[solved] Qt conflict with SDL on libpng?
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Since both Qt and SDL are cross-platform. I'm trying to use QT to browse files, and SDL to play the video file.
Qt load png resource correctly, but SDL_image always fail with "Decompression error" on IMG_Load().Source main.cpp within Qt project
@
// include QApplication and SDL_image here
...
int main(int argc, char* argv[]) {
SDL_Init(SDL_INIT_VIDEO);
IMG_Init(IMG_INIT_PNG);
SDL_Surface* img = IMG_Load("test.png");
if (img) {
SDL_FreeSurface(img);
printf("Success\n");
}else
printf("Failed\n");
IMG_Quit();
SDL_Quit();QApplication app("My App", argc, argv);
// show main window here
...
return app.exec();
}
@Output result
@
libpng error: Decompression error
Failed
@But if I use SDL_image outside the Qt project, IMG_Load() works properly.
Source main.cpp without Qt
@
// include SDL_image here
...
int main(int argc, char* argv[]) {
SDL_Init(SDL_INIT_VIDEO);
IMG_Init(IMG_INIT_PNG);
SDL_Surface* img = IMG_Load("test.png");
if (img) {
SDL_FreeSurface(img);
printf("Success\n");
}else
printf("Failed\n");
IMG_Quit();
SDL_Quit();return 0;
}
@Output result
@
SuccessSoftware List:
OS: Ubuntu 10.10
Qt: Qt-4.6.2 opensource version
SDL: libSDL-1.2.so.0.11.3
libpng: libpng 1.2.44
@It seems that Qt has built-in libpng, and load libpng at start-up, so SDL cannot load the correct version of libpng within Qt project.
Any suggestions on how to avoid this?Thanks,
DocW(edit: adjusted layout / mariusg)
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What platform is this?
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Doh, I missed that.
So I am guessing that you built Qt yourself (since Ubuntu Maverick ships with Qt 4.7.0)? If so, could you post the contents of mkspecs/qconfig.pri?
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<plug type="shameless">You might take a look at "this wiki page":http://developer.qt.nokia.com/wiki/BuildQtForLinux - it is IMNSHO a good overview of the options to "configure".</plug>
EDIT: fixed the link.