Mercurial > sdl-ios-xcode
view src/events/SDL_events.c @ 663:8bedd6d61642
Date: Sat, 2 Aug 2003 16:22:51 +0300
From: "Mike Gorchak"
Subject: New patches for QNX6
Here my patches for the SDL/QNX:
QNXSDL.diff - diff to non-QNX related sources:
- updated BUGS file, I think QNX6 is now will be officially supported
- configure.in - added shared library support for QNX, and removed dependency between the ALSA and QNX6.
- SDL_audio.c - added QNX NTO sound bootstrap insted of ALSA's.
- SDL_sysaudio.h - the same.
- SDL_nto_audio.c - the same.
- SDL_video.c - right now, QNX doesn't offer any method to obtain pointers to the OpenGL functions by function name, so they must be hardcoded in library, otherwise OpenGL will not be supported.
- testsprite.c - fixed: do not draw vertical red line if we are in non-double-buffered mode.
sdlqnxph.tar.gz - archive of the ./src/video/photon/* . Too many changes in code to make diffs :) :
+ Added stub for support hide/unhide window event
+ Added full YUV overlays support.
+ Added window maximize support.
+ Added mouse wheel events.
+ Added support for some specific key codes in Unicode mode (like ESC).
+ Added more checks to the all memory allocation code.
+ Added SDL_DOUBLEBUF support in all fullscreen modes.
+ Added fallback to window mode, if desired fullscreen mode is not supported.
+ Added stub support for the GL_LoadLibrary and GL_GetProcAddress functions.
+ Added resizable window support without caption.
! Fixed bug in the Ph_EV_EXPOSE event handler, when rectangles to update is 0 and when width or height of the rectangle is 0.
! Fixed bug in the event handler code. Events has not been passed to the window widget handler.
! Fixed codes for Win keys (Super/Hyper/Menu).
! Fixed memory leak, when deallocation palette.
! Fixed palette emulation code bugs.
! Fixed fullscreen and hwsurface handling.
! Fixed CLOSE button bug. First event was passed to the handler, but second terminated the application. Now all events passed to the application correctly.
- Removed all printfs in code, now SDL_SetError used instead of them.
- Disabled ToggleFullScreen function.
README.QNX - updated README.QNX file. Added much more issues.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Mon, 04 Aug 2003 00:52:42 +0000 |
parents | 1870bb49ab18 |
children | b8d311d90021 |
line wrap: on
line source
/* SDL - Simple DirectMedia Layer Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org */ #ifdef SAVE_RCSID static char rcsid = "@(#) $Id$"; #endif /* General event handling code for SDL */ #include <stdio.h> #include <string.h> #include "SDL.h" #include "SDL_thread.h" #include "SDL_mutex.h" #include "SDL_events.h" #include "SDL_events_c.h" #include "SDL_timer_c.h" #ifndef DISABLE_JOYSTICK #include "SDL_joystick_c.h" #endif #ifndef ENABLE_X11 #define DISABLE_X11 #endif #include "SDL_syswm.h" #include "SDL_sysevents.h" /* Public data -- the event filter */ SDL_EventFilter SDL_EventOK = NULL; Uint8 SDL_ProcessEvents[SDL_NUMEVENTS]; static Uint32 SDL_eventstate = 0; /* Private data -- event queue */ #define MAXEVENTS 128 static struct { SDL_mutex *lock; int active; int head; int tail; SDL_Event event[MAXEVENTS]; int wmmsg_next; struct SDL_SysWMmsg wmmsg[MAXEVENTS]; } SDL_EventQ; /* Private data -- event locking structure */ static struct { SDL_mutex *lock; int safe; } SDL_EventLock; /* Thread functions */ static SDL_Thread *SDL_EventThread = NULL; /* Thread handle */ static Uint32 event_thread; /* The event thread id */ void SDL_Lock_EventThread(void) { if ( SDL_EventThread && (SDL_ThreadID() != event_thread) ) { /* Grab lock and spin until we're sure event thread stopped */ SDL_mutexP(SDL_EventLock.lock); while ( ! SDL_EventLock.safe ) { SDL_Delay(1); } } } void SDL_Unlock_EventThread(void) { if ( SDL_EventThread && (SDL_ThreadID() != event_thread) ) { SDL_mutexV(SDL_EventLock.lock); } } static int SDL_GobbleEvents(void *unused) { SDL_SetTimerThreaded(2); event_thread = SDL_ThreadID(); while ( SDL_EventQ.active ) { SDL_VideoDevice *video = current_video; SDL_VideoDevice *this = current_video; /* Get events from the video subsystem */ if ( video ) { video->PumpEvents(this); } /* Queue pending key-repeat events */ SDL_CheckKeyRepeat(); #ifndef DISABLE_JOYSTICK /* Check for joystick state change */ if ( SDL_numjoysticks && (SDL_eventstate & SDL_JOYEVENTMASK) ) { SDL_JoystickUpdate(); } #endif /* Give up the CPU for the rest of our timeslice */ SDL_EventLock.safe = 1; if( SDL_timer_running ) { SDL_ThreadedTimerCheck(); } SDL_Delay(1); /* Check for event locking. On the P of the lock mutex, if the lock is held, this thread will wait until the lock is released before continuing. The safe flag will be set, meaning that the other thread can go about it's business. The safe flag is reset before the V, so as soon as the mutex is free, other threads can see that it's not safe to interfere with the event thread. */ SDL_mutexP(SDL_EventLock.lock); SDL_EventLock.safe = 0; SDL_mutexV(SDL_EventLock.lock); } SDL_SetTimerThreaded(0); event_thread = 0; return(0); } static int SDL_StartEventThread(Uint32 flags) { /* Reset everything to zero */ SDL_EventThread = NULL; memset(&SDL_EventLock, 0, sizeof(SDL_EventLock)); /* Create the lock and set ourselves active */ #ifndef DISABLE_THREADS SDL_EventQ.lock = SDL_CreateMutex(); if ( SDL_EventQ.lock == NULL ) { #ifdef macintosh /* On MacOS 7/8, you can't multithread, so no lock needed */ ; #else return(-1); #endif } #endif /* !DISABLE_THREADS */ SDL_EventQ.active = 1; if ( (flags&SDL_INIT_EVENTTHREAD) == SDL_INIT_EVENTTHREAD ) { SDL_EventLock.lock = SDL_CreateMutex(); if ( SDL_EventLock.lock == NULL ) { return(-1); } SDL_EventLock.safe = 0; SDL_EventThread = SDL_CreateThread(SDL_GobbleEvents, NULL); if ( SDL_EventThread == NULL ) { return(-1); } } else { event_thread = 0; } return(0); } static void SDL_StopEventThread(void) { SDL_EventQ.active = 0; if ( SDL_EventThread ) { SDL_WaitThread(SDL_EventThread, NULL); SDL_EventThread = NULL; SDL_DestroyMutex(SDL_EventLock.lock); } SDL_DestroyMutex(SDL_EventQ.lock); } Uint32 SDL_EventThreadID(void) { return(event_thread); } /* Public functions */ void SDL_StopEventLoop(void) { /* Halt the event thread, if running */ SDL_StopEventThread(); /* Clean out EventQ */ SDL_EventQ.head = 0; SDL_EventQ.tail = 0; SDL_EventQ.wmmsg_next = 0; } /* This function (and associated calls) may be called more than once */ int SDL_StartEventLoop(Uint32 flags) { int retcode; /* Clean out the event queue */ SDL_EventThread = NULL; SDL_EventQ.lock = NULL; SDL_StopEventLoop(); /* No filter to start with, process most event types */ SDL_EventOK = NULL; memset(SDL_ProcessEvents,SDL_ENABLE,sizeof(SDL_ProcessEvents)); SDL_eventstate = ~0; /* It's not save to call SDL_EventState() yet */ SDL_eventstate &= ~(0x00000001 << SDL_SYSWMEVENT); SDL_ProcessEvents[SDL_SYSWMEVENT] = SDL_IGNORE; /* Initialize event handlers */ retcode = 0; retcode += SDL_AppActiveInit(); retcode += SDL_KeyboardInit(); retcode += SDL_MouseInit(); retcode += SDL_QuitInit(); if ( retcode < 0 ) { /* We don't expect them to fail, but... */ return(-1); } /* Create the lock and event thread */ if ( SDL_StartEventThread(flags) < 0 ) { SDL_StopEventLoop(); return(-1); } return(0); } /* Add an event to the event queue -- called with the queue locked */ static int SDL_AddEvent(SDL_Event *event) { int tail, added; tail = (SDL_EventQ.tail+1)%MAXEVENTS; if ( tail == SDL_EventQ.head ) { /* Overflow, drop event */ added = 0; } else { SDL_EventQ.event[SDL_EventQ.tail] = *event; if (event->type == SDL_SYSWMEVENT) { /* Note that it's possible to lose an event */ int next = SDL_EventQ.wmmsg_next; SDL_EventQ.wmmsg[next] = *event->syswm.msg; SDL_EventQ.event[SDL_EventQ.tail].syswm.msg = &SDL_EventQ.wmmsg[next]; SDL_EventQ.wmmsg_next = (next+1)%MAXEVENTS; } SDL_EventQ.tail = tail; added = 1; } return(added); } /* Cut an event, and return the next valid spot, or the tail */ /* -- called with the queue locked */ static int SDL_CutEvent(int spot) { if ( spot == SDL_EventQ.head ) { SDL_EventQ.head = (SDL_EventQ.head+1)%MAXEVENTS; return(SDL_EventQ.head); } else if ( (spot+1)%MAXEVENTS == SDL_EventQ.tail ) { SDL_EventQ.tail = spot; return(SDL_EventQ.tail); } else /* We cut the middle -- shift everything over */ { int here, next; /* This can probably be optimized with memcpy() -- careful! */ if ( --SDL_EventQ.tail < 0 ) { SDL_EventQ.tail = MAXEVENTS-1; } for ( here=spot; here != SDL_EventQ.tail; here = next ) { next = (here+1)%MAXEVENTS; SDL_EventQ.event[here] = SDL_EventQ.event[next]; } return(spot); } /* NOTREACHED */ } /* Lock the event queue, take a peep at it, and unlock it */ int SDL_PeepEvents(SDL_Event *events, int numevents, SDL_eventaction action, Uint32 mask) { int i, used; /* Don't look after we've quit */ if ( ! SDL_EventQ.active ) { return(-1); } /* Lock the event queue */ used = 0; if ( SDL_mutexP(SDL_EventQ.lock) == 0 ) { if ( action == SDL_ADDEVENT ) { for ( i=0; i<numevents; ++i ) { used += SDL_AddEvent(&events[i]); } } else { SDL_Event tmpevent; int spot; /* If 'events' is NULL, just see if they exist */ if ( events == NULL ) { action = SDL_PEEKEVENT; numevents = 1; events = &tmpevent; } spot = SDL_EventQ.head; while ((used < numevents)&&(spot != SDL_EventQ.tail)) { if ( mask & SDL_EVENTMASK(SDL_EventQ.event[spot].type) ) { events[used++] = SDL_EventQ.event[spot]; if ( action == SDL_GETEVENT ) { spot = SDL_CutEvent(spot); } else { spot = (spot+1)%MAXEVENTS; } } else { spot = (spot+1)%MAXEVENTS; } } } SDL_mutexV(SDL_EventQ.lock); } else { SDL_SetError("Couldn't lock event queue"); used = -1; } return(used); } /* Run the system dependent event loops */ void SDL_PumpEvents(void) { if ( !SDL_EventThread ) { SDL_VideoDevice *video = current_video; SDL_VideoDevice *this = current_video; /* Get events from the video subsystem */ if ( video ) { video->PumpEvents(this); } /* Queue pending key-repeat events */ SDL_CheckKeyRepeat(); #ifndef DISABLE_JOYSTICK /* Check for joystick state change */ if ( SDL_numjoysticks && (SDL_eventstate & SDL_JOYEVENTMASK) ) { SDL_JoystickUpdate(); } #endif } } /* Public functions */ int SDL_PollEvent (SDL_Event *event) { SDL_PumpEvents(); /* We can't return -1, just return 0 (no event) on error */ if ( SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_ALLEVENTS) <= 0 ) return 0; return 1; } int SDL_WaitEvent (SDL_Event *event) { while ( 1 ) { SDL_PumpEvents(); switch(SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_ALLEVENTS)) { case -1: return 0; case 1: return 1; case 0: SDL_Delay(10); } } } int SDL_PushEvent(SDL_Event *event) { if ( SDL_PeepEvents(event, 1, SDL_ADDEVENT, 0) <= 0 ) return -1; return 0; } void SDL_SetEventFilter (SDL_EventFilter filter) { SDL_Event bitbucket; /* Set filter and discard pending events */ SDL_EventOK = filter; while ( SDL_PollEvent(&bitbucket) > 0 ) ; } SDL_EventFilter SDL_GetEventFilter(void) { return(SDL_EventOK); } Uint8 SDL_EventState (Uint8 type, int state) { SDL_Event bitbucket; Uint8 current_state; /* If SDL_ALLEVENTS was specified... */ if ( type == 0xFF ) { current_state = SDL_IGNORE; for ( type=0; type<SDL_NUMEVENTS; ++type ) { if ( SDL_ProcessEvents[type] != SDL_IGNORE ) { current_state = SDL_ENABLE; } SDL_ProcessEvents[type] = state; if ( state == SDL_ENABLE ) { SDL_eventstate |= (0x00000001 << (type)); } else { SDL_eventstate &= ~(0x00000001 << (type)); } } while ( SDL_PollEvent(&bitbucket) > 0 ) ; return(current_state); } /* Just set the state for one event type */ current_state = SDL_ProcessEvents[type]; switch (state) { case SDL_IGNORE: case SDL_ENABLE: /* Set state and discard pending events */ SDL_ProcessEvents[type] = state; if ( state == SDL_ENABLE ) { SDL_eventstate |= (0x00000001 << (type)); } else { SDL_eventstate &= ~(0x00000001 << (type)); } while ( SDL_PollEvent(&bitbucket) > 0 ) ; break; default: /* Querying state? */ break; } return(current_state); } /* This is a generic event handler. */ int SDL_PrivateSysWMEvent(SDL_SysWMmsg *message) { int posted; posted = 0; if ( SDL_ProcessEvents[SDL_SYSWMEVENT] == SDL_ENABLE ) { SDL_Event event; memset(&event, 0, sizeof(event)); event.type = SDL_SYSWMEVENT; event.syswm.msg = message; if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) { posted = 1; SDL_PushEvent(&event); } } /* Update internal event state */ return(posted); }