From c26da073d3baa669a558a3cb07298e057640513f Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Fri, 13 Aug 2010 17:05:06 -0700
Subject: [PATCH] Fixed so the origin of the touch events is the upper left.

---
 src/video/cocoa/SDL_cocoawindow.m | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/video/cocoa/SDL_cocoawindow.m b/src/video/cocoa/SDL_cocoawindow.m
index 656964bd5..04fd0874b 100644
--- a/src/video/cocoa/SDL_cocoawindow.m
+++ b/src/video/cocoa/SDL_cocoawindow.m
@@ -330,9 +330,13 @@ static __inline__ void ConvertNSRect(NSRect *r)
                 return;
             }
         } 
+
+        SDL_FingerID fingerId = (SDL_FingerID)[touch identity];
         float x = [touch normalizedPosition].x;
         float y = [touch normalizedPosition].y;
-        SDL_FingerID fingerId = (SDL_FingerID)[touch identity];
+	/* Make the origin the upper left instead of the lower left */
+	y = 1.0f - y;
+
         switch (type) {
         case COCOA_TOUCH_DOWN:
             SDL_SendFingerDown(touchId, fingerId, SDL_TRUE, x, y, 1);