Deployed program fails to load JPEG

Christian Ehrlicher

@closer_ex said in Deployed program fails to load JPEG:

Note these are Qt Creator output

So this does not help as we know it works there.

/edit:

I am looking for a way to get output from my deployed program

I would take a look at windbg or similar or compile the program so it opens a command prompt (pro: CONFIG += console)

closer_ex

@Christian-Ehrlicher said in Deployed program fails to load JPEG:

@closer_ex said in Deployed program fails to load JPEG:

Note these are Qt Creator output

So this does not help as we know it works there.

/edit:

I am looking for a way to get output from my deployed program

I would take a look at windbg or similar or compile the program so it opens a command prompt (pro: CONFIG += console)

CONFIG += console does open a console window, but it only produce plugin debug output when running from Qt Creator(not after deploying, should I try deploy a debug version?)

windbg result:

CommandLine: "F:\cutexg music\QXGMusic_win10.exe"

************* Path validation summary **************
Response                         Time (ms)     Location
Deferred                                       srv*
Symbol search path is: srv*
Executable search path is: 
ModLoad: 00007ff6`7f960000 00007ff6`7f9c0000   image00007ff6`7f960000
ModLoad: 00007fff`00f10000 00007fff`01105000   ntdll.dll
ModLoad: 00007ffe`ff8c0000 00007ffe`ff97d000   C:\WINDOWS\System32\KERNEL32.DLL
ModLoad: 00007ffe`fe650000 00007ffe`fe917000   C:\WINDOWS\System32\KERNELBASE.dll
ModLoad: 00007fff`00da0000 00007fff`00ec9000   C:\WINDOWS\System32\ole32.dll
ModLoad: 00007ffe`fea90000 00007ffe`feb90000   C:\WINDOWS\System32\ucrtbase.dll
ModLoad: 00007fff`00c10000 00007fff`00d34000   C:\WINDOWS\System32\RPCRT4.dll
ModLoad: 00007ffe`ffb30000 00007ffe`ffe85000   C:\WINDOWS\System32\combase.dll
ModLoad: 00007fff`00a70000 00007fff`00a9a000   C:\WINDOWS\System32\GDI32.dll
ModLoad: 00007ffe`fef40000 00007ffe`fef62000   C:\WINDOWS\System32\win32u.dll
ModLoad: 00007ffe`fe980000 00007ffe`fea89000   C:\WINDOWS\System32\gdi32full.dll
ModLoad: 00007ffe`febe0000 00007ffe`fec7d000   C:\WINDOWS\System32\msvcp_win.dll
ModLoad: 00007ffe`ff980000 00007ffe`ffb20000   C:\WINDOWS\System32\USER32.dll
ModLoad: 00007ffe`8f260000 00007ffe`8f7a7000   F:\cutexg music\Qt5Widgets.dll
ModLoad: 00007ffe`830d0000 00007ffe`83693000   F:\cutexg music\Qt5Core.dll
ModLoad: 00007ffe`95130000 00007ffe`9527f000   F:\cutexg music\Qt5Network.dll
ModLoad: 00007ffe`8d8e0000 00007ffe`8dfb6000   F:\cutexg music\Qt5Gui.dll
ModLoad: 00007ffe`fed60000 00007ffe`feebd000   C:\WINDOWS\System32\CRYPT32.dll
ModLoad: 00007ffe`fffc0000 00007fff`00701000   C:\WINDOWS\System32\SHELL32.dll
ModLoad: 00007ffe`ff6f0000 00007ffe`ff79a000   C:\WINDOWS\System32\ADVAPI32.dll
ModLoad: 00007fff`00710000 00007fff`007ae000   C:\WINDOWS\System32\msvcrt.dll
ModLoad: 00007ffe`fef70000 00007ffe`ff00b000   C:\WINDOWS\System32\sechost.dll
ModLoad: 00007ffe`ef2a0000 00007ffe`ef331000   C:\WINDOWS\SYSTEM32\MSVCP140.dll
ModLoad: 00007ffe`fff50000 00007ffe`fffbb000   C:\WINDOWS\System32\WS2_32.dll
ModLoad: 00007ffe`c9750000 00007ffe`c985a000   C:\WINDOWS\SYSTEM32\MFReadWrite.dll
ModLoad: 00007ffe`d1a10000 00007ffe`d1bcb000   C:\WINDOWS\SYSTEM32\MFPlat.DLL
ModLoad: 00007ffe`efb40000 00007ffe`efb59000   C:\WINDOWS\SYSTEM32\VCRUNTIME140.dll
ModLoad: 00007ffe`feb90000 00007ffe`febdd000   C:\WINDOWS\System32\cfgmgr32.dll
ModLoad: 00007ffe`efb30000 00007ffe`efb3c000   C:\WINDOWS\SYSTEM32\VCRUNTIME140_1.dll
ModLoad: 00007ffe`ffea0000 00007ffe`fff4e000   C:\WINDOWS\System32\shcore.dll
ModLoad: 00007ffe`fdb20000 00007ffe`fdbeb000   C:\WINDOWS\SYSTEM32\DNSAPI.dll
ModLoad: 00007ffe`fdae0000 00007ffe`fdb1b000   C:\WINDOWS\SYSTEM32\IPHLPAPI.DLL
ModLoad: 00007ffe`fc2c0000 00007ffe`fc2ef000   C:\WINDOWS\SYSTEM32\dwmapi.dll
ModLoad: 00007ffe`fc0d0000 00007ffe`fc16f000   C:\WINDOWS\SYSTEM32\UxTheme.dll
ModLoad: 00007ffe`faae0000 00007ffe`faae9000   C:\WINDOWS\SYSTEM32\MSVCP140_1.dll
ModLoad: 00007ffe`fa730000 00007ffe`fa993000   C:\WINDOWS\SYSTEM32\d3d11.dll
ModLoad: 00007ffe`fcf90000 00007ffe`fd083000   C:\WINDOWS\SYSTEM32\dxgi.dll
ModLoad: 00007ffe`fe540000 00007ffe`fe56e000   C:\WINDOWS\SYSTEM32\USERENV.dll
ModLoad: 00007ffe`f90e0000 00007ffe`f90ea000   C:\WINDOWS\SYSTEM32\VERSION.dll
ModLoad: 00007ffe`e4040000 00007ffe`e405d000   C:\WINDOWS\SYSTEM32\MPR.dll
ModLoad: 00007ffe`f02e0000 00007ffe`f02f8000   C:\WINDOWS\SYSTEM32\NETAPI32.dll
ModLoad: 00007ffe`f2c10000 00007ffe`f2c37000   C:\WINDOWS\SYSTEM32\WINMM.dll
ModLoad: 00007ffe`fdbf0000 00007ffe`fdbfc000   C:\WINDOWS\SYSTEM32\NETUTILS.DLL
ModLoad: 00007ffe`eae10000 00007ffe`eae38000   C:\WINDOWS\SYSTEM32\SRVCLI.DLL
ModLoad: 00007ffe`fe030000 00007ffe`fe03c000   C:\WINDOWS\SYSTEM32\CRYPTBASE.DLL
(1b9c.c8c): Break instruction exception - code 80000003 (first chance)
ntdll!LdrInitShimEngineDynamic+0x360:
00007fff`00fe0630 cc              int     3

Does this mean only the basic Qt modules are loaded?
I used Dependencies before and it showed the same structure.

Christian Ehrlicher

WinDbg has also a mode to catch the debug output afaik.

As you see there are no plugins loaded. Is you jpeg plugin really in F:\cutexg music\imageformats ?

Bonnie

@closer_ex
I'm not a WinDbg expert, but with only these output, your UI probably haven't shown yet, right?
You need to give it a "Go" from the "Debug" menu because it will auto break at the start.

closer_ex

@Christian-Ehrlicher
Yes they are, that's why I'm so confused. More output listed below, but still no image plugins loaded.

I've also added config += release to make sure it uses release version plugins.

Here is my deploy folder structure:( sorry images are uploaded to imgur, please click link to see)
root

Inside /imageformats are plugins copied by windeployqt and are release version:

And by "doesn't load" I mean something like this:
jpeg not loaded

Running from Qt Creator:
jpeg loaded

There is another phenomenon that might help, as is mentioned in the main post:

I kept a former version exe under the same deploy folder, which had no problem loading jpeg. I moved the qjpeg.dll out of the /imageformats folder, run it and saw the same null pixmap. Then I move the dll back, but this former one still can't load jpeg.

@Bonnie
Thanks for the hint, now it's creating more output:

************* Path validation summary **************
Response                         Time (ms)     Location
Deferred                                       srv*
Symbol search path is: srv*
Executable search path is: 
ModLoad: 00007ff6`90ba0000 00007ff6`90c00000   F:\cutexg music\QXGMusic_win10.exe
ModLoad: 00007fff`00f10000 00007fff`01105000   C:\WINDOWS\SYSTEM32\ntdll.dll
ModLoad: 00007ffe`ff8c0000 00007ffe`ff97d000   C:\WINDOWS\System32\KERNEL32.DLL
ModLoad: 00007ffe`fe650000 00007ffe`fe917000   C:\WINDOWS\System32\KERNELBASE.dll
ModLoad: 00007fff`00da0000 00007fff`00ec9000   C:\WINDOWS\System32\ole32.dll
ModLoad: 00007ffe`fea90000 00007ffe`feb90000   C:\WINDOWS\System32\ucrtbase.dll
ModLoad: 00007fff`00c10000 00007fff`00d34000   C:\WINDOWS\System32\RPCRT4.dll
ModLoad: 00007ffe`ffb30000 00007ffe`ffe85000   C:\WINDOWS\System32\combase.dll
ModLoad: 00007fff`00a70000 00007fff`00a9a000   C:\WINDOWS\System32\GDI32.dll
ModLoad: 00007ffe`fef40000 00007ffe`fef62000   C:\WINDOWS\System32\win32u.dll
ModLoad: 00007ffe`fe980000 00007ffe`fea89000   C:\WINDOWS\System32\gdi32full.dll
ModLoad: 00007ffe`febe0000 00007ffe`fec7d000   C:\WINDOWS\System32\msvcp_win.dll
ModLoad: 00007ffe`ff980000 00007ffe`ffb20000   C:\WINDOWS\System32\USER32.dll
ModLoad: 00007ffe`c84a0000 00007ffe`c8b76000   F:\cutexg music\Qt5Gui.dll
ModLoad: 00007ffe`ce4d0000 00007ffe`cea17000   F:\cutexg music\Qt5Widgets.dll
ModLoad: 00007ffe`ef2a0000 00007ffe`ef331000   C:\WINDOWS\SYSTEM32\MSVCP140.dll
ModLoad: 00007ffe`c7ed0000 00007ffe`c8493000   F:\cutexg music\Qt5Core.dll
ModLoad: 00007ffe`c9750000 00007ffe`c985a000   C:\WINDOWS\SYSTEM32\MFReadWrite.dll
ModLoad: 00007fff`00710000 00007fff`007ae000   C:\WINDOWS\System32\msvcrt.dll
ModLoad: 00007ffe`fffc0000 00007fff`00701000   C:\WINDOWS\System32\SHELL32.dll
ModLoad: 00007ffe`d1a10000 00007ffe`d1bcb000   C:\WINDOWS\SYSTEM32\MFPlat.DLL
ModLoad: 00007ffe`efb40000 00007ffe`efb59000   C:\WINDOWS\SYSTEM32\VCRUNTIME140.dll
ModLoad: 00007ffe`fef70000 00007ffe`ff00b000   C:\WINDOWS\System32\sechost.dll
ModLoad: 00007ffe`ce380000 00007ffe`ce4cf000   F:\cutexg music\Qt5Network.dll
ModLoad: 00007ffe`fff50000 00007ffe`fffbb000   C:\WINDOWS\System32\WS2_32.dll
ModLoad: 00007ffe`efb30000 00007ffe`efb3c000   C:\WINDOWS\SYSTEM32\VCRUNTIME140_1.dll
ModLoad: 00007ffe`ff6f0000 00007ffe`ff79a000   C:\WINDOWS\System32\ADVAPI32.dll
ModLoad: 00007ffe`fa730000 00007ffe`fa993000   C:\WINDOWS\SYSTEM32\d3d11.dll
ModLoad: 00007ffe`fed60000 00007ffe`feebd000   C:\WINDOWS\System32\CRYPT32.dll
ModLoad: 00007ffe`fcf90000 00007ffe`fd083000   C:\WINDOWS\SYSTEM32\dxgi.dll
ModLoad: 00007ffe`fc0d0000 00007ffe`fc16f000   C:\WINDOWS\SYSTEM32\UxTheme.dll
ModLoad: 00007ffe`feb90000 00007ffe`febdd000   C:\WINDOWS\System32\cfgmgr32.dll
ModLoad: 00007ffe`faae0000 00007ffe`faae9000   C:\WINDOWS\SYSTEM32\MSVCP140_1.dll
ModLoad: 00007ffe`fc2c0000 00007ffe`fc2ef000   C:\WINDOWS\SYSTEM32\dwmapi.dll
ModLoad: 00007ffe`e4040000 00007ffe`e405d000   C:\WINDOWS\SYSTEM32\MPR.dll
ModLoad: 00007ffe`fe540000 00007ffe`fe56e000   C:\WINDOWS\SYSTEM32\USERENV.dll
ModLoad: 00007ffe`f90e0000 00007ffe`f90ea000   C:\WINDOWS\SYSTEM32\VERSION.dll
ModLoad: 00007ffe`f02e0000 00007ffe`f02f8000   C:\WINDOWS\SYSTEM32\NETAPI32.dll
ModLoad: 00007ffe`ffea0000 00007ffe`fff4e000   C:\WINDOWS\System32\shcore.dll
ModLoad: 00007ffe`fdae0000 00007ffe`fdb1b000   C:\WINDOWS\SYSTEM32\IPHLPAPI.DLL
ModLoad: 00007ffe`fdb20000 00007ffe`fdbeb000   C:\WINDOWS\SYSTEM32\DNSAPI.dll
ModLoad: 00007ffe`f2c10000 00007ffe`f2c37000   C:\WINDOWS\SYSTEM32\WINMM.dll
ModLoad: 00007ffe`fdbf0000 00007ffe`fdbfc000   C:\WINDOWS\SYSTEM32\NETUTILS.DLL
ModLoad: 00007ffe`eae10000 00007ffe`eae38000   C:\WINDOWS\SYSTEM32\SRVCLI.DLL
ModLoad: 00007ffe`fe030000 00007ffe`fe03c000   C:\WINDOWS\SYSTEM32\CRYPTBASE.DLL
ModLoad: 00007fff`00b00000 00007fff`00b30000   C:\WINDOWS\System32\IMM32.DLL
ModLoad: 00007ffe`ffe90000 00007ffe`ffe99000   C:\WINDOWS\System32\NSI.dll
ModLoad: 00007ffe`fc5b0000 00007ffe`fc5c3000   C:\WINDOWS\SYSTEM32\kernel.appcore.dll
ModLoad: 00007ffe`feec0000 00007ffe`fef3f000   C:\WINDOWS\System32\bcryptPrimitives.dll
ModLoad: 00007ffe`d19a0000 00007ffe`d19d0000   C:\WINDOWS\SYSTEM32\RTWorkQ.DLL
ModLoad: 00007ffe`fc7b0000 00007ffe`fcf43000   C:\WINDOWS\SYSTEM32\windows.storage.dll
ModLoad: 00007ffe`fe0c0000 00007ffe`fe0ec000   C:\WINDOWS\SYSTEM32\Wldp.dll
ModLoad: 00007fff`00aa0000 00007fff`00af5000   C:\WINDOWS\System32\shlwapi.dll
ModLoad: 00007ffe`fe580000 00007ffe`fe5a6000   C:\WINDOWS\SYSTEM32\profapi.dll
ModLoad: 00007ffe`c7d50000 00007ffe`c7ec5000   F:\cutexg music\platforms\qwindows.dll
ModLoad: 00007fff`00b40000 00007fff`00c0d000   C:\WINDOWS\System32\OLEAUT32.dll
ModLoad: 00007ffe`fa280000 00007ffe`fa294000   C:\WINDOWS\SYSTEM32\WTSAPI32.dll
ModLoad: 00007ffe`fdc50000 00007ffe`fdc9b000   C:\WINDOWS\SYSTEM32\powrprof.dll
ModLoad: 00007ffe`fdac0000 00007ffe`fdad2000   C:\WINDOWS\SYSTEM32\UMPDC.dll
ModLoad: 00007ffe`de3e0000 00007ffe`de406000   F:\cutexg music\styles\qwindowsvistastyle.dll
ModLoad: 00007ffe`dbe50000 00007ffe`dc0ce000   C:\WINDOWS\system32\dwrite.dll
ModLoad: 00007ffe`f8930000 00007ffe`f8947000   C:\WINDOWS\SYSTEM32\dhcpcsvc6.DLL
ModLoad: 00007ffe`f8910000 00007ffe`f892d000   C:\WINDOWS\SYSTEM32\dhcpcsvc.DLL
ModLoad: 00007ffe`f61f0000 00007ffe`f63bd000   C:\WINDOWS\system32\d3d9.dll
ModLoad: 00007ffe`d8ba0000 00007ffe`d8c3e000   C:\WINDOWS\SYSTEM32\xaudio2_9.dll
ModLoad: 00007ffe`f90f0000 00007ffe`f9175000   C:\WINDOWS\SYSTEM32\MMDevAPI.DLL
ModLoad: 00007ffe`f8ea0000 00007ffe`f8eaa000   C:\WINDOWS\SYSTEM32\AVRT.dll
ModLoad: 00007ffe`fe400000 00007ffe`fe42c000   C:\WINDOWS\SYSTEM32\DEVOBJ.dll
ModLoad: 00007fff`007b0000 00007fff`00858000   C:\WINDOWS\System32\clbcatq.dll
ModLoad: 00007ffe`f8eb0000 00007ffe`f8ee1000   C:\WINDOWS\SYSTEM32\cryptnet.dll
ModLoad: 00007ffe`fe920000 00007ffe`fe980000   C:\WINDOWS\System32\WINTRUST.DLL
ModLoad: 00007ffe`fe240000 00007ffe`fe252000   C:\WINDOWS\SYSTEM32\MSASN1.dll
ModLoad: 00007ffe`ff510000 00007ffe`ff52d000   C:\WINDOWS\System32\imagehlp.dll
ModLoad: 00007ffe`f9280000 00007ffe`f9400000   C:\WINDOWS\SYSTEM32\AUDIOSES.DLL
ModLoad: 00007ffe`fc1d0000 00007ffe`fc1e4000   C:\WINDOWS\SYSTEM32\resourcepolicyclient.dll
ModLoad: 00007ffe`fe010000 00007ffe`fe028000   C:\WINDOWS\SYSTEM32\CRYPTSP.dll
ModLoad: 00007ffe`fd760000 00007ffe`fd794000   C:\WINDOWS\system32\rsaenh.dll
ModLoad: 00007ffe`fed30000 00007ffe`fed57000   C:\WINDOWS\System32\bcrypt.dll
ModLoad: 00007ffe`ff7a0000 00007ffe`ff8b5000   C:\WINDOWS\System32\MSCTF.dll
ModLoad: 00007ffe`dcae0000 00007ffe`dcb1e000   C:\WINDOWS\system32\dataexchange.dll
ModLoad: 00007ffe`fb340000 00007ffe`fb525000   C:\WINDOWS\system32\dcomp.dll
ModLoad: 00007ffe`f8050000 00007ffe`f8257000   C:\WINDOWS\system32\twinapi.appcore.dll
ModLoad: 00007ffe`edc10000 00007ffe`edd0d000   C:\WINDOWS\SYSTEM32\textinputframework.dll
ModLoad: 00007ffe`fb8b0000 00007ffe`fbc0a000   C:\WINDOWS\System32\CoreUIComponents.dll
ModLoad: 00007ffe`fbc10000 00007ffe`fbd02000   C:\WINDOWS\System32\CoreMessaging.dll
ModLoad: 00007ffe`fd380000 00007ffe`fd3b3000   C:\WINDOWS\SYSTEM32\ntmarta.dll
ModLoad: 00007ffe`fb1e0000 00007ffe`fb336000   C:\WINDOWS\SYSTEM32\wintypes.dll
ModLoad: 00007ffe`e7ab0000 00007ffe`e7b16000   C:\WINDOWS\system32\Oleacc.dll
ModLoad: 00007ffe`d5840000 00007ffe`d5b34000   C:\WINDOWS\system32\UIAutomationCore.dll
ModLoad: 00007ffe`f9fd0000 00007ffe`fa0c7000   C:\WINDOWS\SYSTEM32\PROPSYS.dll
ModLoad: 00007ffe`fe450000 00007ffe`fe4f2000   C:\WINDOWS\SYSTEM32\sxs.dll
(3558.275c): Break instruction exception - code 80000003 (first chance)
ntdll!DbgBreakPoint:
00007fff`00faf8b0 cc              int     3

Seems the platforms and styles plugins are loaded, but still no imageformats.

Christian Ehrlicher

We need the debug output from the system where the plugins are not loaded.

closer_ex

@Christian-Ehrlicher

The following lines are missing:

ModLoad: 00007ffe`eef80000 00007ffe`eef8d000   F:\Qt\5.15.0\msvc2019_64\plugins\imageformats\qgif.dll
ModLoad: 00007ffe`e3130000 00007ffe`e313f000   F:\Qt\5.15.0\msvc2019_64\plugins\imageformats\qicns.dll
ModLoad: 00007ffe`de440000 00007ffe`de44d000   F:\Qt\5.15.0\msvc2019_64\plugins\imageformats\qico.dll
ModLoad: 00007ffe`d8bd0000 00007ffe`d8c3a000   F:\Qt\5.15.0\msvc2019_64\plugins\imageformats\qjpeg.dll
ModLoad: 00007ffe`de430000 00007ffe`de43c000   F:\Qt\5.15.0\msvc2019_64\plugins\imageformats\qsvg.dll
ModLoad: 00007ffe`de3b0000 00007ffe`de404000   F:\Qt\5.15.0\msvc2019_64\bin\Qt5Svg.dll
ModLoad: 00007ffe`de370000 00007ffe`de37c000   F:\Qt\5.15.0\msvc2019_64\plugins\imageformats\qtga.dll
ModLoad: 00007ffe`cf660000 00007ffe`cf6c3000   F:\Qt\5.15.0\msvc2019_64\plugins\imageformats\qtiff.dll
ModLoad: 00007ffe`d8bc0000 00007ffe`d8bcb000   F:\Qt\5.15.0\msvc2019_64\plugins\imageformats\qwbmp.dll
ModLoad: 00007ffe`cf5d0000 00007ffe`cf653000   F:\Qt\5.15.0\msvc2019_64\plugins\imageformats\qwebp.dll

Right before qwindows.dll.
I compared 2 outputs, other lines are the same except some loading sequence. No clue why Qt5Svg is not loaded though...

Christian Ehrlicher

Again: please find a way to catch the debug outputs (e.g. with qInstallMessageHandler) so we can see what QT_DEBUG_PLUGINS prints out!

closer_ex

@Christian-Ehrlicher
The message handler somehow started to log plugins debug info.

Debug: QFactoryLoader::QFactoryLoader() checking directory path "F:/cutexg music/platforms" ...
Debug: QFactoryLoader::QFactoryLoader() looking at "F:/cutexg music/platforms/qminimal.dll"
Warning: Found metadata in lib F:/cutexg music/platforms/qminimal.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "archreq": 0,
    "className": "QMinimalIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Debug: Got keys from plugin meta data ("minimal")
Debug: QFactoryLoader::QFactoryLoader() looking at "F:/cutexg music/platforms/qwindows.dll"
Warning: Found metadata in lib F:/cutexg music/platforms/qwindows.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "windows"
        ]
    },
    "archreq": 0,
    "className": "QWindowsIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Debug: Got keys from plugin meta data ("windows")
Debug: loaded library "F:/cutexg music/platforms/qwindows.dll"
Debug: QFactoryLoader::QFactoryLoader() checking directory path "F:/cutexg music/platformthemes" ...
Debug: QFactoryLoader::QFactoryLoader() checking directory path "F:/cutexg music/styles" ...
Debug: QFactoryLoader::QFactoryLoader() looking at "F:/cutexg music/styles/qwindowsvistastyle.dll"
Warning: Found metadata in lib F:/cutexg music/styles/qwindowsvistastyle.dll, metadata=
{
    "IID": "org.qt-project.Qt.QStyleFactoryInterface",
    "MetaData": {
        "Keys": [
            "windowsvista"
        ]
    },
    "archreq": 0,
    "className": "QWindowsVistaStylePlugin",
    "debug": false,
    "version": 331520
}


Debug: Got keys from plugin meta data ("windowsvista")
Debug: loaded library "F:/cutexg music/styles/qwindowsvistastyle.dll"
Debug: QFactoryLoader::QFactoryLoader() checking directory path "F:/cutexg music/accessible" ...
Debug: QFactoryLoader::QFactoryLoader() checking directory path "F:/cutexg music/accessiblebridge" ...

Indicating it's not even looking for the imageformats.

Christian Ehrlicher

Please take a look at QCoreApplication::libraryPaths(), it's the source where Qt iterates over: QFactoryLoader::update()

closer_ex

@Christian-Ehrlicher

...
QApplication a(argc, argv);
qDebug() << QCoreApplication::libraryPaths() << Qt::endl;
...

Lists only the root folder, "F:/cutexg music".

Then I tried to add an absolute path directing to MSVC plugins folder by QApplication::addLibraryPath("F:\\Qt\\5.15.0\\msvc2019_64\\plugins");

It lists both paths and pictures are shown. Plugins debug info also indicates the plugins from MSVC folder are loaded.

Christian Ehrlicher

Ok, this does not help, did not read carefully enough.
Please check the output of QImageReader::supportedImageFormats(). Did you maybe compile Qt by your own and disabled the image format plugins (QT_NO_IMAGEFORMATPLUGIN)?

/edit: im referring to https://code.woboq.org/qt5/qtbase/src/gui/image/qimagereaderwriterhelpers.cpp.html#_ZN25QImageReaderWriterHelpers21supportedImageFormatsENS_10CapabilityE - as you can see calling supportedImageFormats() should trigger the QFactoryLoader for imageformats should be called.

closer_ex

@Christian-Ehrlicher

Did you maybe compile Qt by your own and disabled the image format plugins (QT_NO_IMAGEFORMATPLUGIN)?

I install Qt by maintenance tool online, so this is unlikely to happen.

/edit: im referring to https://code.woboq.org/qt5/qtbase/src/gui/image/qimagereaderwriterhelpers.cpp.html#_ZN25QImageReaderWriterHelpers21supportedImageFormatsENS_10CapabilityE - as you can see calling supportedImageFormats() should trigger the QFactoryLoader for imageformats should be called.

This is absolutely weird, so I commented QApplication::addLibraryPath("F:\\Qt\\5.15.0\\msvc2019_64\\plugins"); out, added include <QImageReader> and QImageReader::supportedImageFormats() in main, deployed program showed jpeg again, even after I comment all these added lines then clean&rebuild the project. The library path output is still the same, but now it looks for and loads image plugins.

Now I'm really curious about what's going on, is this related to the shadow build or what?

Christian Ehrlicher

Ok,what Qt version do you use and can you maybe provide a simple reproducer? I mean something like

int main(...)
{
  QApplication app(argc, argv);
  QImage img("my.jpeg");
  qDebug() << "Is loaded:" << !img.isNull();
}

So we can check if this small program has the same issues.

closer_ex

@Christian-Ehrlicher

Ok,what Qt version do you use and can you maybe provide a simple reproducer?

I'm using Qt 5.15.0 with Qt Creator 4.13.1, compiler version is MSVC 2019 (16.7.30517.126 amd64).

I'll try to write a minimum example, but it may take some time to reproduce the situation. Thanks very much for your effort and patience!

dp69

Hello from 2024, I believe I had the same issue loading JPEG plugin, while other (GIF ICO) loaded correctly.

It is insufficient to have "imageformats" with the "qjpeg(d).dll" in it. You also need to have "jpeg62.dll" in your application folder, i.e. next to other basic "Qt6*.dll". The missing "jpeg62.dll" corresponds to JPEG image codec (https://libjpeg-turbo.org/) that Qt JPEG plugin depends on.

I hope that helps.