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Swap pixel values on Big Endian

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This commit is contained in:
Konstantin Kopachev 2021-01-11 22:06:49 -08:00 committed by Eric Soroos
parent 169bb4842f
commit 4c2dfadf26
2 changed files with 8 additions and 2 deletions
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2
Tests/test_file_libtiff.py
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@ -17,7 +17,6 @@ from .helper import (
assert_image_similar,
assert_image_similar_tofile,
hopper,
is_big_endian,
skip_unless_feature,
)
@ -892,7 +891,6 @@ class TestFileLibTiff(LibTiffTestCase):
with Image.open("Tests/images/tiff_strip_planar_16bit_RGBa.tiff") as im:
assert_image_equal_tofile(im, "Tests/images/tiff_16bit_RGBa_target.png")
@pytest.mark.xfail(is_big_endian(), reason="Fails on big-endian")
def test_old_style_jpeg(self):
infile = "Tests/images/old-style-jpeg-compression.tif"
with Image.open(infile) as im:

8
src/libImaging/TiffDecode.c
View File

@ -292,6 +292,10 @@ _decodeStripYCbCr(Imaging im, ImagingCodecState state, TIFF *tiff) {
goto decodeycbcr_err;
}
#if WORDS_BIGENDIAN
TIFFSwabArrayOfLong((UINT32 *)state->buffer, img.width * rows_to_read);
#endif
TRACE(("Decoded strip for row %d \n", state->y));
// iterate over each row in the strip and stuff data into image
@ -623,6 +627,10 @@ ImagingLibTiffDecode(
state->errcode = IMAGING_CODEC_BROKEN;
goto decode_err;
}
#if WORDS_BIGENDIAN
TIFFSwabArrayOfLong((UINT32 *)state->buffer, tile_width * tile_length);
#endif
} else {
if (TIFFReadTile(tiff, (tdata_t)state->buffer, x, y, 0, plane) == -1) {
TRACE(("Decode Error, Tile at %dx%d\n", x, y));