78 lines
2.3 KiB
Python
78 lines
2.3 KiB
Python
"""
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cairocffi.test_pixbuf
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~~~~~~~~~~~~~~~~~~~~~
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Test suite for cairocffi.pixbuf.
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:copyright: Copyright 2013-2019 by Simon Sapin
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:license: BSD, see LICENSE for details.
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"""
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import base64
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import sys
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import zlib
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import pytest
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from . import constants, pixbuf
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PNG_BYTES = base64.b64decode(
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b'iVBORw0KGgoAAAANSUhEUgAAAAMAAAACCAYAAACddGYaAAAAE0lEQV'
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b'QI12NkaPjfwAAFTAxIAAAuNwIDqJbDRgAAAABJRU5ErkJggg==')
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JPEG_BYTES = zlib.decompress(base64.b64decode(
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b'eJylzb0JgFAMBOA704hYvIC9oygIou7nPFq4g3+Nm0RT+iy9VPkIF9vsQhjavgVJdM/ATjS'
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b'+/YqX/O2gzdAUCUSoSJSitAUFiHdS1xArXBlr5qrf2wO58HkiigrlWK+T7TezChqU'))
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def test_api():
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with pytest.raises(pixbuf.ImageLoadingError):
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pixbuf.decode_to_image_surface(b'')
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with pytest.raises(pixbuf.ImageLoadingError):
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pixbuf.decode_to_image_surface(b'Not a valid image.')
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with pytest.raises(pixbuf.ImageLoadingError):
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pixbuf.decode_to_image_surface(PNG_BYTES[:10])
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surface, format_name = pixbuf.decode_to_image_surface(PNG_BYTES)
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assert format_name == 'png'
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assert_decoded(surface)
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def test_gdk():
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if pixbuf.gdk is None:
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pytest.xfail()
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pixbuf_obj, format_name = pixbuf.decode_to_pixbuf(PNG_BYTES)
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assert format_name == 'png'
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assert_decoded(pixbuf.pixbuf_to_cairo_gdk(pixbuf_obj))
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def test_slices():
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pixbuf_obj, format_name = pixbuf.decode_to_pixbuf(PNG_BYTES)
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assert format_name == 'png'
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assert_decoded(pixbuf.pixbuf_to_cairo_png(pixbuf_obj))
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def test_size():
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pixbuf_obj, format_name = pixbuf.decode_to_pixbuf(PNG_BYTES, 10, 10)
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assert format_name == 'png'
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surface = pixbuf.pixbuf_to_cairo_png(pixbuf_obj)
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assert surface.get_width() == 10
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assert surface.get_height() == 10
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assert surface.get_format() == constants.FORMAT_ARGB32
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def test_png():
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pixbuf_obj, format_name = pixbuf.decode_to_pixbuf(JPEG_BYTES)
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assert format_name == 'jpeg'
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assert_decoded(pixbuf.pixbuf_to_cairo_slices(pixbuf_obj),
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constants.FORMAT_RGB24, b'\xff\x00\x80\xff')
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def assert_decoded(surface, format_=constants.FORMAT_ARGB32,
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rgba=b'\x80\x00\x40\x80'):
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assert surface.get_width() == 3
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assert surface.get_height() == 2
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assert surface.get_format() == format_
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if sys.byteorder == 'little': # pragma: no cover
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rgba = rgba[::-1]
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assert surface.get_data()[:] == rgba * 6
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