diff options
Diffstat (limited to 'libstroke')
| -rw-r--r-- | libstroke/Makefile.am | 48 | ||||
| -rw-r--r-- | libstroke/Makefile.in | 412 | ||||
| -rw-r--r-- | libstroke/stroke.c | 395 | ||||
| -rw-r--r-- | libstroke/stroke.h | 40 |
4 files changed, 895 insertions, 0 deletions
diff --git a/libstroke/Makefile.am b/libstroke/Makefile.am new file mode 100644 index 0000000..30798a8 --- /dev/null +++ b/libstroke/Makefile.am @@ -0,0 +1,48 @@ +# A brief demonstration of using Automake with Libtool. -*-Makefile-*- +# +# NOTE: Don't forget that in the libtool distribution, files in this +# directory are distributed by the demo_distfiles variable in the top +# level Makefile. +AUTOMAKE_OPTIONS = foreign + +EXTRA_DIST = + +#tclpath:: + #echo ${ENABLE_TCL} + +#if ENABLE_TCL +#SEL_BIB = libstroke.la libstroke_tcl.la +#else +#SEL_BIB = libstroke.la +#endif +# +#SEL_FIB = +#if ENABLE_TCL +#libstroke_tcl_la_SOURCES = tcl.c stroke.c +#SEL_FIB = libstroke_tcl.la +#endif +#SEL_FIB = $(SEL_FIB) libstroke.la +# +#lib_LTLIBRARIES = $(SEL_FIB) + +lib_LTLIBRARIES = libstroke.la +#libstroke_tcl_la_LDFLAGS = -ltcl -version-info 0:5:0 +libstroke_la_SOURCES = stroke.c stroke.h + +libstroke_la_LDFLAGS = -version-info 0:5:0 + +include_HEADERS = stroke.h + +INCLUDES = -I$(top_srcdir)/libstroke @X_CFLAGS@ + +EXTRA_DIST = + +MOSTLYCLEANFILES = core *~ +CLEANFILES = core *~ +DISTCLEANFILES = core *~ +MAINTAINERCLEANFILES = core *~ + +# Unfortunately, in order to test libtool thoroughly, we need access +# to its private directory. +objdir = `sed -n -e 's/^objdir=\"\(.*\)\"$$/\1/p' ./libtool` + diff --git a/libstroke/Makefile.in b/libstroke/Makefile.in new file mode 100644 index 0000000..1850b84 --- /dev/null +++ b/libstroke/Makefile.in @@ -0,0 +1,412 @@ +# Makefile.in generated automatically by automake 1.4 from Makefile.am + +# Copyright (C) 1994, 1995-8, 1999 Free Software Foundation, Inc. +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +# A brief demonstration of using Automake with Libtool. -*-Makefile-*- +# +# NOTE: Don't forget that in the libtool distribution, files in this +# directory are distributed by the demo_distfiles variable in the top +# level Makefile. + + +SHELL = @SHELL@ + +srcdir = @srcdir@ +top_srcdir = @top_srcdir@ +VPATH = @srcdir@ +prefix = @prefix@ +exec_prefix = @exec_prefix@ + +bindir = @bindir@ +sbindir = @sbindir@ +libexecdir = @libexecdir@ +datadir = @datadir@ +sysconfdir = @sysconfdir@ +sharedstatedir = @sharedstatedir@ +localstatedir = @localstatedir@ +libdir = @libdir@ +infodir = @infodir@ +mandir = @mandir@ +includedir = @includedir@ +oldincludedir = /usr/include + +DESTDIR = + +pkgdatadir = $(datadir)/@PACKAGE@ +pkglibdir = $(libdir)/@PACKAGE@ +pkgincludedir = $(includedir)/@PACKAGE@ + +top_builddir = .. + +ACLOCAL = @ACLOCAL@ +AUTOCONF = @AUTOCONF@ +AUTOMAKE = @AUTOMAKE@ +AUTOHEADER = @AUTOHEADER@ + +INSTALL = @INSTALL@ +INSTALL_PROGRAM = @INSTALL_PROGRAM@ $(AM_INSTALL_PROGRAM_FLAGS) +INSTALL_DATA = @INSTALL_DATA@ +INSTALL_SCRIPT = @INSTALL_SCRIPT@ +transform = @program_transform_name@ + +NORMAL_INSTALL = : +PRE_INSTALL = : +POST_INSTALL = : +NORMAL_UNINSTALL = : +PRE_UNINSTALL = : +POST_UNINSTALL = : +host_alias = @host_alias@ +host_triplet = @host@ +AS = @AS@ +CC = @CC@ +DLLTOOL = @DLLTOOL@ +GTK_CFLAGS = @GTK_CFLAGS@ +GTK_CONFIG = @GTK_CONFIG@ +GTK_LIBS = @GTK_LIBS@ +LD = @LD@ +LIBTOOL = @LIBTOOL@ +LN_S = @LN_S@ +MAINT = @MAINT@ +MAKEINFO = @MAKEINFO@ +NM = @NM@ +PACKAGE = @PACKAGE@ +RANLIB = @RANLIB@ +USE_SYMBOL_UNDERSCORE = @USE_SYMBOL_UNDERSCORE@ +VERSION = @VERSION@ +X_CFLAGS = @X_CFLAGS@ +X_LDFLAGS = @X_LDFLAGS@ + +AUTOMAKE_OPTIONS = foreign + +EXTRA_DIST = + +#if ENABLE_TCL +#SEL_BIB = libstroke.la libstroke_tcl.la +#else +#SEL_BIB = libstroke.la +#endif +# +#SEL_FIB = +#if ENABLE_TCL +#libstroke_tcl_la_SOURCES = tcl.c stroke.c +#SEL_FIB = libstroke_tcl.la +#endif +#SEL_FIB = $(SEL_FIB) libstroke.la +# +#lib_LTLIBRARIES = $(SEL_FIB) + +lib_LTLIBRARIES = libstroke.la +#libstroke_tcl_la_LDFLAGS = -ltcl -version-info 0:5:0 +libstroke_la_SOURCES = stroke.c stroke.h + +libstroke_la_LDFLAGS = -version-info 0:5:0 + +include_HEADERS = stroke.h + +INCLUDES = -I$(top_srcdir)/libstroke @X_CFLAGS@ + +MOSTLYCLEANFILES = core *~ +CLEANFILES = core *~ +DISTCLEANFILES = core *~ +MAINTAINERCLEANFILES = core *~ + +# Unfortunately, in order to test libtool thoroughly, we need access +# to its private directory. +objdir = `sed -n -e 's/^objdir=\"\(.*\)\"$$/\1/p' ./libtool` +mkinstalldirs = $(SHELL) $(top_srcdir)/mkinstalldirs +CONFIG_HEADER = ../config.h +CONFIG_CLEAN_FILES = +LTLIBRARIES = $(lib_LTLIBRARIES) + + +DEFS = @DEFS@ -I. -I$(srcdir) -I.. +CPPFLAGS = @CPPFLAGS@ +LDFLAGS = @LDFLAGS@ +LIBS = @LIBS@ +X_LIBS = @X_LIBS@ +X_EXTRA_LIBS = @X_EXTRA_LIBS@ +X_PRE_LIBS = @X_PRE_LIBS@ +libstroke_la_LIBADD = +libstroke_la_OBJECTS = stroke.lo +CFLAGS = @CFLAGS@ +COMPILE = $(CC) $(DEFS) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) +LTCOMPILE = $(LIBTOOL) --mode=compile $(CC) $(DEFS) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) +CCLD = $(CC) +LINK = $(LIBTOOL) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ +HEADERS = $(include_HEADERS) + +DIST_COMMON = Makefile.am Makefile.in + + +DISTFILES = $(DIST_COMMON) $(SOURCES) $(HEADERS) $(TEXINFOS) $(EXTRA_DIST) + +TAR = gtar +GZIP_ENV = --best +DEP_FILES = .deps/stroke.P +SOURCES = $(libstroke_la_SOURCES) +OBJECTS = $(libstroke_la_OBJECTS) + +all: all-redirect +.SUFFIXES: +.SUFFIXES: .S .c .lo .o .s +$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ Makefile.am $(top_srcdir)/configure.in $(ACLOCAL_M4) + cd $(top_srcdir) && $(AUTOMAKE) --foreign libstroke/Makefile + +Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status $(BUILT_SOURCES) + cd $(top_builddir) \ + && CONFIG_FILES=$(subdir)/$@ CONFIG_HEADERS= $(SHELL) ./config.status + + +mostlyclean-libLTLIBRARIES: + +clean-libLTLIBRARIES: + -test -z "$(lib_LTLIBRARIES)" || rm -f $(lib_LTLIBRARIES) + +distclean-libLTLIBRARIES: + +maintainer-clean-libLTLIBRARIES: + +install-libLTLIBRARIES: $(lib_LTLIBRARIES) + @$(NORMAL_INSTALL) + $(mkinstalldirs) $(DESTDIR)$(libdir) + @list='$(lib_LTLIBRARIES)'; for p in $$list; do \ + if test -f $$p; then \ + echo "$(LIBTOOL) --mode=install $(INSTALL) $$p $(DESTDIR)$(libdir)/$$p"; \ + $(LIBTOOL) --mode=install $(INSTALL) $$p $(DESTDIR)$(libdir)/$$p; \ + else :; fi; \ + done + +uninstall-libLTLIBRARIES: + @$(NORMAL_UNINSTALL) + list='$(lib_LTLIBRARIES)'; for p in $$list; do \ + $(LIBTOOL) --mode=uninstall rm -f $(DESTDIR)$(libdir)/$$p; \ + done + +.s.o: + $(COMPILE) -c $< + +.S.o: + $(COMPILE) -c $< + +mostlyclean-compile: + -rm -f *.o core *.core + +clean-compile: + +distclean-compile: + -rm -f *.tab.c + +maintainer-clean-compile: + +.s.lo: + $(LIBTOOL) --mode=compile $(COMPILE) -c $< + +.S.lo: + $(LIBTOOL) --mode=compile $(COMPILE) -c $< + +mostlyclean-libtool: + -rm -f *.lo + +clean-libtool: + -rm -rf .libs _libs + +distclean-libtool: + +maintainer-clean-libtool: + +libstroke.la: $(libstroke_la_OBJECTS) $(libstroke_la_DEPENDENCIES) + $(LINK) -rpath $(libdir) $(libstroke_la_LDFLAGS) $(libstroke_la_OBJECTS) $(libstroke_la_LIBADD) $(LIBS) + +install-includeHEADERS: $(include_HEADERS) + @$(NORMAL_INSTALL) + $(mkinstalldirs) $(DESTDIR)$(includedir) + @list='$(include_HEADERS)'; for p in $$list; do \ + if test -f "$$p"; then d= ; else d="$(srcdir)/"; fi; \ + echo " $(INSTALL_DATA) $$d$$p $(DESTDIR)$(includedir)/$$p"; \ + $(INSTALL_DATA) $$d$$p $(DESTDIR)$(includedir)/$$p; \ + done + +uninstall-includeHEADERS: + @$(NORMAL_UNINSTALL) + list='$(include_HEADERS)'; for p in $$list; do \ + rm -f $(DESTDIR)$(includedir)/$$p; \ + done + +tags: TAGS + +ID: $(HEADERS) $(SOURCES) $(LISP) + list='$(SOURCES) $(HEADERS)'; \ + unique=`for i in $$list; do echo $$i; done | \ + awk ' { files[$$0] = 1; } \ + END { for (i in files) print i; }'`; \ + here=`pwd` && cd $(srcdir) \ + && mkid -f$$here/ID $$unique $(LISP) + +TAGS: $(HEADERS) $(SOURCES) $(TAGS_DEPENDENCIES) $(LISP) + tags=; \ + here=`pwd`; \ + list='$(SOURCES) $(HEADERS)'; \ + unique=`for i in $$list; do echo $$i; done | \ + awk ' { files[$$0] = 1; } \ + END { for (i in files) print i; }'`; \ + test -z "$(ETAGS_ARGS)$$unique$(LISP)$$tags" \ + || (cd $(srcdir) && etags $(ETAGS_ARGS) $$tags $$unique $(LISP) -o $$here/TAGS) + +mostlyclean-tags: + +clean-tags: + +distclean-tags: + -rm -f TAGS ID + +maintainer-clean-tags: + +distdir = $(top_builddir)/$(PACKAGE)-$(VERSION)/$(subdir) + +subdir = libstroke + +distdir: $(DISTFILES) + here=`cd $(top_builddir) && pwd`; \ + top_distdir=`cd $(top_distdir) && pwd`; \ + distdir=`cd $(distdir) && pwd`; \ + cd $(top_srcdir) \ + && $(AUTOMAKE) --include-deps --build-dir=$$here --srcdir-name=$(top_srcdir) --output-dir=$$top_distdir --foreign libstroke/Makefile + @for file in $(DISTFILES); do \ + d=$(srcdir); \ + if test -d $$d/$$file; then \ + cp -pr $$d/$$file $(distdir)/$$file; \ + else \ + test -f $(distdir)/$$file \ + || ln $$d/$$file $(distdir)/$$file 2> /dev/null \ + || cp -p $$d/$$file $(distdir)/$$file || :; \ + fi; \ + done + +DEPS_MAGIC := $(shell mkdir .deps > /dev/null 2>&1 || :) + +-include $(DEP_FILES) + +mostlyclean-depend: + +clean-depend: + +distclean-depend: + -rm -rf .deps + +maintainer-clean-depend: + +%.o: %.c + @echo '$(COMPILE) -c $<'; \ + $(COMPILE) -Wp,-MD,.deps/$(*F).pp -c $< + @-cp .deps/$(*F).pp .deps/$(*F).P; \ + tr ' ' '\012' < .deps/$(*F).pp \ + | sed -e 's/^\\$$//' -e '/^$$/ d' -e '/:$$/ d' -e 's/$$/ :/' \ + >> .deps/$(*F).P; \ + rm .deps/$(*F).pp + +%.lo: %.c + @echo '$(LTCOMPILE) -c $<'; \ + $(LTCOMPILE) -Wp,-MD,.deps/$(*F).pp -c $< + @-sed -e 's/^\([^:]*\)\.o[ ]*:/\1.lo \1.o :/' \ + < .deps/$(*F).pp > .deps/$(*F).P; \ + tr ' ' '\012' < .deps/$(*F).pp \ + | sed -e 's/^\\$$//' -e '/^$$/ d' -e '/:$$/ d' -e 's/$$/ :/' \ + >> .deps/$(*F).P; \ + rm -f .deps/$(*F).pp +info-am: +info: info-am +dvi-am: +dvi: dvi-am +check-am: all-am +check: check-am +installcheck-am: +installcheck: installcheck-am +install-exec-am: install-libLTLIBRARIES +install-exec: install-exec-am + +install-data-am: install-includeHEADERS +install-data: install-data-am + +install-am: all-am + @$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am +install: install-am +uninstall-am: uninstall-libLTLIBRARIES uninstall-includeHEADERS +uninstall: uninstall-am +all-am: Makefile $(LTLIBRARIES) $(HEADERS) +all-redirect: all-am +install-strip: + $(MAKE) $(AM_MAKEFLAGS) AM_INSTALL_PROGRAM_FLAGS=-s install +installdirs: + $(mkinstalldirs) $(DESTDIR)$(libdir) $(DESTDIR)$(includedir) + + +mostlyclean-generic: + -test -z "$(MOSTLYCLEANFILES)" || rm -f $(MOSTLYCLEANFILES) + +clean-generic: + -test -z "$(CLEANFILES)" || rm -f $(CLEANFILES) + +distclean-generic: + -rm -f Makefile $(CONFIG_CLEAN_FILES) + -rm -f config.cache config.log stamp-h stamp-h[0-9]* + -test -z "$(DISTCLEANFILES)" || rm -f $(DISTCLEANFILES) + +maintainer-clean-generic: + -test -z "$(MAINTAINERCLEANFILES)" || rm -f $(MAINTAINERCLEANFILES) +mostlyclean-am: mostlyclean-libLTLIBRARIES mostlyclean-compile \ + mostlyclean-libtool mostlyclean-tags mostlyclean-depend \ + mostlyclean-generic + +mostlyclean: mostlyclean-am + +clean-am: clean-libLTLIBRARIES clean-compile clean-libtool clean-tags \ + clean-depend clean-generic mostlyclean-am + +clean: clean-am + +distclean-am: distclean-libLTLIBRARIES distclean-compile \ + distclean-libtool distclean-tags distclean-depend \ + distclean-generic clean-am + -rm -f libtool + +distclean: distclean-am + +maintainer-clean-am: maintainer-clean-libLTLIBRARIES \ + maintainer-clean-compile maintainer-clean-libtool \ + maintainer-clean-tags maintainer-clean-depend \ + maintainer-clean-generic distclean-am + @echo "This command is intended for maintainers to use;" + @echo "it deletes files that may require special tools to rebuild." + +maintainer-clean: maintainer-clean-am + +.PHONY: mostlyclean-libLTLIBRARIES distclean-libLTLIBRARIES \ +clean-libLTLIBRARIES maintainer-clean-libLTLIBRARIES \ +uninstall-libLTLIBRARIES install-libLTLIBRARIES mostlyclean-compile \ +distclean-compile clean-compile maintainer-clean-compile \ +mostlyclean-libtool distclean-libtool clean-libtool \ +maintainer-clean-libtool uninstall-includeHEADERS \ +install-includeHEADERS tags mostlyclean-tags distclean-tags clean-tags \ +maintainer-clean-tags distdir mostlyclean-depend distclean-depend \ +clean-depend maintainer-clean-depend info-am info dvi-am dvi check \ +check-am installcheck-am installcheck install-exec-am install-exec \ +install-data-am install-data install-am install uninstall-am uninstall \ +all-redirect all-am all installdirs mostlyclean-generic \ +distclean-generic clean-generic maintainer-clean-generic clean \ +mostlyclean distclean maintainer-clean + + +#tclpath:: + #echo ${ENABLE_TCL} + +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/libstroke/stroke.c b/libstroke/stroke.c new file mode 100644 index 0000000..4fccd01 --- /dev/null +++ b/libstroke/stroke.c @@ -0,0 +1,395 @@ +/* + libstroke - an X11 stroke interface library + Copyright (c) 1996,1997,1998,1999 Mark F. Willey, ETLA Technical + + See the files COPYRIGHT and LICENSE for distribution information. +*/ + +#include "config.h" +#include "stroke.h" + +#include <unistd.h> +#include <stdlib.h> +#include <stdio.h> +#include <math.h> + +#ifdef STROKE_MOUSE_FOOTPRINTS +#include <X11/Xutil.h> +#endif + +#ifndef TRUE +#define TRUE 1 +#define FALSE 0 +#endif + + +/* structure for holding point data */ +typedef struct s_point *p_point; + +static struct s_point { + int x; + int y; + p_point next; +} point; + +/* point list head and tail */ +static p_point point_list_head; +static p_point point_list_tail; + + + +/* determine which bin a point falls in */ +static int stroke_bin (p_point point_p, int bound_x_1, int bound_x_2, + int bound_y_1, int bound_y_2); + + + +/* point list head and tail */ +static p_point point_list_head=NULL; +static p_point point_list_tail=NULL; + +/* metrics fo input stroke */ +static int min_x = 10000; +static int min_y = 10000; +static int max_x = -1; +static int max_y = -1; +static int point_count = 0; + +#ifdef STROKE_MOUSE_FOOTPRINTS +/*FIXME: Maybe these should be put in a structure, and not static...*/ +static Display * stroke_disp; +static Window stroke_window; +static GC stroke_gc; + +static int use_mouse_footprints; /* True if using mouse footprints */ +#endif + +static void init_stroke_data (void) +{ + while (point_list_head != NULL) { + point_list_tail = point_list_head; + point_list_head = point_list_head->next; + free (point_list_tail); + } + point_list_tail = NULL; +} + +#ifdef STROKE_MOUSE_FOOTPRINTS +void stroke_init_with_mouse_footprints (Display *disp, Window wind) +{ + XSetWindowAttributes w_attr; + XWindowAttributes orig_w_attr; + unsigned long mask, col_border, col_background; + unsigned int border_width; + int screen = DefaultScreen (disp); + XSizeHints hints; + + stroke_disp = disp; + + XGetWindowAttributes (stroke_disp, wind, &orig_w_attr); + hints.x = orig_w_attr.x; + hints.y = orig_w_attr.y; + hints.width = orig_w_attr.width; + hints.height = orig_w_attr.height; + + /* Let the X server take care of whats underneath this window, + rather than the client applications, it'll also prevent needless + Expose events. NOTE: Not all X servers support this */ + mask = CWSaveUnder; + w_attr.save_under = True; + + /* inhibit all the decorations */ + mask |= CWOverrideRedirect; + w_attr.override_redirect = True; + + /* Don't set a background, transparent window */ + mask |= CWBackPixmap; + w_attr.background_pixmap = None; + + /* Default input window look */ + col_background = WhitePixel (stroke_disp, screen); + + /* no border for the window */ + border_width = 0; + col_border = BlackPixel (stroke_disp, screen); + + stroke_window = XCreateSimpleWindow (stroke_disp, wind, + hints.x, hints.y, + hints.width, hints.height, + border_width, + col_border, col_background); + + stroke_gc = XCreateGC (stroke_disp, stroke_window, 0, NULL); + + XSetFunction (stroke_disp, stroke_gc, GXinvert); + + XChangeWindowAttributes (stroke_disp, stroke_window, mask, &w_attr); + + XSetLineAttributes (stroke_disp, stroke_gc, 2, LineSolid, + CapButt, JoinMiter); + + /*FIXME: is this call really needed? If yes, does it need the real + argc and argv? */ + hints.flags = PPosition | PSize; + XSetStandardProperties (stroke_disp, stroke_window, "stroke_test", NULL, + (Pixmap)NULL, NULL, 0, &hints); + + + /* Receive the close window client message */ + { + /* FIXME: is this really needed? If yes, something should be done + with wmdelete...*/ + Atom wmdelete = XInternAtom (stroke_disp, "WM_DELETE_WINDOW", + False); + XSetWMProtocols (stroke_disp, stroke_window, &wmdelete, True); + } + use_mouse_footprints = 1; + init_stroke_data (); +} +#endif + +void stroke_init (void) +{ +#ifdef STROKE_MOUSE_FOOTPRINTS + use_mouse_footprints = 0; +#endif + init_stroke_data (); +} + + + +int stroke_trans (char *sequence) +{ + /* number of bins recorded in the stroke */ + int sequence_count = 0; + + /* points-->sequence translation scratch variables */ + int prev_bin = 0; + int current_bin = 0; + int bin_count = 0; + + /* flag indicating the start of a stroke - always count it in the sequence */ + int first_bin = TRUE; + + /* bin boundary and size variables */ + int delta_x, delta_y; + int bound_x_1, bound_x_2; + int bound_y_1, bound_y_2; + +#ifdef STROKE_MOUSE_FOOTPRINTS + if (use_mouse_footprints) + { + XUnmapWindow (stroke_disp, stroke_window); + XFlush (stroke_disp); + } +#endif + + /* determine size of grid */ + delta_x = max_x - min_x; + delta_y = max_y - min_y; + + /* calculate bin boundary positions */ + bound_x_1 = min_x + (delta_x / 3); + bound_x_2 = min_x + 2 * (delta_x / 3); + + bound_y_1 = min_y + (delta_y / 3); + bound_y_2 = min_y + 2 * (delta_y / 3); + + if (delta_x > STROKE_SCALE_RATIO * delta_y) { + bound_y_1 = (max_y + min_y - delta_x) / 2 + (delta_x / 3); + bound_y_2 = (max_y + min_y - delta_x) / 2 + 2 * (delta_x / 3); + } else if (delta_y > STROKE_SCALE_RATIO * delta_x) { + bound_x_1 = (max_x + min_x - delta_y) / 2 + (delta_y / 3); + bound_x_2 = (max_x + min_x - delta_y) / 2 + 2 * (delta_y / 3); + } + + /* + printf ("DEBUG:: point count: %d\n",point_count); + printf ("DEBUG:: min_x: %d\n",min_x); + printf ("DEBUG:: max_x: %d\n",max_x); + printf ("DEBUG:: min_y: %d\n",min_y); + printf ("DEBUG:: max_y: %d\n",max_y); + printf ("DEBUG:: delta_x: %d\n",delta_x); + printf ("DEBUG:: delta_y: %d\n",delta_y); + printf ("DEBUG:: bound_x_1: %d\n",bound_x_1); + printf ("DEBUG:: bound_x_2: %d\n",bound_x_2); + printf ("DEBUG:: bound_y_1: %d\n",bound_y_1); + printf ("DEBUG:: bound_y_2: %d\n",bound_y_2); + */ + + /* + build string by placing points in bins, collapsing bins and + discarding those with too few points... + */ + + while (point_list_head != NULL) { + + /* figure out which bin the point falls in */ + current_bin = stroke_bin(point_list_head,bound_x_1, bound_x_2, + bound_y_1, bound_y_2); + /* if this is the first point, consider it the previous bin, + too. */ + prev_bin = (prev_bin == 0) ? current_bin : prev_bin; + /* printf ("DEBUG:: current bin: %d\n",current_bin); */ + + if (prev_bin == current_bin) + bin_count++; + else { /* we are moving to a new bin -- consider adding to the + sequence */ + if ((bin_count > (point_count * STROKE_BIN_COUNT_PERCENT)) + || (first_bin == TRUE)) { + first_bin = FALSE; + sequence[sequence_count++] = '0' + prev_bin; + /* printf ("DEBUG:: adding sequence: %d\n",prev_bin); + */ + } + + /* restart counting points in the new bin */ + bin_count=0; + prev_bin = current_bin; + } + + /* move to next point, freeing current point from list */ + point_list_tail = point_list_head; + point_list_head = point_list_head->next; + free (point_list_tail); + } + point_list_tail = NULL; + + /* add the last run of points to the sequence */ + sequence[sequence_count++] = '0' + current_bin; + /* printf ("DEBUG:: adding final sequence: %d\n",current_bin); */ + + /* bail out on error cases */ + if ((point_count < STROKE_MIN_POINTS) + || (sequence_count > STROKE_MAX_SEQUENCE)) { + point_count = 0; + strcpy (sequence,"0"); + return FALSE; + } + + /* add null termination and leave */ + point_count = 0; + sequence[sequence_count] = '\0'; + return TRUE; +} + +/* figure out which bin the point falls in */ +static int stroke_bin (p_point point_p, int bound_x_1, int bound_x_2, + int bound_y_1, int bound_y_2) +{ + int bin_num = 1; + if (point_p->x > bound_x_1) bin_num += 1; + if (point_p->x > bound_x_2) bin_num += 1; + if (point_p->y > bound_y_1) bin_num += 3; + if (point_p->y > bound_y_2) bin_num += 3; + + return bin_num; +} + +void stroke_record (int x, int y) +{ + p_point new_point_p; + int delx, dely; + float ix, iy; + + if (point_count < STROKE_MAX_POINTS) { + new_point_p = (p_point) malloc (sizeof(point)); + + if (point_list_tail == NULL) { + + /* first point in list - initialize list and metrics */ + point_list_head = point_list_tail = new_point_p; + min_x = 10000; + min_y = 10000; + max_x = -1; + max_y = -1; + point_count = 0; + + } else { +#ifdef STROKE_MOUSE_FOOTPRINTS + if (use_mouse_footprints) + { + XMapRaised(stroke_disp, stroke_window); + XDrawLine (stroke_disp, stroke_window, stroke_gc, + x, y, point_list_tail->x, point_list_tail->y); + XFlush (stroke_disp); + } +#endif + + /* interpolate between last and current point */ + delx = x - point_list_tail->x; + dely = y - point_list_tail->y; + + /* step by the greatest delta direction */ + if (abs(delx) > abs(dely)) { + iy = point_list_tail->y; + + /* go from the last point to the current, whatever direction it + may be */ + for (ix = point_list_tail->x; + (delx > 0) ? (ix < x) : (ix > x); + ix += (delx > 0) ? 1 : -1) { + + /* step the other axis by the correct increment */ + iy += fabs(((float) dely + / (float) delx)) * (float) ((dely < 0) ? -1.0 : 1.0); + + /* add the interpolated point */ + point_list_tail->next = new_point_p; + point_list_tail = new_point_p; + new_point_p->x = ix; + new_point_p->y = iy; + new_point_p->next = NULL; + + /* update metrics */ + if (((int) ix) < min_x) min_x = (int) ix; + if (((int) ix) > max_x) max_x = (int) ix; + if (((int) iy) < min_y) min_y = (int) iy; + if (((int) iy) > max_y) max_y = (int) iy; + point_count++; + + new_point_p = (p_point) malloc (sizeof(point)); + } + } else { /* same thing, but for dely larger than delx case... */ + ix = point_list_tail->x; + + /* go from the last point to the current, whatever direction + it may be */ + for (iy = point_list_tail->y; (dely > 0) ? (iy < y) : (iy > y); + iy += (dely > 0) ? 1 : -1) { + + /* step the other axis by the correct increment */ + ix += fabs(((float) delx / (float) dely)) + * (float) ((delx < 0) ? -1.0 : 1.0); + + /* add the interpolated point */ + point_list_tail->next = new_point_p; + point_list_tail = new_point_p; + new_point_p->y = iy; + new_point_p->x = ix; + new_point_p->next = NULL; + + /* update metrics */ + if (((int) ix) < min_x) min_x = (int) ix; + if (((int) ix) > max_x) max_x = (int) ix; + if (((int) iy) < min_y) min_y = (int) iy; + if (((int) iy) > max_y) max_y = (int) iy; + point_count++; + + new_point_p = (p_point) malloc (sizeof(point)); + } + } + + /* add the sampled point */ + point_list_tail->next = new_point_p; + point_list_tail = new_point_p; + } + + /* record the sampled point values */ + new_point_p->x = x; + new_point_p->y = y; + new_point_p->next = NULL; + } +} + diff --git a/libstroke/stroke.h b/libstroke/stroke.h new file mode 100644 index 0000000..0d3ee69 --- /dev/null +++ b/libstroke/stroke.h @@ -0,0 +1,40 @@ +/* + libstroke - an X11 stroke interface library + Copyright (c) 1996,1997,1998,1999 Mark F. Willey, ETLA Technical + + See the files COPYRIGHT and LICENSE for distribution information. +*/ + +/* largest number of points allowed to be sampled */ +#define STROKE_MAX_POINTS 10000 + +/* number of sample points required to have a valid stroke */ +#define STROKE_MIN_POINTS 50 + +/* maximum number of numbers in stroke */ +#define STROKE_MAX_SEQUENCE 20 + +/* threshold of size of smaller axis needed for it to define its own + bin size */ +#define STROKE_SCALE_RATIO 4 + +/* minimum percentage of points in bin needed to add to sequence */ +#define STROKE_BIN_COUNT_PERCENT 0.07 + +/* translate stroke to sequence */ +int stroke_trans (char *sequence); + +/* record point in stroke */ +void stroke_record (int x, int y); + +/* initialize stroke functions + There are 2 ways to initialize the stroke library: + stroke_init_with_mouse_footprints will draw mouse footprints + Use stroke_init if that is not desired, or if you have your own + implementation of footprints. */ +#ifdef STROKE_MOUSE_FOOTPRINTS +#include <X11/Xlib.h> +void stroke_init_with_mouse_footprints (Display *disp, Window wind); +#else +void stroke_init (void); +#endif |