From e7dae0e6bf48eaa57d81745a7ff6bdd642c4c7e9 Mon Sep 17 00:00:00 2001
From: Josh Juran <jjuran@metamage.com>
Date: Thu, 3 Mar 2016 19:46:52 -0500
Subject: [PATCH] ams-qd:  Add EqualRgn trap handler

---
 v68k/modules/ams-qd/Regions.cc | 20 ++++++++++++++++++++
 v68k/modules/ams-qd/Regions.hh |  2 ++
 v68k/modules/ams-qd/ams-qd.cc  |  1 +
 3 files changed, 23 insertions(+)

diff --git a/v68k/modules/ams-qd/Regions.cc b/v68k/modules/ams-qd/Regions.cc
index 1211f3d201..b645539076 100644
--- a/v68k/modules/ams-qd/Regions.cc
+++ b/v68k/modules/ams-qd/Regions.cc
@@ -226,6 +226,26 @@ pascal unsigned char RectInRgn_patch( const Rect* r, MacRegion** rgn )
 	return SectRect_patch( r, &rgn[0]->rgnBBox, &intersection );
 }
 
+pascal unsigned char EqualRgn_patch( MacRegion** a, MacRegion** b )
+{
+	if ( a == b )
+	{
+		return true;
+	}
+	
+	if ( a[0]->rgnSize != b[0]->rgnSize )
+	{
+		return false;
+	}
+	
+	if ( EmptyRgn_patch( a )  &&  EmptyRgn_patch( b ) )
+	{
+		return true;
+	}
+	
+	return fast_memcmp( *a, *b, a[0]->rgnSize ) == 0;
+}
+
 pascal unsigned char EmptyRgn_patch( MacRegion** rgn )
 {
 	/*
diff --git a/v68k/modules/ams-qd/Regions.hh b/v68k/modules/ams-qd/Regions.hh
index 533cda11cc..001a969298 100644
--- a/v68k/modules/ams-qd/Regions.hh
+++ b/v68k/modules/ams-qd/Regions.hh
@@ -41,6 +41,8 @@ pascal void RectRgn_patch( MacRegion** rgn, const Rect* r );
 
 pascal unsigned char RectInRgn_patch( const Rect* r, MacRegion** rgn );
 
+pascal unsigned char EqualRgn_patch( MacRegion** a, MacRegion** b );
+
 pascal unsigned char EmptyRgn_patch( MacRegion** rgn );
 
 #endif
diff --git a/v68k/modules/ams-qd/ams-qd.cc b/v68k/modules/ams-qd/ams-qd.cc
index 995e95e5a6..35d69281f7 100644
--- a/v68k/modules/ams-qd/ams-qd.cc
+++ b/v68k/modules/ams-qd/ams-qd.cc
@@ -222,6 +222,7 @@ static void install_QuickDraw()
 	TBTRAP( OffsetRgn   );  // A8E0
 	TBTRAP( InsetRgn    );  // A8E1
 	TBTRAP( EmptyRgn    );  // A8E2
+	TBTRAP( EqualRgn    );  // A8E3
 	TBTRAP( SectRgn     );  // A8E4
 	TBTRAP( UnionRgn    );  // A8E5
 	TBTRAP( DiffRgn     );  // A8E6