How to deploy when using Resource System? (Windows 10)

Ijon_Tichi · 24 Mar 2020, 06:03

windeployqt Output:

D:\QT-Creator-Projekte\build-JACK-Tool-Desktop_Qt_5_14_0_MinGW_64_bit-Release>windeployqt --release JACK-Tool.exe
D:\QT-Creator-Projekte\build-JACK-Tool-Desktop_Qt_5_14_0_MinGW_64_bit-Release\JACK-Tool.exe 64 bit, release executable
Direct dependencies: Qt5Core Qt5Gui Qt5Widgets
All dependencies : Qt5Core Qt5Gui Qt5Widgets
To be deployed : Qt5Core Qt5Gui Qt5Widgets
Unable to find the platform plugin.

the .pro file contains:

RESOURCES += \
jack-ressourcen.qrc

jsulm · wrote on 24 Mar 2020, 06:03

@Ijon_Tichi Usually resources are built into the executable, so it should work. See "Compiled-In Resources" in https://doc.qt.io/qt-5/resources.html
Can you show how you're using your resources?
Also, do you see any warnings when you start your app from cmd.exe?

Ijon_Tichi · wrote on 24 Mar 2020, 15:31

hello jsulm

i use a *.qrc (jack-ressourcen.qrc) over the Qt Creator
<RCC>
<qresource prefix="/images">
<file>ressourcen/jack-logo.jpg</file>
<file>ressourcen/Startbild.jpg</file>
<file>ressourcen/JACK-mittel.jpg</file>
<file>ressourcen/JACK-groß.jpg</file>
</qresource>
</RCC>

in the source code i use the ressources

...
QImage imageLogo(":/images/ressourcen/jack-logo.jpg","JPG");
...
ui->label_imageLogo->setPixmap(QPixmap::fromImage(imageLogo));
...

When i rum with Qt Creator (debug or relase) it works the imageLogo is displayed.

Whan i run from cmd.exe there ist no error, the program works, but the imageLogo is not shown.

A image, that i generate by QPainter thru the Program is shown, there no problem running from CMD :
...
QImage imageSchablone(2480, 3508, QImage::Format_RGB32);
...
// calculating the image
imageSchablone = aktSchablone.berechnen(aktuellerTonarm);
....
// show the image
// PixMapSchablone is a lable on the ui
ui->PixMapSchablone->setPixmap( QPixmap::fromImage(imageSchablone).scaledToHeight(900));
...

Ijon_Tichi · wrote on 24 Mar 2020, 16:42

I have testet with aditional images in the QRessource System.
The progam.exe get bigger, so i think the images are link into the program.

... but the the images are not shown when i rum from cmd.exe

Ijon_Tichi · 25 Mar 2020, 08:10

also show a image direct from file only work when run from Qt Creator (Debug or Release), wenn run from cmd.exe the image is not shown.
...
QImage imageStartSeite("D:\QT-Creator-Projekte\JACK-Tool\Startbild.jpg","JPG");
...

jsulm · wrote on 25 Mar 2020, 08:10

@Ijon_Tichi I think your problem is that you do not deploy your app properly before starting outside of QtCreator, so it can't find needed plug-in.
See https://doc.qt.io/qt-5/windows-deployment.html

Ijon_Tichi · 25 Mar 2020, 08:37

thanks jsulm,
yes, i readed this many time but i unterstand it not full, i am a beginner in Qt.
The windeployqt doesn't tell what plug-ins is needed.
Even when i copy all plug-ins folders into the working directory my jpg-files are not loaded.
Maybe there is a format problem to my jpg-files

I think, i have the needed plug-in to handle jpg, all I/O opterations (store, ..) with jpg that are calculated by the program works.

Wenn i use *.png images in the QRessource System it works fine, even from cmd.exe
So i have changed to the *.png format.

to me it is all fine, further i use png format

thanks jsulm to your help

Ijon

jsulm · wrote on 25 Mar 2020, 08:37

@Ijon_Tichi So, did you actually use windeployqt tool? It should copy the plug-in. Also, the plugins need to bi in a subdirectory as shown in the above link in an example:

The executable	plugandpaint.exe
The Basic Tools plugin	plugins\pnp_basictools.dll
The ExtraFilters plugin	plugins\pnp_extrafilters.dll
The Qt Windows platform plugin	platforms\qwindows.dll
The Qt Windows Vista style plugin	styles\qwindowsvistastyle.dll
The Qt Core module	Qt5Core.dll
The Qt GUI module	Qt5Gui.dll
The Qt Widgets module	Qt5Widgets.dll

Ijon_Tichi · wrote on 25 Mar 2020, 09:12

as i wrote in Post 1

i put

libgcc_s_seh-1.dll 
libstdc++-6.dll 
libwinpthread-1.dll
Qt5Core.dll 
Qt5Gui.dll 
Qt5Widgets.dll

and the plugin folders

imageformats
platforms
printsupport
styles

into the working directory.

but even when i copy all plug-in folders into the working directory there is the trouble with the jpg.

where can i find information, what plug-ins more than "imageformats" are needed to handle jpg?

as i wrote in post 2 i use the windeployqt tool, i have set the env (qtenv2.bat) bevor:

windeployqt Output:

D:\QT-Creator-Projekte\build-JACK-Tool-Desktop_Qt_5_14_0_MinGW_64_bit-Release>windeployqt --release JACK-Tool.exe
D:\QT-Creator-Projekte\build-JACK-Tool-Desktop_Qt_5_14_0_MinGW_64_bit-Release\JACK-Tool.exe 64 bit, release executable
Direct dependencies: Qt5Core Qt5Gui Qt5Widgets
All dependencies : Qt5Core Qt5Gui Qt5Widgets
To be deployed : Qt5Core Qt5Gui Qt5Widgets
Unable to find the platform plugin.

searching to the error message "Unable to find the platform plugin", i doesn't found a solution

I thing the ressource system work fine. By using png format it works fine.

Ijon_Tichi · wrote on 25 Mar 2020, 10:11

@Ijon_Tichi said in How to deploy when using Resource System? (Windows 10):

Unable to find the platform plugin.

To solve the problem with the windeployqt i downloaded the windeployqt64releaseonly.exe from here: http://tripleboot.org/Uploads/windeployqt64releaseonly.zip

Discussion here:
https://forum.qt.io/topic/109779/windeployqt-exe-comes-with-qt-5-14-not-copy-the-dlls-to-the-app-directory/8