ios: Multi-touch support

ios/RetroArch/AppDelegate.m

@@ -8,8 +8,16 @@
 #import "AppDelegate.h"
 #import "dirlist.h"
 
-extern bool IOS_is_down;
-extern int16_t IOS_touch_x, IOS_touch_y;
+#define MAX_TOUCH 16
+extern struct
+{
+   bool is_down;
+   int16_t screen_x, screen_y;
+   int16_t fixed_x, fixed_y;
+   int16_t full_x, full_y;
+} ios_touches[MAX_TOUCH];
+
+extern uint32_t ios_current_touch_count ;
 
 @implementation AppDelegate
 
@@ -26,34 +34,45 @@ extern int16_t IOS_touch_x, IOS_touch_y;
    [self.window makeKeyAndVisible];
 }
 
+- (void)processTouches:(NSArray*)touches
+{
+   ios_current_touch_count = [touches count];
+   
+   for(int i = 0; i != [touches count]; i ++)
+   {
+      UITouch *touch = [touches objectAtIndex:i];
+      CGPoint coord = [touch locationInView:self.window.rootViewController.view];
+      float scale = [[UIScreen mainScreen] scale];
+      
+      ios_touches[i].is_down = (touch.phase != UITouchPhaseEnded) && (touch.phase != UITouchPhaseCancelled);
+
+      ios_touches[i].screen_x = coord.x * scale;
+      ios_touches[i].screen_y = coord.y * scale;
+   }
+}
+
 - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
 {
-   UITouch *touch = [[event allTouches] anyObject];
-   CGPoint coord = [touch locationInView:self.window.rootViewController.view];
-   float scale = [[UIScreen mainScreen] scale];
-   
-   IOS_is_down = true;
-   IOS_touch_x = coord.x * scale;
-   IOS_touch_y = coord.y * scale;
+   [super touchesBegan:touches withEvent:event];
+   [self processTouches:[[event allTouches] allObjects]];
 }
 
 - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
 {
-   UITouch *touch = [[event allTouches] anyObject];
-   CGPoint coord = [touch locationInView:self.window.rootViewController.view];
-   IOS_is_down = true;
-   IOS_touch_x = coord.x;
-   IOS_touch_y = coord.y;
+   [super touchesMoved:touches withEvent:event];
+   [self processTouches:[[event allTouches] allObjects]];
 }
 
 - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
 {
-   IOS_is_down = false;
+   [super touchesEnded:touches withEvent:event];
+   [self processTouches:[[event allTouches] allObjects]];
 }
 
 - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
 {
-   IOS_is_down = false;
+   [super touchesCancelled:touches withEvent:event];
+   [self processTouches:[[event allTouches] allObjects]];
 }
 
 - (void)applicationWillTerminate:(UIApplication *)application

ios/RetroArch/dirlist.m

@@ -142,8 +142,6 @@ struct dirent_list* build_dirent_list(const char* path)
       else
          window.rootViewController = [[game_view alloc] initWithNibName:@"ViewController_iPad" bundle:nil];
     
-      game_view* game = (game_view*)window.rootViewController;
-      
       extern void ios_load_game(const char*);
       ios_load_game(path);
    }

ios/RetroArch/gameview.m

@@ -50,6 +50,7 @@ static bool ra_done = false;
    [EAGLContext setCurrentContext:gl_context];
    
    gl_view = [[GLKView alloc] initWithFrame:CGRectMake(0, 0, 640, 480) context:gl_context];
+   gl_view.multipleTouchEnabled = YES;
    self.view = gl_view;
 
    screen_scale = [[UIScreen mainScreen] scale];

ios/RetroArch/ios_input.c

@@ -23,37 +23,45 @@
 
 #define MAX_TOUCH 16
 
-bool IOS_is_down;
-int16_t IOS_touch_x, IOS_fix_x;
-int16_t IOS_touch_y, IOS_fix_y;
-int16_t IOS_full_x, IOS_full_y;
+struct
+{
+   bool is_down;
+   int16_t screen_x, screen_y;
+   int16_t fixed_x, fixed_y;
+   int16_t full_x, full_y;
+} ios_touches[MAX_TOUCH];
+
+uint32_t ios_current_touch_count = 0;
 
 static void *ios_input_init(void)
 {
+   memset(ios_touches, 0, sizeof(ios_touches));
    return (void*)-1;
 }
 
 static void ios_input_poll(void *data)
 {
-   input_translate_coord_viewport(IOS_touch_x, IOS_touch_y,
-      &IOS_fix_x, &IOS_fix_y,
-      &IOS_full_x, &IOS_full_y);
+   for (int i = 0; i != ios_current_touch_count; i ++)
+   {
+      input_translate_coord_viewport(ios_touches[i].screen_x, ios_touches[i].screen_y,
+         &ios_touches[i].fixed_x, &ios_touches[i].fixed_y,
+         &ios_touches[i].full_x, &ios_touches[i].full_y);
+   }
 }
 
 static int16_t ios_input_state(void *data, const struct retro_keybind **binds, unsigned port, unsigned device, unsigned index, unsigned id)
 {
-   if (index != 0) return 0;
    switch (device)
    {
       case RARCH_DEVICE_POINTER_SCREEN:
          switch (id)
          {
             case RETRO_DEVICE_ID_POINTER_X:
-               return IOS_full_x;
+               return (index < ios_current_touch_count) ? ios_touches[index].full_x : 0;
             case RETRO_DEVICE_ID_POINTER_Y:
-               return IOS_full_y;
+               return (index < ios_current_touch_count) ? ios_touches[index].full_y : 0;
             case RETRO_DEVICE_ID_POINTER_PRESSED:
-               return IOS_is_down;
+               return (index < ios_current_touch_count) ? ios_touches[index].is_down : 0;
             default:
                return 0;
          }