Changes in TIFF v3.4beta028 — LibTIFF 4.7.1 documentation

# Changes in TIFF v3.4beta028

References
Current Version | v3.4beta028 (no release tag)
Previous Version | v3.4beta024
Master Download Site | ftp://ftp.sgi.com/graphics/tiff/

This document describes the changes made to the software between the previous and current versions (see above). If you don't find something listed here, then it was not done in this timeframe, or it was not considered important enough to be mentioned. The following information is located here:

## Software configuration changes

- a "`-noninteractive`" flag was added to configure to control whether or not it prints and prompts for configuration information

- various typos and fixes were made in configure for the the library-only build support (this and other configure fixes from Richard Mlynarik)

- bugs were fixed in the handling of pathnames supplied for external packages; e.g. `DIR_JPEG`

- the handling of `SETMAKE` is now done properly

- the default prototype function declaration for `pow()` was corrected

- a bug was fixed in `libtiff/Makefile.in` that caused installation to fail on systems without DSO support

## Library changes

- Acorn RISC O/S support that was accidentally left out of the left out of the previous distribution is present (from Peter Greenham)

- complaints about unknown and/or unsupported codecs have been delayed until they are invoked; this permits applications to open images and look at tags even if the image data is compressed with an unknown/unsupported compression scheme

- bugs in handling unknown tags have been corrected; applications that use multiple codecs, each with codec-specific tags, no longer generate confusing error messages

- a missing pseudo-tag definition in the CCITT G3 codec was fixed (this problem caused core dumps in the tiffcp program)

- pseudo-tags are now treated specially; they are always considered to be set (i.e. they do not use bits in the `FIELD_*` bit-vectors).

- the use of strip chopping can now be controlled on a per-file basis through a mode parameter supplied when opening a file ("`C`" to enable strip chopping and "`c`" to disable)

- two bugs were fixed in the writing of opposite-endian byte-order files

- support was added for three new fax-related tags registered to SGI: `FaxRecvParams`, `FaxRecvTime`, and `FaxSubAddress`

- the bit order of image data read and written can now be controlled on a per-file basis through a mode parameter supplied when opening a file ("`B`" to force MSB2LSB bit order, "`L`" for LSB2MSB bit order, and "`H`" for the bit order of the native CPU)

- the byte order of image and tag data written to newly-created files can now be controlled on a per-file basis through a mode parameter supplied when opening a file ("`b`" to force Big-Endian byte order and "`l`" to force Little-Endian byte order)

- the use memory-mapped files for images opened read-only can now be controlled on a per-file basis through a mode parameter supplied when opening a file ("`M`" to enable use of memory-mapped files and "`m`" to disable use)

- the use of the `WIN32` define in `tiffiop.h` has been replaced by `__WIN32__`

## Tools changes

- fax2ps now does a `save` and `restore` around each page of PostScript; this fixes a problem with VM overflow when printing a many-page document on some printers

- a bug in the handling of 3-channel images by ras2tiff was fixed

- tiffcp has new options to control the byte order of newly created files: "`-B`" for Big-Endian byte order, "`-L`" for Little-Endian byte order; a "`-M`" option to disable the use of memory-mapped files, and a "`-C`" option to disable the use of strip chopping

- bugs were fixed in tiffcp handling of codec-specific tags

## Documentation changes

- the `TIFFOpen()` page has been updated to reflect the new optional open mode parameters

## Contributed software changes

- `contrib/win95` contains information and code from Philippe Tenenhaus about using the software under Windows 95

- `contrib/winnt` contains information and code from Dave Dyer about using the software under Windows NT