On July 16, 2014 5:05:01 PM CEST, Markus Teich <markus.te...@stusta.mhn.de> 
wrote:
>Lee Fallat wrote:
>> fseek(filehandle, 0, SEEK_END);
>> height = (ftell(filehandle) / RGBA_CHANNEL_SIZE) / width;
>> 
>> Then you allocate your buffer.
>
>Heyho Lee,
>
>This needs FILE* instead of just a file descriptor, making usage in
>pipes
>intractable.
>
>--Markus

fstat() works on file descriptors and you can use it on stdin even if it is a 
pipe.
Still, storing width _and_ height in the header won't really hurt.

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