supermario/base/SuperMarioProj.1994-02-09/Toolbox/DisplayMgr/DisplayMgrCompatibility.c
2019-06-29 23:17:50 +08:00

184 lines
5.3 KiB
C

/*
File: DisplayMgrCompatibility.c
Contains: Compatibility fixes for display manager.
To add a new fix, add a true/false (NOT a defined/undefined) flag
to DisplaysPriv.h. Try to make the fixes independent and clean.
There should be some way to detect that a fix is no longer necessary.
For example: if CloseView is upgraded to work with Display Manager, all
he has to do is set bit 1 or his gestalt selector and my patch will no
longer fire.
Written by: Ian Hendry
Copyright: © 1993 by Apple Computer, Inc., all rights reserved.
Change History (most recent first):
<2> 8/16/93 IH #1099391 <KON>: Sync w/Reality. Add fix for applications that
incorrectly set the "modeDisplayManagerAware" bit in the size
resource.
<1> 8/4/93 IH first checked in
<0> 8/4/93 IH First checked in. Fix 1102280.
*/
#ifndef __GESTALTEQU__
#include <GestaltEqu.h>
#endif
#ifndef __NOTIFICATION__
#include <Notification.h>
#endif
#ifndef __QDOFFSCREEN__
#include <QDOffscreen.h>
#endif
#ifndef __DISPLAYSPRIV__
#include "DisplaysPriv.h"
#endif
#ifndef FixCloseView
must define fix flags
#endif
#ifndef FixFalseDMAwareBits
must define fix flags
#endif
#if FixCloseView
struct CloseViewGlobalsRec {
// See Header.p in closeview sources fir more details
short rLineBytes; // (0) See Header.p in closeview sources
char mystery1[118]; // (2) Filler
Ptr rScreen; // (120) Base address of actual screen
char mystery2[4]; // (124) Filler
unsigned long screenSize; // (128) Size of the buffer allocated for screen
unsigned short sX; // (132) Size of the buffer allocated for screen
unsigned short sY; // (134) Size of the buffer allocated for screen
char mystery3[6]; // (136) Filler
short maxPixels; // (142) Max Depth of main screen
char mystery4[54]; // (144) Filler
short rPixels; // (198) Max Depth of main screen
char mystery5[12]; // (200) Filler
Boolean wantChangeScreen; // (212) Flag to turn closeview back on
char mystery6[3]; // (213) Filler
NMRec tooDeepNotification; // (216) Max Depth of main screen
};
typedef struct CloseViewGlobalsRec CloseViewGlobalsRec;
typedef CloseViewGlobalsRec *CloseViewGlobalsPtr;
#endif
OSErr DisplayManagerCloseViewCompatibility(GDHandle theGDevice,Rect* newDeviceRect,short newDepth)
// Called just before setting the main display
{
OSErr compatibilityErr = noErr;
long response;
#if FixCloseView
if( noErr == compatibilityErr )
{
if( (GetMainDevice() == theGDevice) &&
(noErr == Gestalt(gestaltCloseViewAttr,&response)) &&
(0 == (response & (1<<gestaltCloseViewDisplayMgrFriendly))) )
{
EventRecord bogusEvent;
CloseViewGlobalsPtr closeViewGlobals;
unsigned short screenY;
unsigned short screenX;
unsigned long screenLineBytes;
unsigned long newMaxDepth;
bogusEvent.message = 'BSDa';
GetOSEvent(0,&bogusEvent);
if( 'here' == bogusEvent.message ) // Check for signature
{
closeViewGlobals = *(CloseViewGlobalsPtr *)&bogusEvent.where; // global pointer returns in where field
// Danger: what about ResIndQD and large rowbytes?
// this will probably be evil... we need to be able to use long rowbytes
screenX = newDeviceRect->right - newDeviceRect->left;
screenY = newDeviceRect->bottom - newDeviceRect->top;
screenLineBytes = ((((screenX+15) / 8) >> 1) << 1);
newMaxDepth = closeViewGlobals->screenSize / (((unsigned long )screenY) * screenLineBytes);
closeViewGlobals->maxPixels = 0; // Make sure closeview turns off
InitGDevice((*theGDevice)->gdRefNum,-1,theGDevice);
// Could I get close view to turn back on if it
// was on when I started?
// Right now, closeview turns off when I execute this code
if( newDepth <= newMaxDepth )
NMRemove(&closeViewGlobals->tooDeepNotification);
if( 0 != (response & (1<<gestaltCloseViewEnabled)) )
closeViewGlobals->wantChangeScreen = true;
closeViewGlobals->maxPixels = newMaxDepth; // Allow closeview to turn back on (if possible) on the next initgdevice
closeViewGlobals->sX = screenX;
closeViewGlobals->sY = screenY;
}
else
compatibilityErr = -666;
}
}
#endif
return(compatibilityErr);
}
OSErr DisplayManagerAwareBitCompatibility(ProcessInfoRec *processInfo)
{
OSErr awareBitError = noErr;
FSSpec processSpec;
CInfoPBRec processCatInfo;
#if FixFalseDMAwareBits
#define kEarliestDisplayMgrDate 0xA8894400
processSpec = *processInfo->processAppSpec;
processCatInfo.hFileInfo.ioVRefNum = processSpec.vRefNum;
processCatInfo.hFileInfo.ioDirID = processSpec.parID;
processCatInfo.hFileInfo.ioNamePtr = &processSpec.name;
processCatInfo.hFileInfo.ioFVersNum = 0; // MFS compatibility (although I don't know why)
processCatInfo.hFileInfo.ioFDirIndex = 0; // By name
// Since almost all applications work, assume if we cannot get the catalog info, that all is okay
if( noErr == PBGetCatInfo(&processCatInfo,false) )
{
if( kEarliestDisplayMgrDate > processCatInfo.hFileInfo.ioFlCrDat )
{
#if DEBUG_DISPLAY_CODE
DebugStr("\p Application created to early to be display manager aware." );
#endif
awareBitError = -666;
}
}
else
{
#if DEBUG_DISPLAY_CODE
DebugStr("\p Could not get create date on app with DM aware true.");
#endif
}
#endif
return(awareBitError);
}