Generalize SheetBuilder overflow behavior.

OpenRA.Game/Graphics/SheetBuilder.cs

@@ -15,11 +15,8 @@ namespace OpenRA.Graphics
 {
 	public class SheetOverflowException : Exception
 	{
-		public SheetOverflowException()
-			: base("Sprite sequence spans multiple sheets.\n"+
-				"This should be considered as a bug, but you "+
-				"can increase the Graphics.SheetSize setting "+
-				"to temporarily avoid the problem.") {}
+		public SheetOverflowException(string message)
+			: base(message) {}
 	}
 
 	public enum SheetType
@@ -36,28 +33,38 @@ namespace OpenRA.Graphics
 		SheetType type;
 		int rowHeight = 0;
 		Point p;
+		Func<Sheet> allocateSheet;
 
-		internal SheetBuilder(SheetType t)
+		public static Sheet AllocateSheet()
 		{
-			current = new Sheet(new Size(Renderer.SheetSize, Renderer.SheetSize));;
-			channel = TextureChannel.Red;
-			type = t;
+			return new Sheet(new Size(Renderer.SheetSize, Renderer.SheetSize));;
 		}
 
-		public Sprite Add(byte[] src, Size size, bool allowSheetOverflow)
+		internal SheetBuilder(SheetType t)
+			: this(t, AllocateSheet) {}
+
+		internal SheetBuilder(SheetType t, Func<Sheet> allocateSheet)
 		{
-			var rect = Allocate(size, allowSheetOverflow);
+			channel = TextureChannel.Red;
+			type = t;
+			current = allocateSheet();
+			this.allocateSheet = allocateSheet;
+		}
+
+		public Sprite Add(byte[] src, Size size)
+		{
+			var rect = Allocate(size);
 			Util.FastCopyIntoChannel(rect, src);
 			return rect;
 		}
 
-		public Sprite Add(Size size, byte paletteIndex, bool allowSheetOverflow)
+		public Sprite Add(Size size, byte paletteIndex)
 		{
 			var data = new byte[size.Width * size.Height];
 			for (var i = 0; i < data.Length; i++)
 				data[i] = paletteIndex;
 
-			return Add(data, size, allowSheetOverflow);
+			return Add(data, size);
 		}
 
 		TextureChannel? NextChannel(TextureChannel t)
@@ -69,7 +76,7 @@ namespace OpenRA.Graphics
 			return (TextureChannel)nextChannel;
 		}
 
-		public Sprite Allocate(Size imageSize, bool allowSheetOverflow)
+		public Sprite Allocate(Size imageSize)
 		{
 			if (imageSize.Width + p.X > current.Size.Width)
 			{
@@ -85,10 +92,7 @@ namespace OpenRA.Graphics
 				var next = NextChannel(channel);
 				if (next == null)
 				{
-					if (!allowSheetOverflow)
-						throw new SheetOverflowException();
-
-					current = new Sheet(new Size(Renderer.SheetSize, Renderer.SheetSize));
+					current = allocateSheet();
 					channel = TextureChannel.Red;
 				}
 				else

OpenRA.Game/Graphics/SpriteFont.cs

@@ -99,7 +99,7 @@ namespace OpenRA.Graphics
 			face.Glyph.RenderGlyph(RenderMode.Normal);
 
 			var size = new Size((int)face.Glyph.Metrics.Width >> 6, (int)face.Glyph.Metrics.Height >> 6);
-			var s = builder.Allocate(size, true);
+			var s = builder.Allocate(size);
 
 			var g = new GlyphInfo
 			{

OpenRA.Game/Graphics/SpriteLoader.cs

@@ -35,12 +35,12 @@ namespace OpenRA.Graphics
 			if (ImageCount == 0)
 			{
 				var shp = new ShpTSReader(FileSystem.OpenWithExts(filename, exts));
-				return shp.Select(a => SheetBuilder.Add(a.Image, shp.Size, true)).ToArray();
+				return shp.Select(a => SheetBuilder.Add(a.Image, shp.Size)).ToArray();
 			}
 			else
 			{
 				var shp = new ShpReader(FileSystem.OpenWithExts(filename, exts));
-				return shp.Frames.Select(a => SheetBuilder.Add(a.Image, shp.Size, true)).ToArray();
+				return shp.Frames.Select(a => SheetBuilder.Add(a.Image, shp.Size)).ToArray();
 			}
 		}
 

OpenRA.Game/Graphics/TerrainRenderer.cs

@@ -29,11 +29,22 @@ namespace OpenRA.Graphics
 			this.world = world;
 			this.map = world.Map;
 
+			var allocated = false;
+			Func<Sheet> allocate = () =>
+			{
+				if (allocated)
+					throw new SheetOverflowException("Terrain sheet overflow");
+				allocated = true;
+
 				// TODO: Use a fixed sheet size specified in the tileset yaml
-			sheetBuilder = new SheetBuilder(SheetType.Indexed);
+				return SheetBuilder.AllocateSheet();
+			};
+
+			sheetBuilder = new SheetBuilder(SheetType.Indexed, allocate);
+
 			var tileSize = new Size(Game.CellSize, Game.CellSize);
 			var tileMapping = new Cache<TileReference<ushort,byte>, Sprite>(
-				x => sheetBuilder.Add(world.TileSet.GetBytes(x), tileSize, false));
+				x => sheetBuilder.Add(world.TileSet.GetBytes(x), tileSize));
 
 			var terrainPalette = wr.Palette("terrain").Index;
 			var vertices = new Vertex[4 * map.Bounds.Height * map.Bounds.Width];

OpenRA.Game/Graphics/VoxelLoader.cs

@@ -41,6 +41,20 @@ namespace OpenRA.Graphics
 		int totalVertexCount;
 		int cachedVertexCount;
 
+		SheetBuilder CreateSheetBuilder()
+		{
+			var allocated = false;
+			Func<Sheet> allocate = () =>
+			{
+				if (allocated)
+					throw new SheetOverflowException("");
+				allocated = true;
+				return SheetBuilder.AllocateSheet();
+			};
+
+			return new SheetBuilder(SheetType.DualIndexed, allocate);
+		}
+
 		public VoxelLoader()
 		{
 			voxels = new Cache<Pair<string,string>, Voxel>(LoadFile);
@@ -48,7 +62,7 @@ namespace OpenRA.Graphics
 			totalVertexCount = 0;
 			cachedVertexCount = 0;
 
-			sheetBuilder = new SheetBuilder(SheetType.DualIndexed);
+			sheetBuilder = CreateSheetBuilder();
 		}
 
 		static float[] channelSelect = { 0.75f, 0.25f, -0.25f, -0.75f };
@@ -67,7 +81,7 @@ namespace OpenRA.Graphics
 				c++;
 			}
 
-			Sprite s = sheetBuilder.Allocate(new Size(su, sv), false);
+			Sprite s = sheetBuilder.Allocate(new Size(su, sv));
 			Util.FastCopyIntoChannel(s, 0, colors);
 			Util.FastCopyIntoChannel(s, 1, normals);
 			s.sheet.MakeDirty();
@@ -164,7 +178,7 @@ namespace OpenRA.Graphics
 			{
 				// Sheet overflow - allocate a new sheet and try once more
 				Log.Write("debug", "Voxel sheet overflow! Generating new sheet");
-				sheetBuilder = new SheetBuilder(SheetType.DualIndexed);
+				sheetBuilder = CreateSheetBuilder();
 				v = GenerateSlicePlanes(l).SelectMany(x => x).ToArray();
 			}
 

OpenRA.Mods.RA/Bridge.cs

@@ -101,7 +101,7 @@ namespace OpenRA.Mods.RA
 				cachedTileset = self.World.Map.Tileset;
 				var tileSize = new Size(Game.CellSize, Game.CellSize);
 				sprites = new Cache<TileReference<ushort,byte>, Sprite>(
-					x => Game.modData.SheetBuilder.Add(self.World.TileSet.GetBytes(x), tileSize, true));
+					x => Game.modData.SheetBuilder.Add(self.World.TileSet.GetBytes(x), tileSize));
 			}
 
 			// Cache templates and tiles for the different states