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[DEMO] iPhone image rotation by exif data
#262977 07/26/2019 12:07 PM
Joined: Apr 2004
Posts: 1,718
Likes: 63
isaac Offline OP
UBB.threads Developer
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UBB.threads Developer
Joined: Apr 2004
Posts: 1,718
Likes: 63
The images in this set of three posts were taken by an iPhone.


UBB.threads 7.7.2 and older
Without JPEG image orientation fixes

IMAGE 1 ORIENTATION with GD2
Firefox: Wrong
Chrome: Wrong
Safari: Wrong
Edge: Wrong.

vs

IMAGE 2 ORIENTATION with ImageMagick
Firefox: Wrong
Chrome: Wrong
Safari: Good, but displays incorrectly in Lightbox viewer because of wrong EXIF data.
Edge: Wrong

Attached Files
2019-07-26 08.51.40.jpg 2019-07-26 08.51.40.jpg

Current developer of UBB.threads PHP Forum Software // 7.7.4 released!
isaac @ id242.com // my forum @ CelicaHobby.com
Re: [DEMO] iPhone image rotation by exif data
isaac #262978 07/26/2019 12:08 PM
Joined: Apr 2004
Posts: 1,718
Likes: 63
isaac Offline OP
UBB.threads Developer
OP Offline
UBB.threads Developer
Joined: Apr 2004
Posts: 1,718
Likes: 63
UBBCentral does not have the PHP exif_read_data function installed/enabled (uncommon).
https://www.php.net/manual/en/function.exif-read-data.php

This is a demo of what happens in that case.


UBB.threads 7.7.3 and newer, with jpeg image orientation fixes

IMAGE 1 ORIENTATION with GD2, function_exists('exif_read_data') = false
Firefox: Wrong
Chrome: Wrong
Safari: Wrong
Edge: Wrong

vs

IMAGE 2 ORIENTATION with ImageMagick, function_exists('exif_read_data') = false
Firefox: Good
Chrome: Good
Safari: Good
Edge: Good

Attached Files
2019-07-26 08.51.40.jpg 2019-07-26 08.51.40.jpg

Current developer of UBB.threads PHP Forum Software // 7.7.4 released!
isaac @ id242.com // my forum @ CelicaHobby.com
Re: [DEMO] iPhone image rotation by exif data
isaac #262979 07/26/2019 12:15 PM
Joined: Apr 2004
Posts: 1,718
Likes: 63
isaac Offline OP
UBB.threads Developer
OP Offline
UBB.threads Developer
Joined: Apr 2004
Posts: 1,718
Likes: 63
This is a demo of the PHP exif_read_data function installed and enabled.


UBB.threads 7.7.3 and newer, with jpeg image orientation fixes

IMAGE 1 ORIENTATION with GD2, function_exists('exif_read_data') = true
Firefox: Good
Chrome: Good
Safari: Good
Edge: Good

vs

IMAGE 2 ORIENTATION with ImageMagick, function_exists('exif_read_data') = true
Firefox: Good
Chrome: Good
Safari: Good
Edge: Good

Attached Files
2019-07-26 08.51.40.jpg 2019-07-26 08.51.40.jpg

Current developer of UBB.threads PHP Forum Software // 7.7.4 released!
isaac @ id242.com // my forum @ CelicaHobby.com
Re: [DEMO] iPhone image rotation by exif data
isaac #262980 07/26/2019 1:43 PM
Joined: Dec 2003
Posts: 6,183
Likes: 28
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Joined: Dec 2003
Posts: 6,183
Likes: 28
Impressive.
So this fixes orientation for any picture with the phone upright,sideways or upside down?


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There is no such thing as stupid questions. Just stupid answers

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