git-svn-id: svn://svn.ijw.co.nz/svn/OpenRa@1206 993157c7-ee19-0410-b2c4-bb4e9862e678

OpenRa.Game/SpriteRenderer.cs

@@ -0,0 +1,64 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using BluntDirectX.Direct3D;
+using OpenRa.FileFormats;
+using System.Drawing;
+
+namespace OpenRa.Game
+{
+	class SpriteRenderer
+	{
+		FvfVertexBuffer<Vertex> vertexBuffer;
+		IndexBuffer indexBuffer;
+		Renderer renderer;
+
+		const int spritesPerBatch = 1024;
+
+		List<Vertex> vertices = new List<Vertex>();
+		List<ushort> indicies = new List<ushort>();
+		Sheet currentSheet = null;
+		int sprites = 0;
+
+		public SpriteRenderer(Renderer renderer)
+		{
+			this.renderer = renderer;
+
+			vertexBuffer = new FvfVertexBuffer<Vertex>(renderer.Device, 4 * spritesPerBatch, Vertex.Format);
+			indexBuffer = new IndexBuffer(renderer.Device, 6 * spritesPerBatch);
+		}
+
+		public void Flush()
+		{
+			if (sprites > 0)
+			{
+				renderer.DrawWithShader(ShaderQuality.Low, delegate
+				{
+					vertexBuffer.SetData(vertices.ToArray());
+					indexBuffer.SetData(indicies.ToArray());
+					renderer.DrawBatch(vertexBuffer, indexBuffer,
+						new Range<int>(0, vertices.Count),
+						new Range<int>(0, indicies.Count),
+						currentSheet.Texture);
+				});
+
+				vertices = new List<Vertex>();
+				indicies = new List<ushort>();
+				currentSheet = null;
+				sprites = 0;
+			}
+		}
+
+		public void DrawSprite(SheetRectangle<Sheet> s, PointF location)
+		{
+			if (s.sheet != currentSheet)
+				Flush();
+
+			currentSheet = s.sheet;
+			Util.CreateQuad(vertices, indicies, location, s, 0);
+
+			if (++sprites >= spritesPerBatch)
+				Flush();
+		}
+	}
+}