Use SpriteLoader for frame exporting.

OpenRA.Game/FileFormats/R8Reader.cs

@@ -23,6 +23,7 @@ namespace OpenRA.FileFormats
 			public Size FrameSize { get; private set; }
 			public float2 Offset { get; private set; }
 			public byte[] Data { get; set; }
+			public bool DisableExportPadding { get { return true; } }
 
 			public R8Image(Stream s)
 			{

OpenRA.Game/FileFormats/ShpD2Reader.cs

@@ -30,6 +30,7 @@ namespace OpenRA.FileFormats
 			public Size FrameSize { get { return Size; } }
 			public float2 Offset { get { return float2.Zero; } }
 			public byte[] Data { get; set; }
+			public bool DisableExportPadding { get { return false; } }
 
 			public Frame(Stream s)
 			{

OpenRA.Game/FileFormats/ShpReader.cs

@@ -27,6 +27,7 @@ namespace OpenRA.FileFormats
 			public Size FrameSize { get { return reader.Size; } }
 			public float2 Offset { get { return float2.Zero; } }
 			public byte[] Data { get; set; }
+			public bool DisableExportPadding { get { return false; } }
 
 			public uint FileOffset;
 			public Format Format;

OpenRA.Game/FileFormats/ShpTSReader.cs

@@ -22,6 +22,7 @@ namespace OpenRA.FileFormats
 			public Size FrameSize { get; private set; }
 			public float2 Offset { get; private set; }
 			public byte[] Data { get; set; }
+			public bool DisableExportPadding { get { return false; } }
 
 			public readonly uint FileOffset;
 			public readonly byte Format;

OpenRA.Game/FileFormats/TmpTDReader.cs

@@ -20,6 +20,7 @@ namespace OpenRA.FileFormats
 		public Size FrameSize { get; private set; }
 		public float2 Offset { get { return float2.Zero; } }
 		public byte[] Data { get; set; }
+		public bool DisableExportPadding { get { return false; } }
 
 		public TmpTile(byte[] data, Size size)
 		{

OpenRA.Game/FileFormats/TmpTSReader.cs

@@ -21,6 +21,7 @@ namespace OpenRA.FileFormats
 		public Size FrameSize { get { return Size; } }
 		public float2 Offset { get { return float2.Zero; } }
 		public byte[] Data { get; set; }
+		public bool DisableExportPadding { get { return false; } }
 
 		public TmpTSTile(Stream s, Size size)
 		{

OpenRA.Game/Graphics/SpriteSource.cs

@@ -20,6 +20,7 @@ namespace OpenRA.Graphics
 		Size FrameSize { get; }
 		float2 Offset { get; }
 		byte[] Data { get; }
+		bool DisableExportPadding { get; }
 	}
 
 	public interface ISpriteSource

OpenRA.Mods.Common/UtilityCommands/ConvertSpriteToPngCommand.cs

@@ -41,19 +41,17 @@ namespace OpenRA.Mods.Common.UtilityCommands
 
 			var palette = new ImmutablePalette(args[2], shadowIndex);
 
-			ISpriteSource source;
-			using (var stream = File.OpenRead(src))
-				source = SpriteSource.LoadSpriteSource(stream, src);
+			var frames = new SpriteLoader(new string[0], null)
+				.LoadAllFrames(src);
 
-			// The r8 padding requires external information that we can't access here.
-			var usePadding = !(args.Contains("--nopadding") || source is R8Reader);
+			var usePadding = !args.Contains("--nopadding");
 			var count = 0;
 			var prefix = Path.GetFileNameWithoutExtension(src);
 
-			foreach (var frame in source.Frames)
+			foreach (var frame in frames)
 			{
-				var frameSize = usePadding ? frame.FrameSize : frame.Size;
-				var offset = usePadding ? (frame.Offset - 0.5f * new float2(frame.Size - frame.FrameSize)).ToInt2() : int2.Zero;
+				var frameSize = usePadding && !frame.DisableExportPadding ? frame.FrameSize : frame.Size;
+				var offset = usePadding && !frame.DisableExportPadding ? (frame.Offset - 0.5f * new float2(frame.Size - frame.FrameSize)).ToInt2() : int2.Zero;
 
 				// shp(ts) may define empty frames
 				if (frameSize.Width == 0 && frameSize.Height == 0)
@@ -69,7 +67,7 @@ namespace OpenRA.Mods.Common.UtilityCommands
 						ImageLockMode.WriteOnly, PixelFormat.Format8bppIndexed);
 
 					// Clear the frame
-					if (usePadding)
+					if (usePadding && !frame.DisableExportPadding)
 					{
 						var clearRow = new byte[data.Stride];
 						for (var i = 0; i < frameSize.Height; i++)