Added BigTIFF reading #6097
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Added BigTIFF reading #6097
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radarhere
commented
Feb 28, 2022
| @@ -3458,10 +3460,18 @@ def _get_ifd_dict(self, offset): | |||
| return self._fixup_dict(info) | |||
|
|
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| def _get_head(self): | |||
| version = b"\x2B" if self.bigtiff else b"\x2A" | |||
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\x2B is 43, and \x2A is 42, as per https://www.awaresystems.be/imaging/tiff/bigtiff.html
radarhere
commented
Feb 28, 2022
| @@ -699,6 +704,7 @@ def _register_basic(idx_fmt_name): | |||
| (TiffTags.FLOAT, "f", "float"), | |||
| (TiffTags.DOUBLE, "d", "double"), | |||
| (TiffTags.IFD, "L", "long"), | |||
| (TiffTags.LONG8, "Q", "long8"), | |||
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https://www.awaresystems.be/imaging/tiff/bigtiff.html
The StripOffsets, StripByteCounts, TileOffsets, and TileByteCounts tags are allowed to have the datatype TIFF_LONG8 in BigTIFF.
hugovk
approved these changes
Mar 10, 2022
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Resolves #4513
See https://www.awaresystems.be/imaging/tiff/bigtiff.html for a documentation reference.
The test image was created with
convert hopper.tif TIFF64:hopper_bigtiff.tif.