NAME

Image::Leptonica::Func::jp2kio

VERSION

version 0.04

jp2kio.c

            

              
              
jp2kio.c
    Read header
        l_int32          readHeaderJp2k()
        l_int32          freadHeaderJp2k()
        l_int32          sreadHeaderJp2k()
            
          

FUNCTIONS

freadHeaderJp2k

l_int32 freadHeaderJp2k ( FILE *fp, l_int32 *pw, l_int32 *ph, l_int32 *pspp )

            

              
              
freadHeaderJp2k()
    Input:  stream opened for read
            &w (<optional return>)
            &h (<optional return>)
            &spp (<optional return>, samples/pixel)
    Return: 0 if OK, 1 on error
            
          

readHeaderJp2k

l_int32 readHeaderJp2k ( const char *filename, l_int32 *pw, l_int32 *ph, l_int32 *pspp )

            

              
              
readHeaderJp2k()
    Input:  filename
            &w (<optional return>)
            &h (<optional return>)
            &spp (<optional return>, samples/pixel)
    Return: 0 if OK, 1 on error
            
          

sreadHeaderJp2k

l_int32 sreadHeaderJp2k ( const l_uint8 *data, size_t size, l_int32 *pw, l_int32 *ph, l_int32 *pspp )

            

              
              
sreadHeaderJp2k()
    Input:  data
            size
            &w (<optional return>)
            &h (<optional return>)
            &spp (<optional return>, samples/pixel)
    Return: 0 if OK, 1 on error
Notes:
    (1) The metadata is stored as follows:
        h:    4 bytes @ 48
        w:    4 bytes @ 52
        spp:  2 bytes @ 56
            
          

AUTHOR

Zakariyya Mughal <zmughal@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2014 by Zakariyya Mughal.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.