changelog

触摸屏校验

	  This makes the touchscreen event boundary detection 100% correct
	  and removes the need for tricky assumptions tslib had to do until
	  now. If the EV_SYN macro is not defined, the old algorithm is
	  enabled instead.

	* plugins/variance.c: Rewrote almost from scratch the variance filter.
	  The old variance filter made the input very sluggish because it
	  lets out only one of every four input samples. Now it generates
	  approximatively 1:1 output, except that it filters out what it
	  thinks are "noise" samples.

	* plugins/dejitter.c: Rewrote almost from scratch the dejitter filter.
	  Now it just applies a weighted smoothing algorithm with most weight
	  in most recent samples; this leaves touchscreen input responsive and
	  still smooths out jitter.

	* tests/fbutilc.c: Improved a lot; added line drawing, rectangle
	  drawing and filled rectangle drawing, support for up to 256
	  user-defined colors.

	* tests/ts_test.c, tests/ts_calibrate.c: Update to take advantage of
	  the improved functionality of fbutils.c. The ts_test tool now has
	  a "drag" (old behaviour) and "draw" mode (the pen leaves a trace on
	  the screen).

2003-11-01 Chris Larson <[e-mail]>

	* plugins/pthres.c, plugins/Makefile.am, configure.in: Added pressure
	  threshold tslib plugin, which is used to ensure that the release
	  event's pressure is 0.

	* plugins/variance.c, plugins/dejitter.c: Removed pressure threshold
	  handling from plugins, now that pthres is handling it.

	* etc/ts.conf: Updated default ts.conf per changes due to pthres.

2003-08-05 Chris Larson <[e-mail]>

	* Updated README documentation.  Added information on what the various
	  TSLIB environment variables do, and information on a guideline for
	  tslib filter module creators.

2003-07-31 Chris Larson <[e-mail]>

	* Corrected some issues with automake usage, which included changing
	  references of CFLAGS to AM_CFLAGS where necessary.

2003-03-12 Chris Larson <[e-mail]>

	* Add a raw module linked list, connected to the primary list, to
	  facilitate tslib modules affecting ts_read_raw behavior.

2003-03-04 Douglas Lowder <[e-mail]>

	* Added support for COLLIE and CORGI event types (thanks to Chris Larson
	  of the OpenZaurus project)

2003-03-03 Douglas Lowder <[e-mail]>

	* Fixed segfault bug in src/ts_parse_args.c

2002-11-08  Douglas Lowder <[e-mail]>

	* Added patch from Scott Anderson to improve tests/ts_calibrate.c by taking
	  median of multiple samples for each point.

2002-08-29  Douglas Lowder <[e-mail]>

	* Added tests/ts_print_raw.c to print raw uncalibrated touchscreen events
	  (useful for debugging)

2002-07-11  Douglas Lowder <[e-mail]>

	* Added code in src/ts_read_raw.c to handle reading events from the mk712
	  touchscreen driver on the Hitachi Webpad.

	* Fixed a bug in plugins/linear.c (incorrect default calibration in
	  absence of /etc/pointercal)

2002-07-10  Douglas Lowder <[e-mail]>

	* Added a patch by Holger Schurig <[e-mail]> to fix
	  issues encountered on an Accelent PXA250 board.  The patch is against
	  tests/ts_calibrate.c.  Among other things, it removes the extra event
	  that was being read before the first crosshair is painted.

	* Modified the code in plugins/dejitter.c to guarantee that the "release"
	  touchscreen event (event with pressure=0 that occurs when the pointer is
	  lifted from the screen) has the same xy position as the preceding event.
	  This eliminates the cursor "jumping" that can occur otherwise.

	* Fixed a bug in src/ts_read_raw.c that caused segfaults if TSLIB_TSEVENTTYPE
	  was not defined in the environment.

2002-07-05  Douglas Lowder <[e-mail]>

	* libts.so now handles both UCB1x00 and H3600 type touchscreen events.  Default
	  is UCB1x00; H3600 is selected by setting environment variable
	  TSLIB_TSEVENTTYPE to the value "H3600".

	* With the above change, generation of libtsipaq.so is no longer required,
	  and it has been removed.

2002-07-03  Douglas Lowder <[e-mail]>

	* Added back the code to open the virtual console (works if device file chosen
	  correctly).

	* Made the console device and framebuffer device configurable for ts_calibrate
	  and ts_test: new environment variables defined.
	  TSLIB_FBDEVICE (defaults to /dev/fb0)
	  TSLIB_CONSOLEDEVICE (defaults to /dev/tty)

	  On a system using devfs, the above should be set to /dev/fb/0 and /dev/vc/,
	  respectively.

2002-07-01  Douglas Lowder <[e-mail]>

	* Fixes to make this code work better on targets with framebuffers that have
	  more than 8 bits per pixel (changes to tests/fbutils.c):
	  * Removed the code that attempts to change colormap
	  * Temporarily commented out the code that opens /dev/tty1 (does not work on all targets)

	* Fixed the test program so that the crosshair is drawn XORed with the text on the screen,
	  so the text is not corrupted when the crosshair moves over it. (tests/fbutils.c)

	* Made the code much more configurable by adding checks for environment variables:
	  TSLIB_CALIBFILE -- location of calibration file for linear plugin (default: /etc/pointercal)
	  TSLIB_CONFFILE -- location of configuration file (default: /usr/local/etc/ts.conf)
	  TSLIB_PLUGINDIR -- location of plugins (default: /usr/local/share/ts/plugins)
	  TSLIB_TSDEVICE -- Name of touchscreen device file if not using input API (default: /dev/touchscreen/ucb1x00)

	* Added new file, src/ts_read_raw_ipaq.c, to make code work with the h3600_ts driver
	  on the Compaq iPAQ.  This creates a new library, libtsipaq.so, that should replace
	  the default libts.so if using this code on an iPAQ.

2002-06-19  Douglas Lowder <[e-mail]>

	* Fixed a problem that caused tslib_parse_vars() (src/ts_parse_vars.c) to not
	  read parameters correctly from the ts.conf file.

	* Made modifications to simplify and improve the performance of the dejitter filter
	  (plugins/dejitter.c).

	* Added the configure script and Makefile.in files, plus other files generated by
	  autogen.sh, so that only "configure" needs to be run before running "make".
	  If a user wishes to rerun the automake and autoconf steps, run "autogen-clean.sh"
	  and then "autogen.sh".

2002-06-17  Douglas Lowder <[e-mail]>

	* I added a simple script, autogen-clean.sh, to make it easier to change configure.in
	  and regenerate configure scripts and Makefiles.

	* I made modifications so that npitre's new input API code is now wrapped in
	  #ifdef USE_INPUT_API.  Added a new configure flag, --enable-inputapi, which
	  is turned on by default, and which adds -DUSE_INPUT_API to CFLAGS in all the
	  Makefiles.  --disable-inputapi will return the code to its original behavior
	  of opening /dev/touchscreen/ucb1x00 and reading events directly.

	* I modified plugins/linear.c so that it determines the full linear transformation
	  between touchscreen and framebuffer coordinate systems.  This method not only
	  rescales and offsets the coordinates correctly, but also automatically takes care
	  of rotation or tilt between the coordinate systems, and automatically takes care
	  of cases where X and Y are interchanged.  Therefore, the xyswap parameter is
	  no longer required or used.

	* I found the framebuffer code in tests/ts_calibrate.c and tests/ts_test.c to be
	  broken, and fixed it so it works correctly (used ADS GraphicsClient+ and an Intel
	  DBPXA250 (Lubbock) Xscale target for testing).
	  Since there was a lot of duplication, I extracted all the framebuffer specific stuff
	  to new files fbutils.c and fbutils.h, so it will be easier to add more framebuffer
	  tests in future if desired.  I also extract a couple of fonts and wrote simple text
	  printing code so text messages can be displayed in ts_test and ts_calibrate.

	* I added a new configure flag, --enable-debug, which is turned off by default.  When
	  enabled, it adds -g -ggdb -DDEBUG to CFLAGS in all the Makefiles.  I have debug
	  print statements in ts_read_raw and in the plugins that are wrapped with #ifdef DEBUG --
	  this way I can see how many events are being filtered away and get a better idea
	  of what the filters are doing.

	* Joanne Woo <[e-mail]> added C++ wrappers to the header files so this library
	  can be safely used with C++ code.