IPHONE: Fix cursor hotspots.

3 files changed, 19 insertions, 4 deletions

diff --git a/backends/platform/iphone/iphone_common.h b/backends/platform/iphone/iphone_common.h
index d6d3a3dc6f..98d1244054 100644
--- a/backends/platform/iphone/iphone_common.h
+++ b/backends/platform/iphone/iphone_common.h
@@ -75,7 +75,7 @@ bool iPhone_isHighResDevice();
 int iPhone_getScreenHeight();
 int iPhone_getScreenWidth();
 void iPhone_enableOverlay(int state);
-void iPhone_setMouseCursor(short *buffer, int width, int height);
+void iPhone_setMouseCursor(short *buffer, int width, int height, int hotspotX, int hotspotY);
 
 uint getSizeNextPOT(uint size);
 
diff --git a/backends/platform/iphone/iphone_video.m b/backends/platform/iphone/iphone_video.m
index df95b36310..a412945a5e 100644
--- a/backends/platform/iphone/iphone_video.m
+++ b/backends/platform/iphone/iphone_video.m
@@ -51,6 +51,8 @@ static UITouch *_secondTouch = NULL;
 static short *_mouseCursor = NULL;
 static int _mouseCursorHeight = 0;
 static int _mouseCursorWidth = 0;
+static int _mouseCursorHotspotX = 0;
+static int _mouseCursorHotspotY = 0;
 static int _mouseX = 0;
 static int _mouseY = 0;
 
@@ -72,12 +74,15 @@ int printOglError(const char *file, int line) {
 	return retCode;
 }
 
-void iPhone_setMouseCursor(short *buffer, int width, int height) {
+void iPhone_setMouseCursor(short *buffer, int width, int height, int hotspotX, int hotspotY) {
 	_mouseCursor = buffer;
 
 	_mouseCursorWidth = width;
 	_mouseCursorHeight = height;
 
+	_mouseCursorHotspotX = hotspotX;
+	_mouseCursorHotspotY = hotspotY;
+
 	[sharedInstance performSelectorOnMainThread:@selector(updateMouseCursor) withObject:nil waitUntilDone: YES];
 }
 
@@ -354,21 +359,31 @@ bool getLocalMouseCoords(CGPoint *point) {
 	int mouseX = _mouseX;
 	int mouseY = _mouseY;
 
+	int hotspotX = _mouseCursorHotspotX;
+	int hotspotY = _mouseCursorHotspotY;
+
 	if (!_overlayIsEnabled) {
 		const GLint gameWidth = (_visibleHeight - 2 * _widthOffset);
 		const GLint gameHeight = (_visibleWidth - 2 * _heightOffset);
 
 		mouseX = (_width - mouseX) / (float)_width * gameHeight + _heightOffset;
 		mouseY = mouseY / (float)_height * gameWidth + _widthOffset;
+		hotspotX = hotspotX / (float)_width * gameHeight;
+		hotspotY = hotspotY / (float)_height * gameWidth;
 		width = width / (float)_width * gameHeight;
 		height = height / (float)_height * gameWidth;
 	} else {
 		mouseX = (_overlayWidth - mouseX) / (float)_overlayWidth * _backingWidth;
 		mouseY = mouseY / (float)_overlayHeight * _backingHeight;
+		hotspotX = hotspotX / (float)_overlayWidth * _backingWidth;
+		hotspotY = hotspotY / (float)_overlayHeight * _backingHeight;
 		width = width / (float)_overlayWidth * _backingWidth;
 		height = height / (float)_overlayHeight * _backingHeight;
 	}
 
+	mouseX -= hotspotX;
+	mouseY -= hotspotY;
+
 	GLfloat vertices[] = {
 		mouseX        , mouseY,
 		mouseX + width, mouseY,
diff --git a/backends/platform/iphone/osys_video.cpp b/backends/platform/iphone/osys_video.cpp
index ad434153ec..4d3d49c552 100644
--- a/backends/platform/iphone/osys_video.cpp
+++ b/backends/platform/iphone/osys_video.cpp
@@ -170,7 +170,7 @@ void OSystem_IPHONE::updateScreen() {
 	_fullScreenIsDirty = false;
 	_fullScreenOverlayIsDirty = false;
 
-	iPhone_updateScreen(_mouseX - _mouseHotspotX, _mouseY - _mouseHotspotY);
+	iPhone_updateScreen(_mouseX, _mouseY);
 }
 
 void OSystem_IPHONE::internUpdateScreen() {
@@ -380,7 +380,7 @@ void OSystem_IPHONE::setMouseCursor(const byte *buf, uint w, uint h, int hotspot
 		}
 	}
 
-	iPhone_setMouseCursor(mouseBuf, w, h);
+	iPhone_setMouseCursor(mouseBuf, w, h, hotspotX, hotspotY);
 
 	if (_mouseBuf != NULL && (_mouseWidth != w || _mouseHeight != h)) {
 		free(_mouseBuf);