QImage() returns Null Image

[wysota]

ah..but why is it that if i replace QtGui4/QtGuid4 .dll's of version 4.7.0 with 4.8.1 in the repository, then it works without any problem. There is no plugin in the cvs online repository.

If you can load jpegs then either you have the plugin or you built the plugin functionality into the library when building the library by passing an appropriate switch to configure.exe.

Secondly when i asked the project owner to allow 4.8.1 dll's he's concerned that it could cause breakage of existing codes that use the 3rd party libraries. Do you know of any functionality of 4.7.0 which has been made obsolete in 4.8.1? (deprecated ones dont cause a problem i think..just that their use is discouraged)

The problem is not about functionality becoming obsolete as code is not removed from Qt libs. However some code might break because of using some flaw or undocumented feature in 4.7.0 that might have been fixed in some later version of the library. The best solution is to ask the maintainer to provide image plugins for 4.7.0 or to provide a version of Qt libs with image loading code embedded into the library itself.

[ustulation]

thanks! i'll do that.