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diff --git a/doc/tools/tiffcmp.rst b/doc/tools/tiffcmp.rst new file mode 100644 index 00000000..25c4be62 --- /dev/null +++ b/doc/tools/tiffcmp.rst @@ -0,0 +1,59 @@ +tiff2cmp +======== + +.. program:: tiffcmp + +Synopsis +-------- + +**tiffcmp** [ *options* ] *file1.tif* *file2.tif* + +Description +----------- + +:program:`tiffcmp` compares the tags and data in two files created according +to the Tagged Image File Format, Revision 6.0. +The schemes used for compressing data in each file +are immaterial when data are compared\-data are compared on +a scanline-by-scanline basis after decompression. +Most directory tags are checked; notable exceptions are: +``GrayResponseCurve``, ``ColorResponseCurve``, and ``ColorMap`` tags. +Data will not be compared if any of the ``BitsPerSample``, +``SamplesPerPixel``, or ``ImageWidth`` values are not equal. +By default, :program:`tiffcmp` will terminate if it encounters any difference. + +Options +------- + +.. option:: -l + + List each byte of image data that differs between the files. + +.. option:: -z number + + List specified number of image data bytes that differs between the files. + +.. option:: -t + + Ignore any differences in directory tags. + +Bugs +---- + +Tags that are not recognized by the library are not +compared; they may also generate spurious diagnostics. + +The image data of tiled files is not compared, since the :c:func:`TIFFReadScanline` +function is used. An error will be reported for tiled files. + +The pixel and/or sample number reported in differences may be off +in some exotic cases. + +See also +-------- + +:doc:`pal2rgb` (1), +:doc:`tiffinfo` (1), +:doc:`tiffcp` (1), +:doc:`tiffmedian` (1), +:doc:`/man/libtiff` (3tiff) |