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129 lines
4.3 KiB
Python
129 lines
4.3 KiB
Python
import io
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from PIL import BmpImagePlugin, Image
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from .helper import PillowTestCase, assert_image_equal, hopper
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class TestFileBmp(PillowTestCase):
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def roundtrip(self, im):
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outfile = self.tempfile("temp.bmp")
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im.save(outfile, "BMP")
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with Image.open(outfile) as reloaded:
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reloaded.load()
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self.assertEqual(im.mode, reloaded.mode)
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self.assertEqual(im.size, reloaded.size)
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self.assertEqual(reloaded.format, "BMP")
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self.assertEqual(reloaded.get_format_mimetype(), "image/bmp")
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def test_sanity(self):
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self.roundtrip(hopper())
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self.roundtrip(hopper("1"))
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self.roundtrip(hopper("L"))
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self.roundtrip(hopper("P"))
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self.roundtrip(hopper("RGB"))
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def test_invalid_file(self):
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with open("Tests/images/flower.jpg", "rb") as fp:
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self.assertRaises(SyntaxError, BmpImagePlugin.BmpImageFile, fp)
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def test_save_to_bytes(self):
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output = io.BytesIO()
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im = hopper()
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im.save(output, "BMP")
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output.seek(0)
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with Image.open(output) as reloaded:
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self.assertEqual(im.mode, reloaded.mode)
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self.assertEqual(im.size, reloaded.size)
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self.assertEqual(reloaded.format, "BMP")
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def test_save_too_large(self):
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outfile = self.tempfile("temp.bmp")
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with Image.new("RGB", (1, 1)) as im:
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im._size = (37838, 37838)
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with self.assertRaises(ValueError):
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im.save(outfile)
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def test_dpi(self):
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dpi = (72, 72)
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output = io.BytesIO()
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with hopper() as im:
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im.save(output, "BMP", dpi=dpi)
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output.seek(0)
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with Image.open(output) as reloaded:
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self.assertEqual(reloaded.info["dpi"], dpi)
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def test_save_bmp_with_dpi(self):
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# Test for #1301
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# Arrange
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outfile = self.tempfile("temp.jpg")
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with Image.open("Tests/images/hopper.bmp") as im:
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# Act
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im.save(outfile, "JPEG", dpi=im.info["dpi"])
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# Assert
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with Image.open(outfile) as reloaded:
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reloaded.load()
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self.assertEqual(im.info["dpi"], reloaded.info["dpi"])
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self.assertEqual(im.size, reloaded.size)
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self.assertEqual(reloaded.format, "JPEG")
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def test_load_dpi_rounding(self):
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# Round up
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with Image.open("Tests/images/hopper.bmp") as im:
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self.assertEqual(im.info["dpi"], (96, 96))
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# Round down
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with Image.open("Tests/images/hopper_roundDown.bmp") as im:
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self.assertEqual(im.info["dpi"], (72, 72))
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def test_save_dpi_rounding(self):
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outfile = self.tempfile("temp.bmp")
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with Image.open("Tests/images/hopper.bmp") as im:
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im.save(outfile, dpi=(72.2, 72.2))
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with Image.open(outfile) as reloaded:
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self.assertEqual(reloaded.info["dpi"], (72, 72))
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im.save(outfile, dpi=(72.8, 72.8))
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with Image.open(outfile) as reloaded:
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self.assertEqual(reloaded.info["dpi"], (73, 73))
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def test_load_dib(self):
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# test for #1293, Imagegrab returning Unsupported Bitfields Format
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with Image.open("Tests/images/clipboard.dib") as im:
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self.assertEqual(im.format, "DIB")
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self.assertEqual(im.get_format_mimetype(), "image/bmp")
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with Image.open("Tests/images/clipboard_target.png") as target:
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assert_image_equal(im, target)
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def test_save_dib(self):
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outfile = self.tempfile("temp.dib")
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with Image.open("Tests/images/clipboard.dib") as im:
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im.save(outfile)
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with Image.open(outfile) as reloaded:
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self.assertEqual(reloaded.format, "DIB")
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self.assertEqual(reloaded.get_format_mimetype(), "image/bmp")
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assert_image_equal(im, reloaded)
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def test_rgba_bitfields(self):
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# This test image has been manually hexedited
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# to change the bitfield compression in the header from XBGR to RGBA
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with Image.open("Tests/images/rgb32bf-rgba.bmp") as im:
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# So before the comparing the image, swap the channels
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b, g, r = im.split()[1:]
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im = Image.merge("RGB", (r, g, b))
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with Image.open("Tests/images/bmp/q/rgb32bf-xbgr.bmp") as target:
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assert_image_equal(im, target)
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