2 This is a list of API changes in SDL's version history.
7 If SDL_OpenAudio() is passed zero for the desired format
8 fields, the following environment variables will be used
14 If an environment variable is not specified, it will be set
15 to a reasonable default value.
17 Added support for the SDL_VIDEO_FULLSCREEN_HEAD environment
18 variable, currently supported on X11 Xinerama configurations.
20 Added SDL_GL_SWAP_CONTROL to wait for vsync in OpenGL applications.
22 Added SDL_GL_ACCELERATED_VISUAL to guarantee hardware acceleration.
24 Added current_w and current_h to the SDL_VideoInfo structure,
25 which is set to the desktop resolution during video intialization,
26 and then set to the current resolution when a video mode is set.
28 SDL_SetVideoMode() now accepts 0 for width or height and will use
29 the current video mode (or the desktop mode if no mode has been set.)
31 Added SDL_GetKeyRepeat()
33 Added SDL_config.h, with defaults for various build environments.
36 Added CPU feature detection functions to SDL_cpuinfo.h:
37 SDL_HasRDTSC(), SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE(),
39 Added function to create RWops from const memory: SDL_RWFromConstMem()
42 Added SDL_LoadObject(), SDL_LoadFunction(), and SDL_UnloadObject()
44 Added SDL_GL_MULTISAMPLEBUFFERS and SDL_GL_MULTISAMPLESAMPLES for FSAA
47 Added SDL_BUTTON_WHEELUP (4) and SDL_BUTTON_WHEELDOWN (5)
49 Added SDL_GL_STEREO for stereoscopic OpenGL contexts
52 Added SDL_VIDEOEXPOSE event to signal that the screen needs to
53 be redrawn. This is currently only delivered to OpenGL windows
54 on X11, though it may be delivered in the future when the video
55 memory is lost under DirectX.
58 You can pass SDL_NOFRAME to SDL_VideoMode() to create a window
59 that has no title bar or frame decoration. Fullscreen video
60 modes automatically have this flag set.
62 Added a function to query the clipping rectangle for a surface:
63 void SDL_GetClipRect(SDL_Surface *surface, SDL_Rect *rect)
65 Added a function to query the current event filter:
66 SDL_EventFilter SDL_GetEventFilter(void)
68 If you pass -1 to SDL_ShowCursor(), it won't change the current
69 cursor visibility state, but will still return it.
71 SDL_LockSurface() and SDL_UnlockSurface() are recursive, meaning
72 you can nest them as deep as you want, as long as each lock call
73 has a matching unlock call. The surface remains locked until the
74 last matching unlock call.
76 Note that you may not blit to or from a locked surface.
79 The SDL_SetGammaRamp() and SDL_GetGammaRamp() functions now take
80 arrays of Uint16 values instead of Uint8 values. For the most part,
81 you can just take your old values and shift them up 8 bits to get
82 new correct values for your gamma ramps.
84 You can pass SDL_RLEACCEL in flags passed to SDL_ConvertSurface()
85 and SDL will try to RLE accelerate colorkey and alpha blits in the
89 Added a function to return the thread ID of a specific thread:
90 Uint32 SDL_GetThreadID(SDL_Thread *thread)
91 If 'thread' is NULL, this function returns the id for this thread.
94 The YUV overlay structure has been changed to use an array of
95 pitches and pixels representing the planes of a YUV image, to
96 better enable hardware acceleration. The YV12 and IYUV formats
97 each have three planes, corresponding to the Y, U, and V portions
98 of the image, while packed pixel YUV formats just have one plane.
100 For palettized mode (8bpp), the screen colormap is now split in
101 a physical and a logical palette. The physical palette determines
102 what colours the screen pixels will get when displayed, and the
103 logical palette controls the mapping from blits to/from the screen.
104 A new function, SDL_SetPalette() has been added to change
105 logical and physical palettes separately. SDL_SetColors() works
106 just as before, and is equivalent to calling SDL_SetPalette() with
107 a flag argument of (SDL_LOGPAL|SDL_PHYSPAL).
109 SDL_BlitSurface() no longer modifies the source rectangle, only the
110 destination rectangle. The width/height members of the destination
111 rectangle are ignored, only the position is used.
113 The old source clipping function SDL_SetClipping() has been replaced
114 with a more useful function to set the destination clipping rectangle:
115 SDL_bool SDL_SetClipRect(SDL_Surface *surface, SDL_Rect *rect)
117 Added a function to see what subsystems have been initialized:
118 Uint32 SDL_WasInit(Uint32 flags)
120 The Big Alpha Flip: SDL now treats alpha as opacity like everybody
121 else, and not as transparency:
123 A new cpp symbol: SDL_ALPHA_OPAQUE is defined as 255
124 A new cpp symbol: SDL_ALPHA_TRANSPARENT is defined as 0
125 Values between 0 and 255 vary from fully transparent to fully opaque.
128 SDL_DisplayFormatAlpha()
129 Returns a surface converted to a format with alpha-channel
130 that can be blit efficiently to the screen. (In other words,
131 like SDL_DisplayFormat() but the resulting surface has
132 an alpha channel.) This is useful for surfaces with alpha.
134 Works as SDL_MapRGB() but takes an additional alpha parameter.
136 Works as SDL_GetRGB() but also returns the alpha value
137 (SDL_ALPHA_OPAQUE for formats without an alpha channel)
139 Both SDL_GetRGB() and SDL_GetRGBA() now always return values in
140 the [0..255] interval. Previously, SDL_GetRGB() would return
141 (0xf8, 0xfc, 0xf8) for a completely white pixel in RGB565 format.
142 (N.B.: This is broken for bit fields < 3 bits.)
144 SDL_MapRGB() returns pixels in which the alpha channel is set opaque.
146 SDL_SetAlpha() can now be used for both setting the per-surface
147 alpha, using the new way of thinking of alpha, and also to enable
148 and disable per-pixel alpha blending for surfaces with an alpha
150 To disable alpha blending:
151 SDL_SetAlpha(surface, 0, 0);
152 To re-enable alpha blending:
153 SDL_SetAlpha(surface, SDL_SRCALPHA, 0);
154 Surfaces with an alpha channel have blending enabled by default.
156 SDL_SetAlpha() now accepts SDL_RLEACCEL as a flag, which requests
157 RLE acceleration of blits, just as like with SDL_SetColorKey().
158 This flag can be set for both surfaces with an alpha channel
159 and surfaces with an alpha value set by SDL_SetAlpha().
160 As always, RLE surfaces must be locked before pixel access is
161 allowed, and unlocked before any other SDL operations are done
164 The blit semantics for surfaces with and without alpha and colorkey
165 have now been defined:
169 alpha-blend (using alpha-channel).
170 SDL_SRCCOLORKEY ignored.
171 SDL_SRCALPHA not set:
173 if SDL_SRCCOLORKEY set, only copy the pixels matching the
174 RGB values of the source colour key, ignoring alpha in the
179 alpha-blend (using the source per-surface alpha value);
180 set destination alpha to opaque.
181 SDL_SRCALPHA not set:
182 copy RGB, set destination alpha to opaque.
184 if SDL_SRCCOLORKEY set, only copy the pixels matching the
189 alpha-blend (using the source alpha channel) the RGB values;
190 leave destination alpha untouched. [Note: is this correct?]
191 SDL_SRCCOLORKEY ignored.
192 SDL_SRCALPHA not set:
193 copy all of RGBA to the destination.
194 if SDL_SRCCOLORKEY set, only copy the pixels matching the
195 RGB values of the source colour key, ignoring alpha in the
200 alpha-blend (using the source per-surface alpha value).
201 SDL_SRCALPHA not set:
204 if SDL_SRCCOLORKEY set, only copy the pixels matching the
207 As a special case, blits from surfaces with per-surface alpha
208 value of 128 (50% transparency) are optimised and much faster
209 than other alpha values. This does not apply to surfaces with
210 alpha channels (per-pixel alpha).
212 New functions for manipulating the gamma of the display have
214 int SDL_SetGamma(float red, float green, float blue);
215 int SDL_SetGammaRamp(Uint8 *red, Uint8 *green, Uint8 *blue);
216 int SDL_GetGammaRamp(Uint8 *red, Uint8 *green, Uint8 *blue);
217 Gamma ramps are tables with 256 entries which map the screen color
218 components into actually displayed colors. For an example of
219 implementing gamma correction and gamma fades, see test/testgamma.c
220 Gamma control is not supported on all hardware.
223 The size of the SDL_CDtrack structure changed from 8 to 12 bytes
224 as the size of the length member was extended to 32 bits.
226 You can now use SDL for 2D blitting with a GL mode by passing the
227 SDL_OPENGLBLIT flag to SDL_SetVideoMode(). You can specify 16 or
228 32 bpp, and the data in the framebuffer is put into the GL scene
229 when you call SDL_UpdateRects(), and the scene will be visible
230 when you call SDL_GL_SwapBuffers().
232 Run the "testgl" test program with the -logo command line option
233 to see an example of this blending of 2D and 3D in SDL.
236 Added SDL_FreeRW() to the API, to complement SDL_AllocRW()
238 Added resizable window support - just add SDL_RESIZABLE to the
239 SDL_SetVideoMode() flags, and then wait for SDL_VIDEORESIZE events.
240 See SDL_events.h for details on the new SDL_ResizeEvent structure.
242 Added condition variable support, based on mutexes and semaphores.
249 The new function prototypes are in SDL_mutex.h
251 Added counting semaphore support, based on the mutex primitive.
252 SDL_CreateSemaphore()
253 SDL_DestroySemaphore()
259 The new function prototypes are in SDL_mutex.h
261 Added support for asynchronous blitting. To take advantage of this,
262 you must set the SDL_ASYNCBLIT flag when setting the video mode and
263 creating surfaces that you want accelerated in this way. You must
264 lock surfaces that have this flag set, and the lock will block until
265 any queued blits have completed.
267 Added YUV video overlay support.
268 The supported YUV formats are: YV12, IYUV, YUY2, UYVY, and YVYU.
269 This function creates an overlay surface:
270 SDL_CreateYUVOverlay()
271 You must lock and unlock the overlay to get access to the data:
272 SDL_LockYUVOverlay() SDL_UnlockYUVOverlay()
273 You can then display the overlay:
274 SDL_DisplayYUVOverlay()
275 You must free the overlay when you are done using it:
277 See SDL_video.h for the full function prototypes.
279 The joystick hat position constants have been changed:
280 Old constant New constant
281 ------------ ------------
291 The new constants are bitmasks, so you can check for the
292 individual axes like this:
293 if ( hat_position & SDL_HAT_UP ) {
295 and you'll catch left-up, up, and right-up.
298 Added multiple timer support:
299 SDL_AddTimer() and SDL_RemoveTimer()
301 SDL_WM_SetIcon() now respects the icon colorkey if mask is NULL.
304 Added initial OpenGL support.
305 First set GL attributes (such as RGB depth, alpha depth, etc.)
306 SDL_GL_SetAttribute()
307 Then call SDL_SetVideoMode() with the SDL_OPENGL flag.
308 Perform all of your normal GL drawing.
309 Finally swap the buffers with the new SDL function:
311 See the new 'testgl' test program for an example of using GL with SDL.
313 You can load GL extension functions by using the function:
314 SDL_GL_LoadProcAddress()
316 Added functions to initialize and cleanup specific SDL subsystems:
317 SDL_InitSubSystem() and SDL_QuitSubSystem()
319 Added user-defined event type:
326 This structure is in the "user" member of an SDL_Event.
328 Added a function to push events into the event queue:
331 Example of using the new SDL user-defined events:
335 event.type = SDL_USEREVENT;
336 event.user.code = my_event_code;
337 event.user.data1 = significant_data;
338 event.user.data2 = 0;
339 SDL_PushEvent(&event);
342 Added a function to get mouse deltas since last query:
343 SDL_GetRelativeMouseState()
345 Added a boolean datatype to SDL_types.h:
346 SDL_bool = { SDL_TRUE, SDL_FALSE }
348 Added a function to get the current audio status:
355 Added an AAlib driver (ASCII Art) - by Stephane Peter.
358 The input grab state is reset after each call to SDL_SetVideoMode().
359 The input is grabbed by default in fullscreen mode, and ungrabbed in
360 windowed mode. If you want to set input grab to a particular value,
361 you should set it after each call to SDL_SetVideoMode().
364 Exposed SDL_AudioInit(), SDL_VideoInit()
365 Added SDL_AudioDriverName() and SDL_VideoDriverName()
367 Added new window manager function:
368 SDL_WM_ToggleFullScreen()
369 This is currently implemented only on Linux
371 The ALT-ENTER code has been removed - it's not appropriate for a
372 lib to bind keys when they aren't even emergency escape sequences.
374 ALT-ENTER functionality can be implemented with the following code:
376 int Handle_AltEnter(const SDL_Event *event)
378 if ( event->type == SDL_KEYDOWN ) {
379 if ( (event->key.keysym.sym == SDLK_RETURN) &&
380 (event->key.keysym.mod & KMOD_ALT) ) {
381 SDL_WM_ToggleFullScreen(SDL_GetVideoSurface());
387 SDL_SetEventFilter(Handle_AltEnter);
390 Under X11, if you grab the input and hide the mouse cursor,
391 the mouse will go into a "relative motion" mode where you
392 will always get relative motion events no matter how far in
393 each direction you move the mouse - relative motion is not
394 bounded by the edges of the window (though the absolute values
395 of the mouse positions are clamped by the size of the window).
396 The SVGAlib, framebuffer console, and DirectInput drivers all
397 have this behavior naturally, and the GDI and BWindow drivers
398 never go into "relative motion" mode.
401 Added a function to enable keyboard repeat:
402 SDL_EnableKeyRepeat()
404 Added a function to grab the mouse and keyboard input
407 Added a function to iconify the window.
408 SDL_WM_IconifyWindow()
409 If this function succeeds, the application will receive an event
410 signaling SDL_APPACTIVE event
413 Added constants to SDL_audio.h for 16-bit native byte ordering:
414 AUDIO_U16SYS, AUDIO_S16SYS
422 A new function SDL_GetVideoSurface() has been added, and returns
423 a pointer to the current display surface.
425 SDL_AllocSurface() has been renamed SDL_CreateRGBSurface(), and
426 a new function SDL_CreateRGBSurfaceFrom() has been added to allow
427 creating an SDL surface from an existing pixel data buffer.
429 Added SDL_GetRGB() to the headers and documentation.
432 SDL_SetLibraryPath() is no longer meaningful, and has been removed.
435 A new flag for SDL_Init(), SDL_INIT_NOPARACHUTE, prevents SDL from
436 installing fatal signal handlers on operating systems that support
442 SDL_CreateColorCursor() has been removed. Color cursors should
443 be implemented as sprites, blitted by the application when the
444 cursor moves. To get smooth color cursor updates when the app
445 is busy, pass the SDL_INIT_EVENTTHREAD flag to SDL_Init(). This
446 allows you to handle the mouse motion in another thread from an
447 event filter function, but is currently only supported by Linux
448 and BeOS. Note that you'll have to protect the display surface
449 from multi-threaded access by using mutexes if you do this.
451 Thread-safe surface support has been removed from SDL.
452 This makes blitting somewhat faster, by removing SDL_MiddleBlit().
453 Code that used SDL_MiddleBlit() should use SDL_LowerBlit() instead.
454 You can make your surfaces thread-safe by allocating your own
455 mutex and making lock/unlock calls around accesses to your surface.
458 SDL_GetMouseState() now takes pointers to int rather than Uint16.
460 If you set the SDL_WINDOWID environment variable under UNIX X11,
461 SDL will use that as the main window instead of creating it's own.
462 This is an unsupported extension to SDL, and not portable at all.
465 Added a function SDL_SetLibraryPath() which can be used to specify
466 the directory containing the SDL dynamic libraries. This is useful
467 for commercial applications which ship with particular versions
468 of the libraries, and for security on multi-user systems.
469 If this function is not used, the default system directories are
470 searched using the native dynamic object loading mechanism.
472 In order to support C linkage under Visual C++, you must declare
473 main() without any return type:
474 main(int argc, char *argv[]) {
475 /* Do the program... */
478 C++ programs should also return a value if compiled under VC++.
480 The blit_endian member of the SDL_VideoInfo struct has been removed.
482 SDL_SymToASCII() has been replaced with SDL_GetKeyName(), so there
483 is now no longer any function to translate a keysym to a character.
485 The SDL_keysym structure has been extended with a 'scancode' and
486 'unicode' member. The 'scancode' is a hardware specific scancode
487 for the key that was pressed, and may be 0. The 'unicode' member
488 is a 16-bit UNICODE translation of the key that was pressed along
489 with any modifiers or compose keys that have been pressed.
490 If no UNICODE translation exists for the key, 'unicode' will be 0.
492 Added a function SDL_EnableUNICODE() to enable/disable UNICODE
493 translation of character keypresses. Translation defaults off.
495 To convert existing code to use the new API, change code which
496 uses SDL_SymToASCII() to get the keyname to use SDL_GetKeyName(),
497 and change code which uses it to get the ASCII value of a sym to
498 use the 'unicode' member of the event keysym.
501 There is partial support for 64-bit datatypes. I don't recommend
502 you use this if you have a choice, because 64-bit datatypes are not
503 supported on many platforms. On platforms for which it is supported,
504 the SDL_HAS_64BIT_TYPE C preprocessor define will be enabled, and
505 you can use the Uint64 and Sint64 datatypes.
507 Added functions to SDL_endian.h to support 64-bit datatypes:
508 SDL_SwapLE64(), SDL_SwapBE64(),
509 SDL_ReadLE64(), SDL_ReadBE64(), SDL_WriteLE64(), SDL_WriteBE64()
511 A new member "len_ratio" has been added to the SDL_AudioCVT structure,
512 and allows you to determine either the original buffer length or the
513 converted buffer length, given the other.
515 A new function SDL_FreeWAV() has been added to the API to free data
516 allocated by SDL_LoadWAV_RW(). This is necessary under Win32 since
517 the gcc compiled DLL uses a different heap than VC++ compiled apps.
519 SDL now has initial support for international keyboards using the
521 If a particular mapping is desired, you can set the DEFAULT_KEYBOARD
522 compile-time variable, or you can set the environment variable
523 "SDL_KEYBOARD" to a string identifying the keyboard mapping you desire.
524 The valid values for these variables can be found in SDL_keyboard.c
526 Full support for German and French keyboards under X11 is implemented.
529 The THREADED_EVENTS compile-time define has been replaced with the
530 SDL_INIT_EVENTTHREAD flag. If this flag is passed to SDL_Init(),
531 SDL will create a separate thread to perform input event handling.
532 If this flag is passed to SDL_Init(), and the OS doesn't support
533 event handling in a separate thread, SDL_Init() will fail.
534 Be sure to add calls to SDL_Delay() in your main thread to allow
535 the OS to schedule your event thread, or it may starve, leading
536 to slow event delivery and/or dropped events.
537 Currently MacOS and Win32 do not support this flag, while BeOS
538 and Linux do support it. I recommend that your application only
539 use this flag if absolutely necessary.
541 The SDL thread function passed to SDL_CreateThread() now returns a
542 status. This status can be retrieved by passing a non-NULL pointer
543 as the 'status' argument to SDL_WaitThread().
545 The volume parameter to SDL_MixAudio() has been increased in range
546 from (0-8) to (0-128)
548 SDL now has a data source abstraction which can encompass a file,
549 an area of memory, or any custom object you can envision. It uses
550 these abstractions, SDL_RWops, in the endian read/write functions,
551 and the built-in WAV and BMP file loaders. This means you can load
552 WAV chunks from memory mapped files, compressed archives, network
553 pipes, or anything else that has a data read abstraction.
555 There are three built-in data source abstractions:
556 SDL_RWFromFile(), SDL_RWFromFP(), SDL_RWFromMem()
557 along with a generic data source allocation function:
559 These data sources can be used like stdio file pointers with the
560 following convenience functions:
561 SDL_RWseek(), SDL_RWread(), SDL_RWwrite(), SDL_RWclose()
562 These functions are defined in the new header file "SDL_rwops.h"
564 The endian swapping functions have been turned into macros for speed
565 and SDL_CalculateEndian() has been removed. SDL_endian.h now defines
566 SDL_BYTEORDER as either SDL_BIG_ENDIAN or SDL_LIL_ENDIAN depending on
567 the endianness of the host system.
569 The endian read/write functions now take an SDL_RWops pointer
570 instead of a stdio FILE pointer, to support the new data source
573 The SDL_*LoadWAV() functions have been replaced with a single
574 SDL_LoadWAV_RW() function that takes a SDL_RWops pointer as it's
575 first parameter, and a flag whether or not to automatically
576 free it as the second parameter. SDL_LoadWAV() is a macro for
577 backward compatibility and convenience:
578 SDL_LoadWAV_RW(SDL_RWFromFile("sample.wav", "rb"), 1, ...);
580 The SDL_*LoadBMP()/SDL_*SaveBMP() functions have each been replaced
581 with a single function that takes a SDL_RWops pointer as it's
582 first parameter, and a flag whether or not to automatically
583 free it as the second parameter. SDL_LoadBMP() and SDL_SaveBMP()
584 are macros for backward compatibility and convenience:
585 SDL_LoadBMP_RW(SDL_RWFromFile("sample.bmp", "rb"), 1, ...);
586 SDL_SaveBMP_RW(SDL_RWFromFile("sample.bmp", "wb"), 1, ...);
587 Note that these functions use SDL_RWseek() extensively, and should
588 not be used on pipes or other non-seekable data sources.
591 The Linux SDL_SysWMInfo and SDL_SysWMMsg structures have been
592 extended to support multiple types of display drivers, as well as
593 safe access to the X11 display when THREADED_EVENTS is enabled.
594 The new structures are documented in the SDL_syswm.h header file.
596 Thanks to John Elliott <jce@seasip.demon.co.uk>, the UK keyboard
597 should now work properly, as well as the "Windows" keys on US
600 The Linux CD-ROM code now reads the CD-ROM devices from /etc/fstab
601 instead of trying to open each block device on the system.
602 The CD must be listed in /etc/fstab as using the iso9660 filesystem.
604 On Linux, if you define THREADED_EVENTS at compile time, a separate
605 thread will be spawned to gather X events asynchronously from the
606 graphics updates. This hasn't been extensively tested, but it does
607 provide a means of handling keyboard and mouse input in a separate
608 thread from the graphics thread. (This is now enabled by default.)
610 A special access function SDL_PeepEvents() allows you to manipulate
611 the event queue in a thread-safe manner, including peeking at events,
612 removing events of a specified type, and adding new events of arbitrary
613 type to the queue (use the new 'user' member of the SDL_Event type).
615 If you use SDL_PeepEvents() to gather events, then the main graphics
616 thread needs to call SDL_PumpEvents() periodically to drive the event
617 loop and generate input events. This is not necessary if SDL has been
618 compiled with THREADED_EVENTS defined, but doesn't hurt.
620 A new function SDL_ThreadID() returns the identifier associated with
624 The AUDIO_STEREO format flag has been replaced with a new 'channels'
625 member of the SDL_AudioSpec structure. The channels are 1 for mono
626 audio, and 2 for stereo audio. In the future more channels may be
627 supported for 3D surround sound.
629 The SDL_MixAudio() function now takes an additional volume parameter,
630 which should be set to SDL_MIX_MAXVOLUME for compatibility with the
633 The CD-ROM functions which take a 'cdrom' parameter can now be
634 passed NULL, and will act on the last successfully opened CD-ROM.
637 No changes, bugfixes only.
640 No changes, bugfixes only.
643 Added a fast rectangle fill function: SDL_FillRect()
645 Addition of a useful function for getting info on the video hardware:
646 const SDL_VideoInfo *SDL_GetVideoInfo(void)
647 This function replaces SDL_GetDisplayFormat().
649 Initial support for double-buffering:
650 Use the SDL_DOUBLEBUF flag in SDL_SetVideoMode()
651 Update the screen with a new function: SDL_Flip()
653 SDL_AllocSurface() takes two new flags:
654 SDL_SRCCOLORKEY means that the surface will be used for colorkey blits
655 and if the hardware supports hardware acceleration of colorkey blits
656 between two surfaces in video memory, to place the surface in video
657 memory if possible, otherwise it will be placed in system memory.
658 SDL_SRCALPHA means that the surface will be used for alpha blits and
659 if the hardware supports hardware acceleration of alpha blits between
660 two surfaces in video memory, to place the surface in video memory
661 if possible, otherwise it will be placed in system memory.
662 SDL_HWSURFACE now means that the surface will be created with the
663 same format as the display surface, since having surfaces in video
664 memory is only useful for fast blitting to the screen, and you can't
665 blit surfaces with different surface formats in video memory.
668 You can now pass a NULL mask to SDL_WM_SetIcon(), and it will assume
669 that the icon consists of the entire image.
671 SDL_LowerBlit() is back -- but don't use it on the display surface.
672 It is exactly the same as SDL_MiddleBlit(), but doesn't check for
675 Added SDL_FPLoadBMP(), SDL_FPSaveBMP(), SDL_FPLoadWAV(), which take
676 a FILE pointer instead of a file name.
678 Added CD-ROM audio control API:
692 No changes, bugfixes only.
695 Mouse motion event now includes relative motion information:
696 Sint16 event->motion.xrel, Sint16 event->motion.yrel
698 X11 keyrepeat handling can be disabled by defining IGNORE_X_KEYREPEAT
699 (Add -DIGNORE_X_KEYREPEAT to CFLAGS line in obj/x11Makefile)
702 No changes, bugfixes only.
705 Removed SDL_MapSurface() and SDL_UnmapSurface() -- surfaces are now
706 automatically mapped on blit.