Imager::File::PNG - PNG File Format

Perl Tutorials - Herong's Tutorial Examples

∟Imager::File::PNG - PNG File Format

This section provides a tutorial example on how to install Imager::File::PNG Perl module using CPAN Shell. Installation failed with 'lpng' library missing.

Note that the Perl Imager module only supports bmp, ico, pnm, raw, sgi and tga image file formats.

If you try to write an image in PNG file format, you will get an error:

herong$ perl Imager-Convert-Format.pl sample.png
format 'png' not supported - formats bmp, ico, pnm, raw, sgi, tga available
for reading - Can't locate Imager/File/PNG.pm
at Imager-Convert-Format.pl line 11.

To support PNG file format, you need to install the Imager::File::PNG module as suggested in the error message.

herong$ perl -MCPAN -e shell

cpan[1]> install Imager::File::PNG
Running install for module 'Imager::File::PNG'
Running make for T/TO/TONYC/Imager-File-PNG-0.94.tar.gz
Fetching with LWP:
http://cpan.mirrors.ovh.net/.../id/T/TO/TONYC/Imager-File-PNG-0.94.tar.gz
...
CPAN.pm: Building T/TO/TONYC/Imager-File-PNG-0.94.tar.gz
PNG: building independently
PNG: Generic: includes not found - libraries not found
...
PNG: base (+libz): includes not found - libraries not found
...
PNG: Checking if the compiler can find them on its own
Warning (mostly harmless): No library found for -lpng

PNG: Test code failed: Can't link/include 'png.h', 'stdio.h', 'png'
OS unsupported: PNG libraries or headers not found
Warning: No success on command[/usr/bin/perl Makefile.PL]
'YAML' not installed, will not store persistent state
  TONYC/Imager-File-PNG-0.94.tar.gz
  /usr/bin/perl Makefile.PL -- NOT OK
Running make test
  Make had some problems, won't test
Running make install
  Make had some problems, won't install