GDAL: Read Raster Resample Problem

[dengo]

I've noticed a strange problem when trying to read (while resampling) a specific tif.

The following call

GDALDatasetRasterIO(ds, Read, 0, 0, 1063, 2057, buffer, 133, 258, Byte, 3, {1, 2, 3}, 3, 399, 1)

produces garbled pixels in the buffer. The first row seems to be OK, the rest is mostly 0 with some random noise.

1063x2057 is the full size of the raster which is jpg compressed with a block size of 1063x8

I've attached the raster to this issue.

[Even Rouault]

In 39743:

GTiff: fix reading subsampled JPEG-in-TIFF when block height = 8 (fixes #6988)

[Even Rouault]

In 39744:

GTiff: fix reading subsampled JPEG-in-TIFF when block height = 8 (fixes #6988)

[Even Rouault]

In 39745:

GTiff: fix reading subsampled JPEG-in-TIFF when block height = 8 (fixes #6988)

[Even Rouault]

You can also workaround the issue by setting the configuration option / environment variable GTIFF_IMPLICIT_JPEG_OVR to NO

[dengo]

Thanks for the fix and the workaround. Great work as always!