[Interest] iOS libpng conflicts with another lib
Konstantin Tokarev
annulen at yandex.ru
Wed Feb 7 14:50:59 CET 2018
07.02.2018, 16:25, "maitai" <maitai at virtual-winds.org>:
> Yes I know, but if I use jpeg2000 i will have another conflict for sure
> since I do use jpeg2000 lib (and jasper) to decode gribs in my app.
Apple's decoder should not conflict with jasper. However, I would not
recommend to use jasper for anything, it's obsolete and very incomplete
implementation (IIRC it support no extensions from part 2)
I
> agree Webp is another possibility, since it is also supported by gdal, I
> might gice it a try, thanks.
>
> Le 07-02-2018 13:56, Konstantin Tokarev a écrit :
>> 07.02.2018, 15:46, "maitai" <maitai at virtual-winds.org>:
>>> Thanks Konstantin for the good advices, I'll keep that in mind if
>>> finally I decide to give it a try. For the time being I managed to
>>> cheat
>>> by using a tif instead of a png, just for iOS.
>>
>> That's not the best format. Try jpeg2k or webp instead (plugins "webp"
>> and "macjp2" in qtimageformats module)
>>
>>> Thanks again
>>> Philippe.
>>>
>>> Le 07-02-2018 13:12, Konstantin Tokarev a écrit :
>>>> 07.02.2018, 09:44, "maitai" <maitai at virtual-winds.org>:
>>>>> Thanks you for your replies
>>>>>
>>>>> I will decide to compile qt on iOS when I will be retired and
>>>>> nothing
>>>>> else to do, too much a pain with lipo and all ;)
>>>>
>>>> lipo is not hard to use at all, however there should be no need to
>>>> use
>>>> it when building Qt.
>>>>
>>>> Fo example, configure line [1] initiates build for 4 architectures
>>>> (-arch armv7 -arch arm64 -arch i386 -arch x86_64)
>>>>
>>>> See build log [2] for example (this is build configuration used for
>>>> official
>>>> iOS packages).
>>>>
>>>> All you need to change is to add -I and -L options to configure to
>>>> specify
>>>> location of libpng headers and library. Make sure that configure
>>>> summary
>>>> states "Using system libpng .... yes".
>>>>
>>>> [1] configure -xplatform macx-ios-clang -no-sql-mysql -no-sql-psql
>>>> -plugin-sql-sqlite -opensource -confirm-license -nomake tests
>>>> -verbose
>>>> -prefix /Users/qt/work/install -debug-and-release -static -no-icu
>>>> -nomake examples
>>>>
>>>> [2]
>>>> https://testresults.qt.io/coin/api/results/qt/qtbase/1860a91eeb370b10677cb1813752739361011015/MacOSMacOS_10_12x86_64IOSIOS_ANYmultiClangqtci-macos-10.12-x86_64-8-9dffb3DebugAndRelease_DisableTests_Static/2a48a3b7dcb9652b1532a3ad14de7580b5b9b1ee/build_1517672826/log.txt.gz
>>>
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--
Regards,
Konstantin
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