png_set_text

Name

png_set_text -- stores information for image comments

Synopsis

#include <png.h>

void png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, int num_text);

Description

png_set_text() shall store information for image comments given in text_ptr to info_ptr. text_ptr is an array of size num_text of png_text structures whose member fields include:

compression 

type of compression used on text. Valid values are:

PNG_TEXT_COMPRESSION_NONE
PNG_TEXT_COMPRESSION_zTXt
PNG_ITXT_COMPRESSION_NONE
PNG_ITXT_COMPRESSION_zTXt

key 

keyword for comment. Must contain 1-79 characters.

text 

text comment for current keyword. May be empty.

text_length 

length of text string after decompression. 0 for iTXt.