.TH "dec_png.c" 3 "Tue May 3 2022" "Version 1.6.4" "NCEPLIBS-g2c" \" -*- nroff -*-
.ad l
.nh
.SH NAME
dec_png.c \- PNG functions\&.  

.SH SYNOPSIS
.br
.PP
\fC#include <stdio\&.h>\fP
.br
\fC#include <stdlib\&.h>\fP
.br
\fC#include <string\&.h>\fP
.br
\fC#include <png\&.h>\fP
.br
\fC#include 'grib2\&.h'\fP
.br

.SS "Typedefs"

.in +1c
.ti -1c
.RI "typedef struct png_stream \fBpng_stream\fP"
.br
.RI "Typedef for PNG stream\&. "
.in -1c
.SS "Functions"

.in +1c
.ti -1c
.RI "int \fBdec_png\fP (unsigned char *pngbuf, \fBg2int\fP *width, \fBg2int\fP *height, char *cout)"
.br
.RI "Decode PNG\&. "
.ti -1c
.RI "void \fBuser_read_data\fP (png_structp png_ptr, png_bytep data, png_uint_32 length)"
.br
.RI "Custom read function used so that libpng will read a PNG stream from memory instead of a file on disk\&. "
.in -1c
.SH "Detailed Description"
.PP 
PNG functions\&. 


.PP
\fBAuthor\fP
.RS 4
Stephen Gilbert 
.RE
.PP

.PP
Definition in file \fBdec_png\&.c\fP\&.
.SH "Typedef Documentation"
.PP 
.SS "typedef struct png_stream png_stream"

.PP
Typedef for PNG stream\&. 
.PP
Definition at line 1 of file dec_png\&.c\&.
.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 "void user_read_data (png_structp png_ptr, png_bytep data, png_uint_32 length)"

.PP
Custom read function used so that libpng will read a PNG stream from memory instead of a file on disk\&. 
.PP
\fBParameters\fP
.RS 4
\fIpng_ptr\fP Pointer to PNG\&. 
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\fIdata\fP Pointer to data\&. 
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\fIlength\fP Length\&.
.RE
.PP
\fBAuthor\fP
.RS 4
Stephen Gilbert 
.RE
.PP

.PP
Definition at line 41 of file dec_png\&.c\&.
.PP
Referenced by dec_png()\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for NCEPLIBS-g2c from the source code\&.