From: Tim Hunter <rmagick@...>
Date: 2008-08-26T04:46:30+09:00
Subject: Re: RMagick write fails / to_blob works

Gaspard Bucher wrote:
> I am trying to use @img.write(path) but it's not working (zero bytes
> written). Using "to_blob" works.
> 
> 
>      f = Tempfile.new('tmp_img')
> FAILING CODE:
>      @img.write(f.path)
> 
> WORKING CODE:
>      File.open(f.path, 'wb') do |f|
>        f.syswrite(@img.to_blob)
>      end

Image#write doesn't know what to do with a Tempfile object. It can only 
accept a string or a File object that's been opened for output.

Image#write calls directly into ImageMagick, and ImageMagick doesn't 
know anything about Ruby objects like Tempfiles.
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