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Groups > comp.lang.c > #96684

Re: PNG coding

From Richard Heathfield <rjh@cpax.org.uk>
Newsgroups comp.lang.c
Subject Re: PNG coding
Date 2016-11-16 13:57 +0000
Organization Fix this later
Message-ID <o0hoim$hra$1@dont-email.me> (permalink)
References (1 earlier) <efb414a2-37fd-f415-1353-d92dad04592b@verizon.net> <o0fvki$c8n$1@dont-email.me> <58044c2b-c4d4-cfd7-7142-2b5ca73a6c28@verizon.net> <o0g2tk$ou4$1@dont-email.me> <20161116152343.8f327ba657c914b38a9a8492@g{oogle}mail.com>

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On 16/11/16 12:23, Anton Shepelev wrote:
> Richard Heathfield:
>
>> I  can't  speak for Ruben's needs. But if anyone is
>> planning to write a simple  PNG  library,  I  would
>> recommend the following interface:
>>
>> /* returns width*height unsigned longs, encoding RGBA 00-FF */
>> unsigned long *png_load(const char *filename,
>>                         size_t *width,
>>                         size_t *height);
>>
>> int png_save(const char filename,
>>              unsigned long *frame,
>>              size_t width,
>>              size_t height);
>>
>> And *nothing else*!
>
> Why  do  you  return  a  potentially  sparce matrix?

Well, I don't return anything, because that's a suggested interface, not 
a report of existing code. But why /would/ I? Because it's easy to 
understand and easy to incorporate into one's own code, that's why. Them 
as wants complicated can use libpng.

-- 
Richard Heathfield
Email: rjh at cpax dot org dot uk
"Usenet is a strange place" - dmr 29 July 1999
Sig line 4 vacant - apply within

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Thread

PNG coding ruben safir <ruben@mrbrklyn.com> - 2016-11-15 14:40 -0500
  Re: PNG coding "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2016-11-15 12:02 -0800
    Re: PNG coding ruben safir <ruben@mrbrklyn.com> - 2016-11-15 15:20 -0500
      Re: PNG coding "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2016-11-15 12:25 -0800
  Re: PNG coding "James R. Kuyper" <jameskuyper@verizon.net> - 2016-11-15 15:34 -0500
    Re: PNG coding Popping mad <rainbow@colition.gov> - 2016-11-15 20:57 +0000
      Re: PNG coding "James R. Kuyper" <jameskuyper@verizon.net> - 2016-11-15 16:12 -0500
      Re: PNG coding jadill33@gmail.com - 2016-11-15 14:00 -0800
        Re: PNG coding Jorgen Grahn <grahn+nntp@snipabacken.se> - 2016-11-20 11:14 +0000
    Re: PNG coding Richard Heathfield <rjh@cpax.org.uk> - 2016-11-15 21:45 +0000
      Re: PNG coding "James R. Kuyper" <jameskuyper@verizon.net> - 2016-11-15 17:15 -0500
        Re: PNG coding Richard Heathfield <rjh@cpax.org.uk> - 2016-11-15 22:41 +0000
          Re: PNG coding Melzzzzz <mel@zzzzz.com> - 2016-11-15 23:49 +0100
          Re: PNG coding Anton Shepelev <anton.txt@g{oogle}mail.com> - 2016-11-16 15:23 +0300
            Re: PNG coding Richard Heathfield <rjh@cpax.org.uk> - 2016-11-16 13:57 +0000
              Re: PNG coding BGB <cr88192@hotmail.com> - 2016-11-18 01:24 -0600
                Re: PNG coding BartC <bc@freeuk.com> - 2016-11-18 11:56 +0000
                Re: PNG coding BGB <cr88192@hotmail.com> - 2016-11-18 12:48 -0600
                Re: PNG coding BartC <bc@freeuk.com> - 2016-11-19 00:21 +0000
                Re: PNG coding BGB <cr88192@hotmail.com> - 2016-11-19 01:50 -0600
        Re: PNG coding Melzzzzz <mel@zzzzz.com> - 2016-11-15 23:42 +0100
        Re: PNG coding BGB <cr88192@hotmail.com> - 2016-11-15 17:53 -0600
          Re: PNG coding "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2016-11-15 16:25 -0800
        Re: PNG coding raltbos@xs4all.nl (Richard Bos) - 2016-11-18 08:15 +0000
          Re: PNG coding jameskuyper@verizon.net - 2016-11-18 09:35 -0800
          Re: PNG coding supercat@casperkitty.com - 2016-11-20 14:34 -0800
      Re: PNG coding BartC <bc@freeuk.com> - 2016-11-16 19:38 +0000
        Re: PNG coding Richard Heathfield <rjh@cpax.org.uk> - 2016-11-16 22:16 +0000
  Re: PNG coding "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2016-11-16 21:14 +0800
  Re: PNG coding Jean-marc Lienher <jean-marc.lienher@bluewin.ch> - 2016-11-16 20:55 +0100
    Re: PNG coding BartC <bc@freeuk.com> - 2016-11-16 20:31 +0000
    Re: PNG coding Richard Heathfield <rjh@cpax.org.uk> - 2016-11-16 22:24 +0000

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