IPHONE: The overlay will now always be in the native device resolution

svn-id: r52939

9 files changed, 394 insertions, 101 deletions

diff --git a/backends/platform/iphone/iphone_common.h b/backends/platform/iphone/iphone_common.h
index 1f5ed01982..7c7770f443 100644
--- a/backends/platform/iphone/iphone_common.h
+++ b/backends/platform/iphone/iphone_common.h
@@ -67,12 +67,19 @@ void iphone_main(int argc, char *argv[]);
 #endif
 
 // On the ObjC side
-void iPhone_updateScreen();
+void iPhone_updateScreen(int mouseX, int mouseY);
 void iPhone_updateScreenRect(unsigned short* screen, int x1, int y1, int x2, int y2);
+void iPhone_updateOverlayRect(unsigned short* screen, int x1, int y1, int x2, int y2);
 void iPhone_initSurface(int width, int height);
 bool iPhone_fetchEvent(int *outEvent, float *outX, float *outY);
 const char* iPhone_getDocumentsDir();
 bool iPhone_isHighResDevice();
+int iPhone_getScreenHeight();
+int iPhone_getScreenWidth();
+void iPhone_enableOverlay(int state);
+void iPhone_setMouseCursor(short* buffer, int width, int height);
+
+uint getSizeNextPOT(uint size);
 
 #ifdef __cplusplus
 }
diff --git a/backends/platform/iphone/iphone_main.m b/backends/platform/iphone/iphone_main.m
index d8992de5bb..5a5ec95090 100644
--- a/backends/platform/iphone/iphone_main.m
+++ b/backends/platform/iphone/iphone_main.m
@@ -103,15 +103,26 @@ int main(int argc, char** argv) {
 	[NSThread detachNewThreadSelector:@selector(mainLoop:) toTarget:self withObject:nil];
 }
 
+- (void)applicationDidResume
+{
+}
+
+- (void)applicationWillSuspend
+{
+}
+
+- (void)applicationWillTerminate
+{
+}
+
 - (void)applicationSuspend:(struct __GSEvent *)event {
 	//[self setApplicationBadge:NSLocalizedString(@"ON", nil)];
 	[_view applicationSuspend];
 }
 
 - (void)applicationResume:(struct __GSEvent *)event {
-	[self removeApplicationBadge];
 	[_view applicationResume];
-
+	
 	// Workaround, need to "hide" and unhide the statusbar to properly remove it,
 	// since the Springboard has put it back without apparently flagging our application.
     [self setStatusBarHidden:YES animated:YES];
diff --git a/backends/platform/iphone/iphone_video.h b/backends/platform/iphone/iphone_video.h
index 1060a2a223..aed15ecfd5 100644
--- a/backends/platform/iphone/iphone_video.h
+++ b/backends/platform/iphone/iphone_video.h
@@ -54,6 +54,8 @@
 	GLint _visibleWidth;
 	GLint _visibleHeight;
 	GLuint _screenTexture;
+	GLuint _overlayTexture;
+	GLuint _mouseCursorTexture;
 }
 
 - (id)initWithFrame:(struct CGRect)frame;
@@ -65,6 +67,11 @@
 - (void)initSurface;
 
 - (void)updateSurface;
+- (void)updateMainSurface;
+- (void)updateOverlaySurface;
+- (void)updateMouseSurface;
+
+-(void)updateMouseCursor;
 
 - (id)getEvent;
 
diff --git a/backends/platform/iphone/iphone_video.m b/backends/platform/iphone/iphone_video.m
index cd8b38acb3..9704b302fb 100644
--- a/backends/platform/iphone/iphone_video.m
+++ b/backends/platform/iphone/iphone_video.m
@@ -32,23 +32,88 @@ static int _height = 0;
 static int _fullWidth;
 static int _fullHeight;
 static CGRect _screenRect;
+
 static char* _textureBuffer = 0;
 static int _textureWidth = 0;
 static int _textureHeight = 0;
+
+static char* _overlayTexBuffer = 0;
+static int _overlayTexWidth = 0;
+static int _overlayTexHeight = 0;
+static int _overlayWidth = 0;
+static int _overlayHeight = 0;
+static float _overlayPortraitRatio = 1.0f;
+
 NSLock* _lock = nil;
 static int _needsScreenUpdate = 0;
+static int _overlayIsEnabled = 0;
 
 static UITouch* _firstTouch = NULL;
 static UITouch* _secondTouch = NULL;
 
+static short* _mouseCursor = NULL;
+static int _mouseCursorHeight = 0;
+static int _mouseCursorWidth = 0;
+static int _mouseX = 0;
+static int _mouseY = 0;
+
 // static long lastTick = 0;
 // static int frames = 0;
 
+#define printOpenGLError() printOglError(__FILE__, __LINE__)
+
+int printOglError(const char *file, int line)
+{
+	int     retCode = 0;
+
+	// returns 1 if an OpenGL error occurred, 0 otherwise.
+	GLenum glErr = glGetError();
+	while( glErr != GL_NO_ERROR)
+	{
+		fprintf(stderr, "glError: %u (%s: %d)\n", glErr, file, line );
+		retCode = 1;
+		glErr = glGetError();
+	}
+	return retCode;
+}
+
+void iPhone_setMouseCursor(short* buffer, int width, int height) {
+	_mouseCursor = buffer;
+
+	_mouseCursorWidth = width;
+	_mouseCursorHeight = height;
+
+	[sharedInstance performSelectorOnMainThread:@selector(updateMouseCursor) withObject:nil waitUntilDone: YES];
+}
+
+void iPhone_enableOverlay(int state) {
+	_overlayIsEnabled = state;
+}
+
+int iPhone_getScreenHeight() {
+	return _overlayHeight;
+}
+
+int iPhone_getScreenWidth() {
+	return _overlayWidth;
+}
+
 bool iPhone_isHighResDevice() {
 	return _fullHeight > 480;
 }
 
-void iPhone_updateScreen() {
+void iPhone_updateScreen(int mouseX, int mouseY) {
+	//printf("Mouse: (%i, %i)\n", mouseX, mouseY);
+
+	//_mouseX = _overlayHeight - (float)mouseX / _width * _overlayHeight;
+	//_mouseY = (float)mouseY / _height * _overlayWidth;
+
+	//_mouseX = _overlayHeight - mouseX;
+	//_mouseY = mouseY;
+
+	_mouseX = (_overlayWidth - mouseX) / (float)_overlayWidth * _overlayHeight;
+	_mouseY = mouseY / (float)_overlayHeight * _overlayWidth;
+
 	if (!_needsScreenUpdate) {
 		_needsScreenUpdate = 1;
 		[sharedInstance performSelectorOnMainThread:@selector(updateSurface) withObject:nil waitUntilDone: NO];
@@ -56,16 +121,17 @@ void iPhone_updateScreen() {
 }
 
 void iPhone_updateScreenRect(unsigned short* screen, int x1, int y1, int x2, int y2) {
-	//[_lock lock];
-
 	int y;
-	for (y = y1; y < y2; ++y) {
+	for (y = y1; y < y2; ++y)
 		memcpy(&_textureBuffer[(y * _textureWidth + x1 )* 2], &screen[y * _width + x1], (x2 - x1) * 2);
-	}
-
-	//[_lock unlock];
 }
 
+void iPhone_updateOverlayRect(unsigned short* screen, int x1, int y1, int x2, int y2) {
+	int y;
+	//printf("Overlaywidth: %u, fullwidth %u\n", _overlayWidth, _fullWidth);
+	for (y = y1; y < y2; ++y)
+		memcpy(&_overlayTexBuffer[(y * _overlayTexWidth + x1 )* 2], &screen[y * _overlayWidth + x1], (x2 - x1) * 2);
+}
 
 void iPhone_initSurface(int width, int height) {
 	_width = width;
@@ -92,6 +158,19 @@ bool iPhone_fetchEvent(int *outEvent, float *outX, float *outY) {
 	return true;
 }
 
+uint getSizeNextPOT(uint size) {
+    if ((size & (size - 1)) || !size) {
+        int log = 0;
+
+        while (size >>= 1)
+            ++log;
+
+        size = (2 << log);
+    }
+
+    return size;
+}
+
 const char* iPhone_getDocumentsDir() {
 	NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
 	NSString *documentsDirectory = [paths objectAtIndex:0];
@@ -110,18 +189,6 @@ bool getLocalMouseCoords(CGPoint *point) {
 	return true;
 }
 
-uint getSizeNextPOT(uint size) {
-    if ((size & (size - 1)) || !size) {
-        int log = 0;
-
-        while (size >>= 1)
-            ++log;
-
-        size = (2 << log);
-    }
-
-    return size;
-}
 
 @implementation iPhoneView
 
@@ -131,7 +198,15 @@ uint getSizeNextPOT(uint size) {
 }
 
 - (id)initWithFrame:(struct CGRect)frame {
-	[super initWithFrame: frame];
+	self = [super initWithFrame: frame];
+
+	if([[UIScreen mainScreen] respondsToSelector: NSSelectorFromString(@"scale")])
+	{
+		if([self respondsToSelector: NSSelectorFromString(@"contentScaleFactor")])
+		{
+			//self.contentScaleFactor = [[UIScreen mainScreen] scale];
+		}
+	}
 
 	_fullWidth = frame.size.width;
 	_fullHeight = frame.size.height;
@@ -143,6 +218,8 @@ uint getSizeNextPOT(uint size) {
 	_keyboardView = nil;
 	_context = nil;
 	_screenTexture = 0;
+	_overlayTexture = 0;
+	_mouseCursorTexture = 0;
 
 	return self;
 }
@@ -156,6 +233,8 @@ uint getSizeNextPOT(uint size) {
 
 	if (_screenTexture)
 		free(_textureBuffer);
+	
+	free(_overlayTexBuffer);
 }
 
 - (void *)getSurface {
@@ -181,6 +260,38 @@ uint getSizeNextPOT(uint size) {
 	}
 	_needsScreenUpdate = 0;
 
+	if (_overlayIsEnabled) {
+		glClear(GL_COLOR_BUFFER_BIT); printOpenGLError();
+	}
+
+	[self updateMainSurface];
+	
+	if (_overlayIsEnabled) {
+		[self updateOverlaySurface];		
+		[self updateMouseSurface];
+	}
+
+	glBindRenderbufferOES(GL_RENDERBUFFER_OES, _viewRenderbuffer); printOpenGLError();
+	[_context presentRenderbuffer:GL_RENDERBUFFER_OES];
+
+}
+
+-(void)updateMouseCursor {
+	if (_mouseCursorTexture == 0) {
+		glGenTextures(1, &_mouseCursorTexture); printOpenGLError();
+		glBindTexture(GL_TEXTURE_2D, _mouseCursorTexture); printOpenGLError();
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); printOpenGLError();
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); printOpenGLError();
+	}
+
+	glBindTexture(GL_TEXTURE_2D, _mouseCursorTexture); printOpenGLError();
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, getSizeNextPOT(_mouseCursorWidth), getSizeNextPOT(_mouseCursorHeight), 0, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, _mouseCursor); printOpenGLError();
+
+	free(_mouseCursor);
+	_mouseCursor = NULL;
+}
+
+- (void)updateMainSurface {
 	GLfloat vertices[] = {
 		0.0f + _heightOffset, 0.0f + _widthOffset,
 		_visibleWidth - _heightOffset, 0.0f + _widthOffset,
@@ -198,20 +309,76 @@ uint getSizeNextPOT(uint size) {
 		0.0f, texHeight
 	};
 
-	glVertexPointer(2, GL_FLOAT, 0, vertices);
-	glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
+	glVertexPointer(2, GL_FLOAT, 0, vertices); printOpenGLError();
+	glTexCoordPointer(2, GL_FLOAT, 0, texCoords); printOpenGLError();
+
+	glBindTexture(GL_TEXTURE_2D, _screenTexture); printOpenGLError();
 
-	//[_lock lock];
 	// Unfortunately we have to update the whole texture every frame, since glTexSubImage2D is actually slower in all cases
 	// due to the iPhone internals having to convert the whole texture back from its internal format when used.
 	// In the future we could use several tiled textures instead.
-	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, _textureWidth, _textureHeight, 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, _textureBuffer);
-	//[_lock unlock];
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, _textureWidth, _textureHeight, 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, _textureBuffer); printOpenGLError();
+	glDisable(GL_BLEND);
+	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); printOpenGLError();
+}
 
-	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
-	glBindRenderbufferOES(GL_RENDERBUFFER_OES, _viewRenderbuffer);
-	[_context presentRenderbuffer:GL_RENDERBUFFER_OES];
+- (void)updateOverlaySurface {
+	GLfloat vertices[] = {
+		0.0f, 0.0f,
+		_overlayHeight, 0.0f,
+		0.0f,  _overlayWidth * _overlayPortraitRatio,
+		_overlayHeight,  _overlayWidth * _overlayPortraitRatio
+	};
+
+	float texWidth = _overlayWidth / (float)_overlayTexWidth;
+	float texHeight = _overlayHeight / (float)_overlayTexHeight;
+
+	const GLfloat texCoords[] = {
+		texWidth, 0.0f,
+		0.0f, 0.0f,
+		texWidth, texHeight,
+		0.0f, texHeight
+	};
+
+	glVertexPointer(2, GL_FLOAT, 0, vertices); printOpenGLError();
+	glTexCoordPointer(2, GL_FLOAT, 0, texCoords); printOpenGLError();
 
+	glBindTexture(GL_TEXTURE_2D, _overlayTexture); printOpenGLError();
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, _overlayTexWidth, _overlayTexHeight, 0, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, _overlayTexBuffer); printOpenGLError();
+	glEnable(GL_BLEND);
+	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); printOpenGLError();
+}
+
+- (void)updateMouseSurface {
+	
+	int width = _mouseCursorWidth / (float)_backingWidth * _backingHeight;
+	int height = _mouseCursorHeight / (float)_backingHeight * _backingWidth;
+
+	GLfloat vertices[] = {
+		_mouseX, _mouseY,
+		_mouseX + height, _mouseY,
+		_mouseX, _mouseY + width,
+		_mouseX + height,  _mouseY + width
+	};
+
+	//printf("Cursor: width %u height %u\n", _mouseCursorWidth, _mouseCursorHeight);
+
+	float texWidth = _mouseCursorWidth / (float)getSizeNextPOT(_mouseCursorWidth);
+	float texHeight = _mouseCursorHeight / (float)getSizeNextPOT(_mouseCursorHeight);
+
+	const GLfloat texCoords[] = {
+		texWidth, 0.0f,
+		0.0f, 0.0f,
+		texWidth, texHeight,
+		0.0f, texHeight
+	};
+
+	glVertexPointer(2, GL_FLOAT, 0, vertices); printOpenGLError();
+	glTexCoordPointer(2, GL_FLOAT, 0, texCoords); printOpenGLError();
+
+	glBindTexture(GL_TEXTURE_2D, _mouseCursorTexture); printOpenGLError();
+	glEnable(GL_BLEND);
+	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); printOpenGLError();	
 }
 
 - (void)initSurface {
@@ -232,28 +399,39 @@ uint getSizeNextPOT(uint size) {
 
 		_context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES1];
 		if (!_context || [EAGLContext setCurrentContext:_context]) {
-			glGenFramebuffersOES(1, &_viewFramebuffer);
-			glGenRenderbuffersOES(1, &_viewRenderbuffer);
+			glGenFramebuffersOES(1, &_viewFramebuffer); printOpenGLError();
+			glGenRenderbuffersOES(1, &_viewRenderbuffer); printOpenGLError();
 
-			glBindFramebufferOES(GL_FRAMEBUFFER_OES, _viewFramebuffer);
-			glBindRenderbufferOES(GL_RENDERBUFFER_OES, _viewRenderbuffer);
+			glBindFramebufferOES(GL_FRAMEBUFFER_OES, _viewFramebuffer); printOpenGLError();
+			glBindRenderbufferOES(GL_RENDERBUFFER_OES, _viewRenderbuffer); printOpenGLError();
 			[_context renderbufferStorage:GL_RENDERBUFFER_OES fromDrawable:(id<EAGLDrawable>)self.layer];
-			glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, _viewRenderbuffer);
+			glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, _viewRenderbuffer); printOpenGLError();
 
-			glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_WIDTH_OES, &_backingWidth);
-			glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_HEIGHT_OES, &_backingHeight);
+			glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_WIDTH_OES, &_backingWidth); printOpenGLError();
+			glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_HEIGHT_OES, &_backingHeight); printOpenGLError();
 
 			if (glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES) != GL_FRAMEBUFFER_COMPLETE_OES) {
 				NSLog(@"Failed to make complete framebuffer object %x.", glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES));
 				return;
 			}
 
-			glViewport(0, 0, _backingWidth, _backingHeight);
-			glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+			_overlayHeight = _backingWidth;
+			_overlayWidth = _backingHeight;
+			_overlayTexWidth = getSizeNextPOT(_overlayHeight);
+			_overlayTexHeight = getSizeNextPOT(_overlayWidth);
+
+			int textureSize = _overlayTexWidth * _overlayTexHeight * 2;
+			_overlayTexBuffer = (char *)malloc(textureSize);
+			memset(_overlayTexBuffer, 0, textureSize);
 
-			glEnable(GL_TEXTURE_2D);
-			glEnableClientState(GL_TEXTURE_COORD_ARRAY);
-			glEnableClientState(GL_VERTEX_ARRAY);
+			glViewport(0, 0, _backingWidth, _backingHeight); printOpenGLError();
+			glClearColor(0.0f, 0.0f, 0.0f, 1.0f); printOpenGLError();
+
+			glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+			glEnable(GL_TEXTURE_2D); printOpenGLError();
+			glEnableClientState(GL_TEXTURE_COORD_ARRAY); printOpenGLError();
+			glEnableClientState(GL_VERTEX_ARRAY); printOpenGLError();
 		}
 	}
 
@@ -261,22 +439,32 @@ uint getSizeNextPOT(uint size) {
 	glLoadIdentity();
 
 	if (orientation ==  UIDeviceOrientationLandscapeRight) {
-		glRotatef(-90, 0, 0, 1);
+		glRotatef(-90, 0, 0, 1); printOpenGLError();
 	} else if (orientation == UIDeviceOrientationLandscapeLeft) {
-		glRotatef(90, 0, 0, 1);
+		glRotatef(90, 0, 0, 1); printOpenGLError();
 	} else {
-		glRotatef(180, 0, 0, 1);
+		glRotatef(180, 0, 0, 1); printOpenGLError();
 	}
 
-	glOrthof(0, _backingWidth, 0, _backingHeight, 0, 1);
+	glOrthof(0, _backingWidth, 0, _backingHeight, 0, 1); printOpenGLError();
 
 	if (_screenTexture > 0) {
-		glDeleteTextures(1, &_screenTexture);
+		glDeleteTextures(1, &_screenTexture); printOpenGLError();
+	}
+
+	glGenTextures(1, &_screenTexture); printOpenGLError();
+	glBindTexture(GL_TEXTURE_2D, _screenTexture); printOpenGLError();
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); printOpenGLError();
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); printOpenGLError();
+
+	if (_overlayTexture > 0) {
+		glDeleteTextures(1, &_overlayTexture); printOpenGLError();
 	}
 
-	glGenTextures(1, &_screenTexture);
-	glBindTexture(GL_TEXTURE_2D, _screenTexture);
-	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	glGenTextures(1, &_overlayTexture); printOpenGLError();
+	glBindTexture(GL_TEXTURE_2D, _overlayTexture); printOpenGLError();
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); printOpenGLError();
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); printOpenGLError();
 
 	if (_textureBuffer) {
 		free(_textureBuffer);
@@ -286,12 +474,12 @@ uint getSizeNextPOT(uint size) {
 	_textureBuffer = (char*)malloc(textureSize);
 	memset(_textureBuffer, 0, textureSize);
 
-	glBindRenderbufferOES(GL_RENDERBUFFER_OES, _viewRenderbuffer);
+	glBindRenderbufferOES(GL_RENDERBUFFER_OES, _viewRenderbuffer); printOpenGLError();
 
 	// The color buffer is triple-buffered, so we clear it multiple times right away to avid doing any glClears later.
 	int clearCount = 5;
 	while (clearCount-- > 0) {
-		glClear(GL_COLOR_BUFFER_BIT);
+		glClear(GL_COLOR_BUFFER_BIT); printOpenGLError();
 		[_context presentRenderbuffer:GL_RENDERBUFFER_OES];
 	}
 
@@ -320,6 +508,7 @@ uint getSizeNextPOT(uint size) {
 
 		//printf("Rect: %i, %i, %i, %i\n", _widthOffset, _heightOffset, rectWidth, rectHeight);
 		_screenRect = CGRectMake(_widthOffset, _heightOffset, rectWidth, rectHeight);
+		_overlayPortraitRatio = 1.0f;
 	} else {
 		float ratio = (float)_height / (float)_width;
 		int height = _fullWidth * ratio;
@@ -340,6 +529,7 @@ uint getSizeNextPOT(uint size) {
 		[self addSubview:[_keyboardView inputView]];
 		[self addSubview: _keyboardView];
 		[[_keyboardView inputView] becomeFirstResponder];
+		_overlayPortraitRatio = (_overlayHeight * ratio) / _overlayWidth;
 	}
 }
 
@@ -421,7 +611,7 @@ uint getSizeNextPOT(uint size) {
 
 - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
 {
-	NSSet *allTouches = [event allTouches];
+	//NSSet *allTouches = [event allTouches];
 
 	for (UITouch* touch in touches) {
 		if (touch == _firstTouch) {
diff --git a/backends/platform/iphone/osys_events.cpp b/backends/platform/iphone/osys_events.cpp
index c1c7ffdc0c..f1e3b9ba62 100644
--- a/backends/platform/iphone/osys_events.cpp
+++ b/backends/platform/iphone/osys_events.cpp
@@ -60,16 +60,31 @@ bool OSystem_IPHONE::pollEvent(Common::Event &event) {
 		int y = 0;
 		switch (_screenOrientation) {
 			case kScreenOrientationPortrait:
-				x = (int)(xUnit * _screenWidth);
-				y = (int)(yUnit * _screenHeight);
+				if (_overlayVisible) {
+					x = (int)(xUnit * _overlayWidth);
+					y = (int)(yUnit * _overlayHeight);
+				} else {
+					x = (int)(xUnit * _screenWidth);
+					y = (int)(yUnit * _screenHeight);
+				}
 				break;
 			case kScreenOrientationLandscape:
-				x = (int)(yUnit * _screenWidth);
-				y = (int)((1.0 - xUnit) * _screenHeight);
+				if (_overlayVisible) {
+					x = (int)(yUnit * _overlayWidth);
+					y = (int)((1.0 - xUnit) * _overlayHeight);
+				} else {
+					x = (int)(yUnit * _screenWidth);
+					y = (int)((1.0 - xUnit) * _screenHeight);					
+				}
 				break;
 			case kScreenOrientationFlippedLandscape:
-				x = (int)((1.0 - yUnit) * _screenWidth);
-				y = (int)(xUnit * _screenHeight);
+				if (_overlayVisible) {
+					x = (int)((1.0 - yUnit) * _overlayWidth);
+					y = (int)(xUnit * _overlayHeight);
+				} else {
+					x = (int)((1.0 - yUnit) * _screenWidth);
+					y = (int)(xUnit * _screenHeight);
+				}
 				break;
 		}
 
@@ -262,15 +277,18 @@ bool OSystem_IPHONE::handleEvent_mouseDragged(Common::Event &event, int x, int y
 		mouseNewPosX = (int)(_mouseX - deltaX / 0.5f);
 		mouseNewPosY = (int)(_mouseY - deltaY / 0.5f);
 
+		int widthCap = _overlayVisible ? _overlayWidth : _screenWidth;
+		int heightCap = _overlayVisible ? _overlayHeight : _screenHeight;
+		
 		if (mouseNewPosX < 0)
 			mouseNewPosX = 0;
-		else if (mouseNewPosX > _screenWidth)
-			mouseNewPosX = _screenWidth;
+		else if (mouseNewPosX > widthCap)
+			mouseNewPosX = widthCap;
 
 		if (mouseNewPosY < 0)
 			mouseNewPosY = 0;
-		else if (mouseNewPosY > _screenHeight)
-			mouseNewPosY = _screenHeight;
+		else if (mouseNewPosY > heightCap)
+			mouseNewPosY = heightCap;
 
 	} else {
 		mouseNewPosX = x;
diff --git a/backends/platform/iphone/osys_main.cpp b/backends/platform/iphone/osys_main.cpp
index 6c26b6ca8d..a1fb8f0d5e 100644
--- a/backends/platform/iphone/osys_main.cpp
+++ b/backends/platform/iphone/osys_main.cpp
@@ -54,13 +54,13 @@ void *OSystem_IPHONE::s_soundParam = NULL;
 
 OSystem_IPHONE::OSystem_IPHONE() :
 	_savefile(NULL), _mixer(NULL), _timer(NULL), _offscreen(NULL),
-	_overlayVisible(false), _overlayBuffer(NULL), _fullscreen(NULL),
+	_overlayVisible(false), _fullscreen(NULL),
 	_mouseHeight(0), _mouseWidth(0), _mouseBuf(NULL), _lastMouseTap(0),
 	_secondaryTapped(false), _lastSecondaryTap(0), _screenOrientation(kScreenOrientationFlippedLandscape),
 	_needEventRestPeriod(false), _mouseClickAndDragEnabled(false),
 	_gestureStartX(-1), _gestureStartY(-1), _fullScreenIsDirty(false), _fullScreenOverlayIsDirty(false),
-	_mouseDirty(false), _timeSuspended(0), _lastDragPosX(-1), _lastDragPosY(-1), _screenChangeCount(0)
-
+	_mouseDirty(false), _timeSuspended(0), _lastDragPosX(-1), _lastDragPosY(-1), _screenChangeCount(0),
+	_overlayHeight(0), _overlayWidth(0), _overlayBuffer(0)
 {
 	_queuedInputEvent.type = (Common::EventType)0;
 	_lastDrawnMouseRect = Common::Rect(0, 0, 0, 0);
diff --git a/backends/platform/iphone/osys_main.h b/backends/platform/iphone/osys_main.h
index 3c80c83998..c925078b46 100644
--- a/backends/platform/iphone/osys_main.h
+++ b/backends/platform/iphone/osys_main.h
@@ -66,6 +66,9 @@ protected:
 	Graphics::Surface _framebuffer;
 	byte *_offscreen;
 	OverlayColor  *_overlayBuffer;
+	uint16 _overlayHeight;
+	uint16 _overlayWidth;
+
 	uint16 *_fullscreen;
 
 	uint16  _palette[256];
@@ -144,7 +147,7 @@ public:
 	virtual void copyRectToOverlay(const OverlayColor *buf, int pitch, int x, int y, int w, int h);
 	virtual int16 getOverlayHeight();
 	virtual int16 getOverlayWidth();
-	virtual Graphics::PixelFormat getOverlayFormat() const { return Graphics::createPixelFormat<565>(); }
+	virtual Graphics::PixelFormat getOverlayFormat() const { return Graphics::createPixelFormat<5551>(); }
 
 	virtual bool showMouse(bool visible);
 
diff --git a/backends/platform/iphone/osys_video.cpp b/backends/platform/iphone/osys_video.cpp
index 76c2031758..18acb77524 100644
--- a/backends/platform/iphone/osys_video.cpp
+++ b/backends/platform/iphone/osys_video.cpp
@@ -57,10 +57,10 @@ void OSystem_IPHONE::initSize(uint width, uint height, const Graphics::PixelForm
 	_offscreen = (byte *)malloc(width * height);
 	bzero(_offscreen, width * height);
 
-	free(_overlayBuffer);
+	//free(_overlayBuffer);
 
 	int fullSize = _screenWidth * _screenHeight * sizeof(OverlayColor);
-	_overlayBuffer = (OverlayColor *)malloc(fullSize);
+	//_overlayBuffer = (OverlayColor *)malloc(fullSize);
 	clearOverlay();
 
 	free(_fullscreen);
@@ -70,6 +70,14 @@ void OSystem_IPHONE::initSize(uint width, uint height, const Graphics::PixelForm
 
 	iPhone_initSurface(width, height);
 
+	if (_overlayBuffer == NULL) {
+		_overlayHeight = iPhone_getScreenHeight();
+		_overlayWidth = iPhone_getScreenWidth();
+
+		printf("Overlay: (%u x %u)\n", _overlayWidth, _overlayHeight);
+		_overlayBuffer = new OverlayColor[_overlayHeight * _overlayWidth];
+	}
+
 	_fullScreenIsDirty = false;
 	dirtyFullScreen();
 	_mouseVisible = false;
@@ -187,7 +195,7 @@ void OSystem_IPHONE::updateScreen() {
 	_fullScreenIsDirty = false;
 	_fullScreenOverlayIsDirty = false;
 
-	iPhone_updateScreen();
+	iPhone_updateScreen(_mouseX - _mouseHotspotX, _mouseY - _mouseHotspotY);
 }
 
 void OSystem_IPHONE::internUpdateScreen() {
@@ -222,8 +230,9 @@ void OSystem_IPHONE::internUpdateScreen() {
 
 		if (_overlayVisible)
 			drawDirtyOverlayRect(dirtyRect);
+		else
+			drawMouseCursorOnRectUpdate(dirtyRect, mouseRect);
 
-		drawMouseCursorOnRectUpdate(dirtyRect, mouseRect);
 		updateHardwareSurfaceForRect(dirtyRect);
 	}
 
@@ -234,8 +243,8 @@ void OSystem_IPHONE::internUpdateScreen() {
 			//printf("Drawing: (%i, %i) -> (%i, %i)\n", dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom);
 
 			drawDirtyOverlayRect(dirtyRect);
-			drawMouseCursorOnRectUpdate(dirtyRect, mouseRect);
-			updateHardwareSurfaceForRect(dirtyRect);
+			//drawMouseCursorOnRectUpdate(dirtyRect, mouseRect);
+			//updateHardwareSurfaceForRect(dirtyRect);
 		}
 	}
 }
@@ -256,16 +265,17 @@ void OSystem_IPHONE::drawDirtyRect(const Common::Rect& dirtyRect) {
 }
 
 void OSystem_IPHONE::drawDirtyOverlayRect(const Common::Rect& dirtyRect) {
-	int h = dirtyRect.bottom - dirtyRect.top;
-
-	uint16 *src = (uint16 *)&_overlayBuffer[dirtyRect.top * _screenWidth + dirtyRect.left];
-	uint16 *dst = &_fullscreen[dirtyRect.top * _screenWidth + dirtyRect.left];
-	int x = (dirtyRect.right - dirtyRect.left) * 2;
-	for (int y = h; y > 0; y--) {
-		memcpy(dst, src, x);
-		src += _screenWidth;
-		dst += _screenWidth;
-	}
+	// int h = dirtyRect.bottom - dirtyRect.top;
+	// 
+	// uint16 *src = (uint16 *)&_overlayBuffer[dirtyRect.top * _screenWidth + dirtyRect.left];
+	// uint16 *dst = &_fullscreen[dirtyRect.top * _screenWidth + dirtyRect.left];
+	// int x = (dirtyRect.right - dirtyRect.left) * 2;
+	// for (int y = h; y > 0; y--) {
+	// 	memcpy(dst, src, x);
+	// 	src += _screenWidth;
+	// 	dst += _screenWidth;
+	// }
+	iPhone_updateOverlayRect(_overlayBuffer, dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom );	
 }
 
 void OSystem_IPHONE::drawMouseCursorOnRectUpdate(const Common::Rect& updatedRect, const Common::Rect& mouseRect) {
@@ -283,16 +293,19 @@ void OSystem_IPHONE::drawMouseCursorOnRectUpdate(const Common::Rect& updatedRect
 			srcY -= top;
 			top = 0;
 		}
-			//int right = left + _mouseWidth;
+
 		int bottom = top + _mouseHeight;
 		if (bottom > _screenWidth)
 			bottom = _screenWidth;
-			int displayWidth = _mouseWidth;
+
+		int displayWidth = _mouseWidth;
 		if (_mouseWidth + left > _screenWidth)
 			displayWidth = _screenWidth - left;
-			int displayHeight = _mouseHeight;
+
+		int displayHeight = _mouseHeight;
 		if (_mouseHeight + top > _screenHeight)
 			displayHeight = _screenHeight - top;
+
 		byte *src = &_mouseBuf[srcY * _mouseWidth + srcX];
 		uint16 *dst = &_fullscreen[top * _screenWidth + left];
 		for (int y = displayHeight; y > srcY; y--) {
@@ -337,6 +350,7 @@ void OSystem_IPHONE::showOverlay() {
 	//printf("showOverlay()\n");
 	_overlayVisible = true;
 	dirtyFullOverlayScreen();
+	iPhone_enableOverlay(true);
 }
 
 void OSystem_IPHONE::hideOverlay() {
@@ -344,11 +358,12 @@ void OSystem_IPHONE::hideOverlay() {
 	_overlayVisible = false;
 	_dirtyOverlayRects.clear();
 	dirtyFullScreen();
+	iPhone_enableOverlay(false);
 }
 
 void OSystem_IPHONE::clearOverlay() {
 	//printf("clearOverlay()\n");
-	bzero(_overlayBuffer, _screenWidth * _screenHeight * sizeof(OverlayColor));
+	bzero(_overlayBuffer, _overlayWidth * _overlayHeight * sizeof(OverlayColor));
 	dirtyFullOverlayScreen();
 }
 
@@ -358,8 +373,8 @@ void OSystem_IPHONE::grabOverlay(OverlayColor *buf, int pitch) {
 	OverlayColor *src = _overlayBuffer;
 
 	do {
-		memcpy(buf, src, _screenWidth * sizeof(OverlayColor));
-		src += _screenWidth;
+		memcpy(buf, src, _overlayWidth * sizeof(OverlayColor));
+		src += _overlayWidth;
 		buf += pitch;
 	} while (--h);
 }
@@ -380,11 +395,11 @@ void OSystem_IPHONE::copyRectToOverlay(const OverlayColor *buf, int pitch, int x
 		y = 0;
 	}
 
-	if (w > _screenWidth - x)
-		w = _screenWidth - x;
+	if (w > _overlayWidth - x)
+		w = _overlayWidth - x;
 
-	if (h > _screenHeight - y)
-		h = _screenHeight - y;
+	if (h > _overlayHeight - y)
+		h = _overlayHeight - y;
 
 	if (w <= 0 || h <= 0)
 		return;
@@ -393,24 +408,24 @@ void OSystem_IPHONE::copyRectToOverlay(const OverlayColor *buf, int pitch, int x
 		_dirtyOverlayRects.push_back(Common::Rect(x, y, x + w, y + h));
 	}
 
-	OverlayColor *dst = _overlayBuffer + (y * _screenWidth + x);
-	if (_screenWidth == pitch && pitch == w)
+	OverlayColor *dst = _overlayBuffer + (y * _overlayWidth + x);
+	if (_overlayWidth == pitch && pitch == w)
 		memcpy(dst, buf, h * w * sizeof(OverlayColor));
 	else {
 		do {
 			memcpy(dst, buf, w * sizeof(OverlayColor));
 			buf += pitch;
-			dst += _screenWidth;
+			dst += _overlayWidth;
 		} while (--h);
 	}
 }
 
 int16 OSystem_IPHONE::getOverlayHeight() {
-	return _screenHeight;
+	return _overlayHeight;
 }
 
 int16 OSystem_IPHONE::getOverlayWidth() {
-	return _screenWidth;
+	return _overlayWidth;
 }
 
 bool OSystem_IPHONE::showMouse(bool visible) {
@@ -440,13 +455,31 @@ void OSystem_IPHONE::dirtyFullScreen() {
 void OSystem_IPHONE::dirtyFullOverlayScreen() {
 	if (!_fullScreenOverlayIsDirty) {
 		_dirtyOverlayRects.clear();
-		_dirtyOverlayRects.push_back(Common::Rect(0, 0, _screenWidth, _screenHeight));
+		_dirtyOverlayRects.push_back(Common::Rect(0, 0, _overlayWidth, _overlayHeight));
 		_fullScreenOverlayIsDirty = true;
 	}
 }
 
 void OSystem_IPHONE::setMouseCursor(const byte *buf, uint w, uint h, int hotspotX, int hotspotY, uint32 keycolor, int cursorTargetScale, const Graphics::PixelFormat *format) {
-	//printf("setMouseCursor(%i, %i)\n", hotspotX, hotspotY);
+	//printf("setMouseCursor(%i, %i, scale %u)\n", hotspotX, hotspotY, cursorTargetScale);
+
+	int texWidth = getSizeNextPOT(w);
+	int texHeight = getSizeNextPOT(h);
+	int bufferSize =  texWidth * texHeight * sizeof(int16);
+	int16* mouseBuf = (int16*)malloc(bufferSize);
+	memset(mouseBuf, 0, bufferSize);
+
+	for (int x = 0; x < w; ++x) {
+		for (int y = 0; y < h; ++y) {
+			byte color = buf[y * w + x];
+			if (color != keycolor)
+				mouseBuf[y * texWidth + x] = _palette[color] | 0x1;
+			else
+				mouseBuf[y * texWidth + x] = 0x0;
+		}
+	}
+
+	iPhone_setMouseCursor(mouseBuf, w, h);
 
 	if (_mouseBuf != NULL && (_mouseWidth != w || _mouseHeight != h)) {
 		free(_mouseBuf);
diff --git a/graphics/colormasks.h b/graphics/colormasks.h
index 1ab78fccc5..824d980ca3 100644
--- a/graphics/colormasks.h
+++ b/graphics/colormasks.h
@@ -168,6 +168,30 @@ struct ColorMasks<1555> {
 };
 
 template<>
+struct ColorMasks<5551> {
+	enum {
+		kBytesPerPixel = 2,
+
+		kAlphaBits  = 1,
+		kRedBits    = 5,
+		kGreenBits  = 5,
+		kBlueBits   = 5,
+
+		kAlphaShift = 0,
+		kRedShift   = kGreenBits+kBlueBits+kAlphaBits,
+		kGreenShift = kBlueBits+kAlphaBits,
+		kBlueShift  = kAlphaBits,
+
+		kAlphaMask = ((1 << kAlphaBits) - 1) << kAlphaShift,
+		kRedMask   = ((1 << kRedBits) - 1) << kRedShift,
+		kGreenMask = ((1 << kGreenBits) - 1) << kGreenShift,
+		kBlueMask  = ((1 << kBlueBits) - 1) << kBlueShift,
+
+		kRedBlueMask = kRedMask | kBlueMask
+	};
+};
+
+template<>
 struct ColorMasks<4444> {
 	enum {
 		kBytesPerPixel = 2,