Re: How to draw into a jpeg image

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#473

From: Giuliano
Date: Thu, 03 Jun 2004 09:18

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On Thu, 3 Jun 2004 02:06:01 -0700, "Remy Lebeau \(TeamB\)"
<gambit47.no.spam@no.spam.yahoo.com> wrote:

>
>"Giuliano" <gcardinali@remove.adhoc.net> wrote in message
>news:kcktb098ube80ktpgcev2nmccevjlui7jc@4ax.com...
>
>> As far as I know, the JPGE algorithm is lossy
>> when it encodes not when it decodes.
>
>What do you think is happening when you assign a BMP to a JPG?  It encodes
>it.  You assign a bitmap to a JPG, you lose a little.  Then you decode the
>reduced JPG to a bitmap and then encode it back to a JPG, thus losing a
>little again.  See the pattern?
>
>
>Gambit
>

What do you think is happening when you assign a JPG to a BMP? 

    Image1->Picture->Bitmap->Assign( JPG.get() );

It converts the JPG in a DIB (or DDB) and it's loseless because the lossy is
in the encoding operation, so doing 

    Image1->Picture->Bitmap->Assign( JPG.get() );

or dooing

    Image1->Picture->Bitmap->Assign( JPG.get() );

or

    Image1->Picture->Graphic = JPG.get();

is the same thing.

See the picture?

Giuliano

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From: gcardinali@remove_adhoc.net (Giuliano)
Newsgroups: borland.public.cppbuilder.multimedia
Subject: Re: How to draw into a jpeg image
Date: Thu, 03 Jun 2004 09:18:25 GMT
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