68 lines
2.8 KiB
Text
68 lines
2.8 KiB
Text
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JUNE 01, 2009
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W/NP11:SAG
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g2clib Library.
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This library contains "C" decoder/encoder
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routines for GRIB edition 2. The user API for the GRIB2 routines
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is described in file "grib2c.doc".
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This "C" source code conatins many uses of the C++
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comment style "//". Please make sure you include the
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appropriate compiler option in the CFLAGS variable in the
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makefile to allow the use of "//" comment indicators.
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We have added support for PNG and JPEG2000 image compression
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algorithms within the GRIB2 standard. If you would like
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to compile this library to utilize these GRIB2 Templates,
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make sure that -DUSE_PNG and -DUSE_JPEG2000 are specified
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in the DEFS variable in the makefile. You will also need
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to download and install the external libraries listed below,
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if they are not already installed on your system.
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If you do not wish to bother with the external libs and
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don't need PNG and JPEG2000 support, you can remove the
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-DUSE_PNG and -DUSE_JPEG2000 flags from the DEFS variable
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in the makefile.
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-------------------------------------------------------------------------------
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External Libraries:
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libjasper.a - This library is a C implementation of the JPEG-2000 Part-1
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standard (i.e., ISO/IEC 15444-1). This library is required
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if JPEG2000 support in GRIB2 is desired. If not, remove
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the -DUSE_JPEG2000 option from the DEFS variable
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in the makefile.
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Download version jasper-1.900.1 from the JasPer Project's
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home page, http://www.ece.uvic.ca/~mdadams/jasper/.
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More information about JPEG2000 can be found at
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http://www.jpeg.org/JPEG2000.html.
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libpng.a This library is a C implementation of the Portable Network
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Graphics PNG image compression format. This library is required
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if PNG support in GRIB2 is desired. If not, remove
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the -DUSE_PNG option from the DEFS variable
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in the makefile.
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If not already installed on your system, download version
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libpng-1.2.35 from http://www.libpng.org/pub/png/libpng.html.
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More information about PNG can be found at
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http://www.libpng.org/pub/png/.
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libz.a This library contains compression/decompression routines
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used by libpng.a for PNG image compression support.
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This library is required if PNG support in GRIB2 is desired.
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If not, remove the -DUSE_PNG option from the DEFS variable
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in g2lib/makefile.
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If not already installed on your system, download version
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zlib-1.2.3 from http://www.gzip.org/zlib/.
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