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DCMTK COMPILE TIME FLAGS AND MACROS
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The behaviour of several DCMTK tools and libraries can be modified by a
number of compile time flags (macros), which are explained below.
Most of these macros enable experimental or rarely needed features
in DCMTK, others disable certain functions. Use with care.
ALLOW_ILLUMINATION_OVERRIDE
Affected: dcmpstat/apps/dcmprscu.cc
Type of modification: Activates experimental or rarely used feature
Explanation: Allows the settings for Illumination and Reflected
Ambient Light, which are stored in a Stored Print object, to be
overridden from the print job command file
BUGGY_IMPLEMENTATION_CLASS_UID_PREFIX
Affected: dcmnet/apps/storescp.cc
Type of modification: Activates workaround for known bug in other product
Explanation: The dcmnet module contains a workaround that allows to
communicate with some buggy Store SCUs. If the global flag
dcmPeerRequiresExactUIDCopy is enabled, an illegal space-padding in
the Affected SOP Instance UID field of the C-STORE-RQ message is
retained in the corresponding C-STORE-RSP message. When this
preprocessor macro is defined, it should contain the prefix of an
implementation class UID of an implementation known to exhibit the
buggy behaviour. The workaround is then activated in storescp
whenever a Store SCU with the given implementation class UID root
connects.
DCMTK_GUI
Affected: all modules
Type of modification: Activates experimental or rarely used feature
Explanation: When this macro is defined, DCMTK re-assigns the standard
output and error streams maintained by ofConsole to string streams.
This will allow a GUI based application to extract the messages and
either present them to the user or store them in a log file. See
comments in ofstd/include/ofconsol.h
DETERMINE_OUTPUT_COLOR_SPACE_FROM_IJG_GUESS
Affected: dcmjpeg
Type of modification: Activates alternative implementation
Explanation: By default, the JPEG decompressor takes determines the
color model of the compressed stream from the DICOM Photometric
Interpretation. If this flag is activated, the decoder uses the
"guess" provided by the Independent JPEG Group Library instead.
DICOMDIR_WITHOUT_BACKUP
Affected: dcmdata
Type of modification: Disables feature
Explanation: By default DCMTK creates a backup of an existing DICOMDIR
(using the name DICOMDIR.$$$) when a DcmDicomDir object is written
to file. The creation of the backup can be disabled with this macro.
DISABLE_OFSTD_ATOF
Affected: all modules
Type of modification: Disables feature
Explanation: by default, DCMTK uses it's own implementation of atof to
convert strings to double numbers in a locale-independent manner.
This flag forces DCMTK to use the standard sscanf() function
instead, which is normally much faster and gives a higher precision
than DCMTK's built in code, but is locale dependent, i.e. cannot be
used with locales such as German since DICOM decimal strings always
use the Posix locale.
DISABLE_OFSTD_FTOA
Affected: all modules
Type of modification: Disables feature
Explanation: by default, DCMTK uses it's own implementation to
convert double numbers to strings to in a locale-independent manner.
This flag forces DCMTK to use the standard sprintf() function
instead, which is locale dependent, i.e. cannot be used with locales
such as German since DICOM decimal strings always use the Posix
locale.
DONT_DISABLE_NAGLE_ALGORITHM
Affected: dcmnet
Type of modification: Disables feature
Explanation: By default, DCMTK disables the so-called Nagle algorithm
for each DICOM transport connection. This provides a 2-4 times
performance improvement (WinNT4/SP4, 100Mbit/s Ethernet). Effects on
other environments are unknown. When compiled with this macro, the
code affecting the Nagle algorithm is disabled. See documentation
for environment variable TCP_NODELAY in config/docs/envvars.txt
NO_GET_SUPPORT
Affected: imagectn
Type of modification: Disables feature
Explanation: Disables the experimental C-GET support in imagectn
NO_IOS_BASE_ASSIGN
Affected: all command line tools
Type of modification: Disables feature
Explanation: On Win32 platforms, the prepareCmdLineArgs() function
maps cout to cerr by assignment. This does not work with all
iostream implementations and can, therefore, be disabled with this
macro.
NO_PATIENTSTUDYONLY_SUPPORT
Affected: imagectn
Type of modification: Disables feature
Explanation: Disables support for the Patient/Study Only
Query/Retrieve Model in imagectn
NO_WINDOWS95_ADDRESS_TRANSLATION_WORKAROUND
Affected: dcmnet
Type of modification: Disables feature
Explanation: Under Win95 gethostbyname will not accept an IP address
e. g. "134.106.1.1". This appears to work without problems under
Windows NT and several Unix variants. As a workaround, DCMTK
explicitly handles the IP address case. The workaround can be
disabled with this macro
OFCONDITION_IMPLICIT_BOOL_CONVERSION
Affected: class OFCondition (ofstd/include/ofcond.h)
Type of modification: Activates experimental or rarely used feature
Explanation: Activates an implicit conversion from OFCondition to
OFBool, i.e. operator OFBool(). Implicit conversion might not always
be a good idea since it can hide unwanted constructs. Therefore,
this operator is disabled by default.
OFCONDITION_STRICT_MODE
Affected: class OFCondition (ofstd/include/ofcond.h) and related
Type of modification: Disables feature
Explanation: Disables the compatibility options related to the
transition to OFCondition: No OFCondition default constructor, no
typedefs for E_Condition, CONDITION, no macros for SUCCESS and
condition aliases.
OLD_USER_INFO_SUB_ITEM_ORDER
Affected: dcmnet
Type of modification: Activates experimental or rarely used feature
Explanation: prior DCMTK releases did not encode A-ASSOCIATE user
information sub-items in ascending order, i.e. they sent 55H
followed by 54H and 56H. This behaviour has been "legalized" by
DICOM CP 280 but is known to create problems with some other
toolkits. The current DCMTK release always sends the user
information sub-items in ascending order, but can be "forced" with
this macro to revert to the old behaviour. It should be re-activated
for testing purposes only.
PASTEL_COLOR_OUTPUT
Affected: dcmimgle, dcmimage
Type of modification: Activates experimental or rarely used feature
Explanation: activates experimental code in dcmimgle/dcmimage that
renders monochrome images with pastel colors
PDV_TEST
Affected: dcmnet
Type of modification: Activates experimental or rarely used feature
Explanation: Causes the network module to insert a false, zero-length
PDV (2 byte hdr) into each P-DATA-PDU
PIXELSTACK_MEMORY_LEAK_WORKAROUND
Affected: dcmdata
Type of modification: Activates experimental or rarely used feature
Explanation: on certain platforms there seems to be a memory leak in
DcmDataset::chooseRepresentation(). The work-around activated by
this macro should solve this issue.
PRINT_REPLACED_DICTIONARY_ENTRIES
Affected: dcmdata
Type of modification: Activates experimental or rarely used feature
Explanation: When reading the data dictionary, duplicate entries (i.e.
entries replacing an older entry in the dictionary) are reported on
console if compiled with this macro. Useful for testing a new
dictionary version.
RETAIN_ASSOCIATION
Affected: ti
Type of modification: Activates experimental or rarely used feature
Explanation: keeps association to remote Query SCP open after
study/series/image listing. Default behaviour is to open new
association for each query.
REVERSE_OVERLAY_ORIGIN_ORDER
Affected: dcmimgle
Type of modification: Activates experimental or rarely used feature
Explanation: When compiled with this macro, dcmimgle assumes that the
values in DCM_ImageFrameOrigin are in reverse order, i.e. X\Y
instead of Y\X.
SITE_UID_ROOT
Affected: dcmdata
Type of modification: Site customization
Explanation: dcmdata contains a routine that generates DICOM unique
identifiers (UIDs). By default, these are constructed from the OFFIS
UID namespace, i.e. using the OFFIS UID Root "1.2.276.0.7230010.3".
Users who prefer to let the toolkit generate UIDs from their own UID
namespace should compile DCMTK with SITE_UID_ROOT defined to their own
UID root.
STARVIEW
Affected: dcmimgle, dcmimage
Type of modification: Activates experimental or rarely used feature
Explanation: Enables support for old StarView 2 GUI class library from
Star Division.
STRICT_COMPARE
Affected: imagectn
Type of modification: Activates experimental or rarely used feature
Explanation: By default, imagectn ignores illegal leading and trailing
space characters when comparing UIDs. This behaviour can be modified
by defining this macro.
SUPRESS_CREATE_STAMP
Affected: dcmdata/libsrc/mkdeftag.cc, dcmdata/libsrc/mkdictbi.cc
Type of modification: Activates experimental or rarely used feature
Explanation: When defined, suppresses the creation of a time stamp
comment when re-generating dcdeftag.h and dcdictzz.cc
USE__LOCKING
Affected: dcmnet and related (imagectn, dcmpstat)
Type of modification: Activates alternative implementation
Explanation: Activates an alternative emulation of flock() on Win32
platforms using _locking(). This version should only be used on
compilers where _get_osfhandle() is not available since it does not
implement shared locks.