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- This program is designed to be run from the command line
(to facilitate batch processing), and therefore does not use
calls to the windowing system. If you want to use some of the
neat image-processing capabilities offered by QT under a
windowing system, define X_CLIENT during compilation. Then you
can create a QPixmap widget (which requires creation of a
QApplication widget, which requires a windowing system at
run-time) and then can write code to replace the pixel-by-pixel
copy in the "Delete region" code and to replace the
label-writing code that relies on the gd library. I don't know
whether these changes would save a lot of execution time, and
besides CPU cycles are cheap these days.
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