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pixbuf setoption not effective

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huangyy
Posted Thu, 27 Sep 2018 08:42:39 GMT
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I resize a image, read source image's orientation, use setOption method write to new pixbuf and save. 

srcPixbuf = new Pixbuf(/path/to/source/image);
string isRot = srcPixbuf.getOption("orientation");
writeln(isRot);
dstPixbuf = srcPixbuf.scaleSimple(nw, nh, InterpType.BILINEAR);
bool isOK = dstPixbuf.setOption("orientation", isRot);
if (isOK) {
     dstPixbuf.savev("dst.jpg","jpeg",["quality"],["95"]);
} else {
     writeln("set Option fail.");
}

read source image's orientation is 8, write orientation of dstpixbuf is successful and return true. But, read dst.jpg, it's orientation is null.
it's Not written?

Re: pixbuf setoption not effective

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Mike Wey
Posted Sun, 30 Sep 2018 22:49:29 +0200 in reply to huangyy
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On 9/27/18 10:42 AM, huangyy wrote:

read source image's orientation is 8, write orientation of dstpixbuf is successful and return true. But, read dst.jpg, it's orientation is null.
it's Not written?

As far as i can tell GdkPixbuf doesn't save the EXIF data to the file.

Re: pixbuf setoption not effective

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huangyy
Posted Mon, 01 Oct 2018 13:58:35 GMT in reply to Mike Wey
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On Sun, 30 Sep 2018 22:49:29 +0200, Mike Wey wrote:

On 9/27/18 10:42 AM, huangyy wrote:

read source image's orientation is 8, write orientation of dstpixbuf is successful and return true. But, read dst.jpg, it's orientation is null.
it's Not written?

As far as i can tell GdkPixbuf doesn't save the EXIF data to the file.

how to save the EXIF data to a image ?