
|
|
def test_apng_save_blend(tmp_path):
|
|
test_file = str(tmp_path / "temp.png")
|
|
size = (128, 64)
|
|
red = Image.new("RGBA", size, (255, 0, 0, 255))
|
|
green = Image.new("RGBA", size, (0, 255, 0, 255))
|
|
transparent = Image.new("RGBA", size, (0, 0, 0, 0))
|
|
|
|
# test OP_SOURCE on solid color
|
|
blend = [
|
|
PngImagePlugin.Blend.OP_OVER,
|
|
PngImagePlugin.Blend.OP_SOURCE,
|
|
]
|
|
red.save(
|
|
test_file,
|
|
save_all=True,
|
|
append_images=[red, green],
|
|
default_image=True,
|
|
disposal=PngImagePlugin.Disposal.OP_NONE,
|
|
blend=blend,
|
|
)
|
|
with Image.open(test_file) as im:
|
|
im.seek(2)
|
|
assert im.getpixel((0, 0)) == (0, 255, 0, 255)
|
|
assert im.getpixel((64, 32)) == (0, 255, 0, 255)
|
|
|
|
# test OP_SOURCE on transparent color
|
|
blend = [
|
|
PngImagePlugin.Blend.OP_OVER,
|
|
PngImagePlugin.Blend.OP_SOURCE,
|
|
]
|
|
red.save(
|
|
test_file,
|
|
save_all=True,
|
|
append_images=[red, transparent],
|
|
default_image=True,
|
|
disposal=PngImagePlugin.Disposal.OP_NONE,
|
|
blend=blend,
|
|
)
|
|
with Image.open(test_file) as im:
|
|
im.seek(2)
|
|
assert im.getpixel((0, 0)) == (0, 0, 0, 0)
|
|
assert im.getpixel((64, 32)) == (0, 0, 0, 0)
|
|
|
|
# test OP_OVER
|
|
red.save(
|
|
test_file,
|
|
save_all=True,
|
|
append_images=[green, transparent],
|
|
default_image=True,
|
|
disposal=PngImagePlugin.Disposal.OP_NONE,
|
|
blend=PngImagePlugin.Blend.OP_OVER,
|
|
)
|
|
with Image.open(test_file) as im:
|
|
im.seek(1)
|
|
assert im.getpixel((0, 0)) == (0, 255, 0, 255)
|
|
assert im.getpixel((64, 32)) == (0, 255, 0, 255)
|
|
im.seek(2)
|
|
assert im.getpixel((0, 0)) == (0, 255, 0, 255)
|
|
assert im.getpixel((64, 32)) == (0, 255, 0, 255)
|
|
|
|
# test info blend
|
|
red.info["blend"] = PngImagePlugin.Blend.OP_OVER
|
|
red.save(test_file, save_all=True, append_images=[green, transparent])
|
|
with Image.open(test_file) as im:
|
|
im.seek(2)
|
|
assert im.getpixel((0, 0)) == (0, 255, 0, 255)
|
|
|
|
|
|
def test_seek_after_close():
|
|
im = Image.open("Tests/images/apng/delay.png")
|
|
im.seek(1)
|
|
im.close()
|
|
|
|
with pytest.raises(ValueError):
|
|
im.seek(0)
|
|
|
|
|
|
@pytest.mark.parametrize("mode", ("RGBA", "RGB", "P"))
|
|
@pytest.mark.parametrize("default_image", (True, False))
|
|
def test_different_modes_in_later_frames(mode, default_image, tmp_path):
|
|
test_file = str(tmp_path / "temp.png")
|
|
|
|
im = Image.new("L", (1, 1))
|
|
im.save(
|
|
test_file,
|
|
save_all=True,
|
|
default_image=default_image,
|
|
append_images=[Image.new(mode, (1, 1))],
|
|
)
|
|
with Image.open(test_file) as reloaded:
|
|
assert reloaded.mode == mode
|