sdl-ios-xcode: WhatsNew comparison

comparison WhatsNew @ 5046:4cb778067834

Clearing the API changes for the 1.3.0 release

author	Sam Lantinga <slouken@libsdl.org>
date	Wed, 19 Jan 2011 22:20:44 -0800
parents	c121d94672cb
children

comparison

equal deleted inserted replaced

-:1cee937d9fcc
+:4cb778067834
 This is a list of API changes in SDL's version history.
-1.3.0:
-	Added SDL_GetNumVideoDrivers() and SDL_GetVideoDriver().
-	Replaced SDL_VideoDriverName() with SDL_GetCurrentVideoDriver()
-	Added SDL_GetNumAudioDrivers() and SDL_GetAudioDriver().
-	Replaced SDL_AudioDriverName() with SDL_GetCurrentAudioDriver()
-1.2.10:
-	If SDL_OpenAudio() is passed zero for the desired format
-	fields, the following environment variables will be used
-	to fill them in:
-		SDL_AUDIO_FREQUENCY
-		SDL_AUDIO_FORMAT
-		SDL_AUDIO_CHANNELS
-		SDL_AUDIO_SAMPLES
-	If an environment variable is not specified, it will be set
-	to a reasonable default value.
-	Added support for the SDL_VIDEO_FULLSCREEN_HEAD environment
-	variable, currently supported on X11 Xinerama configurations.
-	Added SDL_GL_SWAP_CONTROL to wait for vsync in OpenGL applications.
-	Added SDL_GL_ACCELERATED_VISUAL to guarantee hardware acceleration.
-	Added current_w and current_h to the SDL_VideoInfo structure,
-	which is set to the desktop resolution during video intialization,
-	and then set to the current resolution when a video mode is set.
-	SDL_SetVideoMode() now accepts 0 for width or height and will use
-	the current video mode (or the desktop mode if no mode has been set.)
-	Added SDL_GetKeyRepeat()
-	Added SDL_config.h, with defaults for various build environments.
-1.2.7:
-	Added CPU feature detection functions to SDL_cpuinfo.h:
-		SDL_HasRDTSC(), SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE(),
-		SDL_HasAltiVec()
-	Added function to create RWops from const memory: SDL_RWFromConstMem()
-1.2.6:
-	Added SDL_LoadObject(), SDL_LoadFunction(), and SDL_UnloadObject()
-	Added SDL_GL_MULTISAMPLEBUFFERS and SDL_GL_MULTISAMPLESAMPLES for FSAA
-1.2.5:
-	Added SDL_BUTTON_WHEELUP (4) and SDL_BUTTON_WHEELDOWN (5)
-	Added SDL_GL_STEREO for stereoscopic OpenGL contexts
-1.2.0:
-	Added SDL_VIDEOEXPOSE event to signal that the screen needs to
-	be redrawn.  This is currently only delivered to OpenGL windows
-	on X11, though it may be delivered in the future when the video
-	memory is lost under DirectX.
-1.1.8:
-	You can pass SDL_NOFRAME to SDL_VideoMode() to create a window
-	that has no title bar or frame decoration.  Fullscreen video
-	modes automatically have this flag set.
-	Added a function to query the clipping rectangle for a surface:
-		void SDL_GetClipRect(SDL_Surface *surface, SDL_Rect *rect)
-	Added a function to query the current event filter:
-		SDL_EventFilter SDL_GetEventFilter(void)
-	If you pass -1 to SDL_ShowCursor(), it won't change the current
-	cursor visibility state, but will still return it.
-	SDL_LockSurface() and SDL_UnlockSurface() are recursive, meaning
-	you can nest them as deep as you want, as long as each lock call
-	has a matching unlock call.  The surface remains locked until the
-	last matching unlock call.
-	Note that you may not blit to or from a locked surface.
-1.1.7:
-	The SDL_SetGammaRamp() and SDL_GetGammaRamp() functions now take
-	arrays of Uint16 values instead of Uint8 values.  For the most part,
-	you can just take your old values and shift them up 8 bits to get
-	new correct values for your gamma ramps.
-	You can pass SDL_RLEACCEL in flags passed to SDL_ConvertSurface()
-and SDL will try to RLE accelerate colorkey and alpha blits in the
-	resulting surface.
-1.1.6:
-	Added a function to return the thread ID of a specific thread:
-		Uint32 SDL_GetThreadID(SDL_Thread *thread)
-	If 'thread' is NULL, this function returns the id for this thread.
-1.1.5:
-	The YUV overlay structure has been changed to use an array of
-	pitches and pixels representing the planes of a YUV image, to
-	better enable hardware acceleration.  The YV12 and IYUV formats
-	each have three planes, corresponding to the Y, U, and V portions
-	of the image, while packed pixel YUV formats just have one plane.
-	For palettized mode (8bpp), the screen colormap is now split in
-	a physical and a logical palette. The physical palette determines
-	what colours the screen pixels will get when displayed, and the
-	logical palette controls the mapping from blits to/from the screen.
-	A new function, SDL_SetPalette() has been added to change
-	logical and physical palettes separately. SDL_SetColors() works
-	just as before, and is equivalent to calling SDL_SetPalette() with
-	a flag argument of (SDL_LOGPAL|SDL_PHYSPAL).
-	SDL_BlitSurface() no longer modifies the source rectangle, only the
-	destination rectangle. The width/height members of the destination
-	rectangle are ignored, only the position is used.
-	The old source clipping function SDL_SetClipping() has been replaced
-	with a more useful function to set the destination clipping rectangle:
-		SDL_bool SDL_SetClipRect(SDL_Surface *surface, SDL_Rect *rect)
-	Added a function to see what subsystems have been initialized:
-		Uint32 SDL_WasInit(Uint32 flags)
-	The Big Alpha Flip: SDL now treats alpha as opacity like everybody
-	else, and not as transparency:
-	A new cpp symbol: SDL_ALPHA_OPAQUE is defined as 255
-	A new cpp symbol: SDL_ALPHA_TRANSPARENT is defined as 0
-	Values between 0 and 255 vary from fully transparent to fully opaque.
-	New functions:
-	SDL_DisplayFormatAlpha()
-	    Returns a surface converted to a format with alpha-channel
-	    that can be blit efficiently to the screen. (In other words,
-	    like SDL_DisplayFormat() but the resulting surface has
-	    an alpha channel.)  This is useful for surfaces with alpha.
-	SDL_MapRGBA()
-	    Works as SDL_MapRGB() but takes an additional alpha parameter.
-	SDL_GetRGBA()
-	    Works as SDL_GetRGB() but also returns the alpha value
-	    (SDL_ALPHA_OPAQUE for formats without an alpha channel)
-	Both SDL_GetRGB() and SDL_GetRGBA() now always return values in
-	the [0..255] interval. Previously, SDL_GetRGB() would return
-	(0xf8, 0xfc, 0xf8) for a completely white pixel in RGB565 format.
-	(N.B.: This is broken for bit fields < 3 bits.)
-	SDL_MapRGB() returns pixels in which the alpha channel is set opaque.
-	SDL_SetAlpha() can now be used for both setting the per-surface
-	alpha, using the new way of thinking of alpha, and also to enable
-	and disable per-pixel alpha blending for surfaces with an alpha
-	channel:
-		To disable alpha blending:
-			SDL_SetAlpha(surface, 0, 0);
-		To re-enable alpha blending:
-			SDL_SetAlpha(surface, SDL_SRCALPHA, 0);
-	Surfaces with an alpha channel have blending enabled by default.
-	SDL_SetAlpha() now accepts SDL_RLEACCEL as a flag, which requests
-	RLE acceleration of blits, just as like with SDL_SetColorKey().
-	This flag can be set for both surfaces with an alpha channel
-	and surfaces with an alpha value set by SDL_SetAlpha().
-	As always, RLE surfaces must be locked before pixel access is
-	allowed, and unlocked before any other SDL operations are done
-	on it.
-	The blit semantics for surfaces with and without alpha and colorkey
-	have now been defined:
-	RGBA->RGB:
-	    SDL_SRCALPHA set:
-		alpha-blend (using alpha-channel).
-		SDL_SRCCOLORKEY ignored.
-	    SDL_SRCALPHA not set:
-		copy RGB.
-		if SDL_SRCCOLORKEY set, only copy the pixels matching the
-		RGB values of the source colour key, ignoring alpha in the
-		comparison.
-	RGB->RGBA:
-	    SDL_SRCALPHA set:
-		alpha-blend (using the source per-surface alpha value);
-		set destination alpha to opaque.
-	    SDL_SRCALPHA not set:
-		copy RGB, set destination alpha to opaque.
-	    both:
-		if SDL_SRCCOLORKEY set, only copy the pixels matching the
-		source colour key.
-	RGBA->RGBA:
-	    SDL_SRCALPHA set:
-		alpha-blend (using the source alpha channel) the RGB values;
-		leave destination alpha untouched. [Note: is this correct?]
-		SDL_SRCCOLORKEY ignored.
-	    SDL_SRCALPHA not set:
-		copy all of RGBA to the destination.
-		if SDL_SRCCOLORKEY set, only copy the pixels matching the
-		RGB values of the source colour key, ignoring alpha in the
-		comparison.
-	RGB->RGB:
-	    SDL_SRCALPHA set:
-		alpha-blend (using the source per-surface alpha value).
-	    SDL_SRCALPHA not set:
-		copy RGB.
-	    both:
-		if SDL_SRCCOLORKEY set, only copy the pixels matching the
-		source colour key.
-	As a special case, blits from surfaces with per-surface alpha
-	value of 128 (50% transparency) are optimised and much faster
-	than other alpha values. This does not apply to surfaces with
-	alpha channels (per-pixel alpha).
-	New functions for manipulating the gamma of the display have
-	been added:
-		int SDL_SetGamma(float red, float green, float blue);
-		int SDL_SetGammaRamp(Uint8 *red, Uint8 *green, Uint8 *blue);
-		int SDL_GetGammaRamp(Uint8 *red, Uint8 *green, Uint8 *blue);
-	Gamma ramps are tables with 256 entries which map the screen color
-	components into actually displayed colors.  For an example of
-	implementing gamma correction and gamma fades, see test/testgamma.c
-	Gamma control is not supported on all hardware.
-1.1.4:
-	The size of the SDL_CDtrack structure changed from 8 to 12 bytes
-	as the size of the length member was extended to 32 bits.
-You can now use SDL for 2D blitting with a GL mode by passing the
-	SDL_OPENGLBLIT flag to SDL_SetVideoMode().  You can specify 16 or
-	32 bpp, and the data in the framebuffer is put into the GL scene
-	when you call SDL_UpdateRects(), and the scene will be visible
-	when you call SDL_GL_SwapBuffers().
-	Run the "testgl" test program with the -logo command line option
-	to see an example of this blending of 2D and 3D in SDL.
-1.1.3:
-	Added SDL_FreeRW() to the API, to complement SDL_AllocRW()
-	Added resizable window support - just add SDL_RESIZABLE to the
-	SDL_SetVideoMode() flags, and then wait for SDL_VIDEORESIZE events.
-	See SDL_events.h for details on the new SDL_ResizeEvent structure.
-	Added condition variable support, based on mutexes and semaphores.
-		SDL_CreateCond()
-		SDL_DestroyCond()
-		SDL_CondSignal()
-		SDL_CondBroadcast()
-		SDL_CondWait()
-		SDL_CondTimedWait()
-	The new function prototypes are in SDL_mutex.h
-	Added counting semaphore support, based on the mutex primitive.
-		SDL_CreateSemaphore()
-		SDL_DestroySemaphore()
-		SDL_SemWait()
-		SDL_SemTryWait()
-		SDL_SemWaitTimeout()
-		SDL_SemPost()
-		SDL_SemValue()
-	The new function prototypes are in SDL_mutex.h
-	Added support for asynchronous blitting.  To take advantage of this,
-	you must set the SDL_ASYNCBLIT flag when setting the video mode and
-	creating surfaces that you want accelerated in this way.  You must
-	lock surfaces that have this flag set, and the lock will block until
-	any queued blits have completed.
-	Added YUV video overlay support.
-	The supported YUV formats are: YV12, IYUV, YUY2, UYVY, and YVYU.
-	This function creates an overlay surface:
-		SDL_CreateYUVOverlay()
-	You must lock and unlock the overlay to get access to the data:
-		SDL_LockYUVOverlay() SDL_UnlockYUVOverlay()
-	You can then display the overlay:
-		SDL_DisplayYUVOverlay()
-	You must free the overlay when you are done using it:
-		SDL_FreeYUVOverlay()
-	See SDL_video.h for the full function prototypes.
-	The joystick hat position constants have been changed:
-	Old constant            New constant
-	------------            ------------
-	     0                  SDL_HAT_CENTERED
-	     1                  SDL_HAT_UP
-	     2                  SDL_HAT_RIGHTUP
-	     3                  SDL_HAT_RIGHT
-	     4                  SDL_HAT_RIGHTDOWN
-	     5                  SDL_HAT_DOWN
-	     6                  SDL_HAT_LEFTDOWN
-	     7                  SDL_HAT_LEFT
-	     8                  SDL_HAT_LEFTUP
-	The new constants are bitmasks, so you can check for the
-	individual axes like this:
-		if ( hat_position & SDL_HAT_UP ) {
-		}
-	and you'll catch left-up, up, and right-up.
-1.1.2:
-	Added multiple timer support:
-		SDL_AddTimer() and SDL_RemoveTimer()
-	SDL_WM_SetIcon() now respects the icon colorkey if mask is NULL.
-1.1.0:
-	Added initial OpenGL support.
-	First set GL attributes (such as RGB depth, alpha depth, etc.)
-		SDL_GL_SetAttribute()
-	Then call SDL_SetVideoMode() with the SDL_OPENGL flag.
-	Perform all of your normal GL drawing.
-	Finally swap the buffers with the new SDL function:
-		SDL_GL_SwapBuffers()
-	See the new 'testgl' test program for an example of using GL with SDL.
-	You can load GL extension functions by using the function:
-		SDL_GL_LoadProcAddress()
-	Added functions to initialize and cleanup specific SDL subsystems:
-		SDL_InitSubSystem() and SDL_QuitSubSystem()
-	Added user-defined event type:
-		typedef struct {
-		Uint8 type;
-		int code;
-		void *data1;
-		void *data2;
-		} SDL_UserEvent;
-	This structure is in the "user" member of an SDL_Event.
-	Added a function to push events into the event queue:
-		SDL_PushEvent()
-	Example of using the new SDL user-defined events:
-	{
-		SDL_Event event;
-		event.type = SDL_USEREVENT;
-		event.user.code = my_event_code;
-		event.user.data1 = significant_data;
-		event.user.data2 = 0;
-		SDL_PushEvent(&event);
-	}
-	Added a function to get mouse deltas since last query:
-		SDL_GetRelativeMouseState()
-	Added a boolean datatype to SDL_types.h:
-		SDL_bool = { SDL_TRUE, SDL_FALSE }
-	Added a function to get the current audio status:
-		SDL_GetAudioState();
-	It returns one of:
-		SDL_AUDIO_STOPPED,
-		SDL_AUDIO_PLAYING,
-		SDL_AUDIO_PAUSED
-	Added an AAlib driver (ASCII Art) - by Stephane Peter.
-1.0.6:
-	The input grab state is reset after each call to SDL_SetVideoMode().
-	The input is grabbed by default in fullscreen mode, and ungrabbed in
-	windowed mode.  If you want to set input grab to a particular value,
-	you should set it after each call to SDL_SetVideoMode().
-1.0.5:
-	Exposed SDL_AudioInit(), SDL_VideoInit()
-	Added SDL_AudioDriverName() and SDL_VideoDriverName()
-	Added new window manager function:
-		SDL_WM_ToggleFullScreen()
-	This is currently implemented only on Linux
-	The ALT-ENTER code has been removed - it's not appropriate for a
-	lib to bind keys when they aren't even emergency escape sequences.
-	ALT-ENTER functionality can be implemented with the following code:
-	int Handle_AltEnter(const SDL_Event *event)
-	{
-	    if ( event->type == SDL_KEYDOWN ) {
-	        if ( (event->key.keysym.sym == SDLK_RETURN) &&
-	             (event->key.keysym.mod & KMOD_ALT) ) {
-	                SDL_WM_ToggleFullScreen(SDL_GetVideoSurface());
-	                return(0);
-	        }
-	    }
-	    return(1);
-	}
-	SDL_SetEventFilter(Handle_AltEnter);
-1.0.3:
-	Under X11, if you grab the input and hide the mouse cursor,
-	the mouse will go into a "relative motion" mode where you
-	will always get relative motion events no matter how far in
-	each direction you move the mouse - relative motion is not
-	bounded by the edges of the window (though the absolute values
-	of the mouse positions are clamped by the size of the window).
-	The SVGAlib, framebuffer console, and DirectInput drivers all
-	have this behavior naturally, and the GDI and BWindow drivers
-	never go into "relative motion" mode.
-1.0.2:
-	Added a function to enable keyboard repeat:
-		SDL_EnableKeyRepeat()
-	Added a function to grab the mouse and keyboard input
-		SDL_WM_GrabInput()
-	Added a function to iconify the window.
-		SDL_WM_IconifyWindow()
-	If this function succeeds, the application will receive an event
-	signaling SDL_APPACTIVE event
-1.0.1:
-	Added constants to SDL_audio.h for 16-bit native byte ordering:
-		AUDIO_U16SYS, AUDIO_S16SYS
-1.0.0:
-	New public release
-0.11.5:
-	A new function SDL_GetVideoSurface() has been added, and returns
-	a pointer to the current display surface.
-	SDL_AllocSurface() has been renamed SDL_CreateRGBSurface(), and
-	a new function SDL_CreateRGBSurfaceFrom() has been added to allow
-	creating an SDL surface from an existing pixel data buffer.
-	Added SDL_GetRGB() to the headers and documentation.
-0.11.4:
-	SDL_SetLibraryPath() is no longer meaningful, and has been removed.
-0.11.3:
-	A new flag for SDL_Init(), SDL_INIT_NOPARACHUTE, prevents SDL from
-	installing fatal signal handlers on operating systems that support
-	them.
-0.9.15:
-	SDL_CreateColorCursor() has been removed.  Color cursors should
-	be implemented as sprites, blitted by the application when the
-	cursor moves.  To get smooth color cursor updates when the app
-	is busy, pass the SDL_INIT_EVENTTHREAD flag to SDL_Init().  This
-	allows you to handle the mouse motion in another thread from an
-	event filter function, but is currently only supported by Linux
-	and BeOS.  Note that you'll have to protect the display surface
-	from multi-threaded access by using mutexes if you do this.
-	Thread-safe surface support has been removed from SDL.
-	This makes blitting somewhat faster, by removing SDL_MiddleBlit().
-	Code that used SDL_MiddleBlit() should use SDL_LowerBlit() instead.
-	You can make your surfaces thread-safe by allocating your own
-	mutex and making lock/unlock calls around accesses to your surface.
-0.9.14:
-	SDL_GetMouseState() now takes pointers to int rather than Uint16.
-	If you set the SDL_WINDOWID environment variable under UNIX X11,
-	SDL will use that as the main window instead of creating it's own.
-	This is an unsupported extension to SDL, and not portable at all.
-0.9.13:
-	Added a function SDL_SetLibraryPath() which can be used to specify
-	the directory containing the SDL dynamic libraries.  This is useful
-	for commercial applications which ship with particular versions
-	of the libraries, and for security on multi-user systems.
-	If this function is not used, the default system directories are
-	searched using the native dynamic object loading mechanism.
-	In order to support C linkage under Visual C++, you must declare
-	main() without any return type:
-		main(int argc, char *argv[]) {
-			/* Do the program... */
-			return(0);
-		}
-	C++ programs should also return a value if compiled under VC++.
-	The blit_endian member of the SDL_VideoInfo struct has been removed.
-	SDL_SymToASCII() has been replaced with SDL_GetKeyName(), so there
-	is now no longer any function to translate a keysym to a character.
-	The SDL_keysym structure has been extended with a 'scancode' and
-	'unicode' member.  The 'scancode' is a hardware specific scancode
-	for the key that was pressed, and may be 0.  The 'unicode' member
-	is a 16-bit UNICODE translation of the key that was pressed along
-	with any modifiers or compose keys that have been pressed.
-	If no UNICODE translation exists for the key, 'unicode' will be 0.
-	Added a function SDL_EnableUNICODE() to enable/disable UNICODE
-	translation of character keypresses.  Translation defaults off.
-	To convert existing code to use the new API, change code which
-	uses SDL_SymToASCII() to get the keyname to use SDL_GetKeyName(),
-	and change code which uses it to get the ASCII value of a sym to
-	use the 'unicode' member of the event keysym.
-0.9.12:
-	There is partial support for 64-bit datatypes.  I don't recommend
-	you use this if you have a choice, because 64-bit datatypes are not
-	supported on many platforms.  On platforms for which it is supported,
-	the SDL_HAS_64BIT_TYPE C preprocessor define will be enabled, and
-	you can use the Uint64 and Sint64 datatypes.
-	Added functions to SDL_endian.h to support 64-bit datatypes:
-	    SDL_SwapLE64(), SDL_SwapBE64(),
-	    SDL_ReadLE64(), SDL_ReadBE64(), SDL_WriteLE64(), SDL_WriteBE64()
-	A new member "len_ratio" has been added to the SDL_AudioCVT structure,
-	and allows you to determine either the original buffer length or the
-	converted buffer length, given the other.
-	A new function SDL_FreeWAV() has been added to the API to free data
-	allocated by SDL_LoadWAV_RW().  This is necessary under Win32 since
-	the gcc compiled DLL uses a different heap than VC++ compiled apps.
-	SDL now has initial support for international keyboards using the
-	Latin character set.
-	If a particular mapping is desired, you can set the DEFAULT_KEYBOARD
-	compile-time variable, or you can set the environment variable
-	"SDL_KEYBOARD" to a string identifying the keyboard mapping you desire.
-	The valid values for these variables can be found in SDL_keyboard.c
-	Full support for German and French keyboards under X11 is implemented.
-0.9.11:
-	The THREADED_EVENTS compile-time define has been replaced with the
-	SDL_INIT_EVENTTHREAD flag.  If this flag is passed to SDL_Init(),
-	SDL will create a separate thread to perform input event handling.
-	If this flag is passed to SDL_Init(), and the OS doesn't support
-	event handling in a separate thread, SDL_Init() will fail.
-	Be sure to add calls to SDL_Delay() in your main thread to allow
-	the OS to schedule your event thread, or it may starve, leading
-	to slow event delivery and/or dropped events.
-	Currently MacOS and Win32 do not support this flag, while BeOS
-	and Linux do support it.  I recommend that your application only
-	use this flag if absolutely necessary.
-	The SDL thread function passed to SDL_CreateThread() now returns a
-	status.  This status can be retrieved by passing a non-NULL pointer
-	as the 'status' argument to SDL_WaitThread().
-	The volume parameter to SDL_MixAudio() has been increased in range
-	from (0-8) to (0-128)
-	SDL now has a data source abstraction which can encompass a file,
-	an area of memory, or any custom object you can envision.  It uses
-	these abstractions, SDL_RWops, in the endian read/write functions,
-	and the built-in WAV and BMP file loaders.  This means you can load
-	WAV chunks from memory mapped files, compressed archives, network
-	pipes, or anything else that has a data read abstraction.
-	There are three built-in data source abstractions:
-	    SDL_RWFromFile(), SDL_RWFromFP(), SDL_RWFromMem()
-	along with a generic data source allocation function:
-	    SDL_AllocRW()
-	These data sources can be used like stdio file pointers with the
-	following convenience functions:
-	    SDL_RWseek(), SDL_RWread(), SDL_RWwrite(), SDL_RWclose()
-	These functions are defined in the new header file "SDL_rwops.h"
-	The endian swapping functions have been turned into macros for speed
-	and SDL_CalculateEndian() has been removed.  SDL_endian.h now defines
-	SDL_BYTEORDER as either SDL_BIG_ENDIAN or SDL_LIL_ENDIAN depending on
-	the endianness of the host system.
-	The endian read/write functions now take an SDL_RWops pointer
-	instead of a stdio FILE pointer, to support the new data source
-	abstraction.
-	The SDL_*LoadWAV() functions have been replaced with a single
-	SDL_LoadWAV_RW() function that takes a SDL_RWops pointer as it's
-	first parameter, and a flag whether or not to automatically
-	free it as the second parameter.  SDL_LoadWAV() is a macro for
-	backward compatibility and convenience:
-	    SDL_LoadWAV_RW(SDL_RWFromFile("sample.wav", "rb"), 1, ...);
-	The SDL_*LoadBMP()/SDL_*SaveBMP() functions have each been replaced
-	with a single function that takes a SDL_RWops pointer as it's
-	first parameter, and a flag whether or not to automatically
-	free it as the second parameter.  SDL_LoadBMP() and SDL_SaveBMP()
-	are macros for backward compatibility and convenience:
-	    SDL_LoadBMP_RW(SDL_RWFromFile("sample.bmp", "rb"), 1, ...);
-	    SDL_SaveBMP_RW(SDL_RWFromFile("sample.bmp", "wb"), 1, ...);
-	Note that these functions use SDL_RWseek() extensively, and should
-	not be used on pipes or other non-seekable data sources.
-0.9.10:
-	The Linux SDL_SysWMInfo and SDL_SysWMMsg structures have been
-	extended to support multiple types of display drivers, as well as
-safe access to the X11 display when THREADED_EVENTS is enabled.
-The new structures are documented in the SDL_syswm.h header file.
-	Thanks to John Elliott <jce@seasip.demon.co.uk>, the UK keyboard
-	should now work properly, as well as the "Windows" keys on US
-	keyboards.
-	The Linux CD-ROM code now reads the CD-ROM devices from /etc/fstab
-	instead of trying to open each block device on the system.
-	The CD must be listed in /etc/fstab as using the iso9660 filesystem.
-	On Linux, if you define THREADED_EVENTS at compile time, a separate
-	thread will be spawned to gather X events asynchronously from the
-	graphics updates.  This hasn't been extensively tested, but it does
-	provide a means of handling keyboard and mouse input in a separate
-	thread from the graphics thread.  (This is now enabled by default.)
-	A special access function SDL_PeepEvents() allows you to manipulate
-	the event queue in a thread-safe manner, including peeking at events,
-	removing events of a specified type, and adding new events of arbitrary
-	type to the queue (use the new 'user' member of the SDL_Event type).
-	If you use SDL_PeepEvents() to gather events, then the main graphics
-	thread needs to call SDL_PumpEvents() periodically to drive the event
-	loop and generate input events.  This is not necessary if SDL has been
-	compiled with THREADED_EVENTS defined, but doesn't hurt.
-	A new function SDL_ThreadID() returns the identifier associated with
-	the current thread.
-0.9.9:
-	The AUDIO_STEREO format flag has been replaced with a new 'channels'
-	member of the SDL_AudioSpec structure.  The channels are 1 for mono
-	audio, and 2 for stereo audio.  In the future more channels may be
-	supported for 3D surround sound.
-	The SDL_MixAudio() function now takes an additional volume parameter,
-	which should be set to SDL_MIX_MAXVOLUME for compatibility with the
-	original function.
-	The CD-ROM functions which take a 'cdrom' parameter can now be
-	passed NULL, and will act on the last successfully opened CD-ROM.
-0.9.8:
-	No changes, bugfixes only.
-0.9.7:
-	No changes, bugfixes only.
-0.9.6:
-	Added a fast rectangle fill function: SDL_FillRect()
-	Addition of a useful function for getting info on the video hardware:
-	    const SDL_VideoInfo *SDL_GetVideoInfo(void)
-This function replaces SDL_GetDisplayFormat().
-	Initial support for double-buffering:
-	  Use the SDL_DOUBLEBUF flag in SDL_SetVideoMode()
-	  Update the screen with a new function: SDL_Flip()
-	SDL_AllocSurface() takes two new flags:
-	SDL_SRCCOLORKEY means that the surface will be used for colorkey blits
-	  and if the hardware supports hardware acceleration of colorkey blits
-	  between two surfaces in video memory, to place the surface in video
-	  memory if possible, otherwise it will be placed in system memory.
-	SDL_SRCALPHA means that the surface will be used for alpha blits and
-	  if the hardware supports hardware acceleration of alpha blits between
-	  two surfaces in video memory, to place the surface in video memory
-	  if possible, otherwise it will be placed in system memory.
-	SDL_HWSURFACE now means that the surface will be created with the
-	  same format as the display surface, since having surfaces in video
-	  memory is only useful for fast blitting to the screen, and you can't
-	  blit surfaces with different surface formats in video memory.
-0.9.5:
-	You can now pass a NULL mask to SDL_WM_SetIcon(), and it will assume
-	that the icon consists of the entire image.
-	SDL_LowerBlit() is back -- but don't use it on the display surface.
-	It is exactly the same as SDL_MiddleBlit(), but doesn't check for
-	thread safety.
-	Added SDL_FPLoadBMP(), SDL_FPSaveBMP(), SDL_FPLoadWAV(), which take
-	a FILE pointer instead of a file name.
-	Added CD-ROM audio control API:
-	    SDL_CDNumDrives()
-	    SDL_CDName()
-	    SDL_CDOpen()
-	    SDL_CDStatus()
-	    SDL_CDPlayTracks()
-	    SDL_CDPlay()
-	    SDL_CDPause()
-	    SDL_CDResume()
-	    SDL_CDStop()
-	    SDL_CDEject()
-	    SDL_CDClose()
-0.9.4:
-	No changes, bugfixes only.
-0.9.3:
-	Mouse motion event now includes relative motion information:
-	    Sint16 event->motion.xrel, Sint16 event->motion.yrel
-	X11 keyrepeat handling can be disabled by defining IGNORE_X_KEYREPEAT
-	    (Add -DIGNORE_X_KEYREPEAT to CFLAGS line in obj/x11Makefile)
-0.9.2:
-	No changes, bugfixes only.
-0.9.1:
-	Removed SDL_MapSurface() and SDL_UnmapSurface() -- surfaces are now
-	automatically mapped on blit.
-0.8.0:
-	SDL stable release

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