Different behavior of QPaint Print Text in different machines.

julio jerez

The is my Main GlPaint function
@void DemoEntityManager::paintEvent(QPaintEvent* ev)
{
newtonDemos* const mainWindow = (newtonDemos*) parent();

makeCurrent();

// do all 2d drawing
glShadeModel(GL_FLAT);
glDisable(GL_CULL_FACE);
glDisable(GL_DEPTH_TEST);
glDisable(GL_LIGHTING);

QPainter painter(this);
painter.setPen(Qt::white);

//This is correct on all OS
Print (painter, 14, 14, "FPS: %6.2f", fps);

// This is correct on Widnows 7, Linux and Mac but wrong on Windows64 (what is wrong?)
Print (painter, 14, 30, "Physics time (ms): %6.3f", m_physicsTime * 1000.0f);

painter.end();
}@

and this is the Print function
@void DemoEntityManager::Print (QPainter& painter, int x, int y, const char *fmt, ... ) const
{
va_list argptr;
char string[2048];

va_start (argptr, fmt);
vsprintf (string, fmt, argptr);
va_end( argptr );

painter.drawText(x, y, tr(string));
}@

This work fine on an Window 7, Linux and Mac
whoever when I test it on a win64 system the statics text is all over the place on the screen.

the funny thing is that If I only call Print once, the Text is printed correct,
Am I doing something incorrect?

edit:
cleanup code to bare mimum tha reproduces the Bug on win64

? Offline

hi julio, please also remove unnecessary code or commented out code from above code snip. easier for other readers to look at your code

julio jerez

Ok I edited to the bare minumum that can reproduce the Bug.
Sorry about that.

EDIT: Also fixed spellings