Mercurial > sdl-ios-xcode
view src/main/Makefile.am @ 1259:36f24cdfcda7
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
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Tue, 24 Jan 2006 06:36:43 +0000 |
parents | 609c060fd2a2 |
children | 19418e4422cb |
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## Makefile.am for the main() function in the SDL library # # This is necessary because some platforms have special program # entry points, which require special application initialization. ARCH_SUBDIRS = $(srcdir)/beos \ $(srcdir)/epoc \ $(srcdir)/dummy \ $(srcdir)/macos \ $(srcdir)/macosx \ $(srcdir)/qtopia \ $(srcdir)/win32 # Build a separate library containing the main() entry point. lib_LIBRARIES = libSDLmain.a if TARGET_WIN32 MAINLIB_ARCH_SRCS = win32/SDL_win32_main.c else if TARGET_MACOSX if USE_COCOA MAINLIB_ARCH_SRCS = macosx/SDLMain.m macosx/SDLMain.h else if USE_CARBON MAINLIB_ARCH_SRCS = macos/SDL_main.c endif # USE_CARBON endif # USE_COCOA else if TARGET_QTOPIA MAINLIB_ARCH_SRCS = qtopia/SDL_qtopia_main.cc else MAINLIB_ARCH_SRCS = dummy/SDL_dummy_main.c endif # !TARGET_QTOPIA endif # !TARGET_MACOSX endif # !TARGET_WIN32 libSDLmain_a_SOURCES = $(MAINLIB_ARCH_SRCS) # Build an internal library of any special app setup functions noinst_LTLIBRARIES = libarch.la if TARGET_BEOS ARCH_SRCS = beos/SDL_BeApp.cc beos/SDL_BeApp.h else ARCH_SRCS = arch.c endif libarch_la_SOURCES = $(ARCH_SRCS) exports: for i in $(ARCH_SUBDIRS); do if [ -d $$i/exports ]; then (cd $$i/exports; make); fi; done # The architecture specific directories need to be copied into place # when building a distribution. dist-hook: (cd $(distdir) && rm -f $(BUILT_SOURCES)) cp -rp $(ARCH_SUBDIRS) $(distdir) (cd $(distdir) && rm -rf `find . -name CVS`)