🚀 go-pugleaf

"poojo hackma" <poojo.com/mail> writes:

> Does anyone know how to read the header info from a JPEG?

Certainly.


> I want to get things like the Width and Height, etc.

As for all questions regarding file formats, http://www.wotsit.org/
would be where I'd look.


> I apologize if this has been asked before, but our company has added
> newsgroups to its list of blocked websites, so I can't browse this
> online.

You have two options: change your company or change your company :-)


> Luckily, they haven't found a way to block Outlook Express from
> reading the newsgroup messages!

Interesting choice: blocking innocent web sites, but allowing
employees to use loaded weapons aimed at themselves.

Thanks Thomas.

Looks like there isn't any straight forward way to get it. I was hoping 
there was something simple, like read the DWORD at the Nth byte from the 
start of the file. What I found seems to indicate that I'd have to do a lot 
of special checking for different cases of JPEG files, and make different 
decisions based on that.

Work want this project out a little faster than that, so I'll just rig them 
up something to get by. 

> I want to get things like the Width and Height, etc.

You could load the picture wtih TJPEG and use it's
width and height properties.

-Tom

class TJpegHack : public Jpeg::TJPEGImage
{   typedef Jpeg::TJPEGImage Inherited;
public:
    virtual int __fastcall GetHeight(void)
    {
        return Inherited::GetHeight();
    };
 virtual HPALETTE __fastcall GetPalette(void)
    {
        return Inherited::GetPalette();
    };
 virtual int __fastcall GetWidth(void)
    {
        return Inherited::GetWidth();
    };
};


   std::auto_ptr<Jpeg::TJPEGImage>  pJPG(new Jpeg::TJPEGImage);
   pJPG->Assign(pBitmap.get());
   int nImageWidth =  static_cast<TJpegHack *>(pJPG.get())->GetWidth();

?
--
Michael


"poojo hackma" <poojo.com/mail> wrote in message 
news:45d606a8$1@newsgroups.borland.com...
> Thanks Thomas.
>
> Looks like there isn't any straight forward way to get it. I was hoping 
> there was something simple, like read the DWORD at the Nth byte from the 
> start of the file. What I found seems to indicate that I'd have to do a 
> lot of special checking for different cases of JPEG files, and make 
> different decisions based on that.
>
> Work want this project out a little faster than that, so I'll just rig 
> them up something to get by.
> 

"poojo hackma" <poojo.com/mail> wrote in message
news:45d5d8e7$1@newsgroups.borland.com...

> I apologize if this has been asked before, but our company has
> added newsgroups to its list of blocked websites, so I can't
> browse this online.

That is what http://www.deja.com and other public archives are for.


Gambit

Sorry. I can't get there. Our company has deja blocked. Isn't that smart of 
them?
Reason: The Websense category "Message Boards and Clubs" is filtered.

Gambit wrote:
> That is what http://www.deja.com and other public archives are for.
>
> Gambit