git-svn-id: svn://svn.ijw.co.nz/svn/OpenRa@2049 993157c7-ee19-0410-b2c4-bb4e9862e678

OpenRa.Game/Graphics/SpriteRenderer.cs

@@ -0,0 +1,67 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using OpenRa.FileFormats;
+using System.Drawing;
+using Ijw.DirectX;
+
+namespace OpenRa.Game.Graphics
+{
+	class SpriteRenderer
+	{
+		FvfVertexBuffer<Vertex> vertexBuffer;
+		IndexBuffer indexBuffer;
+		Renderer renderer;
+
+		const int spritesPerBatch = 1024;
+
+        Vertex[] vertices = new Vertex[4 * spritesPerBatch];
+        ushort[] indices = new ushort[6 * spritesPerBatch];
+		Sheet currentSheet = null;
+		int sprites = 0;
+		ShaderQuality quality;
+        int nv = 0, ni = 0;
+
+		public SpriteRenderer(Renderer renderer, bool allowAlpha)
+		{
+			this.renderer = renderer;
+
+			vertexBuffer = new FvfVertexBuffer<Vertex>(renderer.Device, vertices.Length, Vertex.Format);
+			indexBuffer = new IndexBuffer(renderer.Device, indices.Length);
+
+			quality = allowAlpha ? ShaderQuality.High : ShaderQuality.Low;
+		}
+
+		public void Flush()
+		{
+			if (sprites > 0)
+			{
+				renderer.DrawWithShader(quality, () =>
+				{
+					vertexBuffer.SetData(vertices);
+					indexBuffer.SetData(indices);
+					renderer.DrawBatch(vertexBuffer, indexBuffer,
+						new Range<int>(0, nv),
+						new Range<int>(0, ni),
+						currentSheet.Texture);
+				});
+
+                nv = 0; ni = 0;
+				currentSheet = null;
+				sprites = 0;
+			}
+		}
+
+		public void DrawSprite(Sprite s, float2 location, int palette)
+		{
+			if (s.sheet != currentSheet)
+				Flush();
+
+			currentSheet = s.sheet;
+			Util.FastCreateQuad(vertices, indices, location, s, palette, nv, ni);
+            nv += 4; ni += 6;
+			if (++sprites >= spritesPerBatch)
+				Flush();
+		}
+	}
+}