diff --git a/English.lproj/MainMenu.xib b/English.lproj/MainMenu.xib
index de94f31..1d65f2f 100644
--- a/English.lproj/MainMenu.xib
+++ b/English.lproj/MainMenu.xib
@@ -2,7 +2,7 @@
 <archive type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="7.10">
 	<data>
 		<int key="IBDocument.SystemTarget">1060</int>
-		<string key="IBDocument.SystemVersion">10H574</string>
+		<string key="IBDocument.SystemVersion">10J869</string>
 		<string key="IBDocument.InterfaceBuilderVersion">823</string>
 		<string key="IBDocument.AppKitVersion">1038.35</string>
 		<string key="IBDocument.HIToolboxVersion">461.00</string>
@@ -12,10 +12,10 @@
 		</object>
 		<object class="NSMutableArray" key="IBDocument.EditedObjectIDs">
 			<bool key="EncodedWithXMLCoder">YES</bool>
-			<integer value="577"/>
-			<integer value="57"/>
+			<integer value="372"/>
 			<integer value="639"/>
-			<integer value="371"/>
+			<integer value="57"/>
+			<integer value="577"/>
 		</object>
 		<object class="NSArray" key="IBDocument.PluginDependencies">
 			<bool key="EncodedWithXMLCoder">YES</bool>
@@ -1224,7 +1224,7 @@
 			<object class="NSWindowTemplate" id="972006081">
 				<int key="NSWindowStyleMask">13</int>
 				<int key="NSWindowBacking">2</int>
-				<string key="NSWindowRect">{{142, 445}, {524, 431}}</string>
+				<string key="NSWindowRect">{{142, 420}, {524, 456}}</string>
 				<int key="NSWTFlags">1948778496</int>
 				<string key="NSWindowTitle">Tile Cutter</string>
 				<string key="NSWindowClass">NSWindow</string>
@@ -1239,7 +1239,7 @@
 						<object class="NSTextField" id="388782215">
 							<reference key="NSNextResponder" ref="439893737"/>
 							<int key="NSvFlags">292</int>
-							<string key="NSFrame">{{20, 17}, {48, 22}}</string>
+							<string key="NSFrame">{{20, 42}, {48, 22}}</string>
 							<reference key="NSSuperview" ref="439893737"/>
 							<bool key="NSViewCanDrawConcurrently">YES</bool>
 							<bool key="NSEnabled">YES</bool>
@@ -1346,7 +1346,7 @@
 						<object class="NSTextField" id="325727179">
 							<reference key="NSNextResponder" ref="439893737"/>
 							<int key="NSvFlags">292</int>
-							<string key="NSFrame">{{73, 22}, {12, 17}}</string>
+							<string key="NSFrame">{{73, 47}, {12, 17}}</string>
 							<reference key="NSSuperview" ref="439893737"/>
 							<bool key="NSEnabled">YES</bool>
 							<object class="NSTextFieldCell" key="NSCell" id="129700481">
@@ -1375,7 +1375,7 @@
 						<object class="NSTextField" id="362709764">
 							<reference key="NSNextResponder" ref="439893737"/>
 							<int key="NSvFlags">292</int>
-							<string key="NSFrame">{{90, 17}, {48, 22}}</string>
+							<string key="NSFrame">{{90, 42}, {48, 22}}</string>
 							<reference key="NSSuperview" ref="439893737"/>
 							<bool key="NSViewCanDrawConcurrently">YES</bool>
 							<bool key="NSEnabled">YES</bool>
@@ -1441,7 +1441,7 @@
 						<object class="NSButton" id="501463471">
 							<reference key="NSNextResponder" ref="439893737"/>
 							<int key="NSvFlags">289</int>
-							<string key="NSFrame">{{441, 11}, {69, 32}}</string>
+							<string key="NSFrame">{{441, 36}, {69, 32}}</string>
 							<reference key="NSSuperview" ref="439893737"/>
 							<bool key="NSEnabled">YES</bool>
 							<object class="NSButtonCell" key="NSCell" id="731409929">
@@ -1468,7 +1468,7 @@
 									<string>NSColor pasteboard type</string>
 								</object>
 							</object>
-							<string key="NSFrame">{{395, 16}, {44, 23}}</string>
+							<string key="NSFrame">{{395, 41}, {44, 23}}</string>
 							<reference key="NSSuperview" ref="439893737"/>
 							<bool key="NSEnabled">YES</bool>
 							<bool key="NSIsBordered">YES</bool>
@@ -1480,7 +1480,7 @@
 						<object class="NSTextField" id="764679189">
 							<reference key="NSNextResponder" ref="439893737"/>
 							<int key="NSvFlags">289</int>
-							<string key="NSFrame">{{307, 20}, {83, 17}}</string>
+							<string key="NSFrame">{{307, 45}, {83, 17}}</string>
 							<reference key="NSSuperview" ref="439893737"/>
 							<bool key="NSEnabled">YES</bool>
 							<object class="NSTextFieldCell" key="NSCell" id="816381209">
@@ -1508,7 +1508,7 @@
 									<string>NeXT TIFF v4.0 pasteboard type</string>
 								</object>
 							</object>
-							<string key="NSFrame">{{20, 47}, {484, 367}}</string>
+							<string key="NSFrame">{{20, 72}, {484, 367}}</string>
 							<reference key="NSSuperview" ref="439893737"/>
 							<bool key="NSEnabled">YES</bool>
 							<object class="NSImageCell" key="NSCell" id="198954573">
@@ -1524,7 +1524,7 @@
 						<object class="NSButton" id="710519989">
 							<reference key="NSNextResponder" ref="439893737"/>
 							<int key="NSvFlags">289</int>
-							<string key="NSFrame">{{195, 20}, {103, 18}}</string>
+							<string key="NSFrame">{{195, 45}, {103, 18}}</string>
 							<reference key="NSSuperview" ref="439893737"/>
 							<bool key="NSEnabled">YES</bool>
 							<object class="NSButtonCell" key="NSCell" id="626978139">
@@ -1535,11 +1535,11 @@
 								<reference key="NSControlView" ref="710519989"/>
 								<int key="NSButtonFlags">1211912703</int>
 								<int key="NSButtonFlags2">2</int>
-								<object class="NSCustomResource" key="NSNormalImage">
+								<object class="NSCustomResource" key="NSNormalImage" id="1037310102">
 									<string key="NSClassName">NSImage</string>
 									<string key="NSResourceName">NSSwitch</string>
 								</object>
-								<object class="NSButtonImageSource" key="NSAlternateImage">
+								<object class="NSButtonImageSource" key="NSAlternateImage" id="927696320">
 									<string key="NSImageName">NSSwitch</string>
 								</object>
 								<string key="NSAlternateContents"/>
@@ -1548,8 +1548,30 @@
 								<int key="NSPeriodicInterval">25</int>
 							</object>
 						</object>
+						<object class="NSButton" id="894512510">
+							<reference key="NSNextResponder" ref="439893737"/>
+							<int key="NSvFlags">289</int>
+							<string key="NSFrame">{{195, 25}, {194, 18}}</string>
+							<reference key="NSSuperview" ref="439893737"/>
+							<bool key="NSEnabled">YES</bool>
+							<object class="NSButtonCell" key="NSCell" id="442291954">
+								<int key="NSCellFlags">-2080244224</int>
+								<int key="NSCellFlags2">0</int>
+								<string key="NSContents">Skip Transparent Tiles</string>
+								<reference key="NSSupport" ref="101756130"/>
+								<reference key="NSControlView" ref="894512510"/>
+								<int key="NSButtonFlags">1211912703</int>
+								<int key="NSButtonFlags2">2</int>
+								<reference key="NSNormalImage" ref="1037310102"/>
+								<reference key="NSAlternateImage" ref="927696320"/>
+								<string key="NSAlternateContents"/>
+								<string key="NSKeyEquivalent"/>
+								<int key="NSPeriodicDelay">200</int>
+								<int key="NSPeriodicInterval">25</int>
+							</object>
+						</object>
 					</object>
-					<string key="NSFrameSize">{524, 431}</string>
+					<string key="NSFrameSize">{524, 456}</string>
 					<reference key="NSSuperview"/>
 				</object>
 				<string key="NSScreenRect">{{0, 0}, {1920, 1058}}</string>
@@ -1561,6 +1583,10 @@
 				<string key="NSClassName">NSFontManager</string>
 			</object>
 			<object class="NSUserDefaultsController" id="706982641">
+				<object class="NSMutableArray" key="NSDeclaredKeys">
+					<bool key="EncodedWithXMLCoder">YES</bool>
+					<string>skipTransparentTiles</string>
+				</object>
 				<bool key="NSSharedInstance">YES</bool>
 			</object>
 			<object class="NSWindowTemplate" id="730553912">
@@ -2683,6 +2709,38 @@ AAMAAAABAAEAAAFTAAMAAAAEAAAFwgAAAAAACAAIAAgACAABAAEAAQABA</bytes>
 					</object>
 					<int key="connectionID">647</int>
 				</object>
+				<object class="IBConnectionRecord">
+					<object class="IBActionConnection" key="connection">
+						<string key="label">valueChanged:</string>
+						<reference key="source" ref="610493837"/>
+						<reference key="destination" ref="894512510"/>
+					</object>
+					<int key="connectionID">654</int>
+				</object>
+				<object class="IBConnectionRecord">
+					<object class="IBBindingConnection" key="connection">
+						<string key="label">value: values.skipTransparentTiles</string>
+						<reference key="source" ref="894512510"/>
+						<reference key="destination" ref="706982641"/>
+						<object class="NSNibBindingConnector" key="connector">
+							<reference key="NSSource" ref="894512510"/>
+							<reference key="NSDestination" ref="706982641"/>
+							<string key="NSLabel">value: values.skipTransparentTiles</string>
+							<string key="NSBinding">value</string>
+							<string key="NSKeyPath">values.skipTransparentTiles</string>
+							<int key="NSNibBindingConnectorVersion">2</int>
+						</object>
+					</object>
+					<int key="connectionID">656</int>
+				</object>
+				<object class="IBConnectionRecord">
+					<object class="IBOutletConnection" key="connection">
+						<string key="label">skipCheckbox</string>
+						<reference key="source" ref="610493837"/>
+						<reference key="destination" ref="894512510"/>
+					</object>
+					<int key="connectionID">657</int>
+				</object>
 			</object>
 			<object class="IBMutableOrderedSet" key="objectRecords">
 				<object class="NSArray" key="orderedObjects">
@@ -3175,6 +3233,7 @@ AAMAAAABAAEAAAFTAAMAAAAEAAAFwgAAAAAACAAIAAgACAABAAEAAQABA</bytes>
 							<reference ref="362709764"/>
 							<reference ref="388782215"/>
 							<reference ref="610493837"/>
+							<reference ref="894512510"/>
 						</object>
 						<reference key="parent" ref="972006081"/>
 					</object>
@@ -3906,6 +3965,20 @@ AAMAAAABAAEAAAFTAAMAAAAEAAAFwgAAAAAACAAIAAgACAABAAEAAQABA</bytes>
 						<reference key="object" ref="1024496921"/>
 						<reference key="parent" ref="499565204"/>
 					</object>
+					<object class="IBObjectRecord">
+						<int key="objectID">652</int>
+						<reference key="object" ref="894512510"/>
+						<object class="NSMutableArray" key="children">
+							<bool key="EncodedWithXMLCoder">YES</bool>
+							<reference ref="442291954"/>
+						</object>
+						<reference key="parent" ref="439893737"/>
+					</object>
+					<object class="IBObjectRecord">
+						<int key="objectID">653</int>
+						<reference key="object" ref="442291954"/>
+						<reference key="parent" ref="894512510"/>
+					</object>
 				</object>
 			</object>
 			<object class="NSMutableDictionary" key="flattenedProperties">
@@ -4178,6 +4251,9 @@ AAMAAAABAAEAAAFTAAMAAAAEAAAFwgAAAAAACAAIAAgACAABAAEAAQABA</bytes>
 					<string>610.IBPluginDependency</string>
 					<string>612.IBPluginDependency</string>
 					<string>639.IBViewBoundsToFrameTransform</string>
+					<string>652.IBPluginDependency</string>
+					<string>652.IBViewBoundsToFrameTransform</string>
+					<string>653.IBPluginDependency</string>
 					<string>72.IBPluginDependency</string>
 					<string>72.ImportedFromIB2</string>
 					<string>79.IBPluginDependency</string>
@@ -4290,7 +4366,7 @@ AAMAAAABAAEAAAFTAAMAAAAEAAAFwgAAAAAACAAIAAgACAABAAEAAQABA</bytes>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<integer value="1"/>
 					<string>{{525, 802}, {197, 73}}</string>
-					<string>{{194, 943}, {441, 20}}</string>
+					<string>{{839, 736}, {441, 20}}</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<integer value="1"/>
 					<string>{74, 862}</string>
@@ -4315,10 +4391,10 @@ AAMAAAABAAEAAAFTAAMAAAAEAAAFwgAAAAAACAAIAAgACAABAAEAAQABA</bytes>
 					<integer value="1"/>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
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-					<string>{{753, 18}, {524, 431}}</string>
+					<string>{{420, -31}, {524, 456}}</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<boolean value="YES"/>
-					<string>{{753, 18}, {524, 431}}</string>
+					<string>{{420, -31}, {524, 456}}</string>
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@@ -4450,31 +4526,31 @@ AAMAAAABAAEAAAFTAAMAAAAEAAAFwgAAAAAACAAIAAgACAABAAEAAQABA</bytes>
 					<integer value="1"/>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<object class="NSAffineTransform">
-						<bytes key="NSTransformStruct">P4AAAL+AAABDEAAAwbAAAA</bytes>
+						<bytes key="NSTransformStruct">P4AAAL+AAABDQwAAwnQAAA</bytes>
 					</object>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
-					<string>{{206, 760}, {207, 183}}</string>
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 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
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 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<boolean value="YES"/>
-					<string>{{588, 803}, {456, 105}}</string>
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 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
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 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
-					<string>{{201, 522}, {310, 176}}</string>
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 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
-					<string>{{201, 522}, {310, 176}}</string>
+					<string>{{329, 522}, {310, 176}}</string>
 					<boolean value="NO"/>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<object class="NSAffineTransform">
-						<bytes key="NSTransformStruct">P4AAAL+AAABBkAAAwuAAAA</bytes>
+						<bytes key="NSTransformStruct">P4AAAL+AAABB0AAAwuAAAA</bytes>
 					</object>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
@@ -4482,6 +4558,11 @@ AAMAAAABAAEAAAFTAAMAAAAEAAAFwgAAAAAACAAIAAgACAABAAEAAQABA</bytes>
 						<bytes key="NSTransformStruct">AUHIAABB0AAAA</bytes>
 					</object>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+					<object class="NSAffineTransform">
+						<bytes key="NSTransformStruct">P4AAAL+AAABDEAAAwbAAAA</bytes>
+					</object>
+					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<integer value="1"/>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
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@@ -4513,7 +4594,7 @@ AAMAAAABAAEAAAFTAAMAAAAEAAAFwgAAAAAACAAIAAgACAABAAEAAQABA</bytes>
 				</object>
 			</object>
 			<nil key="sourceID"/>
-			<int key="maxID">647</int>
+			<int key="maxID">657</int>
 		</object>
 		<object class="IBClassDescriber" key="IBDocument.Classes">
 			<object class="NSMutableArray" key="referencedPartialClassDescriptions">
@@ -4539,6 +4620,7 @@ AAMAAAABAAEAAAFTAAMAAAAEAAAFwgAAAAAACAAIAAgACAABAAEAAQABA</bytes>
 							<string>guideCheckbox</string>
 							<string>guideColorWell</string>
 							<string>saveButton</string>
+							<string>skipCheckbox</string>
 							<string>tileHeightField</string>
 							<string>tileWidthField</string>
 						</object>
@@ -4547,6 +4629,7 @@ AAMAAAABAAEAAAFTAAMAAAAEAAAFwgAAAAAACAAIAAgACAABAAEAAQABA</bytes>
 							<string>NSButton</string>
 							<string>NSColorWell</string>
 							<string>NSButton</string>
+							<string>NSButton</string>
 							<string>NSTextField</string>
 							<string>NSTextField</string>
 						</object>
@@ -4558,6 +4641,7 @@ AAMAAAABAAEAAAFTAAMAAAAEAAAFwgAAAAAACAAIAAgACAABAAEAAQABA</bytes>
 							<string>guideCheckbox</string>
 							<string>guideColorWell</string>
 							<string>saveButton</string>
+							<string>skipCheckbox</string>
 							<string>tileHeightField</string>
 							<string>tileWidthField</string>
 						</object>
@@ -4575,6 +4659,10 @@ AAMAAAABAAEAAAFTAAMAAAAEAAAFwgAAAAAACAAIAAgACAABAAEAAQABA</bytes>
 								<string key="name">saveButton</string>
 								<string key="candidateClassName">NSButton</string>
 							</object>
+							<object class="IBToOneOutletInfo">
+								<string key="name">skipCheckbox</string>
+								<string key="candidateClassName">NSButton</string>
+							</object>
 							<object class="IBToOneOutletInfo">
 								<string key="name">tileHeightField</string>
 								<string key="candidateClassName">NSTextField</string>
@@ -4712,6 +4800,572 @@ AAMAAAABAAEAAAFTAAMAAAAEAAAFwgAAAAAACAAIAAgACAABAAEAAQABA</bytes>
 					</object>
 				</object>
 			</object>
+			<object class="NSMutableArray" key="referencedPartialClassDescriptionsV3.2+">
+				<bool key="EncodedWithXMLCoder">YES</bool>
+				<object class="IBPartialClassDescription">
+					<string key="className">NSActionCell</string>
+					<string key="superclassName">NSCell</string>
+					<object class="IBClassDescriptionSource" key="sourceIdentifier">
+						<string key="majorKey">IBFrameworkSource</string>
+						<string key="minorKey">AppKit.framework/Headers/NSActionCell.h</string>
+					</object>
+				</object>
+				<object class="IBPartialClassDescription">
+					<string key="className">NSApplication</string>
+					<string key="superclassName">NSResponder</string>
+					<object class="IBClassDescriptionSource" key="sourceIdentifier" id="1066391182">
+						<string key="majorKey">IBFrameworkSource</string>
+						<string key="minorKey">AppKit.framework/Headers/NSApplication.h</string>
+					</object>
+				</object>
+				<object class="IBPartialClassDescription">
+					<string key="className">NSApplication</string>
+					<object class="IBClassDescriptionSource" key="sourceIdentifier" id="944523351">
+						<string key="majorKey">IBFrameworkSource</string>
+						<string key="minorKey">AppKit.framework/Headers/NSApplicationScripting.h</string>
+					</object>
+				</object>
+				<object class="IBPartialClassDescription">
+					<string key="className">NSApplication</string>
+					<object class="IBClassDescriptionSource" key="sourceIdentifier" id="120470937">
+						<string key="majorKey">IBFrameworkSource</string>
+						<string key="minorKey">AppKit.framework/Headers/NSColorPanel.h</string>
+					</object>
+				</object>
+				<object class="IBPartialClassDescription">
+					<string key="className">NSApplication</string>
+					<object class="IBClassDescriptionSource" key="sourceIdentifier">
+						<string key="majorKey">IBFrameworkSource</string>
+						<string key="minorKey">AppKit.framework/Headers/NSHelpManager.h</string>
+					</object>
+				</object>
+				<object class="IBPartialClassDescription">
+					<string key="className">NSApplication</string>
+					<object class="IBClassDescriptionSource" key="sourceIdentifier">
+						<string key="majorKey">IBFrameworkSource</string>
+						<string key="minorKey">AppKit.framework/Headers/NSPageLayout.h</string>
+					</object>
+				</object>
+				<object class="IBPartialClassDescription">
+					<string key="className">NSApplication</string>
+					<object class="IBClassDescriptionSource" key="sourceIdentifier">
+						<string key="majorKey">IBFrameworkSource</string>
+						<string key="minorKey">AppKit.framework/Headers/NSUserInterfaceItemSearching.h</string>
+					</object>
+				</object>
+				<object class="IBPartialClassDescription">
+					<string key="className">NSBox</string>
+					<string key="superclassName">NSView</string>
+					<object class="IBClassDescriptionSource" key="sourceIdentifier">
+						<string key="majorKey">IBFrameworkSource</string>
+						<string key="minorKey">AppKit.framework/Headers/NSBox.h</string>
+					</object>
+				</object>
+				<object class="IBPartialClassDescription">
+					<string key="className">NSBrowser</string>
+					<string key="superclassName">NSControl</string>
+					<object class="IBClassDescriptionSource" key="sourceIdentifier">
+						<string key="majorKey">IBFrameworkSource</string>
+						<string key="minorKey">AppKit.framework/Headers/NSBrowser.h</string>
+					</object>
+				</object>
+				<object class="IBPartialClassDescription">
+					<string key="className">NSButton</string>
+					<string key="superclassName">NSControl</string>
+					<object class="IBClassDescriptionSource" key="sourceIdentifier">
+						<string key="majorKey">IBFrameworkSource</string>
+						<string key="minorKey">AppKit.framework/Headers/NSButton.h</string>
+					</object>
+				</object>
+				<object class="IBPartialClassDescription">
+					<string key="className">NSButtonCell</string>
+					<string key="superclassName">NSActionCell</string>
+					<object class="IBClassDescriptionSource" key="sourceIdentifier">
+						<string key="majorKey">IBFrameworkSource</string>
+						<string key="minorKey">AppKit.framework/Headers/NSButtonCell.h</string>
+					</object>
+				</object>
+				<object class="IBPartialClassDescription">
+					<string key="className">NSCell</string>
+					<string key="superclassName">NSObject</string>
+					<object class="IBClassDescriptionSource" key="sourceIdentifier">
+						<string key="majorKey">IBFrameworkSource</string>
+						<string key="minorKey">AppKit.framework/Headers/NSCell.h</string>
+					</object>
+				</object>
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+					<string key="className">NSWindow</string>
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diff --git a/NSBitmapImageRep-Tile.h b/NSBitmapImageRep-Tile.h
index 46384bf..47d9f05 100644
--- a/NSBitmapImageRep-Tile.h
+++ b/NSBitmapImageRep-Tile.h
@@ -10,7 +10,33 @@
 
 
 @interface NSBitmapImageRep(Tile)
--(NSImage *)subImageWithTileWidth:(CGFloat)tileWidth tileHeight:(CGFloat)tileHeight column:(NSUInteger)column row:(NSUInteger)row;
+
+-(NSImage *)subImageWithTileWidth:(CGFloat)tileWidth 
+					   tileHeight:(CGFloat)tileHeight 
+						   column:(NSUInteger)column 
+							  row:(NSUInteger)row;
+
+// Same as previous, but if rigid = YES - adds black pixels to fill 
+// all tileWidthxtileHeight zone, if there's no enough pixels in image
+-(NSImage *)subImageWithTileWidth:(CGFloat)tileWidth 
+					   tileHeight:(CGFloat)tileHeight 
+						   column:(NSUInteger)column 
+							  row:(NSUInteger)row
+						rigidSize:(BOOL) rigid;
+
+/** Designated method.
+ *
+ * @param potSize If YES - tile width & height will be rounded to nearest POT value, larger then existing. 
+ * potSize have no effect if rigidSize is YES.
+ *
+ */
+-(NSImage *)subImageWithTileWidth:(CGFloat)tileWidth 
+					   tileHeight:(CGFloat)tileHeight 
+						   column:(NSUInteger)column 
+							  row:(NSUInteger)row
+						rigidSize:(BOOL) rigid
+						  POTSize:(BOOL) potSize;
+
 -(NSUInteger)columnsWithTileWidth:(CGFloat)tileWidth;
 -(NSUInteger)rowsWithTileHeight:(CGFloat)tileHeight;
 
diff --git a/NSBitmapImageRep-Tile.m b/NSBitmapImageRep-Tile.m
index 11fc530..3406d19 100644
--- a/NSBitmapImageRep-Tile.m
+++ b/NSBitmapImageRep-Tile.m
@@ -10,7 +10,29 @@
 
 
 @implementation NSBitmapImageRep(Tile)
--(NSImage *)subImageWithTileWidth:(CGFloat)tileWidth tileHeight:(CGFloat)tileHeight column:(NSUInteger)column row:(NSUInteger)row
+-(NSImage *)subImageWithTileWidth:(CGFloat)tileWidth 
+					   tileHeight:(CGFloat)tileHeight 
+						   column:(NSUInteger)column 
+							  row:(NSUInteger)row
+{
+	return [self subImageWithTileWidth:tileWidth tileHeight:tileHeight column: column row:row rigidSize: NO POTSize: NO];
+}
+
+-(NSImage *)subImageWithTileWidth:(CGFloat)tileWidth 
+					   tileHeight:(CGFloat)tileHeight 
+						   column:(NSUInteger)column 
+							  row:(NSUInteger)row
+						rigidSize:(BOOL) rigid
+{
+	return [self subImageWithTileWidth:tileWidth tileHeight:tileHeight column: column row:row rigidSize: NO POTSize: NO];
+}
+
+-(NSImage *)subImageWithTileWidth:(CGFloat)tileWidth 
+					   tileHeight:(CGFloat)tileHeight 
+						   column:(NSUInteger)column 
+							  row:(NSUInteger)row
+						rigidSize:(BOOL) rigid
+						  POTSize:(BOOL) potSize
 {
     int width = [self pixelsWide];
     int height = [self pixelsHigh];
@@ -25,10 +47,13 @@ -(NSImage *)subImageWithTileWidth:(CGFloat)tileWidth tileHeight:(CGFloat)tileHei
     int lastCol;
     int outputWidth;
     
-    if (theCol + tileWidth > width) // last column, not full size
+    if ( !rigid && (theCol + tileWidth > width) ) // last column, not full size
     {
         lastCol = width;
         outputWidth = (width - theCol);
+		
+		if (potSize)
+			outputWidth = (int)pow( 2, ceil(log2((double)outputWidth)));
     }
     else
     {
@@ -37,11 +62,13 @@ -(NSImage *)subImageWithTileWidth:(CGFloat)tileWidth tileHeight:(CGFloat)tileHei
     }
     
     int lastRow, outputHeight;
-    if (theRow + tileHeight > height)
+    if ( !rigid && (theRow + tileHeight > height) )
     {
         lastRow = height;
         outputHeight = (height - theRow);
-        
+		
+		if (potSize)
+			outputHeight = (int)pow( 2, ceil(log2((double)outputHeight)));        
     }
     else
     {
@@ -74,8 +101,19 @@ -(NSImage *)subImageWithTileWidth:(CGFloat)tileWidth tileHeight:(CGFloat)tileHei
         {
             p1 = srcData + bytesPerPixel * (y * width + x);
             p2 = destData + bytesPerPixel * ((y - theRow) * width + (x - theCol));
-            for (i = 0; i < bytesPerPixel; i++)
-                p2[i] = p1[i];
+            
+			if ( x >= width || y >= height)
+			{
+				// fill with zeroes pixels outside self.size
+				for (i = 0; i < bytesPerPixel; i++)
+					p2[i] = 0;
+			}
+			else
+			{
+				// copy pixels as usual
+				for (i = 0; i < bytesPerPixel; i++)
+					p2[i] = p1[i];
+			}
         }
     }
     
diff --git a/README b/README
deleted file mode 100644
index 4814bf5..0000000
--- a/README
+++ /dev/null
@@ -1 +0,0 @@
-Tile Cutter is an open source under the non-viral MIT license. Tile Cutter will take a large image and split it up into smaller tiles. I created this for use in a CATiledLayer-backed view for an iPad application, but it could be used for a number of other purposes.
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..3512fb9
--- /dev/null
+++ b/README.md
@@ -0,0 +1,28 @@
+Tile-Cutter (by Jeff LaMarche)
+=================
+
+Tile Cutter is an open source under the non-viral MIT license.    
+Tile Cutter will take a large image and split it up into smaller tiles. I created this for use in a CATiledLayer-backed view for an iPad application, but it could be used for a number of other purposes.
+
+
+This Fork (by Stepan Generalov)
+================
+
+In this fork of Tile Cutter there was added some things:
+
+1. Plist file, that have info about tiles position and source image size.
+2. Skipping of absolutely transparent tiles
+3. Command Line Tool
+4. Rigid Tile Size (can be useful if you need fixed tile size, even if image don't fit)
+
+
+There's some minor issues in this fork, that i probably will not fix, cause everything is working fine for me now:
+
+1. You can't choose other than PNG file type in commandLine tool.
+2. You can't set suffix in GUI.
+3. There's no progressBar in commandLine tool. Here's a link, that maybe can help you with implementing non-duplicating progress bar: http://en.wikipedia.org/wiki/ANSI_escape_code
+4. rigidTilesSize option is available only in commandLine tool. (It allows you to have all tiles with equal size with black pixels that is out of image area)
+
+If you're using Tile-Cutter and experiencing some issues - feel free to open new Issues or Pull Requests in this Repo.
+
+
diff --git a/Tile Cutter.xcodeproj/project.pbxproj b/Tile Cutter.xcodeproj/project.pbxproj
index e1c5075..98fe7c9 100644
--- a/Tile Cutter.xcodeproj/project.pbxproj	
+++ b/Tile Cutter.xcodeproj/project.pbxproj	
@@ -6,6 +6,21 @@
 	objectVersion = 45;
 	objects = {
 
+/* Begin PBXAggregateTarget section */
+		6DA78D271369F7D9000EA884 /* Build All Targets */ = {
+			isa = PBXAggregateTarget;
+			buildConfigurationList = 6DA78D3E1369F7FE000EA884 /* Build configuration list for PBXAggregateTarget "Build All Targets" */;
+			buildPhases = (
+			);
+			dependencies = (
+				6DA78D2B1369F7E0000EA884 /* PBXTargetDependency */,
+				6DA78D2D1369F7E0000EA884 /* PBXTargetDependency */,
+			);
+			name = "Build All Targets";
+			productName = "Build All Targets";
+		};
+/* End PBXAggregateTarget section */
+
 /* Begin PBXBuildFile section */
 		1DDD58160DA1D0A300B32029 /* MainMenu.xib in Resources */ = {isa = PBXBuildFile; fileRef = 1DDD58140DA1D0A300B32029 /* MainMenu.xib */; };
 		1F15EAF9125E8ED200B32D97 /* NSImage-Tile.m in Sources */ = {isa = PBXBuildFile; fileRef = 1F15EA19125E826600B32D97 /* NSImage-Tile.m */; };
@@ -17,11 +32,35 @@
 		1FFB9979127C874900BE5A73 /* NSInvocation-MCUtilities.m in Sources */ = {isa = PBXBuildFile; fileRef = 1FFB9978127C874900BE5A73 /* NSInvocation-MCUtilities.m */; };
 		1FFB9A18127CAD9F00BE5A73 /* NSBitmapImageRep-Tile.m in Sources */ = {isa = PBXBuildFile; fileRef = 1FFB9A17127CAD9F00BE5A73 /* NSBitmapImageRep-Tile.m */; };
 		256AC3DA0F4B6AC300CF3369 /* Tile_CutterAppDelegate.m in Sources */ = {isa = PBXBuildFile; fileRef = 256AC3D90F4B6AC300CF3369 /* Tile_CutterAppDelegate.m */; };
+		6DA78C0D1369BEE1000EA884 /* cmdToolMain.m in Sources */ = {isa = PBXBuildFile; fileRef = 6DA78C0C1369BEE1000EA884 /* cmdToolMain.m */; };
+		6DA78C441369C5FE000EA884 /* TileCutterCore.m in Sources */ = {isa = PBXBuildFile; fileRef = 6DA78C421369C5FE000EA884 /* TileCutterCore.m */; };
+		6DA78CD11369E71D000EA884 /* NSInvocation-MCUtilities.m in Sources */ = {isa = PBXBuildFile; fileRef = 1FFB9978127C874900BE5A73 /* NSInvocation-MCUtilities.m */; };
+		6DA78CD21369E71D000EA884 /* NSImage-Tile.m in Sources */ = {isa = PBXBuildFile; fileRef = 1F15EA19125E826600B32D97 /* NSImage-Tile.m */; };
+		6DA78CD41369E71D000EA884 /* NSBitmapImageRep-Tile.m in Sources */ = {isa = PBXBuildFile; fileRef = 1FFB9A17127CAD9F00BE5A73 /* NSBitmapImageRep-Tile.m */; };
+		6DA78CD51369E71D000EA884 /* TileCutterCore.m in Sources */ = {isa = PBXBuildFile; fileRef = 6DA78C421369C5FE000EA884 /* TileCutterCore.m */; };
+		6DA78CE11369E737000EA884 /* TileOperation.m in Sources */ = {isa = PBXBuildFile; fileRef = 1FFB9940127C847100BE5A73 /* TileOperation.m */; };
 		8D11072B0486CEB800E47090 /* InfoPlist.strings in Resources */ = {isa = PBXBuildFile; fileRef = 089C165CFE840E0CC02AAC07 /* InfoPlist.strings */; };
 		8D11072D0486CEB800E47090 /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = 29B97316FDCFA39411CA2CEA /* main.m */; settings = {ATTRIBUTES = (); }; };
 		8D11072F0486CEB800E47090 /* Cocoa.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 1058C7A1FEA54F0111CA2CBB /* Cocoa.framework */; };
 /* End PBXBuildFile section */
 
+/* Begin PBXContainerItemProxy section */
+		6DA78D2A1369F7E0000EA884 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 29B97313FDCFA39411CA2CEA /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 8D1107260486CEB800E47090;
+			remoteInfo = "Tile Cutter";
+		};
+		6DA78D2C1369F7E0000EA884 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 29B97313FDCFA39411CA2CEA /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 6DA78C061369BEB0000EA884;
+			remoteInfo = tileCutter;
+		};
+/* End PBXContainerItemProxy section */
+
 /* Begin PBXFileReference section */
 		089C165DFE840E0CC02AAC07 /* English */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.strings; name = English; path = English.lproj/InfoPlist.strings; sourceTree = "<group>"; };
 		1058C7A1FEA54F0111CA2CBB /* Cocoa.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Cocoa.framework; path = /System/Library/Frameworks/Cocoa.framework; sourceTree = "<absolute>"; };
@@ -47,11 +86,23 @@
 		29B97316FDCFA39411CA2CEA /* main.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = main.m; sourceTree = "<group>"; };
 		29B97324FDCFA39411CA2CEA /* AppKit.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = AppKit.framework; path = /System/Library/Frameworks/AppKit.framework; sourceTree = "<absolute>"; };
 		29B97325FDCFA39411CA2CEA /* Foundation.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Foundation.framework; path = /System/Library/Frameworks/Foundation.framework; sourceTree = "<absolute>"; };
+		6DA78C071369BEB0000EA884 /* tileCutter */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = tileCutter; sourceTree = BUILT_PRODUCTS_DIR; };
+		6DA78C0C1369BEE1000EA884 /* cmdToolMain.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = cmdToolMain.m; sourceTree = "<group>"; };
+		6DA78C411369C5FE000EA884 /* TileCutterCore.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = TileCutterCore.h; sourceTree = "<group>"; };
+		6DA78C421369C5FE000EA884 /* TileCutterCore.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = TileCutterCore.m; sourceTree = "<group>"; };
+		6DA78CB51369E61A000EA884 /* TileCutterSettings.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = TileCutterSettings.h; sourceTree = "<group>"; };
 		8D1107310486CEB800E47090 /* Tile_Cutter-Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; path = "Tile_Cutter-Info.plist"; sourceTree = "<group>"; };
 		8D1107320486CEB800E47090 /* Tile Cutter.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = "Tile Cutter.app"; sourceTree = BUILT_PRODUCTS_DIR; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
+		6DA78C051369BEB0000EA884 /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		8D11072E0486CEB800E47090 /* Frameworks */ = {
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
@@ -66,6 +117,7 @@
 		080E96DDFE201D6D7F000001 /* Classes */ = {
 			isa = PBXGroup;
 			children = (
+				6DA78CB51369E61A000EA884 /* TileCutterSettings.h */,
 				1FFB9977127C874900BE5A73 /* NSInvocation-MCUtilities.h */,
 				1FFB9978127C874900BE5A73 /* NSInvocation-MCUtilities.m */,
 				256AC3D80F4B6AC300CF3369 /* Tile_CutterAppDelegate.h */,
@@ -80,6 +132,8 @@
 				1FFB9940127C847100BE5A73 /* TileOperation.m */,
 				1FFB9A16127CAD9F00BE5A73 /* NSBitmapImageRep-Tile.h */,
 				1FFB9A17127CAD9F00BE5A73 /* NSBitmapImageRep-Tile.m */,
+				6DA78C411369C5FE000EA884 /* TileCutterCore.h */,
+				6DA78C421369C5FE000EA884 /* TileCutterCore.m */,
 			);
 			name = Classes;
 			sourceTree = "<group>";
@@ -106,6 +160,7 @@
 			isa = PBXGroup;
 			children = (
 				8D1107320486CEB800E47090 /* Tile Cutter.app */,
+				6DA78C071369BEB0000EA884 /* tileCutter */,
 			);
 			name = Products;
 			sourceTree = "<group>";
@@ -127,6 +182,7 @@
 			children = (
 				256AC3F00F4B6AF500CF3369 /* Tile_Cutter_Prefix.pch */,
 				29B97316FDCFA39411CA2CEA /* main.m */,
+				6DA78C0C1369BEE1000EA884 /* cmdToolMain.m */,
 			);
 			name = "Other Sources";
 			sourceTree = "<group>";
@@ -155,6 +211,22 @@
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
+		6DA78C061369BEB0000EA884 /* tileCutter */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = 6DA78C0B1369BECE000EA884 /* Build configuration list for PBXNativeTarget "tileCutter" */;
+			buildPhases = (
+				6DA78C041369BEB0000EA884 /* Sources */,
+				6DA78C051369BEB0000EA884 /* Frameworks */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = tileCutter;
+			productName = tileCutter;
+			productReference = 6DA78C071369BEB0000EA884 /* tileCutter */;
+			productType = "com.apple.product-type.tool";
+		};
 		8D1107260486CEB800E47090 /* Tile Cutter */ = {
 			isa = PBXNativeTarget;
 			buildConfigurationList = C01FCF4A08A954540054247B /* Build configuration list for PBXNativeTarget "Tile Cutter" */;
@@ -193,6 +265,8 @@
 			projectRoot = "";
 			targets = (
 				8D1107260486CEB800E47090 /* Tile Cutter */,
+				6DA78C061369BEB0000EA884 /* tileCutter */,
+				6DA78D271369F7D9000EA884 /* Build All Targets */,
 			);
 		};
 /* End PBXProject section */
@@ -212,6 +286,19 @@
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
+		6DA78C041369BEB0000EA884 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				6DA78C0D1369BEE1000EA884 /* cmdToolMain.m in Sources */,
+				6DA78CD11369E71D000EA884 /* NSInvocation-MCUtilities.m in Sources */,
+				6DA78CD21369E71D000EA884 /* NSImage-Tile.m in Sources */,
+				6DA78CD41369E71D000EA884 /* NSBitmapImageRep-Tile.m in Sources */,
+				6DA78CD51369E71D000EA884 /* TileCutterCore.m in Sources */,
+				6DA78CE11369E737000EA884 /* TileOperation.m in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		8D11072C0486CEB800E47090 /* Sources */ = {
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
@@ -224,11 +311,25 @@
 				1FFB9941127C847100BE5A73 /* TileOperation.m in Sources */,
 				1FFB9979127C874900BE5A73 /* NSInvocation-MCUtilities.m in Sources */,
 				1FFB9A18127CAD9F00BE5A73 /* NSBitmapImageRep-Tile.m in Sources */,
+				6DA78C441369C5FE000EA884 /* TileCutterCore.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
 /* End PBXSourcesBuildPhase section */
 
+/* Begin PBXTargetDependency section */
+		6DA78D2B1369F7E0000EA884 /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = 8D1107260486CEB800E47090 /* Tile Cutter */;
+			targetProxy = 6DA78D2A1369F7E0000EA884 /* PBXContainerItemProxy */;
+		};
+		6DA78D2D1369F7E0000EA884 /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = 6DA78C061369BEB0000EA884 /* tileCutter */;
+			targetProxy = 6DA78D2C1369F7E0000EA884 /* PBXContainerItemProxy */;
+		};
+/* End PBXTargetDependency section */
+
 /* Begin PBXVariantGroup section */
 		089C165CFE840E0CC02AAC07 /* InfoPlist.strings */ = {
 			isa = PBXVariantGroup;
@@ -249,6 +350,73 @@
 /* End PBXVariantGroup section */
 
 /* Begin XCBuildConfiguration section */
+		6DA78C091369BEB0000EA884 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				COPY_PHASE_STRIP = NO;
+				GCC_DYNAMIC_NO_PIC = NO;
+				GCC_ENABLE_FIX_AND_CONTINUE = YES;
+				GCC_MODEL_TUNING = G5;
+				GCC_OPTIMIZATION_LEVEL = 0;
+				GCC_PRECOMPILE_PREFIX_HEADER = YES;
+				GCC_PREFIX_HEADER = "$(SYSTEM_LIBRARY_DIR)/Frameworks/AppKit.framework/Headers/AppKit.h";
+				INSTALL_PATH = /usr/local/bin;
+				OTHER_LDFLAGS = (
+					"-framework",
+					Foundation,
+					"-framework",
+					AppKit,
+				);
+				PREBINDING = NO;
+				PRODUCT_NAME = tileCutter;
+			};
+			name = Debug;
+		};
+		6DA78C0A1369BEB0000EA884 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				COPY_PHASE_STRIP = YES;
+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				GCC_ENABLE_FIX_AND_CONTINUE = NO;
+				GCC_MODEL_TUNING = G5;
+				GCC_PRECOMPILE_PREFIX_HEADER = YES;
+				GCC_PREFIX_HEADER = "$(SYSTEM_LIBRARY_DIR)/Frameworks/AppKit.framework/Headers/AppKit.h";
+				INSTALL_PATH = /usr/local/bin;
+				OTHER_LDFLAGS = (
+					"-framework",
+					Foundation,
+					"-framework",
+					AppKit,
+				);
+				PREBINDING = NO;
+				PRODUCT_NAME = tileCutter;
+				ZERO_LINK = NO;
+			};
+			name = Release;
+		};
+		6DA78D281369F7DA000EA884 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				COPY_PHASE_STRIP = NO;
+				GCC_DYNAMIC_NO_PIC = NO;
+				GCC_OPTIMIZATION_LEVEL = 0;
+				PRODUCT_NAME = "Build All Targets";
+			};
+			name = Debug;
+		};
+		6DA78D291369F7DA000EA884 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				COPY_PHASE_STRIP = YES;
+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				GCC_ENABLE_FIX_AND_CONTINUE = NO;
+				PRODUCT_NAME = "Build All Targets";
+				ZERO_LINK = NO;
+			};
+			name = Release;
+		};
 		C01FCF4B08A954540054247B /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
@@ -326,6 +494,24 @@
 /* End XCBuildConfiguration section */
 
 /* Begin XCConfigurationList section */
+		6DA78C0B1369BECE000EA884 /* Build configuration list for PBXNativeTarget "tileCutter" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				6DA78C091369BEB0000EA884 /* Debug */,
+				6DA78C0A1369BEB0000EA884 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		6DA78D3E1369F7FE000EA884 /* Build configuration list for PBXAggregateTarget "Build All Targets" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				6DA78D281369F7DA000EA884 /* Debug */,
+				6DA78D291369F7DA000EA884 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
 		C01FCF4A08A954540054247B /* Build configuration list for PBXNativeTarget "Tile Cutter" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (
diff --git a/TileCutterCore.h b/TileCutterCore.h
new file mode 100644
index 0000000..0072b86
--- /dev/null
+++ b/TileCutterCore.h
@@ -0,0 +1,52 @@
+//
+//  TileCutterCore.h
+//  Tile Cutter
+//
+//  Created by Stepan Generalov on 28.04.11.
+//  Copyright 2011 __MyCompanyName__. All rights reserved.
+//
+
+#import <Cocoa/Cocoa.h>
+#import "TileOperation.h"
+
+
+@interface TileCutterCore : NSObject  <TileOperationDelegate>
+{}
+
+#pragma mark  Public Properties
+
+// Properties of Tiling Operation
+@property(readwrite) BOOL POTTiles;
+@property(readwrite) BOOL rigidTiles;
+@property(readwrite) BOOL keepAllTiles;
+@property(readwrite) NSUInteger tileWidth;
+@property(readwrite) NSUInteger tileHeight;
+@property(readwrite) float_t contentScaleFactor;
+@property(readwrite) TileCutterOutputPrefs outputFormat;
+@property(readwrite, copy) NSString *inputFilename;
+@property(readwrite, copy) NSString *outputBaseFilename;
+@property(readwrite, copy) NSString *outputSuffix;
+
+// Properties of Global Tiling Operation Status
+@property(readwrite) int tileRowCount;
+@property(readwrite) int tileColCount;
+@property(readwrite) int progressCol;
+@property(readwrite) int progressRow;
+
+// TileOperationDelegate messages will be forwarded after processing to this delegate
+@property(readwrite, assign) NSObject<TileOperationDelegate> *operationsDelegate;
+
+#pragma mark Public Methods
+
+- (void) startSavingTiles;
+
+#pragma mark Private  Properties
+
+// Queue of Operations - used internally
+@property(nonatomic, retain) NSOperationQueue *queue;
+
+// Info, prepared for output.plist - used internally
+@property(readwrite, retain) NSArray *allTilesInfo;
+@property(readwrite, retain) NSDictionary *imageInfo;
+
+@end
diff --git a/TileCutterCore.m b/TileCutterCore.m
new file mode 100644
index 0000000..748c8c0
--- /dev/null
+++ b/TileCutterCore.m
@@ -0,0 +1,188 @@
+//
+//  TileCutterCore.m
+//  Tile Cutter
+//
+//  Created by Stepan Generalov on 28.04.11.
+//  Copyright 2011 __MyCompanyName__. All rights reserved.
+//
+
+#import "TileCutterCore.h"
+#import "NSImage-Tile.h"
+
+@implementation TileCutterCore
+
+@synthesize keepAllTiles, tileWidth, tileHeight, inputFilename, 
+			outputBaseFilename, outputSuffix, operationsDelegate, 
+			queue, allTilesInfo, imageInfo, outputFormat;
+@synthesize rigidTiles;
+@synthesize contentScaleFactor;
+@synthesize POTTiles;
+
+#pragma mark Public Methods
+
+- (id) init
+{
+	if ( (self == [super init]) )
+	{
+		self.queue = [[[NSOperationQueue alloc] init] autorelease];
+		[self.queue setMaxConcurrentOperationCount:1];
+		
+		self.outputFormat = NSPNGFileType;
+		self.outputSuffix = @"";
+		self.keepAllTiles = NO;
+		self.rigidTiles = NO;
+	}
+	
+	return self;
+}
+
+- (void) dealloc
+{
+	self.queue = nil;
+	self.allTilesInfo = nil;
+	self.imageInfo = nil;	
+	self.inputFilename = nil;
+	self.outputBaseFilename = nil;
+	self.outputSuffix = nil;
+	
+	[super dealloc];
+}
+
+- (void) startSavingTiles
+{
+    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; 
+    
+    NSImage *image = [[[NSImage alloc] initWithContentsOfFile: self.inputFilename] autorelease];
+        
+    progressCol = 0;
+    progressRow = 0;
+    
+    tileRowCount = [image rowsWithTileHeight: self.tileHeight];
+    tileColCount = [image columnsWithTileWidth: self.tileWidth];
+	
+	NSSize outputImageSizeForPlist = [image size];
+	outputImageSizeForPlist.width /= self.contentScaleFactor;
+	outputImageSizeForPlist.height /= self.contentScaleFactor;
+	self.imageInfo = [NSDictionary dictionaryWithObjectsAndKeys: 
+					  [self.inputFilename lastPathComponent], @"Filename",
+					  NSStringFromSize(outputImageSizeForPlist), @"Size", nil];
+	
+	self.allTilesInfo = [NSMutableArray arrayWithCapacity: tileRowCount * tileColCount];
+    
+	// One ImageRep for all TileOperation
+	NSBitmapImageRep *imageRep = 
+		[[[NSBitmapImageRep alloc] initWithCGImage:[image CGImageForProposedRect:NULL context:NULL hints:nil]] autorelease];
+	
+    for (int row = 0; row < tileRowCount; row++)
+    {
+        TileOperation *op = [[TileOperation alloc] init];
+        op.row = row;
+        op.tileWidth = self.tileWidth;
+        op.tileHeight = self.tileHeight;
+        op.imageRep = imageRep;
+        op.baseFilename = outputBaseFilename;
+        op.delegate = self;
+        op.outputFormat = self.outputFormat;
+		op.outputSuffix = self.outputSuffix;
+		op.skipTransparentTiles = (! self.keepAllTiles );
+		op.rigidTiles = self.rigidTiles;
+		op.POTTiles = self.POTTiles;
+        [queue addOperation:op];
+        [op release];
+    }
+    
+    [pool drain];
+}
+
+- (void)operationDidFinishTile:(TileOperation *)op
+{
+	progressCol++;
+    if (progressCol >= tileColCount)
+    {
+        progressCol = 0;
+        progressRow++;
+    }
+	
+	if ([self.operationsDelegate respondsToSelector: _cmd])
+		[self.operationsDelegate performSelectorOnMainThread: _cmd 
+												  withObject: op 
+											   waitUntilDone: NO];
+}
+
+- (void) saveImageInfoDictionary
+{
+	// Change coordinates & size of all tiles for contentScaleFactor
+	if (self.contentScaleFactor != 1.0f)
+	{
+		// Create new array, that will replace old self.allTilesInfo
+		NSMutableArray *newTilesInfoArray = [NSMutableArray arrayWithCapacity: [self.allTilesInfo count]];
+		
+		for (NSDictionary *tileDict in self.allTilesInfo)
+		{
+			// Get Tile Rect
+			NSRect rect = NSRectFromString([tileDict objectForKey: @"Rect"]);
+			
+			// Divide it by contentScaleFactor
+			rect.origin.x /= self.contentScaleFactor;
+			rect.origin.y /= self.contentScaleFactor;
+			rect.size.width /= self.contentScaleFactor;
+			rect.size.height /= self.contentScaleFactor;
+			
+			// Create new tile info Dict with changed rect
+			NSDictionary *newTileDict = [NSDictionary dictionaryWithObjectsAndKeys:
+										  [tileDict objectForKey:@"Name"], @"Name",
+										  NSStringFromRect(rect), @"Rect",
+										  nil];
+			
+			// Add new tile info for new array
+			[newTilesInfoArray addObject:newTileDict ];
+			
+		}
+		
+		// Replace Old Tiles with New
+		self.allTilesInfo = newTilesInfoArray;
+		
+	}
+	
+	// Create Root Dictionary for a PLIST file
+	NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:
+						  self.imageInfo, @"Source",
+						  self.allTilesInfo, @"Tiles",
+						  [NSNumber numberWithFloat:self.contentScaleFactor], @"ContentScaleFactor", nil];
+	
+	// Be safe with outputSuffix
+	if (!self.outputSuffix)
+		self.outputSuffix = @"";
+	
+	// Save Dict to File
+	[dict writeToFile:[NSString stringWithFormat:@"%@%@.plist", self.outputBaseFilename, self.outputSuffix]  atomically:YES];
+}
+
+- (void)operationDidFinishSuccessfully:(TileOperation *)op
+{
+	[(NSMutableArray *)self.allTilesInfo addObjectsFromArray: op.tilesInfo];
+	op.tilesInfo = nil;
+	
+	// All Tiles Finished?
+	if (progressRow >= tileRowCount)
+	{
+		[self saveImageInfoDictionary];
+	}
+	
+	if ([self.operationsDelegate respondsToSelector: _cmd])
+		[self.operationsDelegate performSelectorOnMainThread: _cmd 
+												  withObject: op 
+											   waitUntilDone: NO];
+}
+
+
+- (void)operation:(TileOperation *)op didFailWithMessage:(NSString *)message
+{
+	if ([self.operationsDelegate respondsToSelector: _cmd])
+		[self.operationsDelegate performSelectorOnMainThread: _cmd 
+												  withObject: op 
+											   waitUntilDone: NO];
+}
+
+
+@end
diff --git a/TileCutterSettings.h b/TileCutterSettings.h
new file mode 100644
index 0000000..0dbbcf5
--- /dev/null
+++ b/TileCutterSettings.h
@@ -0,0 +1,19 @@
+//
+//  TileCutterSettings.h
+//  Tile Cutter
+//
+//  Created by Stepan Generalov on 28.04.11.
+//  Copyright 2011 __MyCompanyName__. All rights reserved.
+//
+
+#import <Cocoa/Cocoa.h>
+
+typedef enum
+{
+    TileCutterOutputPrefsJPEG,
+    TileCutterOutputPrefsGIF,
+    TileCutterOutputPrefsTIFF,
+    TileCutterOutputPrefsBMP,
+    TileCutterOutputPrefsPNG,
+    TileCutterOutputPrefsJPEG2000
+} TileCutterOutputPrefs;
\ No newline at end of file
diff --git a/TileCutterView.h b/TileCutterView.h
index 4264348..14a7202 100644
--- a/TileCutterView.h
+++ b/TileCutterView.h
@@ -19,6 +19,7 @@
 @property (nonatomic, retain) IBOutlet NSColorWell *guideColorWell;
 @property (nonatomic, retain) NSImage *image;
 @property (nonatomic, retain) IBOutlet NSButton *guideCheckbox;
+@property (nonatomic, retain) IBOutlet NSButton *skipCheckbox;
 @property (nonatomic, retain) IBOutlet NSButton *saveButton;
 - (IBAction) valueChanged:(id)sender;
 @end
diff --git a/TileCutterView.m b/TileCutterView.m
index a9f827b..65e0300 100644
--- a/TileCutterView.m
+++ b/TileCutterView.m
@@ -11,6 +11,7 @@
 
 @implementation TileCutterView
 @synthesize filename, tileWidthField, tileHeightField, guideColorWell, image, guideCheckbox, saveButton;
+@synthesize skipCheckbox;
 
 - (id)initWithFrame:(NSRect)frame 
 {
diff --git a/TileOperation.h b/TileOperation.h
index 611c612..213886d 100644
--- a/TileOperation.h
+++ b/TileOperation.h
@@ -7,6 +7,7 @@
 //
 
 #import <Cocoa/Cocoa.h>
+#import "TileCutterSettings.h"
 
 @class TileOperation;
 
@@ -20,13 +21,26 @@
 
 @interface TileOperation : NSOperation 
 {
-
+	
 }
 @property (assign) NSObject <TileOperationDelegate> *delegate;
 @property (retain) NSBitmapImageRep *imageRep;
 @property NSUInteger row;
 @property (retain) NSString *baseFilename;
+@property (readwrite, copy) NSString *outputSuffix;
 @property NSUInteger tileHeight;
 @property NSUInteger tileWidth;
 @property TileCutterOutputPrefs outputFormat;
+@property (readwrite) BOOL skipTransparentTiles;
+@property (readwrite) BOOL rigidTiles;
+@property (readwrite) BOOL POTTiles;
+
+/* array of tiles info, 
+ * each item = NSDictionary {
+ *    NSString *name - output filename of tile
+ *    NSString from CGRect of that tile in source Image
+ */
+@property (readwrite, retain)NSMutableArray *tilesInfo;
+
+
 @end
diff --git a/TileOperation.m b/TileOperation.m
index 9110351..67c58f4 100644
--- a/TileOperation.m
+++ b/TileOperation.m
@@ -11,8 +11,41 @@
 #import "NSInvocation-MCUtilities.h"
 #import "NSBitmapImageRep-Tile.h"
 
+@interface NSBitmapImageRep (Extension)
+
+- (BOOL) isAbsoluteTransparent;
+
+@end
+
+@implementation NSBitmapImageRep (Extension)
+
+- (BOOL) isAbsoluteTransparent
+{	
+	NSSize s = [self size];
+	
+	for (int i = 0; i < s.width; ++i)
+	{
+		for (int j = 0; j < s.height; ++j)
+		{
+			NSColor *col = [self colorAtX:i y:j];
+			
+			if ([col alphaComponent] != 0.0f)
+				return NO;
+		}
+	}
+	
+	return YES;
+}
+
+@end
+
+
 @implementation TileOperation
 @synthesize delegate, imageRep, row, baseFilename, tileHeight, tileWidth, outputFormat;
+@synthesize tilesInfo;
+@synthesize skipTransparentTiles;
+@synthesize outputSuffix;
+@synthesize rigidTiles, POTTiles;
 #pragma mark -
 - (void)informDelegateOfError:(NSString *)message
 {
@@ -65,12 +98,25 @@ - (void)main
                 extension = @"jpg";
                 fileType = NSJPEGFileType;
                 break;
-        }
+        }		
         
+		// Get Tile Count for this Operation
 		int tileColCount = [imageRep columnsWithTileWidth:tileWidth];
+		
+		// Create tilesInfo Array for holding this Operation Tiles Info
+		self.tilesInfo = [NSMutableArray arrayWithCapacity: tileColCount];
+		
+		// Safe Empty Suffix
+		if (!self.outputSuffix)
+			self.outputSuffix = @"";
+		
         for (int column = 0; column < tileColCount; column++)
         {
-            NSImage *subImage = [imageRep subImageWithTileWidth:(float)tileWidth tileHeight:(float)tileHeight column:column row:row];
+            NSImage *subImage = [imageRep subImageWithTileWidth:(float)tileWidth
+													 tileHeight:(float)tileHeight 
+														 column:column 
+															row:row 
+													  rigidSize:self.rigidTiles];
             
             if (subImage == nil)
             {
@@ -78,38 +124,59 @@ - (void)main
                 goto finish;
             }
             
-            NSArray * representations = [subImage representations];
-            
-            if ([self isCancelled])
-                goto finish;
-            
-            NSData *bitmapData = [NSBitmapImageRep representationOfImageRepsInArray:representations 
-                                                                          usingType:fileType properties:nil];
-            
-            if (bitmapData == nil)
-            {
-                [self informDelegateOfError:NSLocalizedString(@"Error retrieving bitmap data from result", @"")];
-                goto finish;
-            }
-            
-            
+            NSArray * representations = [subImage representations];			
+            NSBitmapImageRep *subBitmapRep = nil;
+			if ( [representations count] )
+				subBitmapRep = [representations objectAtIndex: 0];
+			
             if ([self isCancelled])
                 goto finish;
             
-            NSString *outPath = [NSString stringWithFormat:@"%@_%d_%d.%@", baseFilename, row, column, extension];
-            [bitmapData writeToFile:outPath atomically:YES];
+			
+			
+			// Analyze do we need this tile saved
+			BOOL curTileNeeded = ! (self.skipTransparentTiles && [subBitmapRep isAbsoluteTransparent]);
+			
+			// save if yes
+			if ( curTileNeeded )
+			{			
+				NSData *bitmapData = [NSBitmapImageRep representationOfImageRepsInArray:representations 
+																			  usingType:fileType properties:nil];
+				
+				
+				if (bitmapData == nil)
+				{
+					[self informDelegateOfError:NSLocalizedString(@"Error retrieving bitmap data from result", @"")];
+					goto finish;
+				}
+				
+				
+				if ([self isCancelled])
+					goto finish;
+				
+				NSString *outPath = [NSString stringWithFormat:@"%@_%d_%d%@.%@", baseFilename, row, column, self.outputSuffix, extension];
+				[bitmapData writeToFile:outPath atomically:YES];
+				
+				// Add created Tile Info to tilesInfo array
+				NSRect tileRect = NSRectFromCGRect( CGRectMake(column * tileWidth, 
+															   row * tileHeight, 
+															   [subImage size].width, 
+															   [subImage size].height));
+				NSDictionary *tileInfoDict = [NSDictionary dictionaryWithObjectsAndKeys:
+											  [outPath lastPathComponent], @"Name",
+											  NSStringFromRect(tileRect), @"Rect",
+											  nil];
+				[(NSMutableArray *)self.tilesInfo addObject: tileInfoDict ];
+			}
             
             if ([delegate respondsToSelector:@selector(operationDidFinishTile:)])
-                [delegate performSelectorOnMainThread:@selector(operationDidFinishTile:) 
-                                           withObject:self 
-                                        waitUntilDone:NO];
+                [delegate operationDidFinishTile: self];
             
         }
         
         if ([delegate respondsToSelector:@selector(operationDidFinishSuccessfully:)])
-            [delegate performSelectorOnMainThread:@selector(operationDidFinishSuccessfully:) 
-                                       withObject:self 
-                                    waitUntilDone:NO];
+            [delegate operationDidFinishSuccessfully: self ];
+		
     finish:
         [pool drain];
     }
@@ -121,9 +188,11 @@ - (void)main
 
 - (void)dealloc
 {
+	self.outputSuffix = nil;
     delegate = nil;
     [imageRep release], imageRep = nil;
     [baseFilename release], baseFilename = nil;
+	self.tilesInfo = nil;
     
     [super dealloc];
 }
diff --git a/Tile_CutterAppDelegate.h b/Tile_CutterAppDelegate.h
index 596a057..e54af56 100644
--- a/Tile_CutterAppDelegate.h
+++ b/Tile_CutterAppDelegate.h
@@ -7,7 +7,7 @@
 //
 
 #import <Cocoa/Cocoa.h>
-#import "TileOperation.h"
+#import "TileCutterCore.h"
 @class TileCutterView;
 
 @interface Tile_CutterAppDelegate : NSObject <NSApplicationDelegate, TileOperationDelegate> 
@@ -23,7 +23,8 @@
 @property (retain) IBOutlet NSWindow *progressWindow;
 @property (retain) IBOutlet NSTextField *progressLabel;
 @property (retain) IBOutlet NSString *baseFilename;
-@property (nonatomic, retain) NSOperationQueue *queue;
+
+@property (retain) TileCutterCore *tileCore;
 
 - (IBAction)saveButtonPressed:(id)sender;
 - (IBAction)openSelected:(id)sender;
diff --git a/Tile_CutterAppDelegate.m b/Tile_CutterAppDelegate.m
index f901c2a..ca48cb3 100644
--- a/Tile_CutterAppDelegate.m
+++ b/Tile_CutterAppDelegate.m
@@ -16,18 +16,15 @@
 
 
 @interface Tile_CutterAppDelegate()
-{
-    int tileHeight, tileWidth;
-    int tileRowCount, tileColCount;
-    int progressCol, progressRow;
-}
+
 - (void)delayAlert:(NSString *)message;
+
 @end
 
 
 @implementation Tile_CutterAppDelegate
 
-@synthesize window, tileCutterView, widthTextField, heightTextField, rowBar, columnBar, progressWindow, progressLabel, baseFilename, queue;
+@synthesize window, tileCutterView, widthTextField, heightTextField, rowBar, columnBar, progressWindow, progressLabel, baseFilename;
 
 - (BOOL)application:(NSApplication *)sender openFile:(NSString *)filename
 {
@@ -55,50 +52,31 @@ - (void)applicationDidFinishLaunching:(NSNotification *)aNotification
         [defaults setInteger:200 forKey:@"heightField"];
     }
     
-    self.queue = [[[NSOperationQueue alloc] init] autorelease];
+	self.tileCore = [TileCutterCore new];
+	self.tileCore.operationsDelegate = self;
 }
+
 - (void)saveThread
 {
     NSLog(@"Save thread started");
     NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; 
     
-    NSImage *image = [[[NSImage alloc] initWithContentsOfFile:tileCutterView.filename] autorelease];
-    
-    [rowBar setIndeterminate:NO];
-    [columnBar setIndeterminate:NO];
-    [rowBar setMaxValue:(double)[image rowsWithTileHeight:[heightTextField floatValue]]];
-    [rowBar setMinValue:0.];
-    [rowBar setDoubleValue:0.];
-    [columnBar setMinValue:0.];
-    [columnBar setMaxValue:(double)[image columnsWithTileWidth:[widthTextField floatValue]]];
-    [columnBar setDoubleValue:0.];
-    
-    progressCol = 0;
-    progressRow = 0;
-    
-    tileRowCount = [image rowsWithTileHeight:tileHeight];
-    tileColCount = [image columnsWithTileWidth:tileWidth];
-    
-    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
-    TileCutterOutputPrefs outputFormat = (TileCutterOutputPrefs)[defaults integerForKey:@"OutputFormat"];
-    for (int row = 0; row < tileRowCount; row++)
-    {
-        // Each row operation gets its own ImageRep to avoid contention
-        NSBitmapImageRep *imageRep = [[[NSBitmapImageRep alloc] initWithCGImage:[image CGImageForProposedRect:NULL context:NULL hints:nil]] autorelease];
-        TileOperation *op = [[TileOperation alloc] init];
-        op.row = row;
-        op.tileWidth = tileWidth;
-        op.tileHeight = tileHeight;
-        op.imageRep = imageRep;
-        op.baseFilename = baseFilename;
-        op.delegate = self;
-        op.outputFormat = outputFormat;
-        [queue addOperation:op];
-        [op release];
-    }
+	
+	// Setup Tile Core
+	self.tileCore.inputFilename = tileCutterView.filename;
+	self.tileCore.outputFormat = (TileCutterOutputPrefs)[[NSUserDefaults standardUserDefaults] integerForKey:@"OutputFormat"];
+	self.tileCore.outputBaseFilename = baseFilename;
+	if (![tileCutterView.skipCheckbox intValue]) 
+		self.tileCore.keepAllTiles = YES;
+	else 
+		self.tileCore.keepAllTiles = NO;
+	
+	// Start Tiling
+	[self.tileCore startSavingTiles];    
     
     [pool drain];
 }
+
 - (IBAction)saveButtonPressed:(id)sender
 {
     NSSavePanel *sp = [NSSavePanel savePanel];
@@ -117,8 +95,8 @@ -(void)didEndSaveSheet:(NSSavePanel *)savePanel
     if (returnCode == NSOKButton) 
     {
         self.baseFilename = [[savePanel filename] stringByDeletingPathExtension];
-        tileHeight = [heightTextField intValue];
-        tileWidth = [widthTextField intValue];
+        self.tileCore.tileHeight = [heightTextField intValue];
+        self.tileCore.tileWidth = [widthTextField intValue];
         
         [self performSelector:@selector(delayPresentSheet) withObject:nil afterDelay:0.1];
     }
@@ -140,6 +118,7 @@ - (void)delayPresentSheet
     //[queue setSuspended:YES];
     [self performSelectorInBackground:@selector(saveThread) withObject:nil];
 }
+
 - (void)didEndSheet:(NSWindow *)sheet returnCode:(NSInteger)returnCode contextInfo:(void *)contextInfo
 {
     [sheet orderOut:self];
@@ -161,33 +140,29 @@ - (IBAction)openSelected:(id)sender
 }
 - (void)dealloc
 {
+	self.tileCore = nil;
     [columnBar release], columnBar = nil;
     [rowBar release], rowBar = nil;
     [progressWindow release], progressWindow = nil;
     [progressLabel release], progressLabel = nil;
     [baseFilename release], baseFilename = nil;
-    [queue release], queue = nil;
     [super dealloc];
 }
 #pragma mark -
 - (void)updateProgress
 {
-    if (progressRow >= tileRowCount)
+    if (self.tileCore.progressRow >= self.tileCore.tileRowCount)
+	{
         [NSApp endSheet:progressWindow];
+	}
     
 //    [rowBar setDoubleValue:(double)progressRow];
 //    [columnBar setDoubleValue:(double)progressCol];
-    [progressLabel setStringValue:[NSString stringWithFormat:@"Processing row %d, column %d", progressRow, progressCol]]; 
+    [progressLabel setStringValue:[NSString stringWithFormat:@"Processing row %d, column %d", self.tileCore.progressRow, self.tileCore.progressCol]]; 
 }
 - (void)operationDidFinishTile:(TileOperation *)op
 {
-    progressCol++;
-    if (progressCol >= tileColCount)
-    {
-        progressCol = 0;
-        progressRow++;
-    }
-    if (progressRow >= tileRowCount)
+    if (self.tileCore.progressRow >= self.tileCore.tileRowCount)
         [NSApp endSheet:progressWindow];
     
 //    [rowBar setDoubleValue:(double)progressRow];
@@ -196,6 +171,12 @@ - (void)operationDidFinishTile:(TileOperation *)op
     
     [self performSelectorOnMainThread:@selector(updateProgress) withObject:nil waitUntilDone:NO];
 }
+
+- (void)operationDidFinishSuccessfully:(TileOperation *)op
+{
+	
+}
+
 - (void)delayAlert:(NSString *)message
 {
     NSAlert *alert = [[[NSAlert alloc] init] autorelease];
@@ -205,6 +186,7 @@ - (void)delayAlert:(NSString *)message
     [alert setAlertStyle:NSCriticalAlertStyle];
     [alert beginSheetModalForWindow:[self window] modalDelegate:nil didEndSelector:nil contextInfo:nil];
 }
+
 - (void)operation:(TileOperation *)op didFailWithMessage:(NSString *)message
 {
     [NSApp endSheet:progressWindow];
diff --git a/Tile_Cutter_Prefix.pch b/Tile_Cutter_Prefix.pch
index 21d7b6c..b4fbdc8 100644
--- a/Tile_Cutter_Prefix.pch
+++ b/Tile_Cutter_Prefix.pch
@@ -4,15 +4,4 @@
 
 #ifdef __OBJC__
     #import <Cocoa/Cocoa.h>
-#endif
-
-
-typedef enum
-{
-    TileCutterOutputPrefsJPEG,
-    TileCutterOutputPrefsGIF,
-    TileCutterOutputPrefsTIFF,
-    TileCutterOutputPrefsBMP,
-    TileCutterOutputPrefsPNG,
-    TileCutterOutputPrefsJPEG2000
-} TileCutterOutputPrefs;
\ No newline at end of file
+#endif
\ No newline at end of file
diff --git a/cmdToolMain.m b/cmdToolMain.m
new file mode 100644
index 0000000..1725ef1
--- /dev/null
+++ b/cmdToolMain.m
@@ -0,0 +1,207 @@
+//
+//  cmdToolMain.m
+//  Tile Cutter
+//
+//  Created by Stepan Generalov on 28.04.11.
+//  Copyright 2011 __MyCompanyName__. All rights reserved.
+//
+
+#import <Cocoa/Cocoa.h> 
+
+#import <stdio.h>
+#import <stdlib.h>
+#import <getopt.h>
+
+#import "TileCutterCore.h"
+#import "TileCutterSettings.h"
+
+void printUsageAndExit()
+{
+	printf("\nUsage: tileCutter [--rigidTilesSize | --roundTileSizeToPOT] [--keepTransparentTiles] --tileWidth WIDTH --tileHeight HEIGHT \
+--inputFile INPUT.PNG --outputFile OUTPUT [--outputSuffix SUFFIX]\n\
+HEIGHT & WIDTH should be >= 1\n\
+output tiles file names will be in this format:\n\
+OUTPUT_X_Y-SUFFIX.png,\n\
+where X & Y is tile number\n\
+Output plist file will be: OUTPUT.plist\n\
+If --rigidTilesSize flag is set, then all tiles will have the same size.\n\
+If --roundTileSizeToPOT flag is set, then all tiles will have POT size, and rigidTileSize will be disabled.\n\
+If image isn't divisible by tileSize without a remainder - missing pixels will be added.\n\
+If --keepTransparentTiles flag is set, than absolute transparent tiles will be not skiped.\n\
+--contentScaleFactor is used as denominator for tiles & image sizes & positions in plist file.\n");
+	exit(0);
+}
+
+BOOL fileExists(NSString* relPath)
+{
+	NSString *fullpath = nil;
+	
+	// only if it is not an absolute path
+	if( ! [relPath isAbsolutePath] )
+	{
+		NSString *file = [relPath lastPathComponent];
+		NSString *imageDirectory = [relPath stringByDeletingLastPathComponent];
+		
+		fullpath = [[NSBundle mainBundle] pathForResource:file
+												   ofType:nil
+											  inDirectory:imageDirectory];
+	}
+	
+	if (fullpath == nil)
+		fullpath = relPath;
+	
+	return [[NSFileManager defaultManager] fileExistsAtPath: fullpath];
+}
+
+int main(int argc, char *argv[])
+{
+	// Options Storage
+	int keepAllTiles = 0;
+	int rigidTilesSize = 0;
+	int roundTileSizeToPOT = 0;
+	NSUInteger tileWidth = 0;
+	NSUInteger tileHeight = 0;
+	NSString *inputFilename = nil;
+	NSString *outputBaseFilename = nil;
+	NSString *outputSuffix = nil;
+	float_t contentScaleFactor = 1.0f;
+	
+	NSAutoreleasePool *pool = [NSAutoreleasePool new];
+	
+	int c;
+	
+	if (argc <= 1) 
+	{
+		[pool release];
+		printUsageAndExit();
+	}
+	
+	while (1)
+	{
+		struct option long_options[] =
+		{
+			/* These options set a flag. */
+			{"skipTransparentTiles",   no_argument,       &keepAllTiles, 0},
+			{"keepTransparentTiles",   no_argument,       &keepAllTiles, 1},
+			{"rigidTilesSize",         no_argument,       &rigidTilesSize, 1},
+			{"roundTileSizeToPOT",     no_argument,       &rigidTilesSize, 0},			
+			/* These options don't set a flag.
+			 We distinguish them by their indices. */
+			{"tileWidth",    required_argument, 0, 'w'},
+			{"tileHeight",   required_argument, 0, 'h'},
+			{"inputFile",    required_argument, 0, 'i'},
+			{"outputFile",   required_argument, 0, 'o'},
+			{"outputSuffix", required_argument, 0, 's'},
+			{"contentScaleFactor", required_argument, 0, 'f'},
+			{0, 0, 0, 0}
+		};
+		/* getopt_long stores the option index here. */
+		int option_index = 0;
+		
+		c = getopt_long (argc, argv, "w:h:i:o:s:",
+						 long_options, &option_index);
+		
+		/* Detect the end of the options. */
+		if (c == -1)
+			break;
+		
+		switch (c)
+		{
+			case 0:
+				/* If this option set a flag, do nothing else now. */
+				if (long_options[option_index].flag != 0)
+					break;
+				
+				// if this is unkown option - print usage and exit
+				[pool release];
+				printUsageAndExit();
+				
+				break;
+				
+			case 'w':
+				tileWidth = (NSUInteger)[[NSString stringWithCString: optarg encoding: NSUTF8StringEncoding] intValue];
+				if (!tileWidth)
+				{
+					[pool release];
+					printUsageAndExit();
+				}
+				break;
+				
+			case 'h':
+				tileHeight = (NSUInteger)[[NSString stringWithCString: optarg encoding: NSUTF8StringEncoding] intValue];
+				if (!tileHeight)
+				{
+					[pool release];
+					printUsageAndExit();
+				}
+				break;
+				
+			case 'i':
+				inputFilename = [NSString stringWithCString: optarg encoding: NSUTF8StringEncoding];
+				break;
+				
+			case 'o':
+				outputBaseFilename = [NSString stringWithCString:optarg encoding: NSUTF8StringEncoding];
+				break;
+				
+			case 's':
+				outputSuffix = [NSString stringWithCString:optarg encoding: NSUTF8StringEncoding];
+				break;
+				
+			case 'f':
+				contentScaleFactor = [[NSString stringWithCString:optarg encoding: NSUTF8StringEncoding] floatValue];
+				if (!contentScaleFactor)
+					contentScaleFactor = 1.0f;
+				break;
+				
+			case '?':
+				/* getopt_long already printed an error message. */
+				[pool release];
+				printUsageAndExit();
+				break;
+				
+			default:
+				abort ();
+		}
+	}
+	
+	
+	// We don't accept any nonOptions cmd line arguments
+	if (optind < argc)
+	{
+		[pool release];
+		printUsageAndExit();
+	}
+	
+	// avoid crashing if file not exists
+	if ( !fileExists(inputFilename) )
+	{
+		printf("\nFile not found: %s \n", [inputFilename cStringUsingEncoding:NSUTF8StringEncoding]);
+		[pool release];
+		exit(0);
+	}
+	
+	// Round To POT must disable rigidTileSize.
+	if (roundTileSizeToPOT)
+		rigidTilesSize = 0;
+	
+	// Prepare Tile Cutter
+	TileCutterCore *tileCutterCore = [TileCutterCore new];
+	tileCutterCore.inputFilename = inputFilename;
+	tileCutterCore.outputBaseFilename = outputBaseFilename;
+	tileCutterCore.outputSuffix = outputSuffix;
+	tileCutterCore.tileWidth = tileWidth;
+	tileCutterCore.tileHeight = tileWidth;
+	tileCutterCore.keepAllTiles = (keepAllTiles != 0);
+	tileCutterCore.rigidTiles = (rigidTilesSize != 0);
+	tileCutterCore.POTTiles = (roundTileSizeToPOT != 0);
+	tileCutterCore.contentScaleFactor = contentScaleFactor;
+	
+	// Start Cutting and Wait for it.
+	[tileCutterCore startSavingTiles];
+	[tileCutterCore.queue waitUntilAllOperationsAreFinished];
+	
+	[pool release];
+	return 0;
+}
+