LyX needs help: Broken font metrics computation
Michael Schmitt
michael.schmitt at teststep.org
Tue Jan 4 20:13:32 CET 2005
Dear Ralf, Christian, and all others,
as you have already noticed, the LyX team is working on a native Win32 port
of their text processor, using your GPL'd QT/Win32. Things have progressed
nicely in the last couple of weeks and Qt/Win32 seems to work quite well.
However, we have a serious problem with the computation of font metrics. I
have generated a small test case that illustrates the problem:
#include <qapplication.h>
int main(int argc, char **argv) {
QApplication app(argc, argv);
QFont f("times",18,QFont::Bold);
QFontMetrics fm(f);
QRect r = fm.boundingRect('x');
printf( "top: %d bottom: %d", r.top(), r.bottom());
return 0;
}
If you compile and run this program with GPL'd Qt/Win32, it outputs
top: 16 bottom:36
However, if you run exactly the same program with Qt/X11 on cygwin (or on
Linux), you get the following output:
top: -9 bottom: -1
Quite clear the numbers do not have to be identical but the fact that they
are once negative and once positive breaks our neck.
So... do you have any idea what is wrong?
Thanks in advance,
Michael
More information about the kde-cygwin
mailing list