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Image Displayer

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  Image Displayer "Chase Preuninger" <chase.preuninger@THRWHITE.remove-dii-this> - 2011-04-27 15:45 +0000
    Re: Image Displayer "mekane" <mekane@THRWHITE.remove-dii-this> - 2011-04-27 15:45 +0000
      Re: Image Displayer "Chase Preuninger" <chase.preuninger@THRWHITE.remove-dii-this> - 2011-04-27 15:45 +0000
    Re: Image Displayer "Philipp" <philipp@THRWHITE.remove-dii-this> - 2011-04-27 15:45 +0000
    Re: Image Displayer "Roedy Green" <roedy.green@THRWHITE.remove-dii-this> - 2011-04-27 15:45 +0000

#3483 — Image Displayer

  To: comp.lang.java.programmer
I want to figure out how to read a JPG file by just using the read
method in the InputStream class then I want to create a GUI component
that can display it.

1) How are the bytes formatted in a JPG file?
2) What is the best way to color individual pixels in a JComponent.

Please don't tell me to just use ImageIO and to draw it using a
Graphics object because I know how to do that.

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#3484

  To: comp.lang.java.programmer
Chase Preuninger wrote:
> I want to figure out how to read a JPG file by just using the read
> method in the InputStream class then I want to create a GUI component
> that can display it.
> 
> 1) How are the bytes formatted in a JPG file?

Have you Googled for the JPEG spec?


> 2) What is the best way to color individual pixels in a JComponent.
> 
> Please don't tell me to just use ImageIO and to draw it using a
> Graphics object because I know how to do that.


If I were you I would use the ImagIO packa-- oh, yeah, never mind. Good 
luck with your project.

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#3485

  To: comp.lang.java.programmer
I'm just intrested in seeing if I can do it.

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#3487

  To: comp.lang.java.programmer
Chase Preuninger wrote:
> 1) How are the bytes formatted in a JPG file?

In case you are also interested in other formats, see this very useful page:
http://www.martinreddy.net/gfx/2d-hi.html

HTH Phil

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#3491

  To: comp.lang.java.programmer
On Thu, 8 May 2008 13:30:10 -0700 (PDT), Chase Preuninger
<chasepreuninger@gmail.com> wrote, quoted or indirectly quoted someone
who said :

>1) How are the bytes formatted in a JPG file?

See http://mindprod.com/jgloss/jpg.html
http://mindprod.com/jgloss/gif.html
and follow the links.

If all you want is size info quickly, download
http://mindprod.com/products1.html#COMMON11
and look at ImageInfo

If you just want to mess around at a low level, tackle GIF or PNG
first. They are much simpler formats.
-- 

Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com

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