From 442dfaf69466d85803f2a5968d23913b1ece52a9 Mon Sep 17 00:00:00 2001 From: Sam Lantinga Date: Wed, 19 Jan 2011 22:20:44 -0800 Subject: [PATCH] Clearing the API changes for the 1.3.0 release --- WhatsNew | 706 ------------------------------------------------------- 1 file changed, 706 deletions(-) diff --git a/WhatsNew b/WhatsNew index 64f669284..a54ab0abb 100644 --- a/WhatsNew +++ b/WhatsNew @@ -1,709 +1,3 @@ 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 , 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