Changements depuis la version 3.11

3.9.32: S.Sakamaki a ajouté une fonction permettant de contrôler la fréquence de rafraîchissement avec le driver DOS VESA 3.0 (çà pourrait aussi être supporté par d'autres drivers si quelqu'un veut l'implémenter).
3.9.32: S.Suzuki a ajouté des drivers DOS drivers pour les cartes d'interface joystick IF-SEGA /PCI, /PCI2, et /ISA.
3.9.32: Fabrizio Gennari a ajouté des drivers DOS pour les joysticks multi-systèmes avec des connecteurs 9 broches (Atari, Commodore 64, MSX).
3.9.32: Peter Pavlovic a amélioré le support des maps pour les caractères accentués dans le driver clavier.
3.9.32: Sven Sandberg a optimisé le scrolling des listbox de la GUI en évitant de les redessiner si çà ne peut pas suivre avec la vitesse de rafraîchissement.
3.9.32: Olly Betts a fait un peu de travail permettant de cross-compiler la version djgpp sous linux.
3.9.32: Isaac Cruz a amélioré le driver fenêtré ddraw, en ajoutant un support pour plusieurs conversions de modes de couleur.
3.9.32: Vincent Penquerc'h a ajouté une fonction de mise à jour de la sélection dans le grabber.
3.9.32: plusieurs corrections de bugs faites par plusieurs personnes.
3.9.32: zipup.sh génère maintenant les dépendances en utilisant uniquement des outils Unix standards et gcc, ce qui permet de configurer toutes les plates-formes supportées sans avoir besoin des compilateurs spécifiques (ie. je peux créér toutes les dépendances Watcom, BeOS, et Mingw32 à partir de ma machine Linux). Ca demande un peu de coopération de la part des différentes cibles : elles doivent configurer leurs cibles "make depend" pour remplacer les defines standards de gcc, et entourer toutes les inclusions d'entêtes non standard avec "#ifndef SCAN_DEPEND".
3.9.32: correction (j'espère :-) du bug avec les zones horaires non-GMT dans le code de mise à jour des datafiles.
3.9.32: réécriture de la fonction Unicode usprintf() pour s'appuyer sur la librairie c lors d'une conversion de données en virgule flottante (trop difficile à faire par nous-mêmes :-)
3.9.31: Henrik Stokseth did some work on a native Mingw32 build. This is currently incomplete, and unlikely to work right now since there have been other changes in the Windows code since the version he started from. At the moment this version is statically linked, using makefile.mgs, and makefile.mgw still exists for the MSVC-piggyback version. The ultimate goal is to get this native version building as a DLL in addition to statically linked, at which point we can merge both makefiles into makefile.mgw and remove makefile.mgs. Oh yeah, and there are currently no docs for the native version.
3.9.31: Greg Hackmann contributed a Borland C++ Builder port. Like the RSXNT and Mingw32 versions, this is a client for the MSVC DLL, and not able to compile Allegro directly itself, but allows you to build Allegro programs using the Borland compiler.
3.9.31: Robert Ohannessian added MMX optimisation for the 8 and 16 bit clear() functions, and Jose Antonio Luque optimised the 16 bit blit() and masked_blit() routines.
3.9.31: Vincent Penquerc'h added a yield_timeslice() function (currently implemented in DOS and Unix).
3.9.31: added a desktop_color_depth() function (currently only implemented in X: a Windows version will follow).
3.9.31: Isaac Cruz added support for windowed modes in color depths other than the current Windows desktop, and hardware accelerated system bitmaps.
3.9.31: Jose Antonio Luque improved the Windows joystick driver.
3.9.31: James Hyman added support for dithering truecolor down to paletted images.
3.9.31: Chris La Mantia added textout_right(), textprintf_right(), and textprintf_justify() functions.
3.9.31: Sven Sandberg added a ustrrchr() function, and improved the usprintf() handling of large floating point values.
3.9.31: Peter Pavlovic added a Slovak keyboard mapping and message translation.
3.9.31: Manni Heumann fixed some problems with the German keyboard mapping.
3.9.31: Michael Bukin improved the X keyboard and mouse handling, and fixed some problems with building on non-GNU Unix systems.
3.9.31: many bugfixes and tweaks from various people (sorry, my typing patience has run out so you don't get a full list :-)
3.9.31: Peter Wang added input support to the Linux OSS sound driver.
3.9.31: David Kuhling optimised the i386/gcc fsqrt() code, and added an fhypot() routine.
3.9.30: fixed the double XOR that was making datafile passwords so easy to reverse. The new code can still read old-style encrypted files, but data written by this version can't be accessed by older copies of Allegro.
3.9.30: made load_datafile(), load_datafile_object(), and the file.dat#object syntax work correctly in all possible combinations.
3.9.30: Vincent Penquerc'h added a scare_mouse_area() function.
3.9.30: changed the DirectX surface locking mechanism, to improve the performance of hardware accelerated drawing.
3.9.30: George Foot improved the Linux LED code, and made the internal X driver state visible via xalleg.h.
3.9.30: added EINTR retry handling to read/write calls. I hope I got this right: if anyone who properly groks this stuff could check over file.c, that would be cool.
3.9.30: made the Windows mouse driver work correctly in windowed mode.
3.9.30: fixed various problems with Windows foreground/background switching (keys were getting stuck down, timers weren't being paused, and not all the right switching modes were being reported to the caller).
3.9.30: made the X keyboard handler release all keys when it loses the input focus, to avoid stuck buttons when you alt+tab between windows.
3.9.30: made the allegro-lib script arguments compatible with the standard used by GTK, ESD, etc, and renamed it to allegro-config. This changes the syntax for linking Allegro programs on Unix: see readme.uni for details of the new method.
3.9.30: George Foot improved the Unix shared library system.
3.9.30: Joerg Rueppel added a find_datafile_object() function.
3.9.30: Peter Wang improved the SVGAlib driver.
3.9.30: Peter Wang improved the Linux joystick driver.
3.9.29: made the Windows code agree with other platforms about how video bitmaps are supposed to behave.
3.9.29: fixed some problems with the Windows mouse wheel support.
3.9.29: added set_write_alpha_blender(), set_add_blender() and create_blender_table() functions, and made the 32 bit version of draw_trans_sprite() able to use 8 bit source images in conjunction with set_write_alpha_blender(). In addition to being generally useful, using these routines makes the sources for my SpeedHack entry much smaller :-)
3.9.29: added uninstall targets to the Linux makefile.
3.9.29: made the X windowed mouse driver hide the Allegro cursor when the mouse moves out of our window.
3.9.29: added a simple timer delay emulation of vsync() to the X code, so that eg. the demo worms game runs sensibly.
3.9.29: Isaac Cruz added a GFX_DIRECTX_WIN driver.
3.9.29: Keith Gerdes made some more improvements to the DirectX overlay driver.
3.9.29: Andrew Geers added scrolling support to the grabber image viewer.
3.9.29: Peter Wang added an alternative X DGA driver, that includes mode switching support to run in fullscreen mode.
3.9.29: Peter Wang added a MSG_WHEEL event to the GUI, and made d_list_proc() use it.
3.9.29: Lucas Vignoli Reis added a Portuguese (Brazil) message translation and keyboard mapping.
3.9.29: Peter Wang added a Linux OSS MIDI driver for FM synth devices, and mixer support for the OSS digital driver.
3.9.29: George Foot added scripts for building various Linux distribution formats.
3.9.29: Michael Bukin fixed the portability problems in quantize.c.
3.9.29: added a zipwin.sh script for making Windows binary distributions, including a batch file that can compile the MSVC support programs without having any GNU tools installed.
3.9.29: fixed bug with color font rendering in the Windows version.
3.9.29: added hardware accelerated rectfill() and hline() to the Windows version, and fixed a couple of accel related bugs (clears were being clipped wrongly, and it was claiming to support XOR drawing even though that isn't supported).
3.9.29: Michael Bukin fixed bug with X drawing onto screen sub-bitmaps.
3.9.28: various documentation updates.
3.9.28: added parameter autodetection to the Unix OSS sound driver.
3.9.28: made it possible to nest calls to the Unix for_each_file() routine.
3.9.28: added a load_datafile_callback() function.
3.9.28: rationalised the sound config variables, so they can be shared between drivers more easily. For instance sb_freq has been renamed to sound_freq.
3.9.28: Antti Koskipaa added a DOS driver for WSS (Windows Sound System) cards.
3.9.28: the audiosteam code is now able to merge multiple buffers into a single larger one, so it will still work correctly even if the user supplies a buffer smaller than the current soundcard transfer size. You can even play streams with single byte buffers now, as long as you refill them often enough!
3.9.28: made the Windows timer code more robust, so it will no longer lock up when you install extremely high frequency callbacks.
3.9.28: Teijo Hakala added wheel support to the Windows mouse driver.
3.9.28: Peter Wang added wheel support to the X mouse driver.
3.9.28: Andrew Geers added -ppassword and -nosound options to the grabber.
3.9.28: Keith Gerdes fixed the DirectDraw overlay mode driver.
3.9.28: Isaac Cruz fixed the bug with accelerated drawing onto sub bitmaps of DirectDraw surfaces.
3.9.28: Peter Wang added banked mode support to the SVGAlib driver.
3.9.28: Peter Wang fixed some problems with the ESD sound driver, and added an ALSA driver.
3.9.28: palette fading speed is now timer regulated, to avoid problems with some systems (eg. DGA with non-matching color depth) where it can be excessively slow.
3.9.28: fixed a couple of different overflow bugs that were causing timers to run slow on heavily loaded Unix systems.
3.9.28: added a display of author credits to the demo game.
3.9.28: changed the info page installation system. It now creates a dir file in the same directory as the info page, rather than messing around with symlinks, and autoconf is used to locate the install-info program.
3.9.28: added an allegro-lib script to the Unix installation, which can be run by makefiles to find the right linker commandline for building Allegro programs.
3.9.28: added a manpage output format to the makedoc utility. It doesn't work terribly well with apropos due to the lack of a one-line summary for each function, but the basic formatting seems to be ok: please let me know if you see any problems.
3.9.28: patches from George Foot for Linux console handing, keyboard, and filename manipulations.
3.9.28: many improvements by Michael Bukin, in particular enhanced performance in X, better X mouse behaviour, and DGA graphics support.
3.9.27: Robert J. Ragno made some improvements to the Wingman, PSX, and throttle joystick input code.
3.9.27: Peter Wang added wheel input support to the Linux mouse code (this shows up as a new mouse_z state variable).
3.9.27: Patrick Hogan made Windows audiostreams work properly.
3.9.27: Sven Sandberg optimised the spline routines.
3.9.27: Tomohiko Sugiura added KEY_YEN and KEY_YEN2 Japanese keys to the input handler.
3.9.27: Chris Robinson wrote a fixed point version of clip3d_f(), called (surprise!) clip3d().
3.9.27: Sven Sandberg improved the file selector sorting algorithm.
3.9.27: Henrik Stokseth improved the OS detection in the Windows lib.
3.9.27: Sven Sandberg made more accurately rounded lookup tables for the fixed point trig routines.
3.9.27: George Foot made the fbcon driver reset the palette on exit.
3.9.27: much new X code from Michael Bukin: this stuff is working brilliantly now!
3.9.27: added the X library path to the Linux liballeg.a wrapper. I think I prefer Michael's idea of having a script to return this info, though, so perhaps we should change across to doing it that way.
3.9.27: fixed various bugs in both the C and i386 RLE sprite code (mostly relating to lit modes and hicolor formats).
3.9.27: front-ported various fixes from the 3.12 release, to make WARNMODE=1 compile cleanly with gcc 2.95.
3.9.27: Knut Pape improved the Mingw32 readme file.
3.9.26: rewrote the DOS Sidewinder driver, after powerjaw sent me a pad to test it with. It still doesn't work for me in DOS mode, but it is ok under Windows, which is better than before, and as good as any of the other Sidewinder code that I've been able to locate. If anyone has or knows of code that works better than this, please let me know!
3.9.26: more flexible mode flags for set_color_conversion().
3.9.26: Robert J. Ragno added a driver for Gravis GrIP devices.
3.9.26: Gorka Olaizola added a Redhat RPM .spec file.
3.9.26: Stepan Roh updated the Czech translation and added multiple codepage support to the textconv utility, and a Unicode-aware ustrtod() function.
3.9.26: added ustrdup() to the Unicode support functions.
3.9.26: Sven Sandberg optimised the gcc fixed point math routines to collapse constant expressions at compile time.
3.9.26: Stefan T. Boettner added a proper Linux SVGAlib driver.
3.9.26: several tweaks from Vincent Penquerc'h (added a datafile merge function to the grabber, GUI bugfixes, optimised spline calculation, fix for 24 bit version of the C drawing code).
3.9.26: Linux patches from Michael Bukin improve the OSS sound driver, SIGALRM handling, and X keyboard driver.
3.9.26: many Linux patches from George Foot (fixes to the mouse driver, shared library and configure script, and assorted other stuff).
3.9.25: fixed pckeys.c to leave sensible data in the key[] array when doing numeral vs. arrow key numlock fakery.
3.9.25: fixed a bunch of problems with the SWITCH_BACKGROUND mode (I'd stupidly forgotten to disable a lot of graphics driver functions that could do bad things if called when the Allegro console isn't active).
3.9.25: added pivot_sprite() and pivot_scaled_sprite() functions (thanks to Matt Jallo for the suggestion).
3.9.25: added ustrerror() to the standard Unicode support functions.
3.9.25: fixed the d_edit_proc() GUI object to handle shift+tab focus movement properly.
3.9.25: lots of Linux patches from George Foot (proper fbcon mode setting, different mouse types and setup program support for configuring them, fixes to the shared library support, exedat no longer destroys the file permissions, and probably some other stuff that I forgot about).
3.9.24: assorted bugfixes to the Linux fbcon and sound code (this is mostly an emergency release because these were broken in 3.9.23).
3.9.24: James Arthur wrote some docs for the Photoshop-style truecolor blender routines.
3.9.23: Michael Bukin added an OSS sound driver to the Linux code, and the beginnings of an ESD driver.
3.9.23: many Linux patches from George Foot, including shared library support.
3.9.23: Ole Laursen made the Unicode utolower() and utoupper() functions understand the entire 16 bit character set.
3.9.23: Pavlos Touboulidis made file_select() able to include or exclude files based on their attributes.
3.9.23: the d_check_proc() GUI object can now print the text to the right of the check, selected by having a non-zero d1 field.
3.9.23: changed my mind about how GFX_SAFE should work, and removed the color depth emulation bodges. Now, the GFX_SAFE driver may simply change the color depth if it doesn't like what you are requesting, and it is up to the caller to deal with this.
3.9.23: fixed problems with MMX polygon rendering code in the MSVC version.
3.9.23: added a strictwarn option to the configure script, and fixed everything that it moaned about. The warnings still aren't all that strict: at some point I want to sit down and make it build clearnly with -W, as well as -Wall -Werror.
3.9.22: fixed some potential race conditions introduced by my previous fixes to the Windows timer code.
3.9.22: made set_display_switch_callback() able to install multiple hook functions, added a remove_display_switch_callback() routine, and wrote an exswitch example program.
3.9.22: adjusted MSVC inline asm syntax in an attempt to work around compiler version conflicts.
3.9.22: more flexible GFX_SAFE system. As well as defining fixed safe values for each platform, you can now leave out those definitions to get zeros passed through to the actual hardware drivers, and if your driver sets a color depth other than the requested one, graphics.c will hook up some emulation routines so that everything still works in a sensible way.
3.9.22: George Foot added a scancode to ASCII conversion function to the keyboard driver (implemented for DOS, Windows, Linux, and X). This is needed to handle alt+key input sensibly when using unusual mappings like the Dvorak layout.
3.9.22: Linux patches from George add better console switching, shared library support, and various other nice things.
3.9.22: Windows patch from Stefan adds much cool new stuff, including windowed mode support.
3.9.22: Peter Wang made the Linux GGI driver work properly.
3.9.22: Johan Venter made some more improvements to the RSXNT and Mingw32 makefiles.
3.9.22: updated the Watcom makefile to allow manual override of the 10.6 vs. 11.0 version detection, in case it guesses wrong.
3.9.21: Windows patch from Stefan adds support for the new screen mode switching system.
3.9.21: more BeOS patches from Jason Wilkins.
3.9.21: Johan Venter fixed some problems with the RSXNT and Mingw32 makefiles.
3.9.21: ran "configure --enable-asm=no", and fixed all the reasons why this didn't work. In particular there was a bug in patterned drawing modes, RLE sprites were broken, and I'd forgotten to add C versions of the RGBA sprite functions. Those of you who are interested in such things will be interested to know that the test program thinks the C drawing code is 20% slower at hline(), 10% slower at rectfill(), 50% slower at blitting, and 40% slower at draw_sprite(), which is not at all bad going. It's actually a bit faster at drawing translucent and lit sprites, so we need to have a look at that!
3.9.21: many new Linux patches from George Foot.
3.9.21: added VBE/AF support to the Linux code.
3.9.21: finished the Linux fbcon driver.
3.9.21: made Linux console switching work in a more complete manner, with a set of helper functions in dispsw.c. The background mode should work now, but is untested.
3.9.21: added Linux GGI driver by Carsten Schmidt (this is somewhat out of date, and doesn't work yet, but a good start if anyone wants to hack on it).
3.9.21: improved the Unix configure and build system. Moved more things into makefile.lst, so there are no file lists anywhere else now. Made it understand how to build the datafile tools, and convert the documentation (this may cause problems for systems without makeinfo: it would be good if someone who groks autoconf could try to do this better). Made the Linux VGA drivers (vga and modex) configurable.
3.9.21: added ctrl+alt+end abort sequence to the Linux keyboard driver.
3.9.21: directory structure changes: moved ufile.c into the misc directory, so BeOS can share it. Moved various helper scripts into the misc directory, including a cmplog.pl that compares two test.exe profile logs.
3.9.21: made the Linux PS2 mouse driver understand the middle button. Added a scaling factor to make it go at a more sensible speed in SVGA modes.
3.9.20: started working on a driver for the Linux fbcon device. It works, but can't change video mode yet.
3.9.20: Windows patch from Stefan adds joystick input, and the beginnings of a windowed mode driver.
3.9.20: moved all filename lists (even the platform specific ones) into makefile.lst, to avoid any duplication and give us a nice centralised place that mentions every single source file we use.
3.9.20: removed the install_lost_bitmap_callback() function, in favour of the more generic set_display_switch_mode(). Updated the Windows code to use these new routines.
3.9.20: merged X patch from Michael Bukin (adds mouse support).
3.9.20: Vincent Penquerc'h optimised the 256 to truecolor graphics blitting code to avoid repeated conversions of the palette table.
3.9.20: James Hyman added quoting support to get_config_argv().
3.9.20: Peter Cech optimised the alpha sprite blending routines. Shawn optimised them a bit more by expanding out specialised versions for common pixel formats.
3.9.20: Richard Davies made some improvements to the PSX joypad driver.
3.9.20: added a system driver parameter to allegro.cfg, and hooks to make the Unix version look for config data in /etc/ and ~/.
3.9.20: moved the Posix findfirst() emulation into libc.c, removing it from the autoconf and BeOS specific builds.
3.9.20: more BeOS patches from Jason Wilkins. The graphics stuff be working there now!
3.9.20: improved the VBE/AF driver to know that vertical lines can be implemented as a rectfill. This enables hardware acceleration for patterned vertical lines, and with drivers that don't have hardware support for the VBE/AF line draw routine.
3.9.20: George Foot did some major work on the Linux console version, getting it up and running in a fairly convincing way.
3.9.20: the Windows sound driver lists are now dynamically generated based on the available devices, so you can select which ones to use.
3.9.19: wrote the first part of an Allegro Hacker's Guide, which is my (probably futile :-) attempt to document at least a few of the more gory parts of the Allegro code.
3.9.19: finally got around to documenting the Unicode functions.
3.9.19: more BeOS patches from Jason Wilkins.
3.9.19: Michael Bukin made some more patches to the X code (timers are implemented now), and added a complete (?) C implementation of all the drawing code. Non-Intel machines, here we come! If you define ALLEGRO_USE_C before building the djgpp library, you can actually test out a pure C version of test.exe, the demo game, etc.
3.9.19: added a findtext.sh script, which scans the source code and creates a list of all the strings that are available for translation. It can also compare this list against an existing translation file, to see if any new messages need to be added.
3.9.19: Stepan Roh updated the Czech keyboard mapping for Unicode support, added support for keyconf to use a non-standard font, and added the Latin Extended-A characters (U+0100 to U+017F) to the default font.
3.9.19: Grzegorz Hankiewicz updated the Spanish translation with UTF-8 format (ie. properly accented) strings. Converted the setup program font into Latin-1 ordering so that this will display correctly. Fixed bug with dat2s not correctly converting the resulting multiple-range font.
3.9.19: Chris La Mantia made some cosmetic fixes to the d_slider_proc() GUI object.
3.9.19: Richard Davies added support for N64 joypads.
3.9.19: added keyboard_ucallback() (I missed this one when I first added the Unicode support).
3.9.19: made some changes to setup.c so that it can easily be embedded into other programs (thanks to Grzegorz Hankiewicz for the suggestion).
3.9.18: added support for 32 bit RGBA images. You can now read TGA files with an alpha channel into the grabber, or you can import a normal image and then overlay alpha data from any greyscale bitmap. You can save these alpha channels as part of a datafile, call the makeacol(r, g, b, a) function, and most importantly, call set_alpha_blender() and then draw_trans_sprite() to display them. Check out exalpha.c. There is much room to optimise the 15, 16, and 24 bit versions of _blender_alpha*(), if anyone wants to have a go at this. I think it would be profitable to write specific versions for common pixel orderings, and only keep the current generic implementation around as an emergency fallback.
3.9.18: more Unix patches from Michael Bukin. It builds flawlessly now, even if it doesn't do anything very interesting yet.
3.9.18: Jason Wilkins contributed the beginnings of a BeOS port (not yet functional, but it does compile).
3.9.18: Revin Guillen added a position_dialog() function.
3.9.18: portability improvements: changed makefile to be a generated stub, which normally just includes makefile.all, but can be completely replaced when using autoconf, and moved the emulation for missing libc functions into the shared sources.
3.9.18: numerous bugfixes.
3.9.17: Burton Radons changed the truecolor pixel blending functions to use a single callback function rather than the previous table. This may break some old code, but should remain largely backward compatible, and the new way is much more flexible. He also added a more complete set of blender functions, including Photoshop modes like burn, difference, lumincance, etc.
3.9.17: Richard Davies added support for PSX joypads.
3.9.17: fixed bug in dat2s handling of truecolor images.
3.9.17: Jason Wilkins improved the quaternion math routines, and added some documentation for them.
3.9.17: Neil Townsend added callback parameters to the timer handlers.
3.9.17: Gunter Ladwig added three-button mouse emulation, which can be enabled using the config file (it defaults to on if you have a two button mouse).
3.9.16: applied some patches from Michael Bukin, which add the basics of a Unix build system. It doesn't actually work yet, though :-)
3.9.16: merged new code from Stefan. Lots more cool things are working in the Windows version now, eg. hardware acceleration, triple buffering, sound...
3.9.16: added an example of how to write a Windows screensaver using Allegro. If anyone knows how to get a proper name to show up in the Windows selection dialog, please let me know! (I've made the stringtable entry that MSDN says you need, but it doesn't work).
3.9.16: Andy Goth added a d_text_list_proc() dialog object, that lets you alter the selection by typing the first few characters of a list entry.
3.9.16: Ole Laursen updated the Danish message translation.
3.9.16: Calvin French added a -w (always update) switch to dat.exe.
3.9.16: Joerg Rueppel added more flexible wildcard matching for object names in dat.exe.
3.9.16: added GFX_HW_SYS_TO_VRAM_BLIT and GFX_HW_SYS_TO_VRAM_BLIT_MASKED capabilities flags, and more flexible blitting functions in the vtable.
3.9.16: added lock_voice() and unlock_voice() methods to the digital sound driver, for implementing audiostreams under Windows.
3.9.16: _handle_timer_tick() now returns the desired gap until the next interrupt.
3.9.15: Michael Rickmann added a Mingw32 port. This currently works the same way as the RSXNT version, using MSVC to build the DLL, but will become a full gcc port after the core Windows code stabilises a bit.
3.9.15: Vincent Penquerc'h added a D_DIRTY flag for GUI objects, and I extended this with a new D_REDRAWME return code for the handlers.
3.9.15: changed the syntax of the create_color_table() callback. This breaks the API, but is the only way to make it work reliably with different compiler calling conventions.
3.9.15: added a sub bitmap creation hooks to the vtable structure (so the parent bitmap can be told when it is being cloned).
3.9.15: "make install" is now a separate target, not run automatically. This means that you now have to run "make" and "make install" as two separate operations, or if you want all three versions of the library, "make all" and then "make installall".
3.9.15: added an END_OF_MAIN() macro, which makes the WinMain() magic work correctly in any combination of C and C++ code.
3.9.15: Olly Betts modified the djgpp makefile to support cross-compiling on a Linux machine.
3.9.15: Andy Goth added a 256x256 tweaked VGA mode.
3.9.15: major documentation update (from now on I'll be adding a version number to each changelog comment).
Merged new code from Stefan. Windows version is getting much closer to completion, including mouse support and video bitmaps, although the mouse code isn't working quite right for me at the moment.
Rewrote fix_filename_path() to avoid calling _fixpath(). The new version is much more portable, although things like reading the current directory across multiple drives need some tweaking to work with different compilers.
Fixed oodles of things that were stopping the Watcom version from working. It now runs everything without any trouble at all, including such gems as exdodgy and the grabber shell edit! According to test.exe, gcc 2.8.1 is about 10% faster than Watcom 10.6 for most things, although for some reason textout() is about twice as fast in the Watcom version.
Fixed a bunch of stuff to make the RSXNT version work. All the tests and examples now build with RSXNT, and work identically to the MSVC originals.
Added quaternion math routines by Jason Wilkins.
Added more flexible gfx_card config support by Andy Goth.
Added a masked_stretch_blit() function (trivial change, the code could do it, but the API entry point was missing).
Added Windows GDI routines by Marian Dvorsky.
Added a DMA poll to the Soundscape driver, to make sure it can never get out of sync with the transfer.
Merged various bits and pieces that have been sitting around my hard drive for ages (Swedish and Norwegian translations, various patches from Michael Bukin, new palette generation code by Michal Mertl, Soundscape driver fixes by Andreas Kluge).
Grabber now knows about and can manipulate Unicode fonts.
Now passing atexit() as a parameter to install_allegro(), to avoid problems with DLL shutdown.
Made FLIC player set the dirty variables when clearing the bitmap at the start/loop point (this was sometimes causing the screen not to be cleared from previous contents).
Fixed several bugs in the grabber.
Changed the datafile utilities to link the datedit and plugin routines as a proper library. This will make life easier for third parties that want to use those routines (duplicating the plugin linkage isn't much fun).
Replaced errno references with allegro_errno pointer, to avoid problems with multiple runtimes when linking as a DLL. The MSVC version of dat now works perfectly!
Added a system_none driver for commandline utilities and other platform neutral situations.
Made new demo intro animation. My first ever Max rendering!
Merged Windows patches from Stefan. Whoah! This thing is cool. It works (sort of :-) on two platforms. Now I can die happy....
The file selector now adjusts for platforms without any directory list (eg. Unix).
Added a global default_palette (the normal IBM BIOS one), and made set_gfx_mode() select it.
Modified DIGMID driver to avoid using 64 bit ints or floating point in the interrupt handler.
Added ASSERT() and TRACE() debugging routines, and lots of asserts throughout the library code.
The default truecolor pixel format before setting a video mode is now BGR rather than RGB. This should help to shake out bugs in BGR support, and catch any errors where people load graphics before setting a video mode.
Fixed fmul() overflow detection bug.
Rewrote gpro.c and sw.c to avoid using inline asm. The SW code is currently very ugly (literal translation of the asm routine), but I'm keen to improve it given some testing feedback. If you have a Gamepad Pro or Sidewinder, and were able to use it with the Allegro 3.11 driver, I would _really_ like to hear whether this current code works for you or not...
Numerous changes to make the support programs more portable.
Added a get_executable_name() function.
The sound.cfg file is no longer supported. Use allegro.cfg instead.
Added versions of the inline _putpixel() and _getpixel() for all color depths.
The check_cpu() function is now called automatically by allegro_init().
Added system bitmap objects, which exist in system memory but are accessed in a similar way to video memory surfaces (this can enable better hardware acceleration on some platforms).
Added enable_triple_buffer(), timer_can_simulate_retrace(), and timer_is_using_retrace() functions. This enables programs to correctly handle the interrelationship between mode-X triple buffering, the retrace sync mode, and the current OS, without having to include any DOS specific code.
GUI routines now call the input polling functions and acquire/release the screen as appropriate.
Fixed a real show-stopping error that was causing VBE/AF crashes on some machines (calling driver functions with non-flat memory selector in %es).
Added an allegro_message() function.
Added dummy bank switch routines that can emulate linear access to a mode-X screen, albeit rather slowly. The only practical result from this is that polygon routines work in mode-X now, but it helps to make things more robust in general (if a routine doesn't know about mode-X, now it will just run more slowly than usual, rather than not working at all).
The SB, Adlib, and standard joystick drivers now properly have a separate instance for each variant of the hardware, rather than a single driver pretending to exist under multiple different ID codes.
Rewrote joystick polling to avoid inline asm.
Converted translation files into UTF-8 format. These can now use any Unicode characters they like, so accented vowels etc. can safely be used.
Keyboard scancodes have changed from the hardware format to an abstract, Allegro-specific encoding. This simplifies the code a great deal, and avoids hassles with two different keys generating the same scancode.
Added generic find_allegro_resource() function, which removes a lot of duplicated code from config.c, digmid.c, and pckeys.c.
Timer module now autoinstalls whenever someone tries to use it.
Keyboard functions can now alter the repeat rate.
Watcom port.
Added a special GFX_SAFE driver ID.
Now using VDS to detect win95 even when in stealth mode.
Added fixver.sh for patching version numbers and dates when releasing a new version (requires bash, fileutils, shutils, etc, to run on DOS).
Added zipup.sh for building a distribution zip and diffs, which automatically cleans up the tree ready for this (eg. pregenerating the dependency files for all supported compilers).
Added input polling functions.
Major code restucturing, added system drivers, new framework for input handling, timers, keyboard scancode conversion, file access, etc.
Added full support for Unicode text, including string manipulation functions, a new font format, the textconv utility, a new GUI MSG_UCHAR, and a ureadkey() function.
Added variable sized monochrome fonts, replacing the the old 8x8 fixed size format. As a result, the GFX_HW_TEXTOUT_FIXED capabilities flag has been renamed to GFX_HW_GLYPH.
New system for accessing video memory, using bmp_select(), bmp_write*(), and bmp_unwrite_line(). This is equivalent to the djgpp farptr functions, but portable to different platforms.
Drastic reorganisation of directory structure, makefile system, etc.
Enhanced the makedoc utility to simplify adding links and email addresses to the docs.
Added a bodge to make the VESA code work with broken S3 Trio64 drivers.
Removed the 386DX vs. 386SX processor detection code (it was sometimes crashing).

Changes from 3.11 to 3.12 (Aug 1999)

Fixed a few incompatibilities with gcc 2.95. This release is otherwise identical to 3.11.

Changes from 3.1 to 3.11 (Feb 1999)

Cleaned up a few places where memory wasn't getting freed during the system shutdown. A cosmetic detail since the OS will free it for us, but it is nice to get these things right.
Alessandro Monopoli added an Italian translation of the system messages.
Henrik Stokseth added code to distinguish between win95 and win98.
Creative Labs have been removed from the THANKS file, because of their refusal to release any specs on the SB Live soundcard.
Changed the name of the library. After years of thinking that Allegro was a word with no particular meaning, I realised that it is in fact a recursive acronym for "Allegro Low Level Game Routines".
Established a new mailing list (conductors@canvaslink.com) for use by the people currently working on Allegro. Please send code contributions to this list rather than directly to me (Shawn Hargreaves), because this will allow Allegro development to continue even if I'm not around or am busy with something else at the moment.
Andreas Kluge wrote a driver for Ensoniq Soundscape cards.
More localisation: Swedish message translation by Sven Sandberg, Anton Ragnarsson, and Erik Sandberg, Finnish message translation by Antti Haapala, and Russian message translation and keyboard mapping by Dmitriy Kazimirow.
The midi_out() function now correctly updates the pan/volume/bend controller status.
Kester Maddock added a Wingman Warrior joystick driver.
Fixed some problems with the Sidewinder, Gamepad Pro, and SNES joypad drivers.
Changed the SB16 driver to use signed 16 bit output mode, rather than the previous unsigned format. Hopefully this will improve compatibility with crappy clone hardware.
Added a new WARNMODE environment switch to the makefile. Allegro developers should all set this to get strict warnings, but it will be left off by default so that the distributed version will be more forgiving about different compiler/libc versions.
Fixed problem with reading the top and left positions on digital joystick devices.
Fixed (I think, still waiting accurate confirmation on this one :-) problem with timers running too fast on some motherboards.
Fixed stupid bug where get_align_matrix() wasn't bothering to zero the translation vector.
Fixed stupid bug where rotated sprites were coming out upside down in mode-X and hi/truecolor modes.
Fixed bug where dat utility was truncating long filenames to 8.3 format.
Renamed the ChangeLog file to CHANGES, to avoid problems on 8.3 systems.
Various other minor bugfixes.

Changes from 3.0 to 3.1 (Jan 1999)

Changes between the 3.1 beta and final releases: assorted bugfixes, Antoine Mathys added a Swiss keyboard mapping, Thomas Wolf added a German translation of the system messages.
Changes between the 3.1 alpha and beta releases: assorted bugfixes, FLIC routines can now read from datafiles, included rotation optimisations by Ivan Baldo.
Peter Cech added support for hot-swapping between a custom keyboard layout and the standard US mapping.
Neil Townsend improved the accuracy of the timer routines.
Added an ex40 example program, showing one way to do colored lighting effects in a hicolor mode (and also because it makes the total number of examples a nice round number :-)
Added an afinfo test program, which does the same thing as vesainfo but for VBE/AF drivers.
Michael Bukin made a lot more portability patches and some bug fixes, including some improvements to the FLIC player and a much more rational filename handling system.
Removed the chipset-specific SVGA hardware drivers from the main library distribution. Instead, these will now be available both as an optional addon package, and reformatted as part of the FreeBE/AF project.
Added FreeBE/AF extensions support to the Allegro VBE/AF driver (farptr access to video memory, and the libc and pmode exports needed for future compatibility with the SciTech Nucleus drivers).
Fixed a bug with the patterned and translucent vline() function in 15 bit color depths.
Fixed a NULL pointer dereference bug in the config routines.
Fixed an order of processing bug that was causing data to be lost when calling set_config_file() with the same filename as the current config.
Stepan Roh added a Czech translation of the system messages.
Ole Laursen added a Danish translation of the system messages.
Grzegorz Ludorowski made a new demo game intro animation.
Calin Andrian added 3d polygon timing routines to test.exe.
Peter Cech added grabber support for the 8x8 BIOS font format.
Stepan Roh added a Czech keyboard mapping.
Renamed the Spanish language translation file from SP to ES.
Calin Andrian added a complete set of truecolor polygon rendering routines, with support for MMX and 3DNow! optimisations and a new masked lit drawing mode, along with a new polygon clipping function. One minor change is that POLYTYPE_FLAT mode is now implemented by calling hline(), so it will respond to the current drawing_mode() settings.
Changed the graphics/sound/joystick driver ID numbers from a zero based list to a descriptive 4-character string, to make them more readable and flexible. Added config functions to read/write data in this format. The sound config data is backwardly compatible, but you will need to manually update any graphics or joystick driver numbers that are stored in your config files.
Michael Bukin contributed a _lot_ of patches to improve the portability and robustness of pretty much the entire library. The only externally visible change is that the macros used for declaring hardware driver lists have been redesigned to use a more portable syntax, although the old syntax is still available as a compatibility macro.
Burton Radons did some more optimisation of the truecolor pixel blending functions.
Martijn Versteegh added a hook mechanism for extending the config file system, which can be used to provide extended system status information or customisation routines for addon packages.
Redesigned the grabber and dat utilities to support source-code "plugin" modules, which can be used to extend the system with additional object types, import/export routines, and menu commands.
Ivan Baldo added a dithering option to the 15/16 bit color conversion routines.
Kerry High added a SNES joypad driver.
Added a font override to the d_text_proc() and d_ctext_proc() GUI objects, using the dp2 field to specify a custom font.
Michael Tanczos fixed some bugs in the FLIC player.
Cloud Wu optimised the truecolor pixel blending functions.
Paul Pinault added a French translation of the system error messages.
Grzegorz Adam Hankiewicz added a Spanish translation of the system error messages, and added a new (but undocumented :-) command line option to the demo game.
Fixed clicks in the interpolated sample mixing.
Fixed a bug with position_mouse() not updating the mouse_pos variable.
Fixed a bug in mode-X horizontal scrolling while the timer retrace simulator is active.
Added a language.dat file, which can be used to provide translated versions of system strings (eg. error messages), in a similar way to the existing keyboard.dat. If you want to use this mechanism from your own code, replace all your constant strings with calls to get_config_text("string"). This allows them to be translated by including a line of the form "string=foreignstring" in the relevant section of language.dat.
Added an ASCII name field to the keyboard mapping files, in order to make the setup program a bit more friendly.
Increased the maximum number of sound channels from 32 to 64.
Modified the DIGMID patch loader to support 16 bit samples, rather than just reducing everything to 8 bit.
Added an interpolation option to the sample mixer (quality=2).
Salvador Eduardo Tropea added support for proper 16 bit sample mixing (quality=1).
Lee Killough added a lower level hook routine to the keyboard handler.
Removed floating point code from the DIGMID driver, to avoid potential FPU stack overflows.
Jim Flynn removed floating point calculations from the AWE32 MIDI driver (these could sometimes cause stack overflows).
Salvador Eduardo Tropea improved the datafile system to avoid linking of unused code.
Romano Signorelli contributed a Bresenham arc plotting function.
Thomas Wolf corrected some errors in the German keyboard mapping file.
Grzegorz Adam Hankiewicz improved the ex39 example program.
Sven Sandberg optimised the fixed point trig routines.
Fixed some silly crash bugs in the joystick code.
Added a "compress" target to the makefile, based on a suggestion by Grzegorz Adam Hankiewicz.
Added dummy bitmap acquire/release functions to allegro.h, for compatibility with the Windows version.
Added a cross-reference facility to the Info format documentation.
Martin Fuller fixed an obscure bug in the reading of compressed .bmp files.
The emergency exit signal handler now correctly restores the previous handler, rather than resetting to the default action.
Sven Sandberg optimised the create_light_table() function.
George Foot fixed a bug when the get_mouse_mickeys() routine was called with both parameters pointing to the same value.
Changed the licensing terms from "swapware" to "giftware". See the Allegro website for an explanation of the reasons for this change.
Added yet more overloaded operators (this time for long and double types) to the fix class.
Marius Fodor added support for the Sidewinder and Gravis GamePad Pro. Many apologies for my taking so long to merge in this code!
Stefan Schimanski optimised the reverse blitting routine (for overlapping images).
Added a shift+tab reverse focus movement key to the GUI routines.
Grzegorz Hankiewicz added a new example showing how to create and use a custom color mapping table.
Totally revamped the joystick system (better API and new driver structure).
Modified the fix class to work properly with gcc 2.8.0.
Added a help.txt "how to get tech support" file.
The midi_pos variable is now negated, rather than cleared to -1, at the end of a MIDI file. This can be used for measuring the length of a file.
Added a rendering hook to the font structure, for use by text addon packages.
Improved the VBE/AF text output routine.
Corrected an error in the way the VBE/AF driver interprets hardware cursor colors.
Pedro Cardoso contributed a tweaked 80x80 VGA mode.
The VBE/AF driver now supports dumb framebuffer drivers as well as accelerated ones.
Added more accelerator support to the VBE/AF driver (hardware cursors, lines, vertical lines, triangles, fixed width text output, and opaque/masked blitting from system memory to the screen).
Added a scare_mouse() function, based on ideas by Martijn Versteegh.
The grabber now stores the "grab from grid" dialog state in allegro.cfg.
Sven Sandberg fixed a problem with save_bitmap() widths being rounded upwards.
Made the _timer_installed flag globally visible.
Ove Kaaven added linear framebuffer support to the native mach64 driver.
Erik Sandberg optimised the 8 bit draw_sprite() and draw_trans_sprite() functions.
Michal Mertl fixed a memory leak in the generate_optimized_palette() function.
Added an ALLEGRO_DATE version define to allegro.h.
Michael Bukin optimised the line drawing routine and fixed problem with the inline asm constraints for fadd()/fsub().
Fixed potential problems caused by a lag between the mouse state variables changing and the pointer being redrawn.
Michal Mertl optimised the clipping code for lines, rectangles, and circles.
Maiolino Carmelo contributed an Italian keyboard mapping.
Fixed lockup problems caused by the keyboard LED functions on some platforms/hardware.
Added new create_video_bitmap() and show_video_bitmap() functions.
Added a profile option to the test program.
The keyboard handler now correctly updates the BIOS state for the right control and alt keys when it shuts down.
Fixed a problem that was preventing the DIGMID driver from reading patch sets stored in executable appended datafiles.
Changed the default sample priority from 255 to 128.
Fixed some problems with virtual screen sizes in the VBE/AF driver.
Added two new example programs.
The VBE/AF driver now has full support for hardware accelerated drawing.
Added VBE 3.0 support, including new triple buffering routines.
Wrote a routine to select the sound input source (microphone, line input or CD audio).
Added proper support for stereo samples. This requires an extra parameter to the play_audio_stream() function, so you will need to change any programs that use this. I'm very sorry for breaking your old code!
Fixed bugs with the SB16 autodetection and 16 bit sample recording.
Added input support to the raw SB MIDI interface driver.
Wrote a new test program to demonstrate the audio input features.
Ove Kaaven added support for MIDI and audio (sampled sound) input.
The pack_fopen() function now understands nested datafiles as directory structures, using filenames like "graphics.dat#level1/sprites/zdurgle".
Charles Mac Donald showed me how to set a 160x120 VGA mode, and more reliable 400x* mode-X resolutions.
Guilherme Silveira and Theuzifan Sumachingun both independently modified the file selector to only list valid drive letters.
Carsten Sorensen added a driver for the ESS AudioDrive soundcard.
Przemek Podsiadly added hicolor versions of the 3d polygon routines.
Ove Kaaven added truecolor support to the native ATI mach64 driver.
Patrick Hogan added a draw_gouraud_sprite() function.
Ben Chauveau added a driver for Tseng ET6000 cards.
Marco Campinoti added truecolor support to the native Tseng ET4000 driver.
Marco Marmulla added 16 bit support to the load_voc() routine.
Added Danish, Swedish, and Norwegian keyboard mappings.
Added GUI hook functions for scaling or offsetting the mouse position.
Fixed bug which was causing a lockup when calling set_leds(-1).
Michael Bevin optimised the create_trans_table() function.
It is now possible to display a mouse pointer without the mouse handler needing to be installed.
Added a create_sample() function.
Made the _blender_map pixel blending functions and the _mouse_installed, _keyboard_installed, and _sound_installed flags globally visible.
Added an 8-button joystick mode.
Chris La Mantia fixed a minor visual problem with the d_icon_proc().
Added a Rich Text Format (.rtf) version of the documentation.
Added postfix increment and decrement operators to the C++ fix class, and the unary negation operator is now const-correct.

Changes from 3.0 beta to release (Dec 1997)

The pat2dat utility can now import instruments from AWE32 SoundFont files.
Optimised the DIGMID patch loader and fixed a couple of bugs.
Ove Kaaven fixed the ATI mach64 driver.
The config file can now mention several possible video drivers, using lines in the form gfx_driver=x, gfx_driver2=x, etc.
Improved the native SVGA driver helper functions, making it easier to add truecolor support to the register level drivers.
Double-clicking on a font object in the grabber now allows you to view the extended characters as well as normal ASCII.
Markus Oberhumer corrected a potential problem with the Video-7 initialisation code.
Markus Oberhumer, Bitland, and Sormuras all sent me mapping tables for the German keyboard layout. Coordination of effort: who needs it? :-)
Mathieu Lafon improved the French keyboard mapping.
Fixed some bugs in the MIDI voice allocation system.
Added a -k (keep names) option to the dat utility.
The setup program now uses the ALLEGRO environment variable to locate the keyboard.dat file.
Fixed a problem with < and > characters in the HTML documentation.

Changes from 2.2 to 3.0 beta (Nov 1997)

Merged in George's improved instrument parameters for the AWE32 driver.
The pat2dat utility can now reduce sample data from 16 to 8 bits (saves space, and the DIGMID driver only uses 8 bits in any case).
Added yet another version of the mouse handler, this time in an attempt to make it work more reliably under Windows NT.
Frodo Baggins added a mapping table for Portuguese keyboards.
Added an external tool "shell" function to the grabber.
Added a "box grab" function to the grabber, which uses a color #255 bounding box to determine the extent of the sprite to grab.
Santeri Saarimaa added a Finnish keyboard mapping.
Finished writing the pat2dat utility, and the DIGMID driver is working a lot better now.
Mathieu Lafon added support for the Pause and PrtScr keys, and changed the key[] array to a bitfield indicating whether either or both of the normal and extended versions of the key are pressed. This remains compatible with the "if (key[KEY_*])" syntax, but also allows you to distinguish between, for example, the Enter key on the numeric pad and the one next to the right shift key.
Fixed a bug in the handling of config variables that don't belong to any section.
The makefile now tries to detect and warn people about some of the more common installation errors.
The HTML version of the documentation now uses a short .htm file extension if it is built on a system with LFN disabled.
Keyboard mapping files now only bother saving the entries that differ from the default US mapping. This makes the maps a great deal smaller!
Changed the default font and keyboard mapping tables from DOS codepage 437 to the standard ISO charset (first part of Unicode). If you have made a keyboard config using the old codepage it will need to be updated, but don't worry, I have a script that can do this very easily.
Fixed a bug in the detection of font formats (fixed or proportional) when grabbing from a bitmap font.
Added an editable loop point to the MIDI player (thanks to George for sorting out how to do this...)
Rewrote the mouse handler to track the position itself, using only the mickey counters from the int 0x33 driver. Hopefully this will fix the problem with buggy Logitech drivers...
Added a mouse_pos variable containing both the X and Y values in one 32 bit location, to allow a single instruction read during tight polling loops.
The grabber now supports multiple selection, and has a new "ungrab" command that copies from a bitmap object into the scratch buffer (you can use this to generate palettes from truecolor images, or to re-grab a smaller area from the image).
Added multiple selection abilities to the GUI listbox object.
Theuzifan improved the cpu detection for Cyrix chips.
Mathieu Lafon added a French keyboard mapping.
Richard Mitton wrote an example program demonstrating how to fake a 12 bit truecolor display on an 8 bit card.
Michal Mertl added a routine for generating optimised palettes for a specific truecolor image.
Optimised the getr/g/b() functions. Converting between different color depths should be much faster now...
Scott Harrison added code to detect OpenDOS, and use the i_love_bill mode if their version of EMM386 is in use.
Added some new example programs.
The makedoc utility now converts between the DOS and Windows extended character sets when producing HTML output files.
Ettore Perazzoli made a spectacular optimisation to the linear -> mode-X blitting function.
Added a grid option to the dat utility, to specify which region of a bitmap you want to grab.
Fixed a bug in blitting truecolor bitmaps onto mode-X destinations.
Fixed a bug that was preventing the Adlib volume from being changed when only MIDI sound drivers were installed.
The grabber can now be run in video modes other than 640x480 (it doesn't look very nice in lower resolutions, though :-)
Added a new fake scancode for the extended / key (the one on the numeric keypad) so that the two keys can be distinguished from each other.
Joaquin Hierro Diaz made a mapping table for Spanish keyboards.
The setup utility can now be used to select a keyboard layout and to calibrate the joystick, as well as for the sound hardware.
Moved some of the documentation to different locations, so hopefully people will now be less likely to miss the faq.txt, and to bring it closer in line with the standard GNU distribution format.
Better keyboard configuration system. There is now a proper utility for setting up the mapping tables, the tables can be read from external files, and it properly supports the alt-gr and accent escape keys.
Menu items can now be disabled, have check marks next to them, and support right aligned text eg. for displaying keyboard shortcuts, there is a new "void *dp" field in the menu structure, and the click callback routines can now use the global pointer "active_menu" to determine which option they were called by, if a single routine is shared by several menu items.
Peter Palotas added an input callback to the keyboard routines, and event flags to the mouse callback.
Added a -pal option to the dat utility.
Grzegorz Ludorowski made some new graphics for the demo game.
Moved some code to new files and added a bunch of macros so you can remove unused graphics and sound drivers at link time.
Fabian Nunez added support for the Logitech Wingman Extreme joystick.
Chris La Mantia contributed a d_slider_proc() dialog object.
Sean Gugler added a routine for changing the keyboard LED state.
George Foot added pause and seek functions to the MIDI player.
Added the ability to append datafiles (in fact any files at all) onto the end of your program executable.
Merged in the AWE32 driver. Long live George!
Can now read RLE compressed TGA files.
Added a mouse movement callback function (useful for detecting double click events).
Stefan Eilert added support for dual joysticks.
Seymour Shlien contributed a routine for drawing justified text.
Krzysztof Krzyzaniak contributed a loader for .VOC sample files.
Added a rotate_scaled_sprite() function.
Now supports the Dvorak keyboard layout.
Salvador Eduardo Tropea added a 320x100 VGA mode.
Implemented translucent and lit sprite and RLE sprite drawing functions for the truecolor modes.
Updated the sound setup utility.
The dat utility can now output makefile dependencies for automatically rebuilding the file when any of the source data changes.
Fixed some problems with the RGB <-> HSV conversion functions.
Truecolor image loading and grabber support.
Phil Frisbie provided some code to detect the CPU type.
Michal Mertl added 24 bit graphics modes. Hurrah!
Added functions for playing streams of digital audio data.
Chris La Mantia contributed a bitmap icon GUI object.
Doug Eleveld added a text box GUI object, plus an improved help system for the grabber.
Added support for UK and AZERTY keyboard layouts. More can easily be added if you send me the appropriate scancode->ASCII mapping tables...
Added get_align_matrix(), qtranslate_matrix(), and qscale_matrix() functions.
Added a draw_character() function for using sprites as monochrome pixel masks.
It is now safe to pass the same matrix as both input and output to the matrix_mul() function.
Paul Bartrum contributed some ellipse drawing functions.
Added some callbacks to the MIDI driver, allowing you to hook your own code into MIDI notes or marker events.
Added a function to measure mouse movement in terms of mickeys (difference since the last call) as well as in absolute screen coordinates.
VolkerOth made the d_edit_proc objects able to scroll, if the string is larger than the available space.
Added the ability to distinguish between the left and right Control and Alt keys.
Fabian Nunez added support for the extra keys on a Microsoft keyboard.
Added void *dp2 and void *dp3 fields to the dialog structure. This ought not to break any existing code, but will let you store a lot more data when creating custom objects.
The packfile functions can now directly open and read from datafile member objects, using fake filenames in the form "filename.dat#obj_name". This means that all the Allegro file access routines (eg. load_pcx() and set_config_file()) can now read from datafile objects as well as separate files.
Added miditest and digitest programs to allow more rigorous testing of the sound routines and patch sets, and a vesainfo program to check which video modes are available on any given card.
Jan Hubicka wrote a faster version of create_rgb_table().
The grabber now scales the bitmap preview if the image is too large to fit onto the screen.
Jorrit Rouwe provided a new and much cooler set of FM instrument definitions for the Adlib MIDI driver.
Added a function to load .IBK patch sets for use by the Adlib driver.
Added a wrapper allegro/ directory around the contents of the zip file, so it can now be safely unzipped into the main djgpp directory.
Richard Mitton added support for 6-button joysticks.
Truecolor (15, 16, and 32 bit) graphics modes.
Vastly improved sound routines (more flexible API, now supports up to 32 simultaneous voices on the SB, sample-based MIDI playback driver, can reverse samples, volume/pan/pitch sweep effects, MIDI commands can be output on the fly as well as played from MIDI files, and lots of other goodies).
It is now possible to update the status of GUI dialogs incrementally from your own control loops, with an update_dialog() function, rather than completely transferring control to do_dialog().
Compressed files (including grabber datafiles) can now be encypted with a password.
Added a masked_blit() function, that skips zero pixels.
Added code to detect being run under Linux DOSEMU, and use the less demanding version of the timer code if this is the case.
Added a standardised configuration mechanism. The format for saved joystick calibration information has changed, so existing joystick files are no longer valid.
Added a textprintf() routine, which uses a printf() style format string.
Added a TexInfo version of the documentation (thanks for the help, Francois!)
Jonas Petersen added a save_bmp() function, and support for the OS/2 BMP format.

Changes from 2.11 to 2.2 (Feb 1997)

TBD/FeR added tweaked 320x600 and 360x600 resolutions to the mode-X driver.
Matthew Bowie added support for 4-button joysticks.
Dave Thomson added RGB <-> HSV conversion functions.
Added a 'freeze_mouse_flag' variable, that can be used to lock the pointer to a specific position.
Added a 'key_led_flag' variable, that can be used to prevent the keyboard LED's updating in response to the capslock, numlock, and scroll-lock keys.
The midi player now resets midi_pos to -1 when the music finishes playing.
Adrian Oboroc wrote an LBM loader.
Fonts can now contain characters above ASCII 127.
Chris Wigman made a better intro animation for the demo game.
Added translucency, color blending, and lighting routines (based on code by Owen Embury and ideas by Nathan Albury).
Added 3d math and matrix manipulation functions.
Added texture mapped and gouraud shaded polygon drawers.
Tim Gunn contributed code for reading and writing TGA files.
Fixed clamping problems with rotating non-circular sprites.
Added scrollbars to the GUI listbox object.
Seymour Shlien wrote a bezier spline drawing function.
Added fixed point fadd() and fsub() functions, which check for overflow.
Added pack_fseek() and chunk manipulation functions to the file routines.
Improved datafile structure and grabber program.
Wrote a utility to convert grabber datafiles into linkable asm code.
Salvador Eduardo Tropea improved the keyboard routines (better handling of extended scancodes, keyboard LED support, capslock and numlock, and alt+numpad input).
Fixed the packfile functions and file selector to work with long filenames under win95.
Seymour Shlien contributed a BMP reader.
Added a hook function to the keyboard code, allowing you to use the GUI code without installing the keyboard handler.
Fixed a lockup caused by trying to access non-existent floppy drives.
Francois Charton wrote a driver for Paradise graphics cards.
Chris La Mantia contributed a radio button GUI dialog object and added a D_DISABLED object flag.
Markus F.X.J. Oberhumer fixed the Video-7 scrolling function.
Converted the docs into HTML format.
Added code to detect Windows NT.
Mark Habersack added support for newer Trident chipsets.
Did some more work on the VBE/AF driver (it now works, but still doesn't support accelerated hardware features).
Fixed bugs in the WAV sample reader and FLIC player.
Added special 'windows friendly' mode to the timer code. You can now even run demo.exe under Windows 3.1!
Reorganised directory structure, to allow for a Linux version. The output liballeg.a is now found in lib/djgpp.
Added support for 8x16 BIOS format fonts.
Fixed a problem with overflow when rotating large sprites.
Fixed a problem with restoring the text mode screen height after running Allegro programs.

Changes from 2.1 to 2.11 (Nov 1996)

Fixed bug in bank.S.
install_mouse() now sets the range to (0,0,SCREEN_W,SCREEN_H).
install_sound() does not automatically set the volume to maximum.
Added ++ and -- operators to class fix.
Makefile now copies liballeg.a to lib, and allegro.h to include.
Made a few changes to work under LFN=y (if you use unzip or winzip instead of pkunzip).
Added manifest.
Clarified installation instructions.

Changes from 2.0 to 2.1 (June 1996)

Mode-X support (thanks to Jonathan Tarbox and Dominique Biesmans for suggesting and then helping to implement this).
Compiled sprites.
Jonathan Tarbox contributed an FLI/FLC player.
Added patterned drawing modes.
Added a vertical retrace interrupt simulator.
polygon() can now handle concave and self-intersecting shapes. I also changed the parameters a bit. Sorry if this breaks your old code, but it's more efficient the new way...
Added stretch_sprite().
Wrote a floodfill() routine.
More flexible palette fade routines.
Added set_volume() to the sound code.
David Calvin wrote a sound setup utility.
Improved the GUI. Added popup/dropdown menus, joystick input, three button alert boxes, better handling of arrow key focus movement, a new keyboard shortcut object (d_keyboard_proc()), and '&' markers in strings to display keyboard shortcuts. The GUI can also now be used with fonts other than the standard 8x8 default, by altering the global 'font' pointer.
Fabian Nunez added support for the CH Flightstick Pro joystick (looks cool: I want one :-) and 3-button mice.
The keyboard handler now responds to the state of the ctrl and alt keys, and there is a new simulate_keypress() function.
Mark Wodrich added sub-bitmaps, which share their memory with a parent bitmap but can be positioned anywhere within it, and have their own clipping rectangles.
Mark also modified the mouse driver to double-buffer the pointer (so it doesn't flicker any more), and added a set_mouse_sprite_focus() function.
Added set_mouse_range() and set_mouse_speed() functions.
Thanks (again) to Mark Wodrich, the grabber can now import GRX .FNT files.
The grabber can now make backups when saving datafiles, and it only writes the datafile headers if their contents have changed, to prevent unnecessary recompilation.
Added a text_height() function.
The fixed point inverse sin and inverse cos functions now use lookup tables, which makes them a lot faster.
Reorganised the directory structure, added some example programs, and improved the documentation.

Changes from 2.0 beta to release (March 1996)

Marcel de Kogel fixed some problems with the MPU-401 driver. It now actually works :-)
Marcel also provided some better drum sounds for the Adlib driver.
Inlined the fmul() and fdiv() functions.
Much faster fsqrt(), taken from Arne Steinarson's fix-float library.
Added inline bmp_write_line(), bmp_read_line(), and _putpixel() functions.
The keyboard routines now support the emergency abort sequence ctrl+alt+del, and there are signal handlers to make sure Allegro will shut down cleanly if your program crashes.
Wrote new irq wrappers that can deal with reentrant interrupts.
Added joystick routines (based on code provided by Jonathan Tarbox and Marcel de Kogel).
Moved some functions to different files and juggled things about so the linker can do a better job. If you don't use the sound stuff, or don't use any graphics functions, now they won't be linked into your executable.
Marcel de Kogel manged to locate my (embarrassingly stupid :-) mistake which was preventing the VESA 2.0 linear framebuffer driver from working.
Various other performance enhancements and bug fixes.

Changes from 1.x to 2.0 beta (Jan/Feb 1996)

Dropped all the Borland code. A couple of months ago I ran out of disk space, and it was with great satisfaction the I executed the command 'deltree /y c:\bc4'. It was a horrible compiler, and I'm glad it's dead.
Added SVGA support. As a result it no longer makes sense for allegro_init() to put the system into mode 13h, so you will be in text mode until you call set_gfx_mode().
Added sound code (background MIDI music and sample mixing).
Added support for proportional fonts (of any size) as well as the old 8x8 fixed size ones.
XOR drawing mode.
There is no longer such a thing as a SPRITE structure. The sprite drawing code now draws bitmaps onto other bitmaps, which is a much more flexible way of doing things. The datafile reader will convert all your old sprites to bitmaps as it loads them in, so the only practical difference this is likely to make is that the sprite drawing routines can't draw opaque sprites any more (but you can use a blit instead).
show() and get_sprite() no longer exist: use blit() instead.
Added flipped and rotated sprite draw routines.
Added bitmap scaling.
Added RLE sprites.
drawsprite() has been renamed to draw_sprite().
textmode() has been renamed to text_mode(), to avoid conflicts with definitions in conio.h.
All the file access functions have been renamed from the stdio syntax to pack_fopen(), pack_getc(), etc, so they can now be mixed with stdio code.
Added pack_fgets() and pack_fputs().
The port_callback pointer no longer exists.
Removed polyline() (who ever used it?), and added a polygon(), which draws a filled convex polygon with an arbitrary number of vertices.
Added do_line() and do_circle() functions, which call a user-supplied function for each pixel that needs to be drawn.
Added a default keyboard interface to the GUI routines, allowing the selection of objects with the arrow keys and <enter>.
Added several new GUI messages and flags. In particular there are now messages for tracking mouse cursor movement, an idle message, a special return value for the MSG_CHAR message which allows an object to override the default keyboard handling, and a flag which hides the object.
There are new GUI routines to centre a dialog on the screen and to alter the colors used by the standard alert and file selector dialogs.
The file selector now takes a third parameter specifying which file extensions to display.
The timer routines now have better than millisecond accuracy, and it is possible to alter the speed of a user timer callback in realtime (by reinstalling it with a different speed value).
Removed the _RGB struct and paltorgb() functions. RGB's are now stored directly in the hardware format, with each value in the range 0-63.
Added functions to get and set single palette entries as well as entire palettes.
Added DPMI memory locking code.
Wrote a C++ 'fix' class which overloads a lot of operators, providing an easy way to use the fixed point routines.
There are probably lots of other things that I have forgotten about.