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Revision 81 - (show annotations)
Wed May 27 20:33:03 2009 UTC (10 years, 3 months ago) by Jede
File size: 27506 byte(s)
Ajouts des libs windows
1
2 This is a list of API changes in SDL's version history.
3
4 Version 1.0:
5
6 1.2.13:
7 Added SDL_BUTTON_X1 and SDL_BUTTON_X2 constants.
8
9 1.2.12:
10 Added SDL_VIDEO_ALLOW_SCREENSAVER to override SDL's disabling
11 of the screensaver on Mac OS X and X11.
12
13 1.2.10:
14 If SDL_OpenAudio() is passed zero for the desired format
15 fields, the following environment variables will be used
16 to fill them in:
17 SDL_AUDIO_FREQUENCY
18 SDL_AUDIO_FORMAT
19 SDL_AUDIO_CHANNELS
20 SDL_AUDIO_SAMPLES
21 If an environment variable is not specified, it will be set
22 to a reasonable default value.
23
24 Added support for the SDL_VIDEO_FULLSCREEN_HEAD environment
25 variable, currently supported on X11 Xinerama configurations.
26
27 Added SDL_GL_SWAP_CONTROL to wait for vsync in OpenGL applications.
28
29 Added SDL_GL_ACCELERATED_VISUAL to guarantee hardware acceleration.
30
31 Added current_w and current_h to the SDL_VideoInfo structure,
32 which is set to the desktop resolution during video intialization,
33 and then set to the current resolution when a video mode is set.
34
35 SDL_SetVideoMode() now accepts 0 for width or height and will use
36 the current video mode (or the desktop mode if no mode has been set.)
37
38 Added SDL_GetKeyRepeat()
39
40 Added SDL_config.h, with defaults for various build environments.
41
42 1.2.7:
43 Added CPU feature detection functions to SDL_cpuinfo.h:
44 SDL_HasRDTSC(), SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE(),
45 SDL_HasAltiVec()
46 Added function to create RWops from const memory: SDL_RWFromConstMem()
47
48 1.2.6:
49 Added SDL_LoadObject(), SDL_LoadFunction(), and SDL_UnloadObject()
50
51 Added SDL_GL_MULTISAMPLEBUFFERS and SDL_GL_MULTISAMPLESAMPLES for FSAA
52
53 1.2.5:
54 Added SDL_BUTTON_WHEELUP (4) and SDL_BUTTON_WHEELDOWN (5)
55
56 Added SDL_GL_STEREO for stereoscopic OpenGL contexts
57
58 1.2.0:
59 Added SDL_VIDEOEXPOSE event to signal that the screen needs to
60 be redrawn. This is currently only delivered to OpenGL windows
61 on X11, though it may be delivered in the future when the video
62 memory is lost under DirectX.
63
64 1.1.8:
65 You can pass SDL_NOFRAME to SDL_VideoMode() to create a window
66 that has no title bar or frame decoration. Fullscreen video
67 modes automatically have this flag set.
68
69 Added a function to query the clipping rectangle for a surface:
70 void SDL_GetClipRect(SDL_Surface *surface, SDL_Rect *rect)
71
72 Added a function to query the current event filter:
73 SDL_EventFilter SDL_GetEventFilter(void)
74
75 If you pass -1 to SDL_ShowCursor(), it won't change the current
76 cursor visibility state, but will still return it.
77
78 SDL_LockSurface() and SDL_UnlockSurface() are recursive, meaning
79 you can nest them as deep as you want, as long as each lock call
80 has a matching unlock call. The surface remains locked until the
81 last matching unlock call.
82
83 Note that you may not blit to or from a locked surface.
84
85 1.1.7:
86 The SDL_SetGammaRamp() and SDL_GetGammaRamp() functions now take
87 arrays of Uint16 values instead of Uint8 values. For the most part,
88 you can just take your old values and shift them up 8 bits to get
89 new correct values for your gamma ramps.
90
91 You can pass SDL_RLEACCEL in flags passed to SDL_ConvertSurface()
92 and SDL will try to RLE accelerate colorkey and alpha blits in the
93 resulting surface.
94
95 1.1.6:
96 Added a function to return the thread ID of a specific thread:
97 Uint32 SDL_GetThreadID(SDL_Thread *thread)
98 If 'thread' is NULL, this function returns the id for this thread.
99
100 1.1.5:
101 The YUV overlay structure has been changed to use an array of
102 pitches and pixels representing the planes of a YUV image, to
103 better enable hardware acceleration. The YV12 and IYUV formats
104 each have three planes, corresponding to the Y, U, and V portions
105 of the image, while packed pixel YUV formats just have one plane.
106
107 For palettized mode (8bpp), the screen colormap is now split in
108 a physical and a logical palette. The physical palette determines
109 what colours the screen pixels will get when displayed, and the
110 logical palette controls the mapping from blits to/from the screen.
111 A new function, SDL_SetPalette() has been added to change
112 logical and physical palettes separately. SDL_SetColors() works
113 just as before, and is equivalent to calling SDL_SetPalette() with
114 a flag argument of (SDL_LOGPAL|SDL_PHYSPAL).
115
116 SDL_BlitSurface() no longer modifies the source rectangle, only the
117 destination rectangle. The width/height members of the destination
118 rectangle are ignored, only the position is used.
119
120 The old source clipping function SDL_SetClipping() has been replaced
121 with a more useful function to set the destination clipping rectangle:
122 SDL_bool SDL_SetClipRect(SDL_Surface *surface, SDL_Rect *rect)
123
124 Added a function to see what subsystems have been initialized:
125 Uint32 SDL_WasInit(Uint32 flags)
126
127 The Big Alpha Flip: SDL now treats alpha as opacity like everybody
128 else, and not as transparency:
129
130 A new cpp symbol: SDL_ALPHA_OPAQUE is defined as 255
131 A new cpp symbol: SDL_ALPHA_TRANSPARENT is defined as 0
132 Values between 0 and 255 vary from fully transparent to fully opaque.
133
134 New functions:
135 SDL_DisplayFormatAlpha()
136 Returns a surface converted to a format with alpha-channel
137 that can be blit efficiently to the screen. (In other words,
138 like SDL_DisplayFormat() but the resulting surface has
139 an alpha channel.) This is useful for surfaces with alpha.
140 SDL_MapRGBA()
141 Works as SDL_MapRGB() but takes an additional alpha parameter.
142 SDL_GetRGBA()
143 Works as SDL_GetRGB() but also returns the alpha value
144 (SDL_ALPHA_OPAQUE for formats without an alpha channel)
145
146 Both SDL_GetRGB() and SDL_GetRGBA() now always return values in
147 the [0..255] interval. Previously, SDL_GetRGB() would return
148 (0xf8, 0xfc, 0xf8) for a completely white pixel in RGB565 format.
149 (N.B.: This is broken for bit fields < 3 bits.)
150
151 SDL_MapRGB() returns pixels in which the alpha channel is set opaque.
152
153 SDL_SetAlpha() can now be used for both setting the per-surface
154 alpha, using the new way of thinking of alpha, and also to enable
155 and disable per-pixel alpha blending for surfaces with an alpha
156 channel:
157 To disable alpha blending:
158 SDL_SetAlpha(surface, 0, 0);
159 To re-enable alpha blending:
160 SDL_SetAlpha(surface, SDL_SRCALPHA, 0);
161 Surfaces with an alpha channel have blending enabled by default.
162
163 SDL_SetAlpha() now accepts SDL_RLEACCEL as a flag, which requests
164 RLE acceleration of blits, just as like with SDL_SetColorKey().
165 This flag can be set for both surfaces with an alpha channel
166 and surfaces with an alpha value set by SDL_SetAlpha().
167 As always, RLE surfaces must be locked before pixel access is
168 allowed, and unlocked before any other SDL operations are done
169 on it.
170
171 The blit semantics for surfaces with and without alpha and colorkey
172 have now been defined:
173
174 RGBA->RGB:
175 SDL_SRCALPHA set:
176 alpha-blend (using alpha-channel).
177 SDL_SRCCOLORKEY ignored.
178 SDL_SRCALPHA not set:
179 copy RGB.
180 if SDL_SRCCOLORKEY set, only copy the pixels matching the
181 RGB values of the source colour key, ignoring alpha in the
182 comparison.
183
184 RGB->RGBA:
185 SDL_SRCALPHA set:
186 alpha-blend (using the source per-surface alpha value);
187 set destination alpha to opaque.
188 SDL_SRCALPHA not set:
189 copy RGB, set destination alpha to opaque.
190 both:
191 if SDL_SRCCOLORKEY set, only copy the pixels matching the
192 source colour key.
193
194 RGBA->RGBA:
195 SDL_SRCALPHA set:
196 alpha-blend (using the source alpha channel) the RGB values;
197 leave destination alpha untouched. [Note: is this correct?]
198 SDL_SRCCOLORKEY ignored.
199 SDL_SRCALPHA not set:
200 copy all of RGBA to the destination.
201 if SDL_SRCCOLORKEY set, only copy the pixels matching the
202 RGB values of the source colour key, ignoring alpha in the
203 comparison.
204
205 RGB->RGB:
206 SDL_SRCALPHA set:
207 alpha-blend (using the source per-surface alpha value).
208 SDL_SRCALPHA not set:
209 copy RGB.
210 both:
211 if SDL_SRCCOLORKEY set, only copy the pixels matching the
212 source colour key.
213
214 As a special case, blits from surfaces with per-surface alpha
215 value of 128 (50% transparency) are optimised and much faster
216 than other alpha values. This does not apply to surfaces with
217 alpha channels (per-pixel alpha).
218
219 New functions for manipulating the gamma of the display have
220 been added:
221 int SDL_SetGamma(float red, float green, float blue);
222 int SDL_SetGammaRamp(Uint8 *red, Uint8 *green, Uint8 *blue);
223 int SDL_GetGammaRamp(Uint8 *red, Uint8 *green, Uint8 *blue);
224 Gamma ramps are tables with 256 entries which map the screen color
225 components into actually displayed colors. For an example of
226 implementing gamma correction and gamma fades, see test/testgamma.c
227 Gamma control is not supported on all hardware.
228
229 1.1.4:
230 The size of the SDL_CDtrack structure changed from 8 to 12 bytes
231 as the size of the length member was extended to 32 bits.
232
233 You can now use SDL for 2D blitting with a GL mode by passing the
234 SDL_OPENGLBLIT flag to SDL_SetVideoMode(). You can specify 16 or
235 32 bpp, and the data in the framebuffer is put into the GL scene
236 when you call SDL_UpdateRects(), and the scene will be visible
237 when you call SDL_GL_SwapBuffers().
238
239 Run the "testgl" test program with the -logo command line option
240 to see an example of this blending of 2D and 3D in SDL.
241
242 1.1.3:
243 Added SDL_FreeRW() to the API, to complement SDL_AllocRW()
244
245 Added resizable window support - just add SDL_RESIZABLE to the
246 SDL_SetVideoMode() flags, and then wait for SDL_VIDEORESIZE events.
247 See SDL_events.h for details on the new SDL_ResizeEvent structure.
248
249 Added condition variable support, based on mutexes and semaphores.
250 SDL_CreateCond()
251 SDL_DestroyCond()
252 SDL_CondSignal()
253 SDL_CondBroadcast()
254 SDL_CondWait()
255 SDL_CondTimedWait()
256 The new function prototypes are in SDL_mutex.h
257
258 Added counting semaphore support, based on the mutex primitive.
259 SDL_CreateSemaphore()
260 SDL_DestroySemaphore()
261 SDL_SemWait()
262 SDL_SemTryWait()
263 SDL_SemWaitTimeout()
264 SDL_SemPost()
265 SDL_SemValue()
266 The new function prototypes are in SDL_mutex.h
267
268 Added support for asynchronous blitting. To take advantage of this,
269 you must set the SDL_ASYNCBLIT flag when setting the video mode and
270 creating surfaces that you want accelerated in this way. You must
271 lock surfaces that have this flag set, and the lock will block until
272 any queued blits have completed.
273
274 Added YUV video overlay support.
275 The supported YUV formats are: YV12, IYUV, YUY2, UYVY, and YVYU.
276 This function creates an overlay surface:
277 SDL_CreateYUVOverlay()
278 You must lock and unlock the overlay to get access to the data:
279 SDL_LockYUVOverlay() SDL_UnlockYUVOverlay()
280 You can then display the overlay:
281 SDL_DisplayYUVOverlay()
282 You must free the overlay when you are done using it:
283 SDL_FreeYUVOverlay()
284 See SDL_video.h for the full function prototypes.
285
286 The joystick hat position constants have been changed:
287 Old constant New constant
288 ------------ ------------
289 0 SDL_HAT_CENTERED
290 1 SDL_HAT_UP
291 2 SDL_HAT_RIGHTUP
292 3 SDL_HAT_RIGHT
293 4 SDL_HAT_RIGHTDOWN
294 5 SDL_HAT_DOWN
295 6 SDL_HAT_LEFTDOWN
296 7 SDL_HAT_LEFT
297 8 SDL_HAT_LEFTUP
298 The new constants are bitmasks, so you can check for the
299 individual axes like this:
300 if ( hat_position & SDL_HAT_UP ) {
301 }
302 and you'll catch left-up, up, and right-up.
303
304 1.1.2:
305 Added multiple timer support:
306 SDL_AddTimer() and SDL_RemoveTimer()
307
308 SDL_WM_SetIcon() now respects the icon colorkey if mask is NULL.
309
310 1.1.0:
311 Added initial OpenGL support.
312 First set GL attributes (such as RGB depth, alpha depth, etc.)
313 SDL_GL_SetAttribute()
314 Then call SDL_SetVideoMode() with the SDL_OPENGL flag.
315 Perform all of your normal GL drawing.
316 Finally swap the buffers with the new SDL function:
317 SDL_GL_SwapBuffers()
318 See the new 'testgl' test program for an example of using GL with SDL.
319
320 You can load GL extension functions by using the function:
321 SDL_GL_LoadProcAddress()
322
323 Added functions to initialize and cleanup specific SDL subsystems:
324 SDL_InitSubSystem() and SDL_QuitSubSystem()
325
326 Added user-defined event type:
327 typedef struct {
328 Uint8 type;
329 int code;
330 void *data1;
331 void *data2;
332 } SDL_UserEvent;
333 This structure is in the "user" member of an SDL_Event.
334
335 Added a function to push events into the event queue:
336 SDL_PushEvent()
337
338 Example of using the new SDL user-defined events:
339 {
340 SDL_Event event;
341
342 event.type = SDL_USEREVENT;
343 event.user.code = my_event_code;
344 event.user.data1 = significant_data;
345 event.user.data2 = 0;
346 SDL_PushEvent(&event);
347 }
348
349 Added a function to get mouse deltas since last query:
350 SDL_GetRelativeMouseState()
351
352 Added a boolean datatype to SDL_types.h:
353 SDL_bool = { SDL_TRUE, SDL_FALSE }
354
355 Added a function to get the current audio status:
356 SDL_GetAudioState();
357 It returns one of:
358 SDL_AUDIO_STOPPED,
359 SDL_AUDIO_PLAYING,
360 SDL_AUDIO_PAUSED
361
362 Added an AAlib driver (ASCII Art) - by Stephane Peter.
363
364 1.0.6:
365 The input grab state is reset after each call to SDL_SetVideoMode().
366 The input is grabbed by default in fullscreen mode, and ungrabbed in
367 windowed mode. If you want to set input grab to a particular value,
368 you should set it after each call to SDL_SetVideoMode().
369
370 1.0.5:
371 Exposed SDL_AudioInit(), SDL_VideoInit()
372 Added SDL_AudioDriverName() and SDL_VideoDriverName()
373
374 Added new window manager function:
375 SDL_WM_ToggleFullScreen()
376 This is currently implemented only on Linux
377
378 The ALT-ENTER code has been removed - it's not appropriate for a
379 lib to bind keys when they aren't even emergency escape sequences.
380
381 ALT-ENTER functionality can be implemented with the following code:
382
383 int Handle_AltEnter(const SDL_Event *event)
384 {
385 if ( event->type == SDL_KEYDOWN ) {
386 if ( (event->key.keysym.sym == SDLK_RETURN) &&
387 (event->key.keysym.mod & KMOD_ALT) ) {
388 SDL_WM_ToggleFullScreen(SDL_GetVideoSurface());
389 return(0);
390 }
391 }
392 return(1);
393 }
394 SDL_SetEventFilter(Handle_AltEnter);
395
396 1.0.3:
397 Under X11, if you grab the input and hide the mouse cursor,
398 the mouse will go into a "relative motion" mode where you
399 will always get relative motion events no matter how far in
400 each direction you move the mouse - relative motion is not
401 bounded by the edges of the window (though the absolute values
402 of the mouse positions are clamped by the size of the window).
403 The SVGAlib, framebuffer console, and DirectInput drivers all
404 have this behavior naturally, and the GDI and BWindow drivers
405 never go into "relative motion" mode.
406
407 1.0.2:
408 Added a function to enable keyboard repeat:
409 SDL_EnableKeyRepeat()
410
411 Added a function to grab the mouse and keyboard input
412 SDL_WM_GrabInput()
413
414 Added a function to iconify the window.
415 SDL_WM_IconifyWindow()
416 If this function succeeds, the application will receive an event
417 signaling SDL_APPACTIVE event
418
419 1.0.1:
420 Added constants to SDL_audio.h for 16-bit native byte ordering:
421 AUDIO_U16SYS, AUDIO_S16SYS
422
423 1.0.0:
424 New public release
425
426 Version 0.11:
427
428 0.11.5:
429 A new function SDL_GetVideoSurface() has been added, and returns
430 a pointer to the current display surface.
431
432 SDL_AllocSurface() has been renamed SDL_CreateRGBSurface(), and
433 a new function SDL_CreateRGBSurfaceFrom() has been added to allow
434 creating an SDL surface from an existing pixel data buffer.
435
436 Added SDL_GetRGB() to the headers and documentation.
437
438 0.11.4:
439 SDL_SetLibraryPath() is no longer meaningful, and has been removed.
440
441 0.11.3:
442 A new flag for SDL_Init(), SDL_INIT_NOPARACHUTE, prevents SDL from
443 installing fatal signal handlers on operating systems that support
444 them.
445
446 Version 0.9:
447
448 0.9.15:
449 SDL_CreateColorCursor() has been removed. Color cursors should
450 be implemented as sprites, blitted by the application when the
451 cursor moves. To get smooth color cursor updates when the app
452 is busy, pass the SDL_INIT_EVENTTHREAD flag to SDL_Init(). This
453 allows you to handle the mouse motion in another thread from an
454 event filter function, but is currently only supported by Linux
455 and BeOS. Note that you'll have to protect the display surface
456 from multi-threaded access by using mutexes if you do this.
457
458 Thread-safe surface support has been removed from SDL.
459 This makes blitting somewhat faster, by removing SDL_MiddleBlit().
460 Code that used SDL_MiddleBlit() should use SDL_LowerBlit() instead.
461 You can make your surfaces thread-safe by allocating your own
462 mutex and making lock/unlock calls around accesses to your surface.
463
464 0.9.14:
465 SDL_GetMouseState() now takes pointers to int rather than Uint16.
466
467 If you set the SDL_WINDOWID environment variable under UNIX X11,
468 SDL will use that as the main window instead of creating it's own.
469 This is an unsupported extension to SDL, and not portable at all.
470
471 0.9.13:
472 Added a function SDL_SetLibraryPath() which can be used to specify
473 the directory containing the SDL dynamic libraries. This is useful
474 for commercial applications which ship with particular versions
475 of the libraries, and for security on multi-user systems.
476 If this function is not used, the default system directories are
477 searched using the native dynamic object loading mechanism.
478
479 In order to support C linkage under Visual C++, you must declare
480 main() without any return type:
481 main(int argc, char *argv[]) {
482 /* Do the program... */
483 return(0);
484 }
485 C++ programs should also return a value if compiled under VC++.
486
487 The blit_endian member of the SDL_VideoInfo struct has been removed.
488
489 SDL_SymToASCII() has been replaced with SDL_GetKeyName(), so there
490 is now no longer any function to translate a keysym to a character.
491
492 The SDL_keysym structure has been extended with a 'scancode' and
493 'unicode' member. The 'scancode' is a hardware specific scancode
494 for the key that was pressed, and may be 0. The 'unicode' member
495 is a 16-bit UNICODE translation of the key that was pressed along
496 with any modifiers or compose keys that have been pressed.
497 If no UNICODE translation exists for the key, 'unicode' will be 0.
498
499 Added a function SDL_EnableUNICODE() to enable/disable UNICODE
500 translation of character keypresses. Translation defaults off.
501
502 To convert existing code to use the new API, change code which
503 uses SDL_SymToASCII() to get the keyname to use SDL_GetKeyName(),
504 and change code which uses it to get the ASCII value of a sym to
505 use the 'unicode' member of the event keysym.
506
507 0.9.12:
508 There is partial support for 64-bit datatypes. I don't recommend
509 you use this if you have a choice, because 64-bit datatypes are not
510 supported on many platforms. On platforms for which it is supported,
511 the SDL_HAS_64BIT_TYPE C preprocessor define will be enabled, and
512 you can use the Uint64 and Sint64 datatypes.
513
514 Added functions to SDL_endian.h to support 64-bit datatypes:
515 SDL_SwapLE64(), SDL_SwapBE64(),
516 SDL_ReadLE64(), SDL_ReadBE64(), SDL_WriteLE64(), SDL_WriteBE64()
517
518 A new member "len_ratio" has been added to the SDL_AudioCVT structure,
519 and allows you to determine either the original buffer length or the
520 converted buffer length, given the other.
521
522 A new function SDL_FreeWAV() has been added to the API to free data
523 allocated by SDL_LoadWAV_RW(). This is necessary under Win32 since
524 the gcc compiled DLL uses a different heap than VC++ compiled apps.
525
526 SDL now has initial support for international keyboards using the
527 Latin character set.
528 If a particular mapping is desired, you can set the DEFAULT_KEYBOARD
529 compile-time variable, or you can set the environment variable
530 "SDL_KEYBOARD" to a string identifying the keyboard mapping you desire.
531 The valid values for these variables can be found in SDL_keyboard.c
532
533 Full support for German and French keyboards under X11 is implemented.
534
535 0.9.11:
536 The THREADED_EVENTS compile-time define has been replaced with the
537 SDL_INIT_EVENTTHREAD flag. If this flag is passed to SDL_Init(),
538 SDL will create a separate thread to perform input event handling.
539 If this flag is passed to SDL_Init(), and the OS doesn't support
540 event handling in a separate thread, SDL_Init() will fail.
541 Be sure to add calls to SDL_Delay() in your main thread to allow
542 the OS to schedule your event thread, or it may starve, leading
543 to slow event delivery and/or dropped events.
544 Currently MacOS and Win32 do not support this flag, while BeOS
545 and Linux do support it. I recommend that your application only
546 use this flag if absolutely necessary.
547
548 The SDL thread function passed to SDL_CreateThread() now returns a
549 status. This status can be retrieved by passing a non-NULL pointer
550 as the 'status' argument to SDL_WaitThread().
551
552 The volume parameter to SDL_MixAudio() has been increased in range
553 from (0-8) to (0-128)
554
555 SDL now has a data source abstraction which can encompass a file,
556 an area of memory, or any custom object you can envision. It uses
557 these abstractions, SDL_RWops, in the endian read/write functions,
558 and the built-in WAV and BMP file loaders. This means you can load
559 WAV chunks from memory mapped files, compressed archives, network
560 pipes, or anything else that has a data read abstraction.
561
562 There are three built-in data source abstractions:
563 SDL_RWFromFile(), SDL_RWFromFP(), SDL_RWFromMem()
564 along with a generic data source allocation function:
565 SDL_AllocRW()
566 These data sources can be used like stdio file pointers with the
567 following convenience functions:
568 SDL_RWseek(), SDL_RWread(), SDL_RWwrite(), SDL_RWclose()
569 These functions are defined in the new header file "SDL_rwops.h"
570
571 The endian swapping functions have been turned into macros for speed
572 and SDL_CalculateEndian() has been removed. SDL_endian.h now defines
573 SDL_BYTEORDER as either SDL_BIG_ENDIAN or SDL_LIL_ENDIAN depending on
574 the endianness of the host system.
575
576 The endian read/write functions now take an SDL_RWops pointer
577 instead of a stdio FILE pointer, to support the new data source
578 abstraction.
579
580 The SDL_*LoadWAV() functions have been replaced with a single
581 SDL_LoadWAV_RW() 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_LoadWAV() is a macro for
584 backward compatibility and convenience:
585 SDL_LoadWAV_RW(SDL_RWFromFile("sample.wav", "rb"), 1, ...);
586
587 The SDL_*LoadBMP()/SDL_*SaveBMP() functions have each been replaced
588 with a single function that takes a SDL_RWops pointer as it's
589 first parameter, and a flag whether or not to automatically
590 free it as the second parameter. SDL_LoadBMP() and SDL_SaveBMP()
591 are macros for backward compatibility and convenience:
592 SDL_LoadBMP_RW(SDL_RWFromFile("sample.bmp", "rb"), 1, ...);
593 SDL_SaveBMP_RW(SDL_RWFromFile("sample.bmp", "wb"), 1, ...);
594 Note that these functions use SDL_RWseek() extensively, and should
595 not be used on pipes or other non-seekable data sources.
596
597 0.9.10:
598 The Linux SDL_SysWMInfo and SDL_SysWMMsg structures have been
599 extended to support multiple types of display drivers, as well as
600 safe access to the X11 display when THREADED_EVENTS is enabled.
601 The new structures are documented in the SDL_syswm.h header file.
602
603 Thanks to John Elliott <jce@seasip.demon.co.uk>, the UK keyboard
604 should now work properly, as well as the "Windows" keys on US
605 keyboards.
606
607 The Linux CD-ROM code now reads the CD-ROM devices from /etc/fstab
608 instead of trying to open each block device on the system.
609 The CD must be listed in /etc/fstab as using the iso9660 filesystem.
610
611 On Linux, if you define THREADED_EVENTS at compile time, a separate
612 thread will be spawned to gather X events asynchronously from the
613 graphics updates. This hasn't been extensively tested, but it does
614 provide a means of handling keyboard and mouse input in a separate
615 thread from the graphics thread. (This is now enabled by default.)
616
617 A special access function SDL_PeepEvents() allows you to manipulate
618 the event queue in a thread-safe manner, including peeking at events,
619 removing events of a specified type, and adding new events of arbitrary
620 type to the queue (use the new 'user' member of the SDL_Event type).
621
622 If you use SDL_PeepEvents() to gather events, then the main graphics
623 thread needs to call SDL_PumpEvents() periodically to drive the event
624 loop and generate input events. This is not necessary if SDL has been
625 compiled with THREADED_EVENTS defined, but doesn't hurt.
626
627 A new function SDL_ThreadID() returns the identifier associated with
628 the current thread.
629
630 0.9.9:
631 The AUDIO_STEREO format flag has been replaced with a new 'channels'
632 member of the SDL_AudioSpec structure. The channels are 1 for mono
633 audio, and 2 for stereo audio. In the future more channels may be
634 supported for 3D surround sound.
635
636 The SDL_MixAudio() function now takes an additional volume parameter,
637 which should be set to SDL_MIX_MAXVOLUME for compatibility with the
638 original function.
639
640 The CD-ROM functions which take a 'cdrom' parameter can now be
641 passed NULL, and will act on the last successfully opened CD-ROM.
642
643 0.9.8:
644 No changes, bugfixes only.
645
646 0.9.7:
647 No changes, bugfixes only.
648
649 0.9.6:
650 Added a fast rectangle fill function: SDL_FillRect()
651
652 Addition of a useful function for getting info on the video hardware:
653 const SDL_VideoInfo *SDL_GetVideoInfo(void)
654 This function replaces SDL_GetDisplayFormat().
655
656 Initial support for double-buffering:
657 Use the SDL_DOUBLEBUF flag in SDL_SetVideoMode()
658 Update the screen with a new function: SDL_Flip()
659
660 SDL_AllocSurface() takes two new flags:
661 SDL_SRCCOLORKEY means that the surface will be used for colorkey blits
662 and if the hardware supports hardware acceleration of colorkey blits
663 between two surfaces in video memory, to place the surface in video
664 memory if possible, otherwise it will be placed in system memory.
665 SDL_SRCALPHA means that the surface will be used for alpha blits and
666 if the hardware supports hardware acceleration of alpha blits between
667 two surfaces in video memory, to place the surface in video memory
668 if possible, otherwise it will be placed in system memory.
669 SDL_HWSURFACE now means that the surface will be created with the
670 same format as the display surface, since having surfaces in video
671 memory is only useful for fast blitting to the screen, and you can't
672 blit surfaces with different surface formats in video memory.
673
674 0.9.5:
675 You can now pass a NULL mask to SDL_WM_SetIcon(), and it will assume
676 that the icon consists of the entire image.
677
678 SDL_LowerBlit() is back -- but don't use it on the display surface.
679 It is exactly the same as SDL_MiddleBlit(), but doesn't check for
680 thread safety.
681
682 Added SDL_FPLoadBMP(), SDL_FPSaveBMP(), SDL_FPLoadWAV(), which take
683 a FILE pointer instead of a file name.
684
685 Added CD-ROM audio control API:
686 SDL_CDNumDrives()
687 SDL_CDName()
688 SDL_CDOpen()
689 SDL_CDStatus()
690 SDL_CDPlayTracks()
691 SDL_CDPlay()
692 SDL_CDPause()
693 SDL_CDResume()
694 SDL_CDStop()
695 SDL_CDEject()
696 SDL_CDClose()
697
698 0.9.4:
699 No changes, bugfixes only.
700
701 0.9.3:
702 Mouse motion event now includes relative motion information:
703 Sint16 event->motion.xrel, Sint16 event->motion.yrel
704
705 X11 keyrepeat handling can be disabled by defining IGNORE_X_KEYREPEAT
706 (Add -DIGNORE_X_KEYREPEAT to CFLAGS line in obj/x11Makefile)
707
708 0.9.2:
709 No changes, bugfixes only.
710
711 0.9.1:
712 Removed SDL_MapSurface() and SDL_UnmapSurface() -- surfaces are now
713 automatically mapped on blit.
714
715 0.8.0:
716 SDL stable release

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