Mercurial > sdl-ios-xcode
view src/cdrom/macos/SDL_syscdrom.c @ 1212:7663bb0f52c7
To: sdl@libsdl.org
From: Christian Walther <cwalther@gmx.ch>
Date: Thu, 15 Dec 2005 21:19:53 +0100
Subject: [SDL] More mouse enhancements for Mac OS X
The attached patch brings two more enhancements to mouse handling on Mac
OS X (Quartz):
1. Currently, after launching an SDL application, SDL's notion of the
mouse position is stuck in the top left corner (0,0) until the first
time the mouse is moved. That's because the UpdateMouse() function isn't
implemented in the Quartz driver. This patch adds it.
2. When grabbing input while the mouse cursor is hidden, the function
CGAssociateMouseAndMouseCursorPosition(0) is called, which prevents the
system's notion of the mouse location from moving (and therefore leaving
the SDL window) even when the mouse is moved. However, apparently the
Wacom tablet driver (and maybe other special pointing device drivers)
doesn't care about that setting and still allows the mouse location to
go outside of the window. Interestingly, the system cursor, which is
made visible by the existing code in SDL in that case, does not follow
the mouse location, but appears in the middle of the SDL window. The
mouse location being outside of the window however means that mouse
button events go to background applications (or the dock or whatever is
there), which is very confusing to the user who sees no cursor outside
of the SDL window.
I have not found any way of intercepting these events (and that's
probably by design, as "normal" applications shouldn't prevent the user
from bringing other applications' windows to the front by clicking on
them). An idea would be placing a fully transparent, screen-filling
window in front of everything, but I fear that this might affect
rendering performance (by doing unnecessary compositing, using up
memory, or whatever).
The deluxe solution to the problem would be talking to the tablet
driver using AppleEvents to tell it to constrain its mapped area to the
window (see Wacom's "TabletEventDemo" sample app,
http://www.wacomeng.com/devsupport/mac/downloads.html), but I think that
the bloat that solution would add to SDL would outweigh its usefulness.
What I did instead in my patch is reassociating mouse and cursor when
the mouse leaves the window while an invisible grab is in effect, and
restoring the grab when the window is entered. That way, the grab can
still be effectively broken by a tablet, but at least it's obvious to
the user that it is broken. That change is minimal - it doesn't affect
operation with a mouse (or a trackpad), and the code that it adds is not
executed on every PumpEvents() call, only when entering and leaving the
window.
Unless there are any concerns about the patch, please apply. Feel free
to shorten the lengthy comment in SDL_QuartzEvents.m if you think it's
too verbose.
Thanks
-Christian
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Mon, 02 Jan 2006 00:31:00 +0000 |
parents | b8d311d90021 |
children | c9b51268668f |
line wrap: on
line source
/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2004 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 /* MacOS functions for system-level CD-ROM audio control */ #include <Devices.h> #include <Files.h> #include <LowMem.h> /* Use entry table macros, not functions in InterfaceLib */ #include "SDL_cdrom.h" #include "SDL_syscdrom.h" #include "SDL_syscdrom_c.h" /* Added by Matt Slot */ #if !defined(LMGetUnitTableEntryCount) #define LMGetUnitTableEntryCount() *(short *)0x01D2 #endif /* The maximum number of CD-ROM drives we'll detect */ #define MAX_DRIVES 26 /* A list of available CD-ROM drives */ static long SDL_cdversion = 0; static struct { short dRefNum; short driveNum; long frames; char name[256]; Boolean hasAudio; } SDL_cdlist[MAX_DRIVES]; static StringPtr gDriverName = "\p.AppleCD"; /* The system-dependent CD control functions */ static const char *SDL_SYS_CDName(int drive); static int SDL_SYS_CDOpen(int drive); static int SDL_SYS_CDGetTOC(SDL_CD *cdrom); static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position); static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length); static int SDL_SYS_CDPause(SDL_CD *cdrom); static int SDL_SYS_CDResume(SDL_CD *cdrom); static int SDL_SYS_CDStop(SDL_CD *cdrom); static int SDL_SYS_CDEject(SDL_CD *cdrom); static void SDL_SYS_CDClose(SDL_CD *cdrom); static short SDL_SYS_ShortToBCD(short value) { return((value % 10) + (value / 10) * 0x10); /* Convert value to BCD */ } static short SDL_SYS_BCDToShort(short value) { return((value % 0x10) + (value / 0x10) * 10); /* Convert value from BCD */ } int SDL_SYS_CDInit(void) { SInt16 dRefNum = 0; SInt16 first, last; SDL_numcds = 0; /* Check that the software is available */ if (Gestalt(kGestaltAudioCDSelector, &SDL_cdversion) || !SDL_cdversion) return(0); /* Fill in our driver capabilities */ SDL_CDcaps.Name = SDL_SYS_CDName; SDL_CDcaps.Open = SDL_SYS_CDOpen; SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; SDL_CDcaps.Status = SDL_SYS_CDStatus; SDL_CDcaps.Play = SDL_SYS_CDPlay; SDL_CDcaps.Pause = SDL_SYS_CDPause; SDL_CDcaps.Resume = SDL_SYS_CDResume; SDL_CDcaps.Stop = SDL_SYS_CDStop; SDL_CDcaps.Eject = SDL_SYS_CDEject; SDL_CDcaps.Close = SDL_SYS_CDClose; /* Walk the list, count each AudioCD driver, and save the refnums */ first = -1; last = 0 - LMGetUnitTableEntryCount(); for(dRefNum = first; dRefNum >= last; dRefNum--) { Str255 driverName; StringPtr namePtr; DCtlHandle deviceEntry; deviceEntry = GetDCtlEntry(dRefNum); if (! deviceEntry) continue; /* Is this an .AppleCD ? */ namePtr = (*deviceEntry)->dCtlFlags & (1L << dRAMBased) ? ((StringPtr) ((DCtlPtr) deviceEntry)->dCtlDriver + 18) : ((StringPtr) (*deviceEntry)->dCtlDriver + 18); BlockMoveData(namePtr, driverName, namePtr[0]+1); if (driverName[0] > gDriverName[0]) driverName[0] = gDriverName[0]; if (! EqualString(driverName, gDriverName, false, false)) continue; /* Record the basic info for each drive */ SDL_cdlist[SDL_numcds].dRefNum = dRefNum; BlockMoveData(namePtr + 1, SDL_cdlist[SDL_numcds].name, namePtr[0]); SDL_cdlist[SDL_numcds].name[namePtr[0]] = 0; SDL_cdlist[SDL_numcds].hasAudio = false; SDL_numcds++; } return(0); } static const char *SDL_SYS_CDName(int drive) { return(SDL_cdlist[drive].name); } static int get_drivenum(int drive) { QHdr *driveQ = GetDrvQHdr(); DrvQEl *driveElem; /* Update the drive number */ SDL_cdlist[drive].driveNum = 0; if ( driveQ->qTail ) { driveQ->qTail->qLink = 0; } for ( driveElem=(DrvQEl *)driveQ->qHead; driveElem; driveElem = (DrvQEl *)driveElem->qLink ) { if ( driveElem->dQRefNum == SDL_cdlist[drive].dRefNum ) { SDL_cdlist[drive].driveNum = driveElem->dQDrive; break; } } return(SDL_cdlist[drive].driveNum); } static int SDL_SYS_CDOpen(int drive) { return(drive); } static int SDL_SYS_CDGetTOC(SDL_CD *cdrom) { CDCntrlParam cdpb; CDTrackData tracks[SDL_MAX_TRACKS]; long i, leadout; /* Get the number of tracks on the CD by examining the TOC */ memset(&cdpb, 0, sizeof(cdpb)); cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum; cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum; cdpb.csCode = kReadTOC; cdpb.csParam.words[0] = kGetTrackRange; if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) { SDL_SetError("PBControlSync() failed"); return(-1); } cdrom->numtracks = SDL_SYS_BCDToShort(cdpb.csParam.bytes[1]) - SDL_SYS_BCDToShort(cdpb.csParam.bytes[0]) + 1; if ( cdrom->numtracks > SDL_MAX_TRACKS ) cdrom->numtracks = SDL_MAX_TRACKS; cdrom->status = CD_STOPPED; cdrom->cur_track = 0; /* Apparently these are set elsewhere */ cdrom->cur_frame = 0; /* Apparently these are set elsewhere */ /* Get the lead out area of the CD by examining the TOC */ memset(&cdpb, 0, sizeof(cdpb)); cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum; cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum; cdpb.csCode = kReadTOC; cdpb.csParam.words[0] = kGetLeadOutArea; if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) { SDL_SetError("PBControlSync() failed"); return(-1); } leadout = MSF_TO_FRAMES( SDL_SYS_BCDToShort(cdpb.csParam.bytes[0]), SDL_SYS_BCDToShort(cdpb.csParam.bytes[1]), SDL_SYS_BCDToShort(cdpb.csParam.bytes[2])); /* Get an array of track locations by examining the TOC */ memset(tracks, 0, sizeof(tracks)); memset(&cdpb, 0, sizeof(cdpb)); cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum; cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum; cdpb.csCode = kReadTOC; cdpb.csParam.words[0] = kGetTrackEntries; /* Type of Query */ * ((long *) (cdpb.csParam.words+1)) = (long) tracks; cdpb.csParam.words[3] = cdrom->numtracks * sizeof(tracks[0]); * ((char *) (cdpb.csParam.words+4)) = 1; /* First track */ if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) { SDL_SetError("PBControlSync() failed"); return(-1); } /* Read all the track TOC entries */ SDL_cdlist[cdrom->id].hasAudio = false; for ( i=0; i<cdrom->numtracks; ++i ) { cdrom->track[i].id = i+1; if (tracks[i].entry.control & kDataTrackMask) cdrom->track[i].type = SDL_DATA_TRACK; else { cdrom->track[i].type = SDL_AUDIO_TRACK; SDL_cdlist[SDL_numcds].hasAudio = true; } cdrom->track[i].offset = MSF_TO_FRAMES( SDL_SYS_BCDToShort(tracks[i].entry.min), SDL_SYS_BCDToShort(tracks[i].entry.min), SDL_SYS_BCDToShort(tracks[i].entry.frame)); cdrom->track[i].length = MSF_TO_FRAMES( SDL_SYS_BCDToShort(tracks[i+1].entry.min), SDL_SYS_BCDToShort(tracks[i+1].entry.min), SDL_SYS_BCDToShort(tracks[i+1].entry.frame)) - cdrom->track[i].offset; } /* Apparently SDL wants a fake last entry */ cdrom->track[i].offset = leadout; cdrom->track[i].length = 0; return(0); } /* Get CD-ROM status */ static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position) { CDCntrlParam cdpb; CDstatus status = CD_ERROR; Boolean spinning = false; if (position) *position = 0; /* Get the number of tracks on the CD by examining the TOC */ if ( ! get_drivenum(cdrom->id) ) { return(CD_TRAYEMPTY); } memset(&cdpb, 0, sizeof(cdpb)); cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum; cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum; cdpb.csCode = kReadTOC; cdpb.csParam.words[0] = kGetTrackRange; if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) { SDL_SetError("PBControlSync() failed"); return(CD_ERROR); } cdrom->numtracks = SDL_SYS_BCDToShort(cdpb.csParam.bytes[1]) - SDL_SYS_BCDToShort(cdpb.csParam.bytes[0]) + 1; if ( cdrom->numtracks > SDL_MAX_TRACKS ) cdrom->numtracks = SDL_MAX_TRACKS; cdrom->cur_track = 0; /* Apparently these are set elsewhere */ cdrom->cur_frame = 0; /* Apparently these are set elsewhere */ if (1 || SDL_cdlist[cdrom->id].hasAudio) { /* Get the current playback status */ memset(&cdpb, 0, sizeof(cdpb)); cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum; cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum; cdpb.csCode = kAudioStatus; if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) { SDL_SetError("PBControlSync() failed"); return(-1); } switch(cdpb.csParam.cd.status) { case kStatusPlaying: status = CD_PLAYING; spinning = true; break; case kStatusPaused: status = CD_PAUSED; spinning = true; break; case kStatusMuted: status = CD_PLAYING; /* What should I do here? */ spinning = true; break; case kStatusDone: status = CD_STOPPED; spinning = true; break; case kStatusStopped: status = CD_STOPPED; spinning = false; break; case kStatusError: default: status = CD_ERROR; spinning = false; break; } if (spinning && position) *position = MSF_TO_FRAMES( SDL_SYS_BCDToShort(cdpb.csParam.cd.minute), SDL_SYS_BCDToShort(cdpb.csParam.cd.second), SDL_SYS_BCDToShort(cdpb.csParam.cd.frame)); } else status = CD_ERROR; /* What should I do here? */ return(status); } /* Start play */ static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) { CDCntrlParam cdpb; /* Pause the current audio playback to avoid audible artifacts */ if ( SDL_SYS_CDPause(cdrom) < 0 ) { return(-1); } /* Specify the AudioCD playback mode */ memset(&cdpb, 0, sizeof(cdpb)); cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum; cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum; cdpb.csCode = kSetPlayMode; cdpb.csParam.bytes[0] = false; /* Repeat? */ cdpb.csParam.bytes[1] = kPlayModeSequential; /* Play mode */ /* ¥¥¥ÊTreat as soft error, NEC Drive doesnt support this call ¥¥¥ */ PBControlSync((ParmBlkPtr) &cdpb); #if 1 /* Specify the end of audio playback */ memset(&cdpb, 0, sizeof(cdpb)); cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum; cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum; cdpb.csCode = kAudioStop; cdpb.csParam.words[0] = kBlockPosition; /* Position Mode */ *(long *) (cdpb.csParam.words + 1) = start+length-1; /* Search Address */ if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) { SDL_SetError("PBControlSync() failed"); return(-1); } /* Specify the start of audio playback, and start it */ memset(&cdpb, 0, sizeof(cdpb)); cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum; cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum; cdpb.csCode = kAudioPlay; cdpb.csParam.words[0] = kBlockPosition; /* Position Mode */ *(long *) (cdpb.csParam.words + 1) = start+1; /* Search Address */ cdpb.csParam.words[3] = false; /* Stop address? */ cdpb.csParam.words[4] = kStereoPlayMode; /* Audio Play Mode */ if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) { SDL_SetError("PBControlSync() failed"); return(-1); } #else /* Specify the end of audio playback */ FRAMES_TO_MSF(start+length, &m, &s, &f); memset(&cdpb, 0, sizeof(cdpb)); cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum; cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum; cdpb.csCode = kAudioStop; cdpb.csParam.words[0] = kTrackPosition; /* Position Mode */ cdpb.csParam.words[1] = 0; /* Search Address (hiword)*/ cdpb.csParam.words[2] = /* Search Address (loword)*/ SDL_SYS_ShortToBCD(cdrom->numtracks); if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) { SDL_SetError("PBControlSync() failed"); return(-1); } /* Specify the start of audio playback, and start it */ FRAMES_TO_MSF(start, &m, &s, &f); memset(&cdpb, 0, sizeof(cdpb)); cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum; cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum; cdpb.csCode = kAudioPlay; cdpb.csParam.words[0] = kTrackPosition; /* Position Mode */ cdpb.csParam.words[1] = 0; /* Search Address (hiword)*/ cdpb.csParam.words[2] = SDL_SYS_ShortToBCD(1); /* Search Address (loword)*/ cdpb.csParam.words[3] = false; /* Stop address? */ cdpb.csParam.words[4] = kStereoPlayMode; /* Audio Play Mode */ if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) { SDL_SetError("PBControlSync() failed"); return(-1); } #endif return(0); } /* Pause play */ static int SDL_SYS_CDPause(SDL_CD *cdrom) { CDCntrlParam cdpb; memset(&cdpb, 0, sizeof(cdpb)); cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum; cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum; cdpb.csCode = kAudioPause; cdpb.csParam.words[0] = 0; /* Pause/Continue Flag (hiword) */ cdpb.csParam.words[1] = 1; /* Pause/Continue Flag (loword) */ if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) { SDL_SetError("PBControlSync() failed"); return(-1); } return(0); } /* Resume play */ static int SDL_SYS_CDResume(SDL_CD *cdrom) { CDCntrlParam cdpb; memset(&cdpb, 0, sizeof(cdpb)); cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum; cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum; cdpb.csCode = kAudioPause; cdpb.csParam.words[0] = 0; /* Pause/Continue Flag (hiword) */ cdpb.csParam.words[1] = 0; /* Pause/Continue Flag (loword) */ if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) { SDL_SetError("PBControlSync() failed"); return(-1); } return(0); } /* Stop play */ static int SDL_SYS_CDStop(SDL_CD *cdrom) { CDCntrlParam cdpb; memset(&cdpb, 0, sizeof(cdpb)); cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum; cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum; cdpb.csCode = kAudioStop; cdpb.csParam.words[0] = 0; /* Position Mode */ cdpb.csParam.words[1] = 0; /* Search Address (hiword) */ cdpb.csParam.words[2] = 0; /* Search Address (loword) */ if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) { SDL_SetError("PBControlSync() failed"); return(-1); } return(0); } /* Eject the CD-ROM */ static int SDL_SYS_CDEject(SDL_CD *cdrom) { Boolean disk = false; QHdr *driveQ = GetDrvQHdr(); DrvQEl *driveElem; HParamBlockRec hpb; ParamBlockRec cpb; for ( driveElem = (DrvQEl *) driveQ->qHead; driveElem; driveElem = (driveElem) ? ((DrvQEl *) driveElem->qLink) : ((DrvQEl *) driveQ->qHead) ) { if ( driveQ->qTail ) { driveQ->qTail->qLink = 0; } if ( driveElem->dQRefNum != SDL_cdlist[cdrom->id].dRefNum ) { continue; } /* Does drive contain mounted volume? If not, skip */ memset(&hpb, 0, sizeof(hpb)); hpb.volumeParam.ioVRefNum = driveElem->dQDrive; if ( PBHGetVInfoSync(&hpb) != noErr ) { continue; } if ( (UnmountVol(0, driveElem->dQDrive) == noErr) && (Eject(0, driveElem->dQDrive) == noErr) ) { driveElem = 0; /* Clear pointer to reset our loop */ disk = true; } } /* If no disk is present, just eject the tray */ if (! disk) { memset(&cpb, 0, sizeof(cpb)); cpb.cntrlParam.ioVRefNum = 0; /* No Drive */ cpb.cntrlParam.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum; cpb.cntrlParam.csCode = kEjectTheDisc; if ( PBControlSync((ParmBlkPtr)&cpb) != noErr ) { SDL_SetError("PBControlSync() failed"); return(-1); } } return(0); } /* Close the CD-ROM handle */ static void SDL_SYS_CDClose(SDL_CD *cdrom) { return; } void SDL_SYS_CDQuit(void) { while(SDL_numcds--) memset(SDL_cdlist + SDL_numcds, 0, sizeof(SDL_cdlist[0])); }