Joypad multiplayer support (Cocoa)

Cocoa/GBPreferencesWindow.m

@@ -19,6 +19,7 @@
     NSEventModifierFlags previousModifiers;
     
     NSPopUpButton *_dmgPopupButton, *_sgbPopupButton, *_cgbPopupButton;
+    NSPopUpButton *_preferredJoypadButton;
 }
 
 + (NSArray *)filterList
@@ -264,6 +265,7 @@
     
     all_mappings[joystick_name] = mapping;
     [[NSUserDefaults standardUserDefaults] setObject:all_mappings forKey:@"GBJoypadMappings"];
+    [self refreshJoypadMenu:nil];
     [self advanceConfigurationStateMachine];
 }
 
@@ -434,4 +436,51 @@
     [self.controlsTableView reloadData];
 }
 
+- (void)setPreferredJoypadButton:(NSPopUpButton *)preferredJoypadButton
+{
+    _preferredJoypadButton = preferredJoypadButton;
+    [self refreshJoypadMenu:nil];
+}
+
+- (NSPopUpButton *)preferredJoypadButton
+{
+    return _preferredJoypadButton;
+}
+
+- (IBAction)refreshJoypadMenu:(id)sender
+{
+    NSArray *joypads = [[[NSUserDefaults standardUserDefaults] dictionaryForKey:@"GBJoypadMappings"] allKeys];
+    for (NSString *joypad in joypads) {
+        if ([self.preferredJoypadButton indexOfItemWithTitle:joypad] == -1) {
+            [self.preferredJoypadButton addItemWithTitle:joypad];
+        }
+    }
+    
+    NSString *player_string = [NSString stringWithFormat: @"%ld", (long)self.playerListButton.selectedTag];
+    NSString *selected_joypad = [[NSUserDefaults standardUserDefaults] dictionaryForKey:@"GBDefaultJoypads"][player_string];
+    if (selected_joypad && [self.preferredJoypadButton indexOfItemWithTitle:selected_joypad] != -1) {
+        [self.preferredJoypadButton selectItemWithTitle:selected_joypad];
+    }
+    else {
+        [self.preferredJoypadButton selectItemWithTitle:@"None"];
+    }
+    [self.controlsTableView reloadData];
+}
+
+- (IBAction)changeDefaultJoypad:(id)sender
+{
+    NSMutableDictionary *default_joypads = [[[NSUserDefaults standardUserDefaults] dictionaryForKey:@"GBDefaultJoypads"] mutableCopy];
+    if (!default_joypads) {
+        default_joypads = [[NSMutableDictionary alloc] init];
+    }
+
+    NSString *player_string = [NSString stringWithFormat: @"%ld", self.playerListButton.selectedTag];
+    if ([[sender titleOfSelectedItem] isEqualToString:@"None"]) {
+        [default_joypads removeObjectForKey:player_string];
+    }
+    else {
+        default_joypads[player_string] = [sender titleOfSelectedItem];
+    }
+    [[NSUserDefaults standardUserDefaults] setObject:default_joypads forKey:@"GBDefaultJoypads"];
+}
 @end

Cocoa/GBView.m

@@ -169,7 +169,7 @@
     bool handled = false;
 
     NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
-    unsigned player_count = GB_is_sgb(_gb)? 4: 1;
+    unsigned player_count = GB_get_player_count(_gb);
     for (unsigned player = 0; player < player_count; player++) {
         for (GBButton button = 0; button < GBButtonCount; button++) {
             NSNumber *key = [defaults valueForKey:button_to_preference_name(button, player)];
@@ -210,7 +210,7 @@
     bool handled = false;
 
     NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
-    unsigned player_count = GB_is_sgb(_gb)? 4: 1;
+    unsigned player_count = GB_get_player_count(_gb);
     for (unsigned player = 0; player < player_count; player++) {
         for (GBButton button = 0; button < GBButtonCount; button++) {
             NSNumber *key = [defaults valueForKey:button_to_preference_name(button, player)];
@@ -245,7 +245,17 @@
 
 - (void) joystick:(NSString *)joystick_name button: (unsigned)button changedState: (bool) state
 {
+    unsigned player_count = GB_get_player_count(_gb);
+
     UpdateSystemActivity(UsrActivity);
+    for (unsigned player = 0; player < player_count; player++) {
+        NSString *preferred_joypad = [[[NSUserDefaults standardUserDefaults] dictionaryForKey:@"GBDefaultJoypads"]
+                                      objectForKey:[NSString stringWithFormat:@"%u", player]];
+        if (player_count != 1 && // Single player, accpet inputs from all joypads
+            !(player == 0 && !preferred_joypad) && // Multiplayer, but player 1 has no joypad configured, so it takes inputs from all joypads
+            ![preferred_joypad isEqualToString:joystick_name]) {
+            continue;
+        }
         NSDictionary *mapping = [[NSUserDefaults standardUserDefaults] dictionaryForKey:@"GBJoypadMappings"][joystick_name];
         
         for (GBButton i = 0; i < GBButtonCount; i++) {
@@ -268,16 +278,28 @@
                         break;
                         
                     default:
-                    GB_set_key_state(_gb, (GB_key_t)i, state);
+                        GB_set_key_state_for_player(_gb, (GB_key_t)i, player, state);
                         break;
                 }
             }
         }
     }
+}
 
 - (void) joystick:(NSString *)joystick_name axis: (unsigned)axis movedTo: (signed) value
 {
+    unsigned player_count = GB_get_player_count(_gb);
+
     UpdateSystemActivity(UsrActivity);
+    for (unsigned player = 0; player < player_count; player++) {
+        NSString *preferred_joypad = [[[NSUserDefaults standardUserDefaults] dictionaryForKey:@"GBDefaultJoypads"]
+                                      objectForKey:[NSString stringWithFormat:@"%u", player]];
+        if (player_count != 1 && // Single player, accpet inputs from all joypads
+            !(player == 0 && !preferred_joypad) && // Multiplayer, but player 1 has no joypad configured, so it takes inputs from all joypads
+            ![preferred_joypad isEqualToString:joystick_name]) {
+            continue;
+        }
+        
         NSDictionary *mapping = [[NSUserDefaults standardUserDefaults] dictionaryForKey:@"GBJoypadMappings"][joystick_name];
         NSNumber *x_axis = [mapping objectForKey:@"XAxis"];
         NSNumber *y_axis = [mapping objectForKey:@"YAxis"];
@@ -285,35 +307,36 @@
         if (axis == [x_axis integerValue]) {
             if (value > JOYSTICK_HIGH) {
                 axisActive[0] = true;
-            GB_set_key_state(_gb, GB_KEY_RIGHT, true);
+                GB_set_key_state_for_player(_gb, GB_KEY_RIGHT, player, true);
-            GB_set_key_state(_gb, GB_KEY_LEFT, false);
+                GB_set_key_state_for_player(_gb, GB_KEY_LEFT, player, false);
             }
             else if (value < -JOYSTICK_HIGH) {
                 axisActive[0] = true;
-            GB_set_key_state(_gb, GB_KEY_RIGHT, false);
+                GB_set_key_state_for_player(_gb, GB_KEY_RIGHT, player, false);
-            GB_set_key_state(_gb, GB_KEY_LEFT, true);
+                GB_set_key_state_for_player(_gb, GB_KEY_LEFT, player, true);
             }
             else if (axisActive[0] && value < JOYSTICK_LOW && value > -JOYSTICK_LOW) {
                 axisActive[0] = false;
-            GB_set_key_state(_gb, GB_KEY_RIGHT, false);
+                GB_set_key_state_for_player(_gb, GB_KEY_RIGHT, player, false);
-            GB_set_key_state(_gb, GB_KEY_LEFT, false);
+                GB_set_key_state_for_player(_gb, GB_KEY_LEFT, player, false);
             }
         }
         else if (axis == [y_axis integerValue]) {
             if (value > JOYSTICK_HIGH) {
                 axisActive[1] = true;
-            GB_set_key_state(_gb, GB_KEY_DOWN, true);
+                GB_set_key_state_for_player(_gb, GB_KEY_DOWN, player, true);
-            GB_set_key_state(_gb, GB_KEY_UP, false);
+                GB_set_key_state_for_player(_gb, GB_KEY_UP, player, false);
             }
             else if (value < -JOYSTICK_HIGH) {
                 axisActive[1] = true;
-            GB_set_key_state(_gb, GB_KEY_DOWN, false);
+                GB_set_key_state_for_player(_gb, GB_KEY_DOWN, player, false);
-            GB_set_key_state(_gb, GB_KEY_UP, true);
+                GB_set_key_state_for_player(_gb, GB_KEY_UP, player, true);
             }
             else if (axisActive[1] && value < JOYSTICK_LOW && value > -JOYSTICK_LOW) {
                 axisActive[1] = false;
-            GB_set_key_state(_gb, GB_KEY_DOWN, false);
+                GB_set_key_state_for_player(_gb, GB_KEY_DOWN, player, false);
-            GB_set_key_state(_gb, GB_KEY_UP, false);
+                GB_set_key_state_for_player(_gb, GB_KEY_UP, player, false);
+            }
         }
     }
 }

Cocoa/Preferences.xib

@@ -373,7 +373,7 @@
             <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
             <subviews>
                 <button verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="Qa7-Z7-yfO">
-                    <rect key="frame" x="20" y="9" width="168" height="32"/>
+                    <rect key="frame" x="20" y="9" width="188" height="32"/>
                     <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
                     <buttonCell key="cell" type="push" title="Configure a Joypad" bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="GdK-tQ-Wim">
                         <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
@@ -383,17 +383,6 @@
                         <action selector="configureJoypad:" target="QvC-M9-y7g" id="IfY-Kc-PKU"/>
                     </connections>
                 </button>
-                <button verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="d2I-jU-sLb">
-                    <rect key="frame" x="200" y="9" width="72" height="32"/>
-                    <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
-                    <buttonCell key="cell" type="push" title="Skip" bezelStyle="rounded" alignment="center" enabled="NO" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="sug-xy-tbw">
-                        <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
-                        <font key="font" metaFont="system"/>
-                    </buttonCell>
-                    <connections>
-                        <action selector="skipButton:" target="QvC-M9-y7g" id="aw8-sw-yJw"/>
-                    </connections>
-                </button>
                 <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="Utu-t4-cLx">
                     <rect key="frame" x="10" y="339" width="122" height="17"/>
                     <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
@@ -471,7 +460,7 @@
                     </textFieldCell>
                 </textField>
                 <popUpButton verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="0Az-0R-oNw">
-                    <rect key="frame" x="42" y="60" width="208" height="26"/>
+                    <rect key="frame" x="42" y="61" width="208" height="26"/>
                     <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
                     <popUpButtonCell key="cell" type="push" title="None" bezelStyle="rounded" alignment="left" lineBreakMode="truncatingTail" state="on" borderStyle="borderAndBezel" imageScaling="proportionallyDown" inset="2" selectedItem="hy8-cr-RrE" id="uEC-vN-8Jq">
                         <behavior key="behavior" lightByBackground="YES" lightByGray="YES"/>
@@ -482,6 +471,9 @@
                             </items>
                         </menu>
                     </popUpButtonCell>
+                    <connections>
+                        <action selector="changeDefaultJoypad:" target="QvC-M9-y7g" id="TP2-Ug-Jpy"/>
+                    </connections>
                 </popUpButton>
                 <box verticalHuggingPriority="750" fixedFrame="YES" boxType="separator" translatesAutoresizingMaskIntoConstraints="NO" id="VEc-Ed-Z6f">
                     <rect key="frame" x="12" y="48" width="268" height="5"/>
@@ -512,9 +504,20 @@
                         </menu>
                     </popUpButtonCell>
                     <connections>
-                        <action selector="reloadButtonsData:" target="QvC-M9-y7g" id="HCM-gW-m5j"/>
+                        <action selector="refreshJoypadMenu:" target="QvC-M9-y7g" id="5hY-tg-9VE"/>
                     </connections>
                 </popUpButton>
+                <button verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="d2I-jU-sLb">
+                    <rect key="frame" x="212" y="9" width="60" height="32"/>
+                    <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
+                    <buttonCell key="cell" type="push" title="Skip" bezelStyle="rounded" alignment="center" enabled="NO" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="sug-xy-tbw">
+                        <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
+                        <font key="font" metaFont="system"/>
+                    </buttonCell>
+                    <connections>
+                        <action selector="skipButton:" target="QvC-M9-y7g" id="aw8-sw-yJw"/>
+                    </connections>
+                </button>
             </subviews>
             <point key="canvasLocation" x="-159" y="1116"/>
         </customView>

Core/gb.c

@@ -789,3 +789,8 @@ size_t GB_get_screen_height(GB_gameboy_t *gb)
 {
     return GB_is_sgb(gb)? 224 : 144;
 }
+
+unsigned GB_get_player_count(GB_gameboy_t *gb)
+{
+    return GB_is_sgb(gb)? gb->sgb->player_count : 1;
+}

Core/gb.h

@@ -675,4 +675,6 @@ void GB_set_clock_multiplier(GB_gameboy_t *gb, double multiplier);
 size_t GB_get_screen_width(GB_gameboy_t *gb);
 size_t GB_get_screen_height(GB_gameboy_t *gb);
 
+unsigned GB_get_player_count(GB_gameboy_t *gb);
+
 #endif /* GB_h */