copied video_sdl.cpp from cebix/macemu
diff --git a/SheepShaver/src/SDL/video_sdl.cpp b/SheepShaver/src/SDL/video_sdl.cpp
old mode 100755
new mode 100644
index ce2c9ae..9782c74
--- a/SheepShaver/src/SDL/video_sdl.cpp
+++ b/SheepShaver/src/SDL/video_sdl.cpp
@@ -31,6 +31,7 @@
  *  - Ctr-Tab for suspend/resume but how? SDL does not support that for non-Linux
  *  - Ctrl-Fn doesn't generate SDL_KEYDOWN events (SDL bug?)
  *  - Mouse acceleration, there is no API in SDL yet for that
+ *  - Force relative mode in Grab mode even if SDL provides absolute coordinates?
  *  - Gamma tables support is likely to be broken here
  *  - Events processing is bound to the general emulation thread as SDL requires
  *    to PumpEvents() within the same thread as the one that called SetVideoMode().
@@ -135,6 +136,7 @@
 static const int sdl_eventmask = SDL_MOUSEEVENTMASK | SDL_KEYEVENTMASK | SDL_VIDEOEXPOSEMASK | SDL_QUITMASK | SDL_ACTIVEEVENTMASK;
 
 static bool mouse_grabbed = false;
+static bool mouse_grabbed_window_name_status = false;
 
 // Mutex to protect SDL events
 static SDL_mutex *sdl_events_lock = NULL;
@@ -494,7 +496,7 @@
 }
 
 // Set Mac frame layout and base address (uses the_buffer/MacFrameBaseMac)
-static void set_mac_frame_buffer(SDL_monitor_desc &monitor, int depth, bool native_byte_order)
+static void set_mac_frame_buffer(SDL_monitor_desc &monitor, int depth)
 {
 #if !REAL_ADDRESSING && !DIRECT_ADDRESSING
 	int layout = FLAYOUT_DIRECT;
@@ -502,10 +504,7 @@
 		layout = (screen_depth == 15) ? FLAYOUT_HOST_555 : FLAYOUT_HOST_565;
 	else if (depth == VIDEO_DEPTH_32BIT)
 		layout = (screen_depth == 24) ? FLAYOUT_HOST_888 : FLAYOUT_DIRECT;
-	if (native_byte_order)
-		MacFrameLayout = layout;
-	else
-		MacFrameLayout = FLAYOUT_DIRECT;
+	MacFrameLayout = layout;
 	monitor.set_mac_frame_base(MacFrameBaseMac);
 
 	// Set variables used by UAE memory banking
@@ -686,13 +685,13 @@
 	}
 
 	// Set frame buffer base
-	set_mac_frame_buffer(monitor, VIDEO_MODE_DEPTH, true);
+	set_mac_frame_buffer(monitor, VIDEO_MODE_DEPTH);
 
 	adapt_to_video_mode();
 }
 
 void driver_base::adapt_to_video_mode() {
-	ADBSetRelMouseMode(mouse_grabbed);
+	ADBSetRelMouseMode(false);
 
 	// Init blitting routines
 	SDL_PixelFormat *f = s->format;
@@ -726,7 +725,7 @@
 	SDL_ShowCursor(hardware_cursor);
 
 	// Set window name/class
-	set_window_name(mouse_grabbed ? STR_WINDOW_TITLE_GRABBED : STR_WINDOW_TITLE);
+	set_window_name(STR_WINDOW_TITLE);
 
 	// Everything went well
 	init_ok = true;
@@ -804,9 +803,8 @@
 	if (!mouse_grabbed) {
 		SDL_GrabMode new_mode = set_grab_mode(SDL_GRAB_ON);
 		if (new_mode == SDL_GRAB_ON) {
-			set_window_name(STR_WINDOW_TITLE_GRABBED);
 			disable_mouse_accel();
-			ADBSetRelMouseMode(mouse_grabbed = true);
+			mouse_grabbed = true;
 		}
 	}
 }
@@ -817,9 +815,8 @@
 	if (mouse_grabbed) {
 		SDL_GrabMode new_mode = set_grab_mode(SDL_GRAB_OFF);
 		if (new_mode == SDL_GRAB_OFF) {
-			set_window_name(STR_WINDOW_TITLE);
 			restore_mouse_accel();
-			ADBSetRelMouseMode(mouse_grabbed = false);
+			mouse_grabbed = false;
 		}
 	}
 }
@@ -1279,6 +1276,13 @@
 	if (toggle_fullscreen)
 		do_toggle_fullscreen();
 
+	// Setting the window name must happen on the main thread, else it doesn't work on
+	// some platforms - e.g. macOS Sierra.
+	if (mouse_grabbed_window_name_status != mouse_grabbed) {
+		set_window_name(mouse_grabbed ? STR_WINDOW_TITLE_GRABBED : STR_WINDOW_TITLE);
+		mouse_grabbed_window_name_status = mouse_grabbed;
+	}
+
 	// Temporarily give up frame buffer lock (this is the point where
 	// we are suspended when the user presses Ctrl-Tab)
 	UNLOCK_FRAME_BUFFER;
@@ -1301,6 +1305,13 @@
 	if (toggle_fullscreen)
 		do_toggle_fullscreen();
 
+	// Setting the window name must happen on the main thread, else it doesn't work on
+	// some platforms - e.g. macOS Sierra.
+	if (mouse_grabbed_window_name_status != mouse_grabbed) {
+		set_window_name(mouse_grabbed ? STR_WINDOW_TITLE_GRABBED : STR_WINDOW_TITLE);
+		mouse_grabbed_window_name_status = mouse_grabbed;
+	}
+
 	// Temporarily give up frame buffer lock (this is the point where
 	// we are suspended when the user presses Ctrl-Tab)
 	UNLOCK_FRAME_BUFFER;
@@ -1751,11 +1762,7 @@
 
 			// Mouse moved
 			case SDL_MOUSEMOTION:
-				if (mouse_grabbed) {
-					drv->mouse_moved(event.motion.xrel, event.motion.yrel);
-				} else {
-					drv->mouse_moved(event.motion.x, event.motion.y);
-				}
+				drv->mouse_moved(event.motion.x, event.motion.y);
 				break;
 
 			// Keyboard
@@ -1825,7 +1832,7 @@
 			// Application activate/deactivate
 			case SDL_ACTIVEEVENT:
 				// Force a complete window refresh when activating, to avoid redraw artifacts otherwise.
-				if (event.active.gain && (event.active.state & SDL_APPACTIVE))
+				if (event.active.gain)
 					force_complete_window_refresh();
 				break;
 			}
diff --git a/SheepShaver/src/adb.cpp b/SheepShaver/src/adb.cpp
deleted file mode 120000
index 1cc36b9..0000000
--- a/SheepShaver/src/adb.cpp
+++ /dev/null
@@ -1 +0,0 @@
-../../BasiliskII/src/adb.cpp
\ No newline at end of file
diff --git a/SheepShaver/src/adb.cpp b/SheepShaver/src/adb.cpp
new file mode 100644
index 0000000..27d1de7
--- /dev/null
+++ b/SheepShaver/src/adb.cpp
@@ -0,0 +1,460 @@
+/*
+ *  adb.cpp - ADB emulation (mouse/keyboard)
+ *
+ *  Basilisk II (C) Christian Bauer
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/*
+ *  SEE ALSO
+ *    Inside Macintosh: Devices, chapter 5 "ADB Manager"
+ *    Technote HW 01: "ADB - The Untold Story: Space Aliens Ate My Mouse"
+ */
+
+#include <stdlib.h>
+
+#include "sysdeps.h"
+#include "cpu_emulation.h"
+#include "emul_op.h"
+#include "main.h"
+#include "prefs.h"
+#include "video.h"
+#include "adb.h"
+
+#ifdef POWERPC_ROM
+#include "thunks.h"
+#endif
+
+#define DEBUG 0
+#include "debug.h"
+
+
+// Global variables
+static int mouse_x = 0, mouse_y = 0;							// Mouse position
+static int old_mouse_x = 0, old_mouse_y = 0;
+static bool mouse_button[3] = {false, false, false};			// Mouse button states
+static bool old_mouse_button[3] = {false, false, false};
+static bool relative_mouse = false;
+
+static uint8 key_states[16];				// Key states (Mac keycodes)
+#define MATRIX(code) (key_states[code >> 3] & (1 << (~code & 7)))
+
+// Keyboard event buffer (Mac keycodes with up/down flag)
+const int KEY_BUFFER_SIZE = 16;
+static uint8 key_buffer[KEY_BUFFER_SIZE];
+static unsigned int key_read_ptr = 0, key_write_ptr = 0;
+
+static uint8 mouse_reg_3[2] = {0x63, 0x01};	// Mouse ADB register 3
+
+static uint8 key_reg_2[2] = {0xff, 0xff};	// Keyboard ADB register 2
+static uint8 key_reg_3[2] = {0x62, 0x05};	// Keyboard ADB register 3
+
+static uint8 m_keyboard_type = 0x05;
+
+// ADB mouse motion lock (for platforms that use separate input thread)
+static B2_mutex *mouse_lock;
+
+
+/*
+ *  Initialize ADB emulation
+ */
+
+void ADBInit(void)
+{
+	mouse_lock = B2_create_mutex();
+	m_keyboard_type = (uint8)PrefsFindInt32("keyboardtype");
+	key_reg_3[1] = m_keyboard_type;
+}
+
+
+/*
+ *  Exit ADB emulation
+ */
+
+void ADBExit(void)
+{
+	if (mouse_lock) {
+		B2_delete_mutex(mouse_lock);
+		mouse_lock = NULL;
+	}
+}
+
+
+/*
+ *  ADBOp() replacement
+ */
+
+void ADBOp(uint8 op, uint8 *data)
+{
+	D(bug("ADBOp op %02x, data %02x %02x %02x\n", op, data[0], data[1], data[2]));
+
+	// ADB reset?
+	if ((op & 0x0f) == 0) {
+		mouse_reg_3[0] = 0x63;
+		mouse_reg_3[1] = 0x01;
+		key_reg_2[0] = 0xff;
+		key_reg_2[1] = 0xff;
+		key_reg_3[0] = 0x62;
+		key_reg_3[1] = m_keyboard_type;
+		return;
+	}
+
+	// Cut op into fields
+	uint8 adr = op >> 4;
+	uint8 cmd = (op >> 2) & 3;
+	uint8 reg = op & 3;
+
+	// Check which device was addressed and act accordingly
+	if (adr == (mouse_reg_3[0] & 0x0f)) {
+
+		// Mouse
+		if (cmd == 2) {
+
+			// Listen
+			switch (reg) {
+				case 3:		// Address/HandlerID
+					if (data[2] == 0xfe)			// Change address
+						mouse_reg_3[0] = (mouse_reg_3[0] & 0xf0) | (data[1] & 0x0f);
+					else if (data[2] == 1 || data[2] == 2 || data[2] == 4)	// Change device handler ID
+						mouse_reg_3[1] = data[2];
+					else if (data[2] == 0x00)		// Change address and enable bit
+						mouse_reg_3[0] = (mouse_reg_3[0] & 0xd0) | (data[1] & 0x2f);
+					break;
+			}
+
+		} else if (cmd == 3) {
+
+			// Talk
+			switch (reg) {
+				case 1:		// Extended mouse protocol
+					data[0] = 8;
+					data[1] = 'a';				// Identifier
+					data[2] = 'p';
+					data[3] = 'p';
+					data[4] = 'l';
+					data[5] = 300 >> 8;			// Resolution (dpi)
+					data[6] = 300 & 0xff;
+					data[7] = 1;				// Class (mouse)
+					data[8] = 3;				// Number of buttons
+					break;
+				case 3:		// Address/HandlerID
+					data[0] = 2;
+					data[1] = mouse_reg_3[0] & 0xf0 | (rand() & 0x0f);
+					data[2] = mouse_reg_3[1];
+					break;
+				default:
+					data[0] = 0;
+					break;
+			}
+		}
+		D(bug(" mouse reg 3 %02x%02x\n", mouse_reg_3[0], mouse_reg_3[1]));
+
+	} else if (adr == (key_reg_3[0] & 0x0f)) {
+
+		// Keyboard
+		if (cmd == 2) {
+
+			// Listen
+			switch (reg) {
+				case 2:		// LEDs/Modifiers
+					key_reg_2[0] = data[1];
+					key_reg_2[1] = data[2];
+					break;
+				case 3:		// Address/HandlerID
+					if (data[2] == 0xfe)			// Change address
+							key_reg_3[0] = (key_reg_3[0] & 0xf0) | (data[1] & 0x0f);
+					else if (data[2] == 0x00)		// Change address and enable bit
+						key_reg_3[0] = (key_reg_3[0] & 0xd0) | (data[1] & 0x2f);
+					break;
+			}
+
+		} else if (cmd == 3) {
+
+			// Talk
+			switch (reg) {
+				case 2: {	// LEDs/Modifiers
+					uint8 reg2hi = 0xff;
+					uint8 reg2lo = key_reg_2[1] | 0xf8;
+					if (MATRIX(0x6b))	// Scroll Lock
+						reg2lo &= ~0x40;
+					if (MATRIX(0x47))	// Num Lock
+						reg2lo &= ~0x80;
+					if (MATRIX(0x37))	// Command
+						reg2hi &= ~0x01;
+					if (MATRIX(0x3a))	// Option
+						reg2hi &= ~0x02;
+					if (MATRIX(0x38))	// Shift
+						reg2hi &= ~0x04;
+					if (MATRIX(0x36))	// Control
+						reg2hi &= ~0x08;
+					if (MATRIX(0x39))	// Caps Lock
+						reg2hi &= ~0x20;
+					if (MATRIX(0x75))	// Delete
+						reg2hi &= ~0x40;
+					data[0] = 2;
+					data[1] = reg2hi;
+					data[2] = reg2lo;
+					break;
+				}
+				case 3:		// Address/HandlerID
+					data[0] = 2;
+					data[1] = key_reg_3[0] & 0xf0 | (rand() & 0x0f);
+					data[2] = key_reg_3[1];
+					break;
+				default:
+					data[0] = 0;
+					break;
+			}
+		}
+		D(bug(" keyboard reg 3 %02x%02x\n", key_reg_3[0], key_reg_3[1]));
+
+	} else												// Unknown address
+		if (cmd == 3)
+			data[0] = 0;								// Talk: 0 bytes of data
+}
+
+
+/*
+ *  Mouse was moved (x/y are absolute or relative, depending on ADBSetRelMouseMode())
+ */
+
+void ADBMouseMoved(int x, int y)
+{
+	B2_lock_mutex(mouse_lock);
+	if (relative_mouse) {
+		mouse_x += x; mouse_y += y;
+	} else {
+		mouse_x = x; mouse_y = y;
+	}
+	B2_unlock_mutex(mouse_lock);
+	SetInterruptFlag(INTFLAG_ADB);
+	TriggerInterrupt();
+}
+
+
+/* 
+ *  Mouse button pressed
+ */
+
+void ADBMouseDown(int button)
+{
+	mouse_button[button] = true;
+	SetInterruptFlag(INTFLAG_ADB);
+	TriggerInterrupt();
+}
+
+
+/*
+ *  Mouse button released
+ */
+
+void ADBMouseUp(int button)
+{
+	mouse_button[button] = false;
+	SetInterruptFlag(INTFLAG_ADB);
+	TriggerInterrupt();
+}
+
+
+/*
+ *  Set mouse mode (absolute or relative)
+ */
+
+void ADBSetRelMouseMode(bool relative)
+{
+	if (relative_mouse != relative) {
+		relative_mouse = relative;
+		mouse_x = mouse_y = 0;
+	}
+}
+
+
+/*
+ *  Key pressed ("code" is the Mac key code)
+ */
+
+void ADBKeyDown(int code)
+{
+	// Add keycode to buffer
+	key_buffer[key_write_ptr] = code;
+	key_write_ptr = (key_write_ptr + 1) % KEY_BUFFER_SIZE;
+
+	// Set key in matrix
+	key_states[code >> 3] |= (1 << (~code & 7));
+
+	// Trigger interrupt
+	SetInterruptFlag(INTFLAG_ADB);
+	TriggerInterrupt();
+}
+
+
+/*
+ *  Key released ("code" is the Mac key code)
+ */
+
+void ADBKeyUp(int code)
+{
+	// Add keycode to buffer
+	key_buffer[key_write_ptr] = code | 0x80;	// Key-up flag
+	key_write_ptr = (key_write_ptr + 1) % KEY_BUFFER_SIZE;
+
+	// Clear key in matrix
+	key_states[code >> 3] &= ~(1 << (~code & 7));
+
+	// Trigger interrupt
+	SetInterruptFlag(INTFLAG_ADB);
+	TriggerInterrupt();
+}
+
+
+/*
+ *  ADB interrupt function (executed as part of 60Hz interrupt)
+ */
+
+void ADBInterrupt(void)
+{
+	M68kRegisters r;
+
+	// Return if ADB is not initialized
+	uint32 adb_base = ReadMacInt32(0xcf8);
+	if (!adb_base || adb_base == 0xffffffff)
+		return;
+	uint32 tmp_data = adb_base + 0x163;	// Temporary storage for faked ADB data
+
+	// Get mouse state
+	B2_lock_mutex(mouse_lock);
+	int mx = mouse_x;
+	int my = mouse_y;
+	if (relative_mouse)
+		mouse_x = mouse_y = 0;
+	bool mb[3] = {mouse_button[0], mouse_button[1], mouse_button[2]};
+	B2_unlock_mutex(mouse_lock);
+
+	uint32 key_base = adb_base + 4;
+	uint32 mouse_base = adb_base + 16;
+
+	if (relative_mouse) {
+
+		// Mouse movement (relative) and buttons
+		if (mx != 0 || my != 0 || mb[0] != old_mouse_button[0] || mb[1] != old_mouse_button[1] || mb[2] != old_mouse_button[2]) {
+
+			// Call mouse ADB handler
+			if (mouse_reg_3[1] == 4) {
+				// Extended mouse protocol
+				WriteMacInt8(tmp_data, 3);
+				WriteMacInt8(tmp_data + 1, (my & 0x7f) | (mb[0] ? 0 : 0x80));
+				WriteMacInt8(tmp_data + 2, (mx & 0x7f) | (mb[1] ? 0 : 0x80));
+				WriteMacInt8(tmp_data + 3, ((my >> 3) & 0x70) | ((mx >> 7) & 0x07) | (mb[2] ? 0x08 : 0x88));
+			} else {
+				// 100/200 dpi mode
+				WriteMacInt8(tmp_data, 2);
+				WriteMacInt8(tmp_data + 1, (my & 0x7f) | (mb[0] ? 0 : 0x80));
+				WriteMacInt8(tmp_data + 2, (mx & 0x7f) | (mb[1] ? 0 : 0x80));
+			}	
+			r.a[0] = tmp_data;
+			r.a[1] = ReadMacInt32(mouse_base);
+			r.a[2] = ReadMacInt32(mouse_base + 4);
+			r.a[3] = adb_base;
+			r.d[0] = (mouse_reg_3[0] << 4) | 0x0c;	// Talk 0
+			Execute68k(r.a[1], &r);
+
+			old_mouse_button[0] = mb[0];
+			old_mouse_button[1] = mb[1];
+			old_mouse_button[2] = mb[2];
+		}
+
+	} else {
+
+		// Update mouse position (absolute)
+		if (mx != old_mouse_x || my != old_mouse_y) {
+#ifdef POWERPC_ROM
+			static const uint8 proc_template[] = {
+				0x2f, 0x08,		// move.l a0,-(sp)
+				0x2f, 0x00,		// move.l d0,-(sp)
+				0x2f, 0x01,		// move.l d1,-(sp)
+				0x70, 0x01,		// moveq #1,d0 (MoveTo)
+				0xaa, 0xdb,		// CursorDeviceDispatch
+				M68K_RTS >> 8, M68K_RTS & 0xff
+			};
+			BUILD_SHEEPSHAVER_PROCEDURE(proc);
+			r.a[0] = ReadMacInt32(mouse_base + 4);
+			r.d[0] = mx;
+			r.d[1] = my;
+			Execute68k(proc, &r);
+#else
+			WriteMacInt16(0x82a, mx);
+			WriteMacInt16(0x828, my);
+			WriteMacInt16(0x82e, mx);
+			WriteMacInt16(0x82c, my);
+			WriteMacInt8(0x8ce, ReadMacInt8(0x8cf));	// CrsrCouple -> CrsrNew
+#endif
+			old_mouse_x = mx;
+			old_mouse_y = my;
+		}
+
+		// Send mouse button events
+		if (mb[0] != old_mouse_button[0] || mb[1] != old_mouse_button[1] || mb[2] != old_mouse_button[2]) {
+			uint32 mouse_base = adb_base + 16;
+
+			// Call mouse ADB handler
+			if (mouse_reg_3[1] == 4) {
+				// Extended mouse protocol
+				WriteMacInt8(tmp_data, 3);
+				WriteMacInt8(tmp_data + 1, mb[0] ? 0 : 0x80);
+				WriteMacInt8(tmp_data + 2, mb[1] ? 0 : 0x80);
+				WriteMacInt8(tmp_data + 3, mb[2] ? 0x08 : 0x88);
+			} else {
+				// 100/200 dpi mode
+				WriteMacInt8(tmp_data, 2);
+				WriteMacInt8(tmp_data + 1, mb[0] ? 0 : 0x80);
+				WriteMacInt8(tmp_data + 2, mb[1] ? 0 : 0x80);
+			}
+			r.a[0] = tmp_data;
+			r.a[1] = ReadMacInt32(mouse_base);
+			r.a[2] = ReadMacInt32(mouse_base + 4);
+			r.a[3] = adb_base;
+			r.d[0] = (mouse_reg_3[0] << 4) | 0x0c;	// Talk 0
+			Execute68k(r.a[1], &r);
+
+			old_mouse_button[0] = mb[0];
+			old_mouse_button[1] = mb[1];
+			old_mouse_button[2] = mb[2];
+		}
+	}
+
+	// Process accumulated keyboard events
+	while (key_read_ptr != key_write_ptr) {
+
+		// Read keyboard event
+		uint8 mac_code = key_buffer[key_read_ptr];
+		key_read_ptr = (key_read_ptr + 1) % KEY_BUFFER_SIZE;
+
+		// Call keyboard ADB handler
+		WriteMacInt8(tmp_data, 2);
+		WriteMacInt8(tmp_data + 1, mac_code);
+		WriteMacInt8(tmp_data + 2, mac_code == 0x7f ? 0x7f : 0xff);	// Power key is special
+		r.a[0] = tmp_data;
+		r.a[1] = ReadMacInt32(key_base);
+		r.a[2] = ReadMacInt32(key_base + 4);
+		r.a[3] = adb_base;
+		r.d[0] = (key_reg_3[0] << 4) | 0x0c;	// Talk 0
+		Execute68k(r.a[1], &r);
+	}
+
+	// Clear temporary data
+	WriteMacInt32(tmp_data, 0);
+	WriteMacInt32(tmp_data + 4, 0);
+}