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JPEG_LIB_MK1 ?

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	JPEG_LIB_MK1 ? by Dwight Kelly :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Hello, what is the meaning of the define JPEG_LIB_MK1? _______________________________________________ Tiff mailing list: Tiff@... http://lists.maptools.org/mailman/listinfo/tiff http://www.remotesensing.org/libtiff/
	Re: JPEG_LIB_MK1 ? by Bob Friesenhahn :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message On Thu, 10 Sep 2009, Dwight Kelly wrote: > Hello, what is the meaning of the define JPEG_LIB_MK1? There is a development version of libjpeg (based on 6b) in the same CVS repository as libjpeg which supports 8 and 12 bit bits/sample in the same build. Unfortunately, this libjpeg was never quite completed and since there is now a JPEG 7 release and a JPEG 8 under development, I am afraid that the project has become orphaned. Bob -- Bob Friesenhahn bfriesen@..., http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ Tiff mailing list: Tiff@... http://lists.maptools.org/mailman/listinfo/tiff http://www.remotesensing.org/libtiff/
	Re: JPEG_LIB_MK1 ? by Even Rouault :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Selon Bob Friesenhahn <bfriesen@...>: Recently, Frank Warmerdam made a few changes in libjpeg CVS to built it for 12 bits/sample mode, in a way it can coexist with the standard 8 bits/sample. This work has been integrated in GDAL SVN head and used by its internal libtiff for example. Look at http://trac.osgeo.org/gdal/wiki/TIFF12BitJPEG for more details. > On Thu, 10 Sep 2009, Dwight Kelly wrote: > > > Hello, what is the meaning of the define JPEG_LIB_MK1? > > There is a development version of libjpeg (based on 6b) in the same > CVS repository as libjpeg which supports 8 and 12 bit bits/sample in > the same build. Unfortunately, this libjpeg was never quite completed > and since there is now a JPEG 7 release and a JPEG 8 under > development, I am afraid that the project has become orphaned. > > Bob > -- > Bob Friesenhahn > bfriesen@..., http://www.simplesystems.org/users/bfriesen/ > GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ > _______________________________________________ > Tiff mailing list: Tiff@... > http://lists.maptools.org/mailman/listinfo/tiff > http://www.remotesensing.org/libtiff/ > _______________________________________________ Tiff mailing list: Tiff@... http://lists.maptools.org/mailman/listinfo/tiff http://www.remotesensing.org/libtiff/
	Re: JPEG_LIB_MK1 ? by Bob Friesenhahn :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message On Thu, 10 Sep 2009, Even Rouault wrote: > Selon Bob Friesenhahn <bfriesen@...>: > > Recently, Frank Warmerdam made a few changes in libjpeg CVS to built it for 12 > bits/sample mode, in a way it can coexist with the standard 8 bits/sample. This > work has been integrated in GDAL SVN head and used by its internal libtiff for > example. Look at http://trac.osgeo.org/gdal/wiki/TIFF12BitJPEG for more details. Right. But this builds the whole libjpeg twice and renames the symbols for one of the copies. Bob -- Bob Friesenhahn bfriesen@..., http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ Tiff mailing list: Tiff@... http://lists.maptools.org/mailman/listinfo/tiff http://www.remotesensing.org/libtiff/