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Joćo Pereira
Guest
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 Posted: Mon Oct 06, 2003 12:08 pm Post subject: How to get jpeg color depth? |
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How is it possible to do that with TJPEGImage or else...
I've try this:
| Quote: | TJPEGImage *Jpeg = new TJPEGImage;
Graphics::TBitmap *bmp = new Graphics::TBitmap;
Jpeg->LoadFromFile(OpenDialog1->Files->Strings[num]);
bmp->Assign(Jpeg);
switch(bmp->PixelFormat)
{
case 0: LColorA->Caption="pfDevice";
break;
case 1: LColorA->Caption="pf1bit";
break;
case 2: LColorA->Caption="pf4bit";
break;
case 3: LColorA->Caption="pf8bit";
break;
case 4: LColorA->Caption="pf15bit";
break;
case 5: LColorA->Caption="pf16bit";
break;
case 6: LColorA->Caption="pf24bit";
break;
case 7: LColorA->Caption="Costum";
break;
}
... |
but it always return pf24bit.
Thx in advance.
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Hans Galema
Guest
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| Posted: Mon Oct 06, 2003 1:11 pm Post subject: Re: How to get jpeg color depth? |
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Joćo Pereira wrote:
| Quote: | How is it possible to do that with TJPEGImage or else...
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Please do not refer to the Subject. (Second time).
| Quote: | I've try this:
...
...
but it always return pf24bit.
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You were already told how that was possible. You did not reply
to that post, but instead replied to your own post thereby
neglecting the reply. Why ?
You also got a hint. To help you more: place the cursor in the
word TJPEGImage. Hit F1 and choose Properties. There you will
see a PixelFormat. You can also look at the Palette.
Hans.
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Joćo Pereira
Guest
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| Posted: Mon Oct 06, 2003 1:46 pm Post subject: Re: How to get jpeg color depth? |
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sorry about that, but i've update my outlook and it has deleted my newsgroup
message.
So i haven't read your post, could you help me again?
what's wrong with the code that i've post?
Thx again
"Hans Galema" <j.m.galema.dontusethis (AT) maartens (DOT) nl> wrote
| Quote: | Joćo Pereira wrote:
How is it possible to do that with TJPEGImage or else...
Please do not refer to the Subject. (Second time).
I've try this:
...
...
but it always return pf24bit.
You were already told how that was possible. You did not reply
to that post, but instead replied to your own post thereby
neglecting the reply. Why ?
You also got a hint. To help you more: place the cursor in the
word TJPEGImage. Hit F1 and choose Properties. There you will
see a PixelFormat. You can also look at the Palette.
Hans.
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Hans Galema
Guest
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| Posted: Mon Oct 06, 2003 2:26 pm Post subject: Re: How to get jpeg color depth? |
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Joćo Pereira wrote:
| Quote: | what's wrong with the code that i've post?
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Just told you. And you could read my other posts too.
But to be more clear: do away with:
| Quote: | switch(bmp->PixelFormat)
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For determining the PixelFormat of a jpg file you should not
assign it to a bitmap but investigate the instance of TJPEGImage.
TJPEGImage *Jpeg = new TJPEGImage;
Jpeg->LoadFromFile(OpenDialog1->Files->Strings[num]);
Now you should have a look at
Jpeg->PixelFormat
or
Jpeg->Palette
Look in the help for more info.
Hans.
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