[wxWidgets.git] / src / tiff / html / v3.6.0.html

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Changes in TIFF v3.6.0
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<BASEFONT SIZE=4>
<B><FONT SIZE=+3>T</FONT>IFF <FONT SIZE=+2>C</FONT>HANGE <FONT SIZE=+2>I</FONT>NFORMATION</B>
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<UL>
<HR SIZE=4 WIDTH=65% ALIGN=left>
<B>Current Version</B>: v3.6.0<BR>
<B>Previous Version</B>: <A HREF=v3.5.7.html>v3.5.7</a><BR>
<B>Master FTP Site</B>: <A HREF="ftp://ftp.remotesensing.org/pub/libtiff">
ftp.remotesensing.org</a>, directory pub/libtiff</A><BR>
<B>Master HTTP Site</B>: <A HREF="http://www.remotesensing.org/libtiff">
http://www.remotesensing.org/libtiff</a> 
<HR SIZE=4 WIDTH=65% ALIGN=left>
</UL>

<P>
This document describes the changes made to the software between the
<I>previous</I> and <I>current</I> 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:
<UL>
<LI><A HREF="#hightlights">Major Changes</A>
<LI><A HREF="#configure">Changes in the software configuration</A>
<LI><A HREF="#libtiff">Changes in libtiff</A>
<LI><A HREF="#tools">Changes in the tools</A>
<LI><A HREF="#contrib">Changes in the contrib area</A>
<LI><A HREF="#lzwkit">Changes in the LZW compression kit</A>
</UL>
<p> 
<P><HR WIDTH=65% ALIGN=left>

<!--------------------------------------------------------------------------->

<A NAME="highlights"><B><FONT SIZE=+3>M</FONT>AJOR CHANGES:</B></A>

<ul>
	<li> New utility <a href=./man/raw2tiff.1.html>raw2tiff</a>
for converting raw rasters into TIFF files.
	<li> Lots of new <a href=./man/tiff2ps.1.html>tiff2ps</a> options.
	<li> Lots of new <a href=./man/fax2tiff.1.html>fax2tiff</a> options.
	<li> Lots of bug fixes for LZW, JPEG and OJPEG compression. 
</ul>

<h3>Custom Tag Support</h3>

The approach to extending libtiff with custom tags has changed radically.
Previously, all internally supported TIFF tags had a place in the 
private TIFFDirectory structure within libtiff to hold the values (if read),
and a "field number" (ie. FIELD_SUBFILETYPE) used to identify that tag. 
However, every time a new tag was added to the core, the size of the
TIFFDirectory structure would changing, breaking any dynamically linked
software that used the private data structures.<p>

Also, any tag not recognised
by libtiff would not be read and accessable to applications without some
fairly complicated work on the applications part to pre-register the tags
as exemplified by the support for "Geo"TIFF tags by libgeotiff layered on
libtiff.  <p>

Amoung other things this approach required the extension code
to access the private libtiff structures ... which made the higher level
non-libtiff code be locked into a specific version of libtiff at compile time.
This caused no end of bug reports!<p>

The new approach is for libtiff to read all tags from TIFF files.  Those that
aren't recognised as "core tags" (those having an associated FIELD_ value, 
and place for storage in the TIFFDirectory structure) are now read into a 
dynamic list of extra tags (td_customValues in TIFFDirectory).  When a new
tag code is encountered for the first time in a given TIFF file, a new 
anonymous tag definition is created for the tag in the tag definition list. 
The type, and some other metadata is worked out from the instance encountered.
These fields are known as "custom tags".  <p>

Custom tags can be set and fetched normally using TIFFSetField() and 
TIFFGetField(), and appear pretty much like normal tags to application code.
However, they have no impact on internal libtiff processing (such as
compression).  Some utilities, such as tiffcp will now copy these custom
tags to the new output files. <p>

As well as the internal work with custom tags, new C API entry points
were added so that extension libraries, such as libgeotiff, could 
define new tags more easily without accessing internal data structures.  
Because tag handling of extension tags is done via the "custom fields" 
mechanism as well, the definition provided externally mostly serves to provide
a meaningful name for the tag.

The addition of "custom tags" and the altered approach to extending libtiff
with externally defined tags is the primary reason for the shift to the 
3.6.x version number from 3.5.x.<p>

<P><HR WIDTH=65% ALIGN=left>
<!--------------------------------------------------------------------------->

<A NAME="configure"><B><FONT SIZE=+3>C</FONT>HANGES IN THE SOFTWARE CONFIGURATION:</B></A>

<UL>
<li> configure, config.site: Fix for large files (>2GiB) support. New
option in the config.site: LARGEFILE="yes". Should be enougth for the large
files I/O.

<li> configure: Set -DPIXARLOG_SUPPORT option along with -DZIP_SUPPORT.

<li> html/Makefile.in: Updated to use groffhtml for generating html pages
from man pages.

<li> configure, libtiff/Makefile.in: Added SCO OpenServer 5.0.6 support
from John H. DuBois III.  

<li> libtiff/{Makefile.vc, libtiff.def}: Missed declarations added.

<li> libtiff/Makefile.in, tools/Makefile.in: Shared library will not be
stripped when installing, utility binaries will do be stripped. As per bug 93.

<li> man/Makefile.in: Patch DESTDIR handling as per bug 95.

<li> configure: OpenBSD changes for Sparc64 and DSO version as per bug 96.

<li> config.site/configure: added support for OJPEG=yes option to enable
OJPEG support from config.site.

<li> config.guess, config.sub: Updated from ftp.gnu.org/pub/config.

<li> configure: Modify CheckForBigEndian so it can work in a cross
compiled situation.

<li> configure, libtiff/Makefile.in: Changes for building on MacOS 10.1
as per bug 94.

<li> html/Makefile.in: added missing images per bug 92.

<li> port/Makefile.in: fixed clean target per bug 92.
</UL>

<P><HR WIDTH=65% ALIGN=left>

<!--------------------------------------------------------------------------->

<A NAME="libtiff"><B><FONT SIZE=+3>C</FONT>HANGES IN LIBTIFF:</B></A>

<UL>

<li> libtiff/tif_getimage.c: New function <A
HREF="./man/TIFFReadRGBAImage.3t.html">TIFFReadRGBAImageOriented()</A>
implemented to retrieve raster array with user-specified origin position.

<li> libtiff/tif_fax3.c: Fix wrong line numbering.

<li> libtiff/tif_dirread.c: Check field counter against number of fields.

<li> Store a list of opened IFD to prevent directory looping.

<li> libtiff/tif_jpeg.c: modified segment_height calculation to always
be a full height tile for tiled images.  Also changed error to just
be a warning.

<li> libtiff/tif_lzw.c: fixed so that decoder state isn't allocated till
LZWSetupDecode().  Needed to read LZW files in "r+" mode.
	
<li> libtiff/tif_dir.c: fixed up the tif_postdecode settings responsible
for byte swapping complex image data.
	
<li> libtiff/tif_open.c: Removed error if opening a compressed file
in update mode bug (198).

<li> libtiff/tif_write.c: TIFFWriteCheck() now fails if the image is
a pre-existing compressed image.  That is, image writing to pre-existing
compressed images is not allowed.

<li> html/man/*.html: Web pages regenerated from man pages.

<li> libtiff/tif_jpeg.c: Hack to ensure that "boolean" is defined properly
on Windows so as to avoid the structure size mismatch error from libjpeg
(bug 188).

<li> libtiff/tiff.h: #ifdef USING_VISUALAGE around previous Visual Age
AIX porting hack as it screwed up gcc. (bug 39)

<li> libtiff/tiff.h: added COMPRESSION_JP2000 (34712) for LEAD tools
custom compression.

<li> libtiff/tif_dirread.c: Another fix for the fetching SBYTE arrays
by the TIFFFetchByteArray() function. (bug 52)

<li> libtiff/tif_dirread.c: Expand v[2] to v[4] in TIFFFetchShortPair()
as per bug 196.

<li> libtiff/tif_lzw.c: Additional consistency checking added in
LZWDecode() and LZWDecodeCompat() fixing bugs 190 and 100.

<li> libtiff/tif_lzw.c: Added check for valid code lengths in LZWDecode()
and LZWDecodeCompat(). Fixes bug 115.

<li> tif_getimage.c: Ensure that TIFFRGBAImageBegin() returns the
return code from the underlying pick function as per bug 177.

<li> libtiff/{tif_jpeg.c,tif_strip.c,tif_print.c}: Hacked tif_jpeg.c to
fetch TIFFTAG_YCBCRSUBSAMPLING from the jpeg data stream if it isn't
present in the tiff tags as per bug 168.

<li> libtiff/tif_jpeg.c: Fixed problem with setting of nrows in 
JPEGDecode() as per bug 129. 

<li> libtiff/tif_read.c, libtiff/tif_write.c: TIFFReadScanline() and
TIFFWriteScanline() now set tif_row explicitly in case the codec has
fooled with the value as per bug 129.

<li> libtiff/tif_ojpeg.c: Major upgrade from Scott.  Details in bug 156.

<li>  libtiff/tif_open.c: Pointers to custom procedures
in TIFFClientOpen() are checked to be not NULL-pointers.

<li> libtiff/tif_lzw.c: Assertions in LZWDecode and LZWDecodeCompat
replaced by warnings. Now libtiff should read corrupted LZW-compressed
files by skipping bad strips as per bug 100.
	
<li> libtiff/: tif_dirwrite.c, tif_write.c, tiffio.h:
<a href=./man/TIFFWriteDirectory.3t.html>TIFFCheckpointDirectory()</a>
routine added as per bug 124.  The
<a href=./man/TIFFWriteDirectory.3t.html>TIFFWriteDirectory</a>
man page discusses this new function as well as the related 
<a href=./man/TIFFWriteDirectory.3t.html>TIFFRewriteDirectory()</a>.

<li> libtiff/: tif_codec.c, tif_compress.c, tiffiop.h, tif_getimage.c: 
Introduced
additional members tif->tif_decodestatus and tif->tif_encodestatus
for correct handling of unconfigured codecs (we should not try to read
data or to define data size without correct codecs). See bug 119.

<li> tif_dirread.c: avoid div-by-zero if rowbytes is zero in chop func as
per bug 111.

<li> libtiff/: tiff.h, tif_dir.c, tif_dir.h, tif_dirinfo.c, tif_dirread.c,
tif_dirwrite.c: Dwight Kelly added get/put code for new tag XMLPACKET as 
defined in Adobe XMP Technote. Added missing INKSET tag value from TIFF 6.0 
spec INKSET_MULTIINK (=2). Added missing tags from Adobe TIFF technotes: 
CLIPPATH, XCLIPPATHUNITS, YCLIPPATHUNITS, OPIIMAGEID, OPIPROXY and
INDEXED. Added PHOTOMETRIC tag value from TIFF technote 4 ICCLAB (=9).

<li> libtiff/tif_getimage.c: Additional check for supported codecs added in 
TIFFRGBAImageOK, TIFFReadRGBAImage, TIFFReadRGBAStrip and TIFFReadRGBATile now
use TIFFRGBAImageOK before reading a per bug 110.

<li> libtiff/: tif_dir.c, tif_dir.h, tif_dirinfo.c, tif_dirread.c,
tif_dirwrite.c: Added routine
<a href=./man/TIFFDataWidth.3t.html>TIFFDataWidth</a> for determining
TIFFDataType sizes instead of working with tiffDataWidth array
directly as per bug 109.

<li>libtiff/: tif_dirinfo.c, tif_dirwrite.c: Added possibility to
read broken TIFFs with LONG type used for TIFFTAG_COMPRESSION,
TIFFTAG_BITSPERSAMPLE, TIFFTAG_PHOTOMETRIC as per bug 99.

<li> libtiff/{tiff.h,tif_fax3.c}: Add support for __arch64__ as per bug 94.

<li> libtiff/tif_read.c: Fixed TIFFReadEncodedStrip() to fail if the
decodestrip function returns anything not greater than zero as per bug 97.

<li> libtiff/tif_jpeg.c: fixed computation of segment_width for 
tiles files to avoid error about it not matching the 
cinfo.d.image_width values ("JPEGPreDecode: Improper JPEG strip/tile 
size.") for ITIFF files.  Apparently the problem was incorporated since
3.5.5, presumably during the OJPEG/JPEG work recently.

<li> libtiff/tif_getimage.c: If DEFAULT_EXTRASAMPLE_AS_ALPHA is 1 
(defined in tiffconf.h - 1 by default) then the RGBA interface
will assume that a fourth extra sample is ASSOCALPHA if the
EXTRASAMPLE value isn't set for it.  This changes the behaviour of
the library, but makes it work better with RGBA files produced by
lots of applications that don't mark the alpha values properly.
As per bugs 93 and 65.

<li> libtiff/tif_jpeg.c: allow jpeg data stream sampling values to 
override those from tiff directory.  This makes this work with 
ImageGear generated files. 

</UL>

<P><HR WIDTH=65% ALIGN=left>

<!-------------------------------------------------------------------------->
	
<A NAME="tools"><B><FONT SIZE=+3>C</FONT>HANGES IN THE TOOLS:</B></A>

<UL>
	
<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Added page size setting
when creating PS Level 2.

<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Fixed PS comment emitted when
FlateDecode is being used.

<li> <a href=./man/tiffsplit.1.html>tiffsplit</a>: increased the maximum
number of pages that can be split.

<li> <a href=./man/raw2tiff.1.html>raw2tiff</a>: Added option `-p' to
explicitly select color	space of input image data.

<li> <a href=./man/tiffmedian.1.html>tiffmedian</a>: Suppiort for large
(> 2GB) images.

<li> <a href=./man/ppm2tiff.1.html>ppm2tiff</a>: Fixed possible endless loop.

<li> <a href=./man/tiff2rgba.1.html>tiff2rgba</a>: Switched to use
<A HREF="./man/TIFFReadRGBAImage.3t.html">TIFFReadRGBAImageOriented()</A>
instead of <A HREF="./man/TIFFReadRGBAImage.3t.html">TIFFReadRGBAImage()</A>.

<li> <a href=./man/tiffcmp.1.html>tiffcmp</a>: Fixed problem with unused data
comparing (bug 349). `-z' option now can be used to set the number of reported
different bytes.

<li> <a href=./man/tiffcp.1.html>tiffcp</a>: Added possibility to specify
value -1 to -r option to get the entire image as one strip (bug 343).

<li> <a href=./man/tiffcp.1.html>tiffcp</a>: Set the correct RowsPerStrip
and PageNumber values (bug 343).
	
<li> <a href=./man/fax2tiff.1.html>fax2tiff</a>: Page numbering fixed (bug
341).

<li> <a href=./man/ppm2tiff.1.html>ppm2tiff</a>: PPM header parser improved:
now able to skip comments.

<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Force deadzone printing when
EPS output specified (bug 325).

<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Add ability to generate
PS Level 3. It basically allows one to use the /flateDecode filter for ZIP
compressed TIFF images. Patch supplied by Tom Kacvinsky (bug 328).
	
<li> <a href=./man/tiffcp.1.html>tiffcp</a>: Fixed problem with colorspace
conversion for JPEG encoded images (bugs 23 and 275)

<li> <a href=./man/fax2tiff.1.html>fax2tiff</a>: Applied patch from
Julien Gaulmin. More switches for fax2tiff tool for better control
of input and output (bugs 272 and 293).

<li> <a href=./man/raw2tiff.1.html>raw2tiff</a>:
New utility for turning raw raster images into TIFF files
written by Andrey Kiselev.

<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>:
Sebastian Eken provided patches (bug 200) to add new these new 
switches:
  <ul>
    <li> <b>-b #</b>: for a bottom margin of # inches
    <li> <b>-c</b>: center image
    <li> <b>-l #</b>: for a left margin of # inches
    <li> <b>-r</b>: rotate the image by 180 degrees
  </ul>

Also, new features merged with code for shrinking/overlapping.

<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Don't emit BeginData/EndData
DSC comments since we are unable to properly include the amount to skip
as per bug 80.

<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Added workaround for some
software that may crash when last strip of image contains fewer number
of scanlines than specified by the `/Height' variable as per bug 164.

<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Patch from John Williams to add new 
functionality for tiff2ps utility splitting long images in several pages as
per bug 142. New switches:
	<ul>
		<li> <b>-H #</b>: split image if height is more than # inches
		<li> <b>-L #</b>: overLap split images by # inches
	</ul>

<li>  <a href=./man/tiff2ps.1.html>tiff2ps</a>: New commandline
switches to override resolution units obtained from the input file per bug 131:
	<ul>
		<li> <b>-x</b>: override resolution units as centimeters
		<li> <b>-y</b>: override resolution units as inches
	</ul>

<li> <a href=./man/fax2tiff.1.html>fax2tiff</a>: Updated to reflect
latest changes in libtiff per bug 125.

<li> tiff2ps: Division by zero fixed as per bug 88.

<li> <a href=./man/tiffcp.1.html>tiffcp<a>:
Added support for 'Orientation' tag.

<li> <a href=./man/tiffdump.1.html>tiffdump</a>:
include TIFFTAG_JPEGTABLES in tag list.

<li> tiffset: fix bug in error reporting.

</UL>

<P><HR WIDTH=65% ALIGN=left>

<!--------------------------------------------------------------------------->

<A NAME="contrib"><B><FONT SIZE=+3>C</FONT>HANGES IN THE CONTRIB AREA:</B></A>
<UL> 

<li> Fixed distribution to include contrib/addtiffo/tif_ovrcache.{c,h}.
<li> libtiff/contrib/win95: renamed to contrib/win_dib.  Added new 
Tiffile.cpp example of converting TIFF files into a DIB on Win32 as per 
bug 143.

</UL>

<!--------------------------------------------------------------------------->

<A NAME="lzwkit"><B><FONT SIZE=+3>C</FONT>HANGES IN THE LZW COMPRESSION
KIT:</B></A>
<UL> 

<li> LZW compression kit synchronized with actual libtiff version.

</UL>

<A HREF="index.html"><IMG SRC="images/back.gif"></A> TIFF home page.<BR>

<HR>

Last updated $Date: 2003/10/04 11:38:17 $.

</BODY>
</HTML>
Commit	Line	Data
8414a40c VZ	1	<HTML>
	2	<HEAD>
	3	<TITLE>
	4	Changes in TIFF v3.6.0
	5	</TITLE>
	6	</HEAD>
	7
	8	<BODY BGCOLOR=white>
	9	<FONT FACE="Helvetica, Arial, Sans">
	10	<FONT FACE="Helvetica, Arial, Sans">
	11
	12	<BASEFONT SIZE=4>
	13	<B><FONT SIZE=+3>T</FONT>IFF <FONT SIZE=+2>C</FONT>HANGE <FONT SIZE=+2>I</FONT>NFORMATION</B>
	14	<BASEFONT SIZE=3>
	15
	16	<UL>
	17	<HR SIZE=4 WIDTH=65% ALIGN=left>
	18	<B>Current Version</B>: v3.6.0<BR>
	19	<B>Previous Version</B>: <A HREF=v3.5.7.html>v3.5.7</a><BR>
	20	<B>Master FTP Site</B>: <A HREF="ftp://ftp.remotesensing.org/pub/libtiff">
	21	ftp.remotesensing.org</a>, directory pub/libtiff</A><BR>
	22	<B>Master HTTP Site</B>: <A HREF="http://www.remotesensing.org/libtiff">
	23	http://www.remotesensing.org/libtiff</a>
	24	<HR SIZE=4 WIDTH=65% ALIGN=left>
	25	</UL>
	26
	27	<P>
	28	This document describes the changes made to the software between the
	29	<I>previous</I> and <I>current</I> versions (see above).
	30	If you don't find something listed here, then it was not done in this
	31	timeframe, or it was not considered important enough to be mentioned.
	32	The following information is located here:
	33	<UL>
	34	<LI><A HREF="#hightlights">Major Changes</A>
	35	<LI><A HREF="#configure">Changes in the software configuration</A>
	36	<LI><A HREF="#libtiff">Changes in libtiff</A>
	37	<LI><A HREF="#tools">Changes in the tools</A>
	38	<LI><A HREF="#contrib">Changes in the contrib area</A>
	39	<LI><A HREF="#lzwkit">Changes in the LZW compression kit</A>
	40	</UL>
	41	<p>
	42	<P><HR WIDTH=65% ALIGN=left>
	43
	44	<!--------------------------------------------------------------------------->
	45
	46	<A NAME="highlights"><B><FONT SIZE=+3>M</FONT>AJOR CHANGES:</B></A>
	47
	48	<ul>
	49	<li> New utility <a href=./man/raw2tiff.1.html>raw2tiff</a>
	50	for converting raw rasters into TIFF files.
	51	<li> Lots of new <a href=./man/tiff2ps.1.html>tiff2ps</a> options.
	52	<li> Lots of new <a href=./man/fax2tiff.1.html>fax2tiff</a> options.
	53	<li> Lots of bug fixes for LZW, JPEG and OJPEG compression.
	54	</ul>
	55
	56	<h3>Custom Tag Support</h3>
	57
	58	The approach to extending libtiff with custom tags has changed radically.
	59	Previously, all internally supported TIFF tags had a place in the
	60	private TIFFDirectory structure within libtiff to hold the values (if read),
	61	and a "field number" (ie. FIELD_SUBFILETYPE) used to identify that tag.
	62	However, every time a new tag was added to the core, the size of the
	63	TIFFDirectory structure would changing, breaking any dynamically linked
	64	software that used the private data structures.<p>
65
66	Also, any tag not recognised
67	by libtiff would not be read and accessable to applications without some
68	fairly complicated work on the applications part to pre-register the tags
69	as exemplified by the support for "Geo"TIFF tags by libgeotiff layered on
70	libtiff. <p>
71
72	Amoung other things this approach required the extension code
73	to access the private libtiff structures ... which made the higher level
74	non-libtiff code be locked into a specific version of libtiff at compile time.
75	This caused no end of bug reports!<p>
76
77	The new approach is for libtiff to read all tags from TIFF files. Those that
78	aren't recognised as "core tags" (those having an associated FIELD_ value,
79	and place for storage in the TIFFDirectory structure) are now read into a
80	dynamic list of extra tags (td_customValues in TIFFDirectory). When a new
81	tag code is encountered for the first time in a given TIFF file, a new
82	anonymous tag definition is created for the tag in the tag definition list.
83	The type, and some other metadata is worked out from the instance encountered.
84	These fields are known as "custom tags". <p>
85
86	Custom tags can be set and fetched normally using TIFFSetField() and
87	TIFFGetField(), and appear pretty much like normal tags to application code.
88	However, they have no impact on internal libtiff processing (such as
89	compression). Some utilities, such as tiffcp will now copy these custom
90	tags to the new output files. <p>
91
92	As well as the internal work with custom tags, new C API entry points
93	were added so that extension libraries, such as libgeotiff, could
94	define new tags more easily without accessing internal data structures.
95	Because tag handling of extension tags is done via the "custom fields"
96	mechanism as well, the definition provided externally mostly serves to provide
97	a meaningful name for the tag.
98
99	The addition of "custom tags" and the altered approach to extending libtiff
100	with externally defined tags is the primary reason for the shift to the
101	3.6.x version number from 3.5.x.<p>
102
103	<P><HR WIDTH=65% ALIGN=left>
104	<!--------------------------------------------------------------------------->
105
106	<A NAME="configure"><B><FONT SIZE=+3>C</FONT>HANGES IN THE SOFTWARE CONFIGURATION:</B></A>
107
108	<UL>
109	<li> configure, config.site: Fix for large files (>2GiB) support. New
110	option in the config.site: LARGEFILE="yes". Should be enougth for the large
111	files I/O.
112
113	<li> configure: Set -DPIXARLOG_SUPPORT option along with -DZIP_SUPPORT.
114
115	<li> html/Makefile.in: Updated to use groffhtml for generating html pages
116	from man pages.
117
118	<li> configure, libtiff/Makefile.in: Added SCO OpenServer 5.0.6 support
119	from John H. DuBois III.
120
121	<li> libtiff/{Makefile.vc, libtiff.def}: Missed declarations added.
122
123	<li> libtiff/Makefile.in, tools/Makefile.in: Shared library will not be
124	stripped when installing, utility binaries will do be stripped. As per bug 93.
125
126	<li> man/Makefile.in: Patch DESTDIR handling as per bug 95.
127
128	<li> configure: OpenBSD changes for Sparc64 and DSO version as per bug 96.
129
130	<li> config.site/configure: added support for OJPEG=yes option to enable
131	OJPEG support from config.site.
132
133	<li> config.guess, config.sub: Updated from ftp.gnu.org/pub/config.
134
135	<li> configure: Modify CheckForBigEndian so it can work in a cross
136	compiled situation.
137
138	<li> configure, libtiff/Makefile.in: Changes for building on MacOS 10.1
139	as per bug 94.
140
141	<li> html/Makefile.in: added missing images per bug 92.
142
143	<li> port/Makefile.in: fixed clean target per bug 92.
144	</UL>
145
146	<P><HR WIDTH=65% ALIGN=left>
147
148	<!--------------------------------------------------------------------------->
149
150	<A NAME="libtiff"><B><FONT SIZE=+3>C</FONT>HANGES IN LIBTIFF:</B></A>
151
152	<UL>
153
154	<li> libtiff/tif_getimage.c: New function <A
155	HREF="./man/TIFFReadRGBAImage.3t.html">TIFFReadRGBAImageOriented()</A>
156	implemented to retrieve raster array with user-specified origin position.
157
158	<li> libtiff/tif_fax3.c: Fix wrong line numbering.
159
160	<li> libtiff/tif_dirread.c: Check field counter against number of fields.
161
162	<li> Store a list of opened IFD to prevent directory looping.
163
164	<li> libtiff/tif_jpeg.c: modified segment_height calculation to always
165	be a full height tile for tiled images. Also changed error to just
166	be a warning.
167
168	<li> libtiff/tif_lzw.c: fixed so that decoder state isn't allocated till
169	LZWSetupDecode(). Needed to read LZW files in "r+" mode.
170
171	<li> libtiff/tif_dir.c: fixed up the tif_postdecode settings responsible
172	for byte swapping complex image data.
173
174	<li> libtiff/tif_open.c: Removed error if opening a compressed file
175	in update mode bug (198).
176
177	<li> libtiff/tif_write.c: TIFFWriteCheck() now fails if the image is
178	a pre-existing compressed image. That is, image writing to pre-existing
179	compressed images is not allowed.
180
181	<li> html/man/*.html: Web pages regenerated from man pages.
182
183	<li> libtiff/tif_jpeg.c: Hack to ensure that "boolean" is defined properly
184	on Windows so as to avoid the structure size mismatch error from libjpeg
185	(bug 188).
186
187	<li> libtiff/tiff.h: #ifdef USING_VISUALAGE around previous Visual Age
188	AIX porting hack as it screwed up gcc. (bug 39)
189
190	<li> libtiff/tiff.h: added COMPRESSION_JP2000 (34712) for LEAD tools
191	custom compression.
192
193	<li> libtiff/tif_dirread.c: Another fix for the fetching SBYTE arrays
194	by the TIFFFetchByteArray() function. (bug 52)
195
196	<li> libtiff/tif_dirread.c: Expand v[2] to v[4] in TIFFFetchShortPair()
197	as per bug 196.
198
199	<li> libtiff/tif_lzw.c: Additional consistency checking added in
200	LZWDecode() and LZWDecodeCompat() fixing bugs 190 and 100.
201
202	<li> libtiff/tif_lzw.c: Added check for valid code lengths in LZWDecode()
203	and LZWDecodeCompat(). Fixes bug 115.
204
205	<li> tif_getimage.c: Ensure that TIFFRGBAImageBegin() returns the
206	return code from the underlying pick function as per bug 177.
207
208	<li> libtiff/{tif_jpeg.c,tif_strip.c,tif_print.c}: Hacked tif_jpeg.c to
209	fetch TIFFTAG_YCBCRSUBSAMPLING from the jpeg data stream if it isn't
210	present in the tiff tags as per bug 168.
211
212	<li> libtiff/tif_jpeg.c: Fixed problem with setting of nrows in
213	JPEGDecode() as per bug 129.
214
215	<li> libtiff/tif_read.c, libtiff/tif_write.c: TIFFReadScanline() and
216	TIFFWriteScanline() now set tif_row explicitly in case the codec has
217	fooled with the value as per bug 129.
218
219	<li> libtiff/tif_ojpeg.c: Major upgrade from Scott. Details in bug 156.
220
221	<li> libtiff/tif_open.c: Pointers to custom procedures
222	in TIFFClientOpen() are checked to be not NULL-pointers.
223
224	<li> libtiff/tif_lzw.c: Assertions in LZWDecode and LZWDecodeCompat
225	replaced by warnings. Now libtiff should read corrupted LZW-compressed
226	files by skipping bad strips as per bug 100.
227
228	<li> libtiff/: tif_dirwrite.c, tif_write.c, tiffio.h:
229	<a href=./man/TIFFWriteDirectory.3t.html>TIFFCheckpointDirectory()</a>
230	routine added as per bug 124. The
231	<a href=./man/TIFFWriteDirectory.3t.html>TIFFWriteDirectory</a>
232	man page discusses this new function as well as the related
233	<a href=./man/TIFFWriteDirectory.3t.html>TIFFRewriteDirectory()</a>.
234
235	<li> libtiff/: tif_codec.c, tif_compress.c, tiffiop.h, tif_getimage.c:
236	Introduced
237	additional members tif->tif_decodestatus and tif->tif_encodestatus
238	for correct handling of unconfigured codecs (we should not try to read
239	data or to define data size without correct codecs). See bug 119.
240
241	<li> tif_dirread.c: avoid div-by-zero if rowbytes is zero in chop func as
242	per bug 111.
243
244	<li> libtiff/: tiff.h, tif_dir.c, tif_dir.h, tif_dirinfo.c, tif_dirread.c,
245	tif_dirwrite.c: Dwight Kelly added get/put code for new tag XMLPACKET as
246	defined in Adobe XMP Technote. Added missing INKSET tag value from TIFF 6.0
247	spec INKSET_MULTIINK (=2). Added missing tags from Adobe TIFF technotes:
248	CLIPPATH, XCLIPPATHUNITS, YCLIPPATHUNITS, OPIIMAGEID, OPIPROXY and
249	INDEXED. Added PHOTOMETRIC tag value from TIFF technote 4 ICCLAB (=9).
250
251	<li> libtiff/tif_getimage.c: Additional check for supported codecs added in
252	TIFFRGBAImageOK, TIFFReadRGBAImage, TIFFReadRGBAStrip and TIFFReadRGBATile now
253	use TIFFRGBAImageOK before reading a per bug 110.
254
255	<li> libtiff/: tif_dir.c, tif_dir.h, tif_dirinfo.c, tif_dirread.c,
256	tif_dirwrite.c: Added routine
257	<a href=./man/TIFFDataWidth.3t.html>TIFFDataWidth</a> for determining
258	TIFFDataType sizes instead of working with tiffDataWidth array
259	directly as per bug 109.
260
261	<li>libtiff/: tif_dirinfo.c, tif_dirwrite.c: Added possibility to
262	read broken TIFFs with LONG type used for TIFFTAG_COMPRESSION,
263	TIFFTAG_BITSPERSAMPLE, TIFFTAG_PHOTOMETRIC as per bug 99.
264
265	<li> libtiff/{tiff.h,tif_fax3.c}: Add support for __arch64__ as per bug 94.
266
267	<li> libtiff/tif_read.c: Fixed TIFFReadEncodedStrip() to fail if the
268	decodestrip function returns anything not greater than zero as per bug 97.
269
270	<li> libtiff/tif_jpeg.c: fixed computation of segment_width for
271	tiles files to avoid error about it not matching the
272	cinfo.d.image_width values ("JPEGPreDecode: Improper JPEG strip/tile
273	size.") for ITIFF files. Apparently the problem was incorporated since
274	3.5.5, presumably during the OJPEG/JPEG work recently.
275
276	<li> libtiff/tif_getimage.c: If DEFAULT_EXTRASAMPLE_AS_ALPHA is 1
277	(defined in tiffconf.h - 1 by default) then the RGBA interface
278	will assume that a fourth extra sample is ASSOCALPHA if the
279	EXTRASAMPLE value isn't set for it. This changes the behaviour of
280	the library, but makes it work better with RGBA files produced by
281	lots of applications that don't mark the alpha values properly.
282	As per bugs 93 and 65.
283
284	<li> libtiff/tif_jpeg.c: allow jpeg data stream sampling values to
285	override those from tiff directory. This makes this work with
286	ImageGear generated files.
287
288	</UL>
289
290	<P><HR WIDTH=65% ALIGN=left>
291
292	<!-------------------------------------------------------------------------->
293
294	<A NAME="tools"><B><FONT SIZE=+3>C</FONT>HANGES IN THE TOOLS:</B></A>
295
296	<UL>
297
298	<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Added page size setting
299	when creating PS Level 2.
300
301	<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Fixed PS comment emitted when
302	FlateDecode is being used.
303
304	<li> <a href=./man/tiffsplit.1.html>tiffsplit</a>: increased the maximum
305	number of pages that can be split.
306
307	<li> <a href=./man/raw2tiff.1.html>raw2tiff</a>: Added option `-p' to
308	explicitly select color space of input image data.
309
310	<li> <a href=./man/tiffmedian.1.html>tiffmedian</a>: Suppiort for large
311	(> 2GB) images.
312
313	<li> <a href=./man/ppm2tiff.1.html>ppm2tiff</a>: Fixed possible endless loop.
314
315	<li> <a href=./man/tiff2rgba.1.html>tiff2rgba</a>: Switched to use
316	<A HREF="./man/TIFFReadRGBAImage.3t.html">TIFFReadRGBAImageOriented()</A>
317	instead of <A HREF="./man/TIFFReadRGBAImage.3t.html">TIFFReadRGBAImage()</A>.
318
319	<li> <a href=./man/tiffcmp.1.html>tiffcmp</a>: Fixed problem with unused data
320	comparing (bug 349). `-z' option now can be used to set the number of reported
321	different bytes.
322
323	<li> <a href=./man/tiffcp.1.html>tiffcp</a>: Added possibility to specify
324	value -1 to -r option to get the entire image as one strip (bug 343).
325
326	<li> <a href=./man/tiffcp.1.html>tiffcp</a>: Set the correct RowsPerStrip
327	and PageNumber values (bug 343).
328
329	<li> <a href=./man/fax2tiff.1.html>fax2tiff</a>: Page numbering fixed (bug
330	341).
331
332	<li> <a href=./man/ppm2tiff.1.html>ppm2tiff</a>: PPM header parser improved:
333	now able to skip comments.
334
335	<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Force deadzone printing when
336	EPS output specified (bug 325).
337
338	<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Add ability to generate
339	PS Level 3. It basically allows one to use the /flateDecode filter for ZIP
340	compressed TIFF images. Patch supplied by Tom Kacvinsky (bug 328).
341
342	<li> <a href=./man/tiffcp.1.html>tiffcp</a>: Fixed problem with colorspace
343	conversion for JPEG encoded images (bugs 23 and 275)
344
345	<li> <a href=./man/fax2tiff.1.html>fax2tiff</a>: Applied patch from
346	Julien Gaulmin. More switches for fax2tiff tool for better control
347	of input and output (bugs 272 and 293).
348
349	<li> <a href=./man/raw2tiff.1.html>raw2tiff</a>:
350	New utility for turning raw raster images into TIFF files
351	written by Andrey Kiselev.
352
353	<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>:
354	Sebastian Eken provided patches (bug 200) to add new these new
355	switches:
356	<ul>
357	<li> <b>-b #</b>: for a bottom margin of # inches
358	<li> <b>-c</b>: center image
359	<li> <b>-l #</b>: for a left margin of # inches
360	<li> <b>-r</b>: rotate the image by 180 degrees
361	</ul>
362
363	Also, new features merged with code for shrinking/overlapping.
364
365	<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Don't emit BeginData/EndData
366	DSC comments since we are unable to properly include the amount to skip
367	as per bug 80.
368
369	<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Added workaround for some
370	software that may crash when last strip of image contains fewer number
371	of scanlines than specified by the `/Height' variable as per bug 164.
372
373	<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Patch from John Williams to add new
374	functionality for tiff2ps utility splitting long images in several pages as
375	per bug 142. New switches:
376	<ul>
377	<li> <b>-H #</b>: split image if height is more than # inches
378	<li> <b>-L #</b>: overLap split images by # inches
379	</ul>
380
381	<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: New commandline
382	switches to override resolution units obtained from the input file per bug 131:
383	<ul>
384	<li> <b>-x</b>: override resolution units as centimeters
385	<li> <b>-y</b>: override resolution units as inches
386	</ul>
387
388	<li> <a href=./man/fax2tiff.1.html>fax2tiff</a>: Updated to reflect
389	latest changes in libtiff per bug 125.
390
391	<li> tiff2ps: Division by zero fixed as per bug 88.
392
393	<li> <a href=./man/tiffcp.1.html>tiffcp<a>:
394	Added support for 'Orientation' tag.
395
396	<li> <a href=./man/tiffdump.1.html>tiffdump</a>:
397	include TIFFTAG_JPEGTABLES in tag list.
398
399	<li> tiffset: fix bug in error reporting.
400
401	</UL>
402
403	<P><HR WIDTH=65% ALIGN=left>
404
405	<!--------------------------------------------------------------------------->
406
407	<A NAME="contrib"><B><FONT SIZE=+3>C</FONT>HANGES IN THE CONTRIB AREA:</B></A>
408	<UL>
409
410	<li> Fixed distribution to include contrib/addtiffo/tif_ovrcache.{c,h}.
411	<li> libtiff/contrib/win95: renamed to contrib/win_dib. Added new
412	Tiffile.cpp example of converting TIFF files into a DIB on Win32 as per
413	bug 143.
414
415	</UL>
416
417	<!--------------------------------------------------------------------------->
418
419	<A NAME="lzwkit"><B><FONT SIZE=+3>C</FONT>HANGES IN THE LZW COMPRESSION
420	KIT:</B></A>
421	<UL>
422
423	<li> LZW compression kit synchronized with actual libtiff version.
424
425	</UL>
426
427	<A HREF="index.html"><IMG SRC="images/back.gif"></A> TIFF home page.<BR>
428
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430
431	Last updated $Date: 2003/10/04 11:38:17 $.
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