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view src/cdrom/macos/SDL_syscdrom.c @ 563:04dcaf3da918

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Massive Quartz input enhancements from Darrell Walisser. His email: Enclosed is a patch that addresses the following: --Various minor cleanups. Removed dead/obsolete code, made some style cleanups --Mouse Events Now keep track of what button(s) were pressed so we know when to send the mouse up event. This fixes the case where the mouse is dragged outside of the game window and released (in which case we want to send the mouse up event even though the mouse is outside the game window). --Input Grabbing Here is my take on the grabbing situation, which is the basis for the new implementation. There are 3 grab states, ungrabbed (UG), visible (VG), and invisible (IG). Both VG and IG keep the mouse constrained to the window and produce relative motion events. In VG the cursor is visible (duh), in IG it is not. In VG, absolute motion events also work. There are 6 actions that can affect grabbing: 1. Set Fullscreen/Window (F/W). In fullscreen, a visible grab should do nothing. However, a fullscreen visible grab can be treated just like a windowed visible grab, which is what I have done to help simplify things. 2. Cursor hide/show (H/S). If the cursor is hidden when grabbing, the grab is an invisible grab. If the cursor is visible, the grab should just constrain the mouse to the window. 3. Input grab/ungrab(G/U). If grabbed, the cursor should be confined to the window as should the keyboard input. On Mac OS X, the keyboard input is implicitly grabbed by confining the cursor, except for command-tab which can switch away from the application. Should the window come to the foreground if the application is deactivated and grab input is called? This isn't necessary in this implementation because the grab state will be asserted upon activation. Using my notation, these are all the cases that need to be handled (state + action = new state). UG+U = UG UG+G = VG or IG, if cursor is visible or not UG+H = UG UG+S = UG VG+U = UG VG+G = VG VG+H = IG VG+S = VG IG+U = UG IG+G = IG IG+H = IG IG+S = VG The cases that result in the same state can be ignored in the code, which cuts it down to just 5 cases. Another issue is what happens when the app loses/gains input focus from deactivate/activate or iconify/deiconify. I think that if input focus is ever lost (outside of SDL's control), the grab state should be suspended and the cursor should become visible and active again. When regained, the cursor should reappear in its original location and/or grab state. This way, when reactivating the cursor is still in the same position as before so apps shouldn't get confused when the next motion event comes in. This is what I've done in this patch.
author Ryan C. Gordon <icculus@icculus.org>
date Fri, 27 Dec 2002 20:52:41 +0000
parents f6ffac90895c
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

/* 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]));
}