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We parse the EXIF header in order to get the proper orientation, so
let's be a bit more careful in what we accept. This patch adds better
handling for reading past the end of the stream, plus it limits the
number of IFDs read (to avoid processing too much data) and deals with a
pathological case of the EXIF file format: EXIF (due to its TIFF
origins) permits the offset to the next IFD to be backwards in the file,
which means it could result in a loop or pointing to plain corrupt data.
We disallow any backwards pointers, since it seems that's what other
decoders do (libexif, for example).
Change-Id: Iaeecaffe26af4535b416fffd1489332db92e3888
(cherry picked from 5.6 commit 02150649f95b8f46f826e6e002be3fa0b6d009bc)
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
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Task-number: QTBUG-46870
Change-Id: Idfde92ca12336c6432798b4517e244c2f5a5ba4d
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@theqtcompany.com>
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Make it possible to read images with EXIF orientation automatically
applied. This was originally implemented without opt-out in Qt 5.4, but
reverted. Here it is implemented as opt-in for JPEG, and opt-out for TIFF
to keep behavioral consistency.
The EXIF support for JPEG was written by Rainer Keller.
[ChangeLog][QtGui][Image plugins] An option has been added to
QImageReader to enable automatic application of EXIF orientation.
This behavior was default in Qt 5.4.1, but reverted in Qt 5.4.2.
Task-number: QTBUG-37946
Task-number: QTBUG-43563
Task-number: QTBUG-45552
Task-number: QTBUG-45865
Change-Id: Iaafd2519b63ede66ecc1f8aa4c7118081312b8f5
Reviewed-by: Gunnar Sletta <gunnar@sletta.org>
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Due to a behavior change.
This reverts commit 9157087334186ff3ef811f2ec234a3bf5d4a4889.
This reverts commit 16c32c6dfbca03a46d1a2bb87b6c1c365e6179d5.
Task-number: QTBUG-37946
Task-number: QTBUG-45552
Task-number: QTBUG-43563
Change-Id: Idf8df7d8f22465e8f6b51acb68993ac97208b184
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Gunnar Sletta <gunnar@sletta.org>
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The orientation is unsigned short, read it as such. In
JPEG-files created by Ricoh/Pentax cameras, the data is saved in
Motorola format. Reading the wrong data size will produce invalid
values when converting the byte order.
Change-Id: I8f7c5dc5bfc10c02e090d3654aaefa047229a962
Task-number: QTBUG-43563
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
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Task-number: QTBUG-37946
Change-Id: I181f88acdff0ef76aa02e968dc6afca1ed495f38
Reviewed-by: aavit <eirik.aavitsland@digia.com>
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The tiff plugin and bundled libtiff is moving to the qtimageformats
project on Gerrit.
Task-number: QTBUG-23887
Change-Id: I4c848232fdccddd7e7f54215f9eaa78dc4c3a53d
Reviewed-by: Kent Hansen <kent.hansen@nokia.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
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Task-number: QTBUG-21133
Change-Id: I83b8f652935cf92151265ca2530a3cf81c31fdef
Reviewed-on: http://codereview.qt.nokia.com/3996
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Jo Asplin <jo.asplin@nokia.com>
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