author Cameron Cawley <ccawley2011@gmail.com>
Tue, 03 Sep 2019 23:11:10 +0300
changeset 13054 d07097a0e57e
parent 13051 08ae4fcfa2e3
child 13055 2641390846e1
permissions -rw-r--r--
riscos: implement SDL_WM_IconifyWindow()
     2 This is a list of API changes in SDL's version history.
     4 Version 1.0:
     6 1.2.16:  This is mostly multiple bug fixes since the previous version.
     7 Changes include:
     8 - Audio, wav loader: security fixes for ADPCM decoding (CVE-2019-7572,
     9   CVE-2019-7573, CVE-2019-7574, CVE-2019-7575, CVE-2019-7576,
    10   CVE-2019-7577, CVE-2019-7578 -- bugs 4490, 4491, 4492, 4493, 4494,
    11   4495, 4496, and 4522.)
    12 - Video, bmp loader:  security fixes for CVE-2019-7635, CVE-2019-7636,
    13   CVE-2019-7638, CVE-2019-13616 (bugs 4498, 4499, 4500, 4517 and 4538.)
    14 - Video, blit: fix handling of alpha channel in Altivec accelerated
    15   blit functions (bug 1424.)
    16 - Video, blit: use fast path for RGB 565 -> 32-bit XRGB 8888
    17 - Video, blit: fix RGBA<->RGBA blit broken with the optimization from
    18   bug 11 (bug 2976.)
    19 - Video: fix integer overflow in SDL_CalculatePitch (CVE-2019-7637,
    20   bug 4497.)
    21 - Mouse: fix SDL_ResetMouse() using a bogus mouse button causing a
    22   negative shift (bug 3593.)
    23 - Cdrom: fix SDL_CDResume() and SDL_CDStop() not returning failure
    24   when they should (bug 4108.)
    25 - Unix, pthread: Fix SDL_SemWaitTimeout() returning -1 instead of
    26   SDL_MUTEX_TIMEDOUT upon timeout (bug 1426.)
    27 - NetBSD: wscons support.
    28 - NetBSD, audio: use AUDIO_GETBUFINFO when available.
    29 - OpenBSD, audio: add sndio support.
    30 - Haiku/BeOS, audio: fix error in buffer size setting (bug 1679.)
    31 - OpenBSD: fix dynamic loading of X libs (bug 1434.)
    32 - X11video: fix missing symbol X11_KeyToUnicode in .so file (bug 1390.
    33   not being an official SDL function, the use of X11_KeyToUnicode() is
    34   strongly discouraged.)
    35 - X11video: fix compilation with libX11 >= (bug 1769.)
    36 - X11video: fix for XChangeProperty() crash (bug 1427.)
    37 - X11video: fix SDL_EnableUNICODE sometimes dropping keyboard events
    38   completely (bug 2325.)
    39 - X11video: fix no SDL_VIDEORESIZE event being generated when the
    40   window manager sets the window size (bug 1859.)
    41 - X11video: fix X11_SetGammaRamp not checking the return value of
    42   XStoreColors (bugs 1979, 3770.)
    43 - X11video: fix SDL_VIDEORESIZE events not received when resizing
    44   window from the corner (inverted logic in X11 ConfigureNotify, i.e.
    45   resize handling - bug 1430.)
    46 - X11video: unblock SDL_WM_GrabInput() GrabNotViewable case (bug 1155.)
    47 - Mac OS X: fix crash on any input in Quartz code (bug 2560.)
    48 - Mac OS X: fix crash in Quartz gamma ramp code.
    49 - Mac OS X: fix build for 10.9 Mavericks or newer (bug 2085.)
    50 - Mac OS X, Quartz: fix cursor transparency (bug 4076.)
    51 - Mac OS X, joystick: update to support Saitek p2500 gamepad (bug 2025)
    52 - Mac OS X, main: updates for -psn_XXX command line arg for Finder
    53   launches in new macOS versions.
    54 - Mac OS X, main: replace deprecated CPS apis in new OSX versions
    55   (bug 4114.)
    56 - Windows, video: fix other window positions/sizes when exiting
    57   fullscreen (bug 3315.)
    58 - Windows, keyboard: reset deadkeys upon SDL_EnableUNICODE() or upon
    59   quit (bug 3332.)
    60 - Windows: Visual Studio project file updates.
    61 - OS/2: Watcom makefile updates.
    62 - FreeBSD, joystick: compile fixes.
    63 - BSD, joystick: increase the number of uhid devices to scan (bug 1561)
    64 - Linux, evdev: ignore joystick axis events if they aren't in a sane
    65   range.
    66 - Linux, joystick: fix Dualshock 3's motion sensors overwrite analog
    67   stick: protect against any axis that isn't reported by EVIOCGBIT but
    68   still sending EV_ABS events (bug 3193.)
    69 - FreeBSD, cdrom: fix CDROM detection misbehaviour for 7.x and newer
    70   (bug 1529.)
    71 - Solaris, audio: fix pulseaudio dynamic linking.
    72 - Solaris, cpuinfo: fix asm syntax error causing build failures.
    73 - Atari: multiple platform code updates.
    74 - RISC OS: cleanups to platform code.
    75 - RISC OS: fix thread starvation in fullscreen mode.
    76 - RISC OS: fix returning from full-screen to 16M colour modes.
    77 - RISC OS: fix receiving PreQuit messages.
    78 - RISC OS: ensure the window size is consistent at different DPIs.
    79 - RISC OS, video: add support for more pixel formats.
    80 - RISC OS: mouse fixes. restore mouse palette when exiting while mouse
    81   is in focus. don't reset mouse focus when recreating the window.
    82 - RISC OS: support Windows and Menu key input.
    83 - RISC OS: implement SDL_WM_IconifyWindow()
    84 - Configuration: fix library detection selecting wrong lib (bug 2795.)
    85 - Configuration: fix detecting dynamic library support on powerpc64le
    86   (bug 3481.)
    87 - SDL error: string formatting fixes to deal with nasty corner cases
    88   (bug 2049.)
    89 - SDL_error: handle %lu, %li and %ld in format string (bug 3739.)
    90 - stdlib: updated SDL_qsort() code.
    91 - stdlib: use _strtoi64() and _strtoui64() when available for windows.
    92 - headers, close_code.h: fix unbalanced #pragma pack(pop) for watcom
    93   builds (bug 3781.)
    94 - headers, begin_code.h, close_code.h: updates to SDLCALL and DECLSPEC
    95   macros for OS/2.
    96 - headers, endian: add Watcom inline asm for SDL_Swap16 and SDL_Swap32
    97 - headers, config: updates to default windows and os2 config files.
    98 - headers, SDL_syswm.h, SDL_stdinc.h: include system headers before
    99   packing alignment changes (bug 4149.)
   102 1.2.15:  This is a minor bug fix release:
   104 General Notes:
   105 - Fixed assembly register clobbering in CPU info routines.
   106 - Fixed memory stomp when using stretch blit on large images.
   107 - Fixed pixel corruption with overlapping blits.
   108 - SDL_JOYSTICK_DEVICE can be a colon separated list of joystick devices.
   109 - Disabled MMX blitters since they don't compile on modern compilers.
   111 Unix Notes:
   112 - Fixed crash in joystick code on newer Linux kernels.
   113 - Fixed channel swizzling for ALSA target with 6-channel output.
   114 - Use the OpenGL GLX_EXT_swap_control extension if available.
   115 - XRandR support is disabled by default because it causes desktop
   116   reconfiguring. It can be enabled with the SDL_VIDEO_X11_XRANDR=1
   117   environment variable.
   119 Windows Notes:
   120 - Fixed SDL_GL_ACCELERATED_VISUAL handling.
   121 - Fixed application state handling with ALT-Tab.
   122 - Fixed occasional crash handling WM_ACTIVATEAPP in Direct X code.
   123 - Fixed UTF-8 decoding of Russian characters.
   125 Mac OS X Notes:
   126 - Fixed building and running on Mac OS X 10.7 (Lion).
   129 1.2.14:
   130 	Added cast macros for correct usage with C++:
   131 		SDL_reinterpret_cast(type, expression)
   132 		SDL_static_cast(type, expression)
   134 	Added SDL_VIDEO_FULLSCREEN_DISPLAY as a preferred synonym for 
   137 	Added SDL_DISABLE_LOCK_KEYS environment variable to enable normal
   138 	up/down events for Caps-Lock and Num-Lock keys.
   140 1.2.13:
   141 	Added SDL_BUTTON_X1 and SDL_BUTTON_X2 constants.
   143 1.2.12:
   144 	Added SDL_VIDEO_ALLOW_SCREENSAVER to override SDL's disabling
   145 	of the screensaver on Mac OS X and X11.
   147 1.2.10:
   148 	If SDL_OpenAudio() is passed zero for the desired format
   149 	fields, the following environment variables will be used
   150 	to fill them in:
   155 	If an environment variable is not specified, it will be set
   156 	to a reasonable default value.
   158 	Added support for the SDL_VIDEO_FULLSCREEN_HEAD environment
   159 	variable, currently supported on X11 Xinerama configurations.
   161 	Added SDL_GL_SWAP_CONTROL to wait for vsync in OpenGL applications.
   163 	Added SDL_GL_ACCELERATED_VISUAL to guarantee hardware acceleration.
   165 	Added current_w and current_h to the SDL_VideoInfo structure,
   166 	which is set to the desktop resolution during video intialization,
   167 	and then set to the current resolution when a video mode is set.
   169 	SDL_SetVideoMode() now accepts 0 for width or height and will use
   170 	the current video mode (or the desktop mode if no mode has been set.)
   172 	Added SDL_GetKeyRepeat()
   174 	Added SDL_config.h, with defaults for various build environments.
   176 1.2.7:
   177 	Added CPU feature detection functions to SDL_cpuinfo.h:
   178 		SDL_HasRDTSC(), SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE(),
   179 		SDL_HasAltiVec()
   180 	Added function to create RWops from const memory: SDL_RWFromConstMem()
   182 1.2.6:
   183 	Added SDL_LoadObject(), SDL_LoadFunction(), and SDL_UnloadObject()
   187 1.2.5:
   190 	Added SDL_GL_STEREO for stereoscopic OpenGL contexts
   192 1.2.0:
   193 	Added SDL_VIDEOEXPOSE event to signal that the screen needs to
   194 	be redrawn.  This is currently only delivered to OpenGL windows
   195 	on X11, though it may be delivered in the future when the video
   196 	memory is lost under DirectX.
   198 1.1.8:
   199 	You can pass SDL_NOFRAME to SDL_VideoMode() to create a window
   200 	that has no title bar or frame decoration.  Fullscreen video
   201 	modes automatically have this flag set.
   203 	Added a function to query the clipping rectangle for a surface:
   204 		void SDL_GetClipRect(SDL_Surface *surface, SDL_Rect *rect)
   206 	Added a function to query the current event filter:
   207 		SDL_EventFilter SDL_GetEventFilter(void)
   209 	If you pass -1 to SDL_ShowCursor(), it won't change the current
   210 	cursor visibility state, but will still return it.
   212 	SDL_LockSurface() and SDL_UnlockSurface() are recursive, meaning
   213 	you can nest them as deep as you want, as long as each lock call
   214 	has a matching unlock call.  The surface remains locked until the
   215 	last matching unlock call.
   217 	Note that you may not blit to or from a locked surface.
   219 1.1.7:
   220 	The SDL_SetGammaRamp() and SDL_GetGammaRamp() functions now take
   221 	arrays of Uint16 values instead of Uint8 values.  For the most part,
   222 	you can just take your old values and shift them up 8 bits to get
   223 	new correct values for your gamma ramps.
   225 	You can pass SDL_RLEACCEL in flags passed to SDL_ConvertSurface()
   226         and SDL will try to RLE accelerate colorkey and alpha blits in the
   227 	resulting surface.
   229 1.1.6:
   230 	Added a function to return the thread ID of a specific thread:
   231 		Uint32 SDL_GetThreadID(SDL_Thread *thread)
   232 	If 'thread' is NULL, this function returns the id for this thread.
   234 1.1.5:
   235 	The YUV overlay structure has been changed to use an array of
   236 	pitches and pixels representing the planes of a YUV image, to
   237 	better enable hardware acceleration.  The YV12 and IYUV formats
   238 	each have three planes, corresponding to the Y, U, and V portions
   239 	of the image, while packed pixel YUV formats just have one plane.
   241 	For palettized mode (8bpp), the screen colormap is now split in
   242 	a physical and a logical palette. The physical palette determines
   243 	what colours the screen pixels will get when displayed, and the
   244 	logical palette controls the mapping from blits to/from the screen.
   245 	A new function, SDL_SetPalette() has been added to change
   246 	logical and physical palettes separately. SDL_SetColors() works
   247 	just as before, and is equivalent to calling SDL_SetPalette() with
   248 	a flag argument of (SDL_LOGPAL|SDL_PHYSPAL).
   250 	SDL_BlitSurface() no longer modifies the source rectangle, only the
   251 	destination rectangle. The width/height members of the destination
   252 	rectangle are ignored, only the position is used.
   254 	The old source clipping function SDL_SetClipping() has been replaced
   255 	with a more useful function to set the destination clipping rectangle:
   256 		SDL_bool SDL_SetClipRect(SDL_Surface *surface, SDL_Rect *rect)
   258 	Added a function to see what subsystems have been initialized:
   259 		Uint32 SDL_WasInit(Uint32 flags)
   261 	The Big Alpha Flip: SDL now treats alpha as opacity like everybody
   262 	else, and not as transparency:
   264 	A new cpp symbol: SDL_ALPHA_OPAQUE is defined as 255
   265 	A new cpp symbol: SDL_ALPHA_TRANSPARENT is defined as 0
   266 	Values between 0 and 255 vary from fully transparent to fully opaque.
   268 	New functions:
   269 	SDL_DisplayFormatAlpha()
   270 	    Returns a surface converted to a format with alpha-channel
   271 	    that can be blit efficiently to the screen. (In other words,
   272 	    like SDL_DisplayFormat() but the resulting surface has
   273 	    an alpha channel.)  This is useful for surfaces with alpha.
   274 	SDL_MapRGBA()
   275 	    Works as SDL_MapRGB() but takes an additional alpha parameter.
   276 	SDL_GetRGBA()
   277 	    Works as SDL_GetRGB() but also returns the alpha value
   278 	    (SDL_ALPHA_OPAQUE for formats without an alpha channel)
   280 	Both SDL_GetRGB() and SDL_GetRGBA() now always return values in
   281 	the [0..255] interval. Previously, SDL_GetRGB() would return
   282 	(0xf8, 0xfc, 0xf8) for a completely white pixel in RGB565 format.
   283 	(N.B.: This is broken for bit fields < 3 bits.)
   285 	SDL_MapRGB() returns pixels in which the alpha channel is set opaque.
   287 	SDL_SetAlpha() can now be used for both setting the per-surface
   288 	alpha, using the new way of thinking of alpha, and also to enable
   289 	and disable per-pixel alpha blending for surfaces with an alpha
   290 	channel:
   291 		To disable alpha blending:
   292 			SDL_SetAlpha(surface, 0, 0);
   293 		To re-enable alpha blending:
   294 			SDL_SetAlpha(surface, SDL_SRCALPHA, 0);
   295 	Surfaces with an alpha channel have blending enabled by default.
   297 	SDL_SetAlpha() now accepts SDL_RLEACCEL as a flag, which requests
   298 	RLE acceleration of blits, just as like with SDL_SetColorKey().
   299 	This flag can be set for both surfaces with an alpha channel
   300 	and surfaces with an alpha value set by SDL_SetAlpha().
   301 	As always, RLE surfaces must be locked before pixel access is
   302 	allowed, and unlocked before any other SDL operations are done
   303 	on it.
   305 	The blit semantics for surfaces with and without alpha and colorkey
   306 	have now been defined:
   308 	RGBA->RGB:
   309 	    SDL_SRCALPHA set:
   310 		alpha-blend (using alpha-channel).
   311 		SDL_SRCCOLORKEY ignored.
   312 	    SDL_SRCALPHA not set:
   313 		copy RGB.
   314 		if SDL_SRCCOLORKEY set, only copy the pixels matching the
   315 		RGB values of the source colour key, ignoring alpha in the
   316 		comparison.
   318 	RGB->RGBA:
   319 	    SDL_SRCALPHA set:
   320 		alpha-blend (using the source per-surface alpha value);
   321 		set destination alpha to opaque.
   322 	    SDL_SRCALPHA not set:
   323 		copy RGB, set destination alpha to opaque.
   324 	    both:
   325 		if SDL_SRCCOLORKEY set, only copy the pixels matching the
   326 		source colour key.
   328 	RGBA->RGBA:
   329 	    SDL_SRCALPHA set:
   330 		alpha-blend (using the source alpha channel) the RGB values;
   331 		leave destination alpha untouched. [Note: is this correct?]
   332 		SDL_SRCCOLORKEY ignored.
   333 	    SDL_SRCALPHA not set:
   334 		copy all of RGBA to the destination.
   335 		if SDL_SRCCOLORKEY set, only copy the pixels matching the
   336 		RGB values of the source colour key, ignoring alpha in the
   337 		comparison.
   339 	RGB->RGB: 
   340 	    SDL_SRCALPHA set:
   341 		alpha-blend (using the source per-surface alpha value).
   342 	    SDL_SRCALPHA not set:
   343 		copy RGB.
   344 	    both:
   345 		if SDL_SRCCOLORKEY set, only copy the pixels matching the
   346 		source colour key.
   348 	As a special case, blits from surfaces with per-surface alpha
   349 	value of 128 (50% transparency) are optimised and much faster
   350 	than other alpha values. This does not apply to surfaces with
   351 	alpha channels (per-pixel alpha).
   353 	New functions for manipulating the gamma of the display have
   354 	been added:
   355 		int SDL_SetGamma(float red, float green, float blue);
   356 		int SDL_SetGammaRamp(Uint8 *red, Uint8 *green, Uint8 *blue);
   357 		int SDL_GetGammaRamp(Uint8 *red, Uint8 *green, Uint8 *blue);
   358 	Gamma ramps are tables with 256 entries which map the screen color
   359 	components into actually displayed colors.  For an example of
   360 	implementing gamma correction and gamma fades, see test/testgamma.c
   361 	Gamma control is not supported on all hardware.
   363 1.1.4:
   364 	The size of the SDL_CDtrack structure changed from 8 to 12 bytes
   365 	as the size of the length member was extended to 32 bits.
   367         You can now use SDL for 2D blitting with a GL mode by passing the
   368 	SDL_OPENGLBLIT flag to SDL_SetVideoMode().  You can specify 16 or
   369 	32 bpp, and the data in the framebuffer is put into the GL scene
   370 	when you call SDL_UpdateRects(), and the scene will be visible
   371 	when you call SDL_GL_SwapBuffers().
   373 	Run the "testgl" test program with the -logo command line option
   374 	to see an example of this blending of 2D and 3D in SDL.
   376 1.1.3:
   377 	Added SDL_FreeRW() to the API, to complement SDL_AllocRW()
   379 	Added resizable window support - just add SDL_RESIZABLE to the
   380 	SDL_SetVideoMode() flags, and then wait for SDL_VIDEORESIZE events.
   381 	See SDL_events.h for details on the new SDL_ResizeEvent structure.
   383 	Added condition variable support, based on mutexes and semaphores.
   384 		SDL_CreateCond()
   385 		SDL_DestroyCond()
   386 		SDL_CondSignal()
   387 		SDL_CondBroadcast()
   388 		SDL_CondWait()
   389 		SDL_CondTimedWait()
   390 	The new function prototypes are in SDL_mutex.h
   392 	Added counting semaphore support, based on the mutex primitive.
   393 		SDL_CreateSemaphore()
   394 		SDL_DestroySemaphore()
   395 		SDL_SemWait()
   396 		SDL_SemTryWait()
   397 		SDL_SemWaitTimeout()
   398 		SDL_SemPost()
   399 		SDL_SemValue()
   400 	The new function prototypes are in SDL_mutex.h
   402 	Added support for asynchronous blitting.  To take advantage of this,
   403 	you must set the SDL_ASYNCBLIT flag when setting the video mode and
   404 	creating surfaces that you want accelerated in this way.  You must
   405 	lock surfaces that have this flag set, and the lock will block until
   406 	any queued blits have completed.
   408 	Added YUV video overlay support.
   409 	The supported YUV formats are: YV12, IYUV, YUY2, UYVY, and YVYU.
   410 	This function creates an overlay surface:
   411 		SDL_CreateYUVOverlay()
   412 	You must lock and unlock the overlay to get access to the data:
   413 		SDL_LockYUVOverlay() SDL_UnlockYUVOverlay()
   414 	You can then display the overlay:
   415 		SDL_DisplayYUVOverlay()
   416 	You must free the overlay when you are done using it:
   417 		SDL_FreeYUVOverlay()
   418 	See SDL_video.h for the full function prototypes.
   420 	The joystick hat position constants have been changed:
   421 	Old constant            New constant
   422 	------------            ------------
   423 	     0                  SDL_HAT_CENTERED
   424 	     1                  SDL_HAT_UP
   425 	     2                  SDL_HAT_RIGHTUP
   426 	     3                  SDL_HAT_RIGHT
   427 	     4                  SDL_HAT_RIGHTDOWN
   428 	     5                  SDL_HAT_DOWN
   429 	     6                  SDL_HAT_LEFTDOWN
   430 	     7                  SDL_HAT_LEFT
   431 	     8                  SDL_HAT_LEFTUP
   432 	The new constants are bitmasks, so you can check for the
   433 	individual axes like this:
   434 		if ( hat_position & SDL_HAT_UP ) {
   435 		}
   436 	and you'll catch left-up, up, and right-up.
   438 1.1.2:
   439 	Added multiple timer support:
   440 		SDL_AddTimer() and SDL_RemoveTimer()
   442 	SDL_WM_SetIcon() now respects the icon colorkey if mask is NULL.
   444 1.1.0:
   445 	Added initial OpenGL support.
   446 	First set GL attributes (such as RGB depth, alpha depth, etc.)
   447 		SDL_GL_SetAttribute()
   448 	Then call SDL_SetVideoMode() with the SDL_OPENGL flag.
   449 	Perform all of your normal GL drawing.
   450 	Finally swap the buffers with the new SDL function:
   451 		SDL_GL_SwapBuffers()
   452 	See the new 'testgl' test program for an example of using GL with SDL.
   454 	You can load GL extension functions by using the function:
   455 		SDL_GL_LoadProcAddress()
   457 	Added functions to initialize and cleanup specific SDL subsystems:
   458 		SDL_InitSubSystem() and SDL_QuitSubSystem()
   460 	Added user-defined event type:
   461 		typedef struct {
   462         		Uint8 type;
   463         		int code;
   464         		void *data1;
   465         		void *data2;
   466 		} SDL_UserEvent;
   467 	This structure is in the "user" member of an SDL_Event.
   469 	Added a function to push events into the event queue:
   470 		SDL_PushEvent()
   472 	Example of using the new SDL user-defined events:
   473 	{
   474 		SDL_Event event;
   476 		event.type = SDL_USEREVENT;
   477 		event.user.code = my_event_code;
   478 		event.user.data1 = significant_data;
   479 		event.user.data2 = 0;
   480 		SDL_PushEvent(&event);
   481 	}
   483 	Added a function to get mouse deltas since last query:
   484 		SDL_GetRelativeMouseState()
   486 	Added a boolean datatype to SDL_types.h:
   487 		SDL_bool = { SDL_TRUE, SDL_FALSE }
   489 	Added a function to get the current audio status:
   490 		SDL_GetAudioState();
   491 	It returns one of:
   496 	Added an AAlib driver (ASCII Art) - by Stephane Peter.
   498 1.0.6:
   499 	The input grab state is reset after each call to SDL_SetVideoMode().
   500 	The input is grabbed by default in fullscreen mode, and ungrabbed in
   501 	windowed mode.  If you want to set input grab to a particular value,
   502 	you should set it after each call to SDL_SetVideoMode().
   504 1.0.5:
   505 	Exposed SDL_AudioInit(), SDL_VideoInit()
   506 	Added SDL_AudioDriverName() and SDL_VideoDriverName()
   508 	Added new window manager function:
   509 		SDL_WM_ToggleFullScreen()
   510 	This is currently implemented only on Linux
   512 	The ALT-ENTER code has been removed - it's not appropriate for a
   513 	lib to bind keys when they aren't even emergency escape sequences.
   515 	ALT-ENTER functionality can be implemented with the following code:
   517 	int Handle_AltEnter(const SDL_Event *event)
   518 	{
   519 	    if ( event->type == SDL_KEYDOWN ) {
   520 	        if ( (event->key.keysym.sym == SDLK_RETURN) &&
   521 	             (event->key.keysym.mod & KMOD_ALT) ) {   
   522 	                SDL_WM_ToggleFullScreen(SDL_GetVideoSurface());
   523 	                return(0);
   524 	        }
   525 	    }
   526 	    return(1);
   527 	}
   528 	SDL_SetEventFilter(Handle_AltEnter);
   530 1.0.3:
   531 	Under X11, if you grab the input and hide the mouse cursor,
   532 	the mouse will go into a "relative motion" mode where you
   533 	will always get relative motion events no matter how far in
   534 	each direction you move the mouse - relative motion is not
   535 	bounded by the edges of the window (though the absolute values
   536 	of the mouse positions are clamped by the size of the window).
   537 	The SVGAlib, framebuffer console, and DirectInput drivers all
   538 	have this behavior naturally, and the GDI and BWindow drivers
   539 	never go into "relative motion" mode.
   541 1.0.2:
   542 	Added a function to enable keyboard repeat:
   543 		SDL_EnableKeyRepeat()
   545 	Added a function to grab the mouse and keyboard input
   546 		SDL_WM_GrabInput()
   548 	Added a function to iconify the window.
   549 		SDL_WM_IconifyWindow()
   550 	If this function succeeds, the application will receive an event
   551 	signaling SDL_APPACTIVE event 
   553 1.0.1:
   554 	Added constants to SDL_audio.h for 16-bit native byte ordering:
   557 1.0.0:
   558 	New public release
   560 Version 0.11:
   562 0.11.5:
   563 	A new function SDL_GetVideoSurface() has been added, and returns
   564 	a pointer to the current display surface.
   566 	SDL_AllocSurface() has been renamed SDL_CreateRGBSurface(), and
   567 	a new function SDL_CreateRGBSurfaceFrom() has been added to allow
   568 	creating an SDL surface from an existing pixel data buffer.
   570 	Added SDL_GetRGB() to the headers and documentation.
   572 0.11.4:
   573 	SDL_SetLibraryPath() is no longer meaningful, and has been removed.
   575 0.11.3:
   576 	A new flag for SDL_Init(), SDL_INIT_NOPARACHUTE, prevents SDL from
   577 	installing fatal signal handlers on operating systems that support
   578 	them.
   580 Version 0.9:
   582 0.9.15:
   583 	SDL_CreateColorCursor() has been removed.  Color cursors should
   584 	be implemented as sprites, blitted by the application when the
   585 	cursor moves.  To get smooth color cursor updates when the app
   586 	is busy, pass the SDL_INIT_EVENTTHREAD flag to SDL_Init().  This
   587 	allows you to handle the mouse motion in another thread from an
   588 	event filter function, but is currently only supported by Linux
   589 	and BeOS.  Note that you'll have to protect the display surface
   590 	from multi-threaded access by using mutexes if you do this.
   592 	Thread-safe surface support has been removed from SDL.
   593 	This makes blitting somewhat faster, by removing SDL_MiddleBlit().
   594 	Code that used SDL_MiddleBlit() should use SDL_LowerBlit() instead.
   595 	You can make your surfaces thread-safe by allocating your own
   596 	mutex and making lock/unlock calls around accesses to your surface.
   598 0.9.14:
   599 	SDL_GetMouseState() now takes pointers to int rather than Uint16.
   601 	If you set the SDL_WINDOWID environment variable under UNIX X11,
   602 	SDL will use that as the main window instead of creating it's own.
   603 	This is an unsupported extension to SDL, and not portable at all.
   605 0.9.13:
   606 	Added a function SDL_SetLibraryPath() which can be used to specify
   607 	the directory containing the SDL dynamic libraries.  This is useful
   608 	for commercial applications which ship with particular versions
   609 	of the libraries, and for security on multi-user systems.
   610 	If this function is not used, the default system directories are 
   611 	searched using the native dynamic object loading mechanism.
   613 	In order to support C linkage under Visual C++, you must declare
   614 	main() without any return type:
   615 		main(int argc, char *argv[]) {
   616 			/* Do the program... */
   617 			return(0);
   618 		}
   619 	C++ programs should also return a value if compiled under VC++.
   621 	The blit_endian member of the SDL_VideoInfo struct has been removed.
   623 	SDL_SymToASCII() has been replaced with SDL_GetKeyName(), so there
   624 	is now no longer any function to translate a keysym to a character.
   626 	The SDL_keysym structure has been extended with a 'scancode' and
   627 	'unicode' member.  The 'scancode' is a hardware specific scancode
   628 	for the key that was pressed, and may be 0.  The 'unicode' member
   629 	is a 16-bit UNICODE translation of the key that was pressed along
   630 	with any modifiers or compose keys that have been pressed.
   631 	If no UNICODE translation exists for the key, 'unicode' will be 0.
   633 	Added a function SDL_EnableUNICODE() to enable/disable UNICODE
   634 	translation of character keypresses.  Translation defaults off.
   636 	To convert existing code to use the new API, change code which
   637 	uses SDL_SymToASCII() to get the keyname to use SDL_GetKeyName(),
   638 	and change code which uses it to get the ASCII value of a sym to
   639 	use the 'unicode' member of the event keysym.
   641 0.9.12:
   642 	There is partial support for 64-bit datatypes.  I don't recommend 
   643 	you use this if you have a choice, because 64-bit datatypes are not
   644 	supported on many platforms.  On platforms for which it is supported,
   645 	the SDL_HAS_64BIT_TYPE C preprocessor define will be enabled, and
   646 	you can use the Uint64 and Sint64 datatypes.
   648 	Added functions to SDL_endian.h to support 64-bit datatypes:
   649 	    SDL_SwapLE64(), SDL_SwapBE64(),
   650 	    SDL_ReadLE64(), SDL_ReadBE64(), SDL_WriteLE64(), SDL_WriteBE64()
   652 	A new member "len_ratio" has been added to the SDL_AudioCVT structure,
   653 	and allows you to determine either the original buffer length or the
   654 	converted buffer length, given the other.
   656 	A new function SDL_FreeWAV() has been added to the API to free data
   657 	allocated by SDL_LoadWAV_RW().  This is necessary under Win32 since
   658 	the gcc compiled DLL uses a different heap than VC++ compiled apps.
   660 	SDL now has initial support for international keyboards using the
   661 	Latin character set.
   662 	If a particular mapping is desired, you can set the DEFAULT_KEYBOARD
   663 	compile-time variable, or you can set the environment variable 
   664 	"SDL_KEYBOARD" to a string identifying the keyboard mapping you desire.
   665 	The valid values for these variables can be found in SDL_keyboard.c
   667 	Full support for German and French keyboards under X11 is implemented.
   669 0.9.11:
   670 	The THREADED_EVENTS compile-time define has been replaced with the
   671 	SDL_INIT_EVENTTHREAD flag.  If this flag is passed to SDL_Init(),
   672 	SDL will create a separate thread to perform input event handling.
   673 	If this flag is passed to SDL_Init(), and the OS doesn't support 
   674 	event handling in a separate thread, SDL_Init() will fail.
   675 	Be sure to add calls to SDL_Delay() in your main thread to allow
   676 	the OS to schedule your event thread, or it may starve, leading
   677 	to slow event delivery and/or dropped events.
   678 	Currently MacOS and Win32 do not support this flag, while BeOS 
   679 	and Linux do support it.  I recommend that your application only
   680 	use this flag if absolutely necessary.
   682 	The SDL thread function passed to SDL_CreateThread() now returns a
   683 	status.  This status can be retrieved by passing a non-NULL pointer
   684 	as the 'status' argument to SDL_WaitThread().
   686 	The volume parameter to SDL_MixAudio() has been increased in range
   687 	from (0-8) to (0-128)
   689 	SDL now has a data source abstraction which can encompass a file,
   690 	an area of memory, or any custom object you can envision.  It uses
   691 	these abstractions, SDL_RWops, in the endian read/write functions,
   692 	and the built-in WAV and BMP file loaders.  This means you can load
   693 	WAV chunks from memory mapped files, compressed archives, network
   694 	pipes, or anything else that has a data read abstraction.
   696 	There are three built-in data source abstractions:
   697 	    SDL_RWFromFile(), SDL_RWFromFP(), SDL_RWFromMem()
   698 	along with a generic data source allocation function:
   699 	    SDL_AllocRW()
   700 	These data sources can be used like stdio file pointers with the
   701 	following convenience functions:
   702 	    SDL_RWseek(), SDL_RWread(), SDL_RWwrite(), SDL_RWclose()
   703 	These functions are defined in the new header file "SDL_rwops.h"
   705 	The endian swapping functions have been turned into macros for speed
   706 	and SDL_CalculateEndian() has been removed.  SDL_endian.h now defines
   707 	SDL_BYTEORDER as either SDL_BIG_ENDIAN or SDL_LIL_ENDIAN depending on
   708 	the endianness of the host system.
   710 	The endian read/write functions now take an SDL_RWops pointer
   711 	instead of a stdio FILE pointer, to support the new data source
   712 	abstraction.
   714 	The SDL_*LoadWAV() functions have been replaced with a single
   715 	SDL_LoadWAV_RW() function that takes a SDL_RWops pointer as it's
   716 	first parameter, and a flag whether or not to automatically 
   717 	free it as the second parameter.  SDL_LoadWAV() is a macro for
   718 	backward compatibility and convenience:
   719 	    SDL_LoadWAV_RW(SDL_RWFromFile("sample.wav", "rb"), 1, ...);
   721 	The SDL_*LoadBMP()/SDL_*SaveBMP() functions have each been replaced
   722 	with a single function that takes a SDL_RWops pointer as it's
   723 	first parameter, and a flag whether or not to automatically 
   724 	free it as the second parameter.  SDL_LoadBMP() and SDL_SaveBMP()
   725 	are macros for backward compatibility and convenience:
   726 	    SDL_LoadBMP_RW(SDL_RWFromFile("sample.bmp", "rb"), 1, ...);
   727 	    SDL_SaveBMP_RW(SDL_RWFromFile("sample.bmp", "wb"), 1, ...);
   728 	Note that these functions use SDL_RWseek() extensively, and should
   729 	not be used on pipes or other non-seekable data sources.
   731 0.9.10:
   732 	The Linux SDL_SysWMInfo and SDL_SysWMMsg structures have been 
   733 	extended to support multiple types of display drivers, as well as
   734         safe access to the X11 display when THREADED_EVENTS is enabled.
   735         The new structures are documented in the SDL_syswm.h header file.
   737 	Thanks to John Elliott <jce@seasip.demon.co.uk>, the UK keyboard
   738 	should now work properly, as well as the "Windows" keys on US
   739 	keyboards.
   741 	The Linux CD-ROM code now reads the CD-ROM devices from /etc/fstab
   742 	instead of trying to open each block device on the system.
   743 	The CD must be listed in /etc/fstab as using the iso9660 filesystem.
   745 	On Linux, if you define THREADED_EVENTS at compile time, a separate
   746 	thread will be spawned to gather X events asynchronously from the
   747 	graphics updates.  This hasn't been extensively tested, but it does
   748 	provide a means of handling keyboard and mouse input in a separate
   749 	thread from the graphics thread.  (This is now enabled by default.)
   751 	A special access function SDL_PeepEvents() allows you to manipulate
   752 	the event queue in a thread-safe manner, including peeking at events,
   753 	removing events of a specified type, and adding new events of arbitrary
   754 	type to the queue (use the new 'user' member of the SDL_Event type).
   756 	If you use SDL_PeepEvents() to gather events, then the main graphics
   757 	thread needs to call SDL_PumpEvents() periodically to drive the event
   758 	loop and generate input events.  This is not necessary if SDL has been 
   759 	compiled with THREADED_EVENTS defined, but doesn't hurt.
   761 	A new function SDL_ThreadID() returns the identifier associated with
   762 	the current thread.
   764 0.9.9:
   765 	The AUDIO_STEREO format flag has been replaced with a new 'channels'
   766 	member of the SDL_AudioSpec structure.  The channels are 1 for mono
   767 	audio, and 2 for stereo audio.  In the future more channels may be
   768 	supported for 3D surround sound.
   770 	The SDL_MixAudio() function now takes an additional volume parameter,
   771 	which should be set to SDL_MIX_MAXVOLUME for compatibility with the
   772 	original function.
   774 	The CD-ROM functions which take a 'cdrom' parameter can now be
   775 	passed NULL, and will act on the last successfully opened CD-ROM.
   777 0.9.8:
   778 	No changes, bugfixes only.
   780 0.9.7:
   781 	No changes, bugfixes only.
   783 0.9.6:
   784 	Added a fast rectangle fill function: SDL_FillRect()
   786 	Addition of a useful function for getting info on the video hardware:
   787 	    const SDL_VideoInfo *SDL_GetVideoInfo(void)
   788         This function replaces SDL_GetDisplayFormat().
   790 	Initial support for double-buffering:
   791 	  Use the SDL_DOUBLEBUF flag in SDL_SetVideoMode()
   792 	  Update the screen with a new function: SDL_Flip()
   794 	SDL_AllocSurface() takes two new flags:
   795 	SDL_SRCCOLORKEY means that the surface will be used for colorkey blits
   796 	  and if the hardware supports hardware acceleration of colorkey blits
   797 	  between two surfaces in video memory, to place the surface in video
   798 	  memory if possible, otherwise it will be placed in system memory.
   799 	SDL_SRCALPHA means that the surface will be used for alpha blits and
   800 	  if the hardware supports hardware acceleration of alpha blits between
   801 	  two surfaces in video memory, to place the surface in video memory
   802 	  if possible, otherwise it will be placed in system memory.
   803 	SDL_HWSURFACE now means that the surface will be created with the 
   804 	  same format as the display surface, since having surfaces in video
   805 	  memory is only useful for fast blitting to the screen, and you can't
   806 	  blit surfaces with different surface formats in video memory.
   808 0.9.5:
   809 	You can now pass a NULL mask to SDL_WM_SetIcon(), and it will assume
   810 	that the icon consists of the entire image.
   812 	SDL_LowerBlit() is back -- but don't use it on the display surface.
   813 	It is exactly the same as SDL_MiddleBlit(), but doesn't check for
   814 	thread safety.
   816 	Added SDL_FPLoadBMP(), SDL_FPSaveBMP(), SDL_FPLoadWAV(), which take
   817 	a FILE pointer instead of a file name.
   819 	Added CD-ROM audio control API:
   820 	    SDL_CDNumDrives()
   821 	    SDL_CDName()
   822 	    SDL_CDOpen()
   823 	    SDL_CDStatus()
   824 	    SDL_CDPlayTracks()
   825 	    SDL_CDPlay()
   826 	    SDL_CDPause()
   827 	    SDL_CDResume()
   828 	    SDL_CDStop()
   829 	    SDL_CDEject()
   830 	    SDL_CDClose()
   832 0.9.4:
   833 	No changes, bugfixes only.
   835 0.9.3:
   836 	Mouse motion event now includes relative motion information:
   837 	    Sint16 event->motion.xrel, Sint16 event->motion.yrel
   839 	X11 keyrepeat handling can be disabled by defining IGNORE_X_KEYREPEAT
   840 	    (Add -DIGNORE_X_KEYREPEAT to CFLAGS line in obj/x11Makefile)
   842 0.9.2:
   843 	No changes, bugfixes only.
   845 0.9.1:
   846 	Removed SDL_MapSurface() and SDL_UnmapSurface() -- surfaces are now
   847 	automatically mapped on blit.
   849 0.8.0:
   850 	SDL stable release