te: Thu, 17 Apr 2003 11:25:26 -0700 From: "Jim" Subject: [SDL] Frame buffer patches... Would seem that GCC 3.2.2 promotes all signed values to unsigned if any single vlaue is unsigned in an expression... for instance when calculating an elo touch position....evertyhign is an (int) except for cach_vinfo.xres which is unsigned. THerefore if y ou reverse the SDL_ELO_MIN_X and SDL_ELO_MAX_X values the resulging negative value pegs the expression to it's max. Attached it the accumu lated patch to typecast the unsigned values to (int) - *dx = (cache_vinfo.xres - (cache_vinfo.xres * (input_x - ELO_MIN_X)) / width); + *dx = ((int)cache_vinfo.xres - ((int)cache_vinfo.xres * (input_x - ELO_MIN_X)) / width); and also to provide quite failure to operations which have the screen currently locked... The touch screen I'm using the original values were exactly opposite of any position I touched on the screen - evaluating the math the expr ession SHOULD have handled reversing the min and max values - and after casting the unsigned .xres and .yres to a signed int - worked well. .. Jim

The latest development version of SDL is available via CVS:

cvs -d :pserver:guest@libsdl.org:/home/sdlweb/libsdl.org/cvs login
# No password, so just hit enter when prompted for a password
cvs -d :pserver:guest@libsdl.org:/home/sdlweb/libsdl.org/cvs checkout SDL

When you check a fresh copy of SDL out of CVS, you need to generate
the files used by make by running the "autogen.sh" script, which will
run aclocal, automake, autoconf and then run configure.

There is a web interface to cvs at http://www.libsdl.org/cgi/cvsweb.cgi