png_set_text
Name
png_set_text -- stores information for image comments
Synopsis
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 structure whose
member fields include:
compression - type of compression used on text. Supported 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 comments for current keyword. Maybe NULL or empty.
text_length - length of text string after decompression. Must be 0 for iTXt
itxt_length - length of itxt string after decompression. Must be 0 for tEXt/zTXt
lang - language of comment. May be NULL or empty if language is unknown.
lang_key - translated keyword in UTF-8 coding. Maybe NULL or empty.
