dave wrote:
> hello
>
> i'm working on a photo gallery for my site
> which uses gd to resize pictures, this strips the exif metadata from the
> image file
>
> my plan was to grab the exif data first (this was ok), then add it back
> to the resized image (this was not ok)
>
> first, the images reverted back to their original state (or another
> state of lower quality at the original full size)
>
> then i was thinking of trying to simply add the exif data, but since
> there is no exif data, the appropriate tiff object cannot be retrieved
> to be modified
>
> is there a simple workaround for this?
>
> or am i going about this wrong?
>
> my code is a part of a larger code base, so i'll just try to post
> relevant, simplified code
>
> $jpeg = new PelJpeg();
> $jpeg->loadFile($fullFilePath);
>
> $exif = $jpeg->getSection(PelJpegMarker::APP1);
> if (is_null($exif)) {
> return null;
> }
> else {
> $tiff = $exif->getTiff();
> $ifd0 = $tiff->getIfd();
>
> $tmp = $ifd0->getSubIfds();
> // store all relevant fields (aperture, iso, shutter speed, etc.)
> in an array/structure
>
> // resize and watermark image using gd (strips the exif metadata)
>
> // re-apply original exif metadata
>
> // and write back to the file
> file_put_contents($fullFilePath, $jpeg->getBytes());
> }
>
> ideally what i need, is a way to add exif data to a new file (one that
> has no exif data), is this possible?
>
> thanks
> dave
>
>
oops, can't believe i didn't see this earlier
just get the exif data of the old file, load a new peljpeg with the new file
and use insertSection to add the APP1 section to the new jpeg
easy :D
--
http://dtracorp.com
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