[Development] Rotating JPEG images by default

[Иван Комиссаров]

I think, there should be an option in Image item to use autorotation or not

2015-04-22 14:32 GMT+03:00 Alberto Mardegan <mardy at users.sourceforge.net>:

> On 04/22/2015 09:39 AM, André Somers wrote:
> > I'm with Konstatin on this one: it seems like a regression to me. It
> > would be a useful feature to add, but then add it in such a way that it
> > is actually clear what it does, the user can control it, and it does not
> > break applications. I think it _is_ relevant how the image is encoded.
>
> It may be that we disagree because we have a different view of what is
> the goal of QImage and friends. To me, what matters is not the pixel
> data, but how the image looks like when I blit it.
> I'm writing an image viewer using QML, and I just expect that
>
>    Image {
>      source: "file.jpg"
>    }
>
> will show me the file as it's intended to be viewed. I don't think that
> it's acceptable to require the developer to play with flags in order to
> see the image with the correct rotation.
>
> > If the camera really wanted to put the image in the right side up, it
> > should have just rotated the actual image. By default, I would expect to
> > load the image as-is.
>
> We disagree on what "as-is" means. :-) For me, EXIF information is an
> integral part of the image.
> Also, sometimes the camera guesses the orientation wrong (especially
> when you shoot at the sky or at the ground), and the best way to correct
> that is to do it in a lossless way, using the EXIF rotation flag; there
> are several image viewers that allow you to do this.
>
> Ciao,
>    Alberto
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