get type from the text of image

[Monte Goulding]

OK.. came up with the following based on a StackOverflow answer on doing this in C. Anyone have anything better?:

function imageDataExtension pData
   if char 1 to 4 of pData is "GIF8" then
      return "gif"
   else if byteToNum(char 1 of pData) is 255 and  byteToNum(char 2 of pData) is 216 then
      return "jpg"
   else if byteToNum(char 1 of pData) is 137 and  byteToNum(char 2 of pData) is 80 and \
         byteToNum(char 1 of pData) is 78 and  byteToNum(char 2 of pData) is 71 then
      return "png"
   else if byteToNum(char 1 of pData) is 46 and  byteToNum(char 2 of pData) is 77 then
      return "bmp"
   else
      return "image"
   end if
end imageDataExtension

On 23/02/2013, at 7:40 AM, Monte Goulding <monte at sweattechnologies.com> wrote:

> Hi
> 
> Has anyone got a handler that works out the image type from the text of the image. I want to save the text of an image but I want to do so with the correct extension. I don't want to use the export command because of the risk of some quality loss from the image.
> 
> This is for the VCS stuff I'm working on so it would need to have some open source license.
> 
> Cheers
> 
> Monte
> --
> Monte Goulding
> 
> M E R Goulding - software development services
> mergExt - There's an external for that!
> 
> 
> 
> 
> 
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--
Monte Goulding

M E R Goulding - software development services
mergExt - There's an external for that!