GFL_BITMAP Xdpi & Ydpi

Discussions on GFL SDK, the graphic library for reading and writing graphic files

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dominique
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GFL_BITMAP Xdpi & Ydpi

Post by dominique » Wed Jul 01, 2009 1:27 pm

Using this code with v3.05 of gflsdk, I can't have correct information about dpi while saving image in JPEG

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mpBitmap->Xdpi = lMetaData->mXDpi;
mpBitmap->Ydpi = lMetaData->mYDpi;
I thought it worked in the version 2.90
Any information about this?
Thx in advance ;)
Dom

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dominique
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Re: GFL_BITMAP Xdpi & Ydpi

Post by dominique » Wed Jul 01, 2009 1:40 pm

Looking in the header, I can't find the information of resolution :
FFD8FFE1
Instead of :
FFD8FFE000104A46494600010201012C012C0000FFE1
0x12C = 300
Do you miss something here ?
Dom

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dominique
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Re: GFL_BITMAP Xdpi & Ydpi

Post by dominique » Wed Jul 01, 2009 3:58 pm

I found that if I use

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gflBitmapRemoveMetaData(mpBitmap);
gflBitmapSetEXIF2(mpBitmap, EXIFData2);
the resolution is not more present in the jpeg header.
Without this, resolution is present in the jpeg header.

Using this code with v 2.90 is ok
Something has changed in version 3.05
Dom

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xnview
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Re: GFL_BITMAP Xdpi & Ydpi

Post by xnview » Thu Jul 02, 2009 7:04 am

And only

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gflBitmapRemoveMetaData(mpBitmap);
??
Pierre.

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dominique
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Re: GFL_BITMAP Xdpi & Ydpi

Post by dominique » Thu Jul 02, 2009 9:16 am

So it's not an exif problem but IPTC.
With the previous version of GFL I use to had IPTC data this way after saving JPEG image :

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gflSaveIPTC(mFileOut.c_str(), mIPTCData);
Using this the jpeg image lost resolution information in his header.
Perhaps there is an other way to had IPTC with 3.05 version?
Dom

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dominique
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Re: GFL_BITMAP Xdpi & Ydpi

Post by dominique » Thu Jul 02, 2009 9:21 am

Ok, I use this after erasing all meta data :

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gflSetIPTCValue(mIPTCData, GFL_IPTC_PROGRAM, "My Software");
gflBitmapSetIPTC(mOriBitmap, mIPTCData);
That's work fine !
So perhaps there is something bad in

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gflSaveIPTC(mFileOut.c_str(), mIPTCData);
Dom

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dominique
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Re: GFL_BITMAP Xdpi & Ydpi

Post by dominique » Thu Jul 02, 2009 11:52 am

Thanks for corrections !!!
Great job,
Dom

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