Windows Embedded Compact 7 - Unable to import library Qt5Gui.dll

Erakis

Hi, I successfully build Qt for Windows Embedded Compact 7.

configure -platform win32-msvc2008 -xplatform wince70embedded-armv4i-msvc2008 -no-accessibility -opengl es2

Now I created a simple application using QML.
I copy my exe application to root folder of my device
Also the files from (qt5gui.dll, qt5qml.dll, qt5core.dll) took from the folder (..\qt-everywhere-opensource-src-5.4.1\qtbase\bin) but I'm getting the following error "Unable to import library Qt5Gui.dll !".

Did I miss something ?

Also, it is normal that I'm having this on QtCreator : Screen shot

Best regards

Erakis

Ok those files was missing :

\msvcr90.dll
\msvcr90d.dll)
\platforms\qwindows.dll
\platforms\qwindowsd.dll

Now widget application are well working. But while I start a QML application I got no error message but nothing appears.

I have the following file present too :

\windows\libegl.dll
\windows\libGLES_CM.dll
\windows\libGLESv1_CM.dll
\windows\libGLESv2.dll

Did I miss something else ?

SGaist

Hi,

You can find here a nice explanation of what you need to deploy an application on Windows. For the more gory details, you can take a look a the Qt's Windows Deployment chapter

Erakis

Hi SGaist,

First of all, thank your for your support. It really appreciated :)

I follow the instructions of the link you provide me but I'm not getting anything from executing my QML application demo. There nothing special in it, only a blue rectangle. While executing the exe file it returns immediately without any error.

Here is the structure of my deployment : Folder structure

I did tried using Dependency Walker to test agains all dependency but all seems to be good.

Here is the configuration of my build :

I modify the SDK name in the qmake.conf :

CE_SDK                  = BBBWinCE7_SDK

The configuration line :

configure -platform win32-msvc2008 -xplatform wince70embedded-armv4i-msvc2008 -no-accessibility -opengl es2

Run nmake and the the compilation succeed. I was not aware at this time that we can use shadow building to get a deploy folder... but for now this is not important.

And the proof of the SDK installation : SDK Folder

The last idea I had was to start debugging using Visual Studio. So I Install the Visual Studio Add-in from there qt-vs-addin-1.2.4. Once I open Visual Studio :
1 - I click on the Qt5 menu
2 - I click on the Qt Options
3 - Button Add
4 - In the version name : BBBWinCE7_SDK
5 - In the path : H:\DevelopmentTests\qt-everywhere-opensource-src-5.4.1\qtbase
6 - Click on the OK button

Here is the error I'm getting : Error image

I'm very desperate and out of idea... Hope someone will propose me some other solutions.

Best regards,

Erakis

I finally succeed to get something displaying after launching the QML application :) My structure was not entirely correct.

Here is what I have now :

Deploy Folder\ :.
|   msvcr90.dll
|   Qt5Core.dll
|   Qt5Declarative.dll
|   Qt5Gui.dll
|   Qt5Network.dll
|   Qt5OpenGL.dll
|   Qt5Qml.dll
|   Qt5Quick.dll
|   Qt5QuickTest.dll
|   Qt5Script.dll
|   Qt5ScriptTools.dll
|   Qt5Sql.dll
|   Qt5Svg.dll
|   Qt5Test.dll
|   Qt5Widgets.dll
|   Qt5Xml.dll
|   Qt5XmlPatterns.dll
|   MyApplication.exe       // My Application
|   
+---imageformats
|       qdds.dll
|       qddsd.dll
|       qgif.dll
|       qgifd.dll
|       qicns.dll
|       qicnsd.dll
|       qico.dll
|       qicod.dll
|       qjpeg.dll
|       qjpegd.dll
|       qmng.dll
|       qmngd.dll
|       qsvg.dll
|       qsvgd.dll
|       qtga.dll
|       qtgad.dll
|       qtiff.dll
|       qtiffd.dll
|       qwbmp.dll
|       qwbmpd.dll
|       qwebp.dll
|       qwebpd.dll
|       
+---platforms
|       msvcr90.dll
|       qminimal.dll
|       qoffscreen.dll
|       qwindows.dll
|       
+---qml
|   \---MyApplication           // Nothing here as I have a qrc file, so all is embedded in exe ?
+---Qt
|   +---labs
|   |   +---folderlistmodel
|   |   |       plugins.qmltypes
|   |   |       qmldir
|   |   |       qmlfolderlistmodelplugin.dll
|   |   |       qmlfolderlistmodelplugind.dll
|   |   |       
|   |   \---settings
|   |           plugins.qmltypes
|   |           qmldir
|   |           qmlsettingsplugin.dll
|   |           qmlsettingsplugind.dll
|   |           
|   \---WebSockets
|           declarative_qmlwebsockets.dll
|           declarative_qmlwebsocketsd.dll
|           plugins.qmltypes
|           qmldir
|           
+---QtBluetooth
|       declarative_bluetooth.dll
|       declarative_bluetoothd.dll
|       plugins.qmltypes
|       qmldir
|       
+---QtGraphicalEffects
|   |   Blend.qml
|   |   BrightnessContrast.qml
|   |   Colorize.qml
|   |   ColorOverlay.qml
|   |   ConicalGradient.qml
|   |   Desaturate.qml
|   |   DirectionalBlur.qml
|   |   Displace.qml
|   |   DropShadow.qml
|   |   FastBlur.qml
|   |   GammaAdjust.qml
|   |   GaussianBlur.qml
|   |   Glow.qml
|   |   HueSaturation.qml
|   |   InnerShadow.qml
|   |   LevelAdjust.qml
|   |   LinearGradient.qml
|   |   MaskedBlur.qml
|   |   OpacityMask.qml
|   |   qmldir
|   |   RadialBlur.qml
|   |   RadialGradient.qml
|   |   RectangularGlow.qml
|   |   RecursiveBlur.qml
|   |   ThresholdMask.qml
|   |   ZoomBlur.qml
|   |   
|   \---private
|           FastGlow.qml
|           FastInnerShadow.qml
|           FastMaskedBlur.qml
|           GaussianDirectionalBlur.qml
|           GaussianGlow.qml
|           GaussianInnerShadow.qml
|           GaussianMaskedBlur.qml
|           SourceProxy.qml
|           
+---QtLocation
|       declarative_location.dll
|       declarative_locationd.dll
|       plugins.qmltypes
|       qmldir
|       
+---QtMultimedia
|       declarative_multimedia.dll
|       declarative_multimediad.dll
|       plugins.qmltypes
|       qmldir
|       Video.qml
|       
+---QtNfc
|       declarative_nfc.dll
|       declarative_nfcd.dll
|       plugins.qmltypes
|       qmldir
|       
+---QtPositioning
|       declarative_positioning.dll
|       declarative_positioningd.dll
|       plugins.qmltypes
|       qmldir
|       
+---QtQml
|   +---Models.2
|   |       modelsplugin.dll
|   |       modelsplugind.dll
|   |       qmldir
|   |       
|   \---StateMachine
|           plugins.qmltypes
|           qmldir
|           qtqmlstatemachine.dll
|           qtqmlstatemachined.dll
|           
+---QtQuick
|   +---LocalStorage
|   |       plugins.qmltypes
|   |       qmldir
|   |       qmllocalstorageplugin.dll
|   |       qmllocalstorageplugind.dll
|   |       
|   +---Particles.2
|   |       particlesplugin.dll
|   |       particlesplugind.dll
|   |       plugins.qmltypes
|   |       qmldir
|   |       
|   +---Window.2
|   |       plugins.qmltypes
|   |       qmldir
|   |       windowplugin.dll
|   |       windowplugind.dll
|   |       
|   \---XmlListModel
|           plugins.qmltypes
|           qmldir
|           qmlxmllistmodelplugin.dll
|           qmlxmllistmodelplugind.dll
|           
+---QtQuick.2
|       plugins.qmltypes
|       qmldir
|       qtquick2plugin.dll
|       qtquick2plugind.dll
|       
+---QtSensors
|       declarative_sensors.dll
|       declarative_sensorsd.dll
|       plugins.qmltypes
|       qmldir
|       
+---QtTest
|       plugins.qmltypes
|       qmldir
|       qmltestplugin.dll
|       qmltestplugind.dll
|       SignalSpy.qml
|       TestCase.qml
|       testlogger.js
|       
\---QtWebChannel
        declarative_webchannel.dll
        declarative_webchanneld.dll
        plugins.qmltypes
        qmldir

But I still have a problem, I'm using svg image in my qrc file and display it using an image element (source : "qrc:/img..."). On Windows Desktop there no problem the image are display but on Windows Embedded Compact 7 they are not display. More, to allow application to start I have to rename the folder imageformats else the application do nothing. While the imageformats folder is here the application start but I have no images. What could be the problem ? A missing pluging ?

About the Visual Studio setup problem versus the SDK I did not found any solution yet, this is VERY, VERY annoying !

Best regards,

SGaist

Do you have the svg plugin on WEC7 ?

Erakis

How to know?

If the dll "/imagesformats/qsvg.dll" is here and the "qtsvg.dll" is also at the root of the project, is that correct ?

SGaist

That part looks good

Erakis

list itemI create a QtQuick2 empty exemple.
Copy the executable on the SDCard deploy folder, \DeployFolder
I copy the folder \qml to *\DeployFolder*
I copy the folder \plugins to *\DeployFolder*
I copy ALL the DLL of \bin to *\DeployFolder*
I copy the file msvcr90.dll to *\DeployFolder*

Still no result, the application is hanging while starting, no output. What could be missing ? I've put ALL what exists from the build directory of QT ! This is very annoying :(

The SVG seems to be buggy on Windows CE or there something that I don't understand yet.

Somebody has another idea ?

SGaist

Then let's get back to the basics, can you run a simple hello world ?

Erakis

Yes without any problem.

I can also run application based Widget.

I can also run QtQuick2 application if I don't include the /imageformats folder. But this way I cannot use any svg images or any other image that need plugin inside of this folder. As long as I include the /imageformats folder, the application start but I have no display.

SGaist

Ok, then do you have the problem only with the svg plugin or any of the other ?

Erakis

Here is what I have tried :

I create an empty QtQuick2 project and copy it to my deploy. The deploy folder is having ALL QT plugins, dll, etc...
- Copy the executable on the SDCard deploy folder, \DeployFolder
- I copy the folder \qml to \DeployFolder
- I copy the folder \plugins to \DeployFolder
- I copy ALL the DLL of \bin to \DeployFolder
- I copy the file msvcr90.dll to \DeployFolder

I launch the executable and then it start properly and I have a window with graphical output.

Secondly I add this to application :

<RCC>
    <qresource prefix="/">
        <file>main.qml</file>
        <file>MainForm.ui.qml</file>
        <file>CMYK.jpg</file>
    </qresource>
</RCC>

Window {
    visible: true
    MainForm {
        anchors.fill: parent
        Image {
            source: "qrc:/CMYK.jpg"
            width : 80;  height : 80;
        }
    }
}

It start properly with graphical output.

Now I remove the jpg image and replace it by one of my SVG file. Surprise, it works also !!!

Now I tried to add 5 more SVG images to my resource file and create 5 more images element to my qml, but this time it failed ! Same problem as my original application. Now we can deduce that this is the number of images that makes the application crash or is it a particular image QT dislikes. To be sure I have tried with some of the svg images that I found in **src\qtsvg\examples\svg**, some works, other not.

After doing some test, I conclude that some svg image are crashing application and other simply work. This is weird, those image a very tiny icon not complex. And why they are ALL working on Windows Desktop but not on Windows CE ? Is there any limitation or know issue on Windows CE about SVG images ? I hope someone here can confirm this and provide a fix if possible.

As example, those one are not working on Windows CE:

Image { source: "qrc:/bubbles.svg"; sourceSize.width: 60; sourceSize.height: 60; width : 60; height : 60}
Image { source: "qrc:/volume-up.svg"; sourceSize.width: 60; sourceSize.height: 60; width : 60; height : 60}
Image { source: "qrc:/spinner.svg"; sourceSize.width: 60; sourceSize.height: 60; width : 60; height : 60}

SGaist

Can you check whether they use the same SVG standard ?

Erakis

This the ones that are coming with QT example... they should work.

SGaist

At least bubbles.svg is animated, so I wonder if it has something to do with it