.TH "pngunpack.c" 3 "Fri Jun 3 2022" "Version 1.6.4" "NCEPLIBS-g2c" \" -*- nroff -*-
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.SH NAME
pngunpack.c
.SH SYNOPSIS
.br
.PP
\fC#include <stdio\&.h>\fP
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\fC#include <stdlib\&.h>\fP
.br
\fC#include 'grib2\&.h'\fP
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.SS "Functions"

.in +1c
.ti -1c
.RI "int \fBdec_png\fP (unsigned char *, \fBg2int\fP *, \fBg2int\fP *, char *)"
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.RI "Decode PNG\&. "
.ti -1c
.RI "\fBg2int\fP \fBpngunpack\fP (unsigned char *cpack, \fBg2int\fP len, \fBg2int\fP *idrstmpl, \fBg2int\fP ndpts, \fBg2float\fP *fld)"
.br
.RI "This subroutine unpacks a data field that was packed into a PNG image format using info from the GRIB2 Data Representation Template 5\&.41 or 5\&.40010\&. "
.in -1c
.SH "Detailed Description"
.PP 

.PP
\fBAuthor\fP
.RS 4
Stephen Gilbert 
.RE
.PP
\fBDate\fP
.RS 4
2003-08-27 
.RE
.PP

.PP
Definition in file \fBpngunpack\&.c\fP\&.
.SH "Function Documentation"
.PP 
.SS "int dec_png (unsigned char * pngbuf, \fBg2int\fP * width, \fBg2int\fP * height, char * cout)"

.PP
Decode PNG\&. 
.PP
\fBParameters\fP
.RS 4
\fIpngbuf\fP Pointer to PNG buffer\&. 
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\fIwidth\fP Pointer to width\&. 
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\fIheight\fP Pointer to height\&. 
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\fIcout\fP Output buffer\&.
.RE
.PP
\fBReturns\fP
.RS 4
0 for success, error code otherwise\&.
.RE
.PP
\fBAuthor\fP
.RS 4
Stephen Gilbert 
.RE
.PP

.PP
Definition at line 67 of file dec_png\&.c\&.
.PP
References user_read_data()\&.
.PP
Referenced by pngunpack()\&.
.SS "\fBg2int\fP pngunpack (unsigned char * cpack, \fBg2int\fP len, \fBg2int\fP * idrstmpl, \fBg2int\fP ndpts, \fBg2float\fP * fld)"

.PP
This subroutine unpacks a data field that was packed into a PNG image format using info from the GRIB2 Data Representation Template 5\&.41 or 5\&.40010\&. 
.PP
\fBParameters\fP
.RS 4
\fIcpack\fP The packed data field (character*1 array)\&. 
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\fIlen\fP length of packed field cpack()\&. 
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\fIidrstmpl\fP Pointer to array of values for Data Representation Template 5\&.41 or 5\&.40010\&. 
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\fIndpts\fP The number of data values to unpack\&. 
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\fIfld\fP Contains the unpacked data values\&.
.RE
.PP
\fBReturns\fP
.RS 4
0 for success, 1 for memory allocation error\&.
.RE
.PP
\fBAuthor\fP
.RS 4
Stephen Gilbert 
.RE
.PP
\fBDate\fP
.RS 4
2003-08-27 
.RE
.PP

.PP
Definition at line 27 of file pngunpack\&.c\&.
.PP
References dec_png(), gbits(), int_power(), and rdieee()\&.
.PP
Referenced by g2_unpack7()\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for NCEPLIBS-g2c from the source code\&.