QPixmap load fails on WinXP SP3?

goetz

The plug ins are loaded from either the Qt installation dir or from the plugins folder near the application executable. So your app runs fine on the development machine because the plug ins are found in the Qt dir.

windyweather

Woops...
This does not work.
I installed the program on a Vista x64 system where Qt has not been installed and it fails.
The plugins are as you suggest. But no dice.

Based on this page: http://doc.qt.nokia.com/latest/plugins-howto.html
It looks like I can statically link against the plugins, so I'm going to try that next.

windy

goetz

For my projects it is sufficient to include this into the InnoSetup script:

@
#define QtDir "C:\Qt\4.7.0"

Source: {#QtDir}\bin\QtCore4.dll; DestDir: {app}; Flags: ignoreversion
Source: {#QtDir}\bin\QtGui4.dll; DestDir: {app}; Flags: ignoreversion

Source: {#QtDir}\plugins\iconengines\qsvgicon4.dll; DestDir: {app}\plugins\iconengines; Flags: ignoreversion

Source: {#QtDir}\plugins\imageformats\qgif4.dll; DestDir: {app}\plugins\imageformats; Flags: ignoreversion
Source: {#QtDir}\plugins\imageformats\qico4.dll; DestDir: {app}\plugins\imageformats; Flags: ignoreversion
Source: {#QtDir}\plugins\imageformats\qjpeg4.dll; DestDir: {app}\plugins\imageformats; Flags: ignoreversion
Source: {#QtDir}\plugins\imageformats\qmng4.dll; DestDir: {app}\plugins\imageformats; Flags: ignoreversion
Source: {#QtDir}\plugins\imageformats\qsvg4.dll; DestDir: {app}\plugins\imageformats; Flags: ignoreversion
Source: {#QtDir}\plugins\imageformats\qtiff4.dll; DestDir: {app}\plugins\imageformats; Flags: ignoreversion
@

Does the program actually start on the other windows box? If not you should check if the C++ runtimes are installed there.

Zlatomir

Make sure the installer copy the dll's in proper folder settings, because your project works for me (on Xp without Qt)
take a look here: !http://i.imgur.com/wjgXC.jpg(http://i.imgur.com/wjgXC.jpg)!
LE: Looks like the folder imageformats should be directly in the same folder as the application, not in the plugins folder.

windyweather

Maybe. Or you can qApp.addLibraryPath( qApp.applicationDirPath + QString("/plugins") ); and put them in plugins/imageformats.

When I copied them manually to the app dir, it did not work under Vista x64. Not sure why.
But this method works under Vista x64. Now for a Win 7 x64 test.

Yep. Works fine on Win 7 x64 too.

windy

goetz

the plugins must be in a subdir plugins/imageformats - this is per default in the library search path, it should not be necessary to add it manually.

Zlatomir

@Volker: i though the same, but the default behavior seem to be imageformats folder direct in the same folder as application (it doesn't work if i put them in the plugins/imageformats) //see the print-screen above - that's on a brand-new installation of Xp, i just built an Xp machine to test my apps, no Qt installed yet ;)

windyweather

So I guess we agree that Nokia or TrollTech or whoever needs to update the docs to make this more clear. Seems that they have not covered all the bases re the Deployment of applications.
Thanks for your help,
windy

goetz

Oh yes, you're right Zlatomir. My fault, sorry. It is necessary to add the dir to the plugins path.

goetz

Windy, that's all explained in the "Deploying an Application on Windows":http://doc.trolltech.com/stable/deployment-windows.html page of the docs, there's a dedicated section regarding the "Qt plugins":http://doc.trolltech.com/latest/deployment-windows.html#qt-plugins at the end.

mohsen

have you tested your application with same compiled libraries in WindowsXP SP2? If you did, so it would be a Qt bug. You may report it.