renderer work

src/PlatformLayer/Batch.bf

@@ -0,0 +1,30 @@
+namespace Strawberry
+{
+	public enum BatchModes
+	{
+		TextureTint,
+		TextureWash,
+		Shape,
+	}
+
+	public struct Batch
+	{
+		public int IndicesStart;
+		public int IndicesCount;
+		public Texture Texture;
+		public BatchModes Mode;
+
+		public this(BatchModes mode, Texture texture, int start)
+		{
+			Mode = mode;
+			Texture = texture;
+			IndicesStart = start;
+			IndicesCount = 0;
+		}
+
+		public bool Matches(BatchModes mode, Texture texture)
+		{
+			return Mode == mode && Texture == texture;
+		}
+	}
+}

src/PlatformLayer/Batcher.bf

@@ -4,6 +4,7 @@ namespace Strawberry
 {
 	public class Batcher
 	{
+		private List<Batch> batches = new .() ~ delete _;
 		private List<Vertex> vertices = new .() ~ delete _;
 		private List<uint32> indices = new .() ~ delete _;
 
@@ -47,15 +48,33 @@ namespace Strawberry
 			GL.glBindBuffer(GL.GL_ELEMENT_ARRAY_BUFFER, indexBufferID);
 			GL.glBufferData(GL.GL_ELEMENT_ARRAY_BUFFER, indices.Count * sizeof(uint32), indices.Ptr, GL.GL_DYNAMIC_DRAW);
 
-			GL.glDrawElements(GL.GL_TRIANGLES, indices.Count, GL.GL_UNSIGNED_INT, (void*)0);
+			for (let b in batches)
+			{
+				if (b.Mode == .Shape)
+					GL.glBindTexture(GL.GL_TEXTURE_2D, 0);
+				else
+					GL.glBindTexture(GL.GL_TEXTURE_2D, b.Texture.Handle);
+				GL.glDrawElements(GL.GL_TRIANGLES, b.IndicesCount, GL.GL_UNSIGNED_INT, (void*)(b.IndicesStart * sizeof(uint32)));
+			}
+			
 			GL.glBindVertexArray(0);
 
 			vertices.Clear();
 			indices.Clear();
+			batches.Clear();
 		}
 
-		protected void PushQuad(Vertex a, Vertex b, Vertex c, Vertex d)
+		private ref Batch GetBatch(BatchModes mode, Texture texture)
 		{
+			if (batches.Count == 0 || !batches.Back.Matches(mode, texture))
+				batches.Add(Batch(mode, texture, indices.Count));
+			return ref batches.Back;
+		}
+
+		protected void PushQuad(BatchModes mode, Texture texture, Vertex a, Vertex b, Vertex c, Vertex d)
+		{
+			GetBatch(mode, texture).IndicesCount += 6;
+
 			uint32 count = (uint32)vertices.Count;
 
 			vertices.Add(a);
@@ -71,8 +90,10 @@ namespace Strawberry
 			indices.Add(count + 3);
 		}
 
-		protected void PushTri(Vertex a, Vertex b, Vertex c)
+		protected void PushTri(BatchModes mode, Texture texture, Vertex a, Vertex b, Vertex c)
 		{
+			GetBatch(mode, texture).IndicesCount += 3;
+
 			uint32 count = (uint32)vertices.Count;
 
 			vertices.Add(a);
@@ -86,12 +107,25 @@ namespace Strawberry
 
 		public void Rect(float x, float y, float w, float h, Color color)
 		{
-			PushQuad(.Shape(.(x, y), color), .Shape(.(x + w, y), color), .Shape(.(x + w, y + h), color), .Shape(.(x, y + h), color)); 
+			PushQuad(.Shape, null,
+				.Shape(.(x, y), color),
+				.Shape(.(x + w, y), color),
+				.Shape(.(x + w, y + h), color),
+				.Shape(.(x, y + h), color)); 
 		}
 
 		public void Rect(Rect rect, Color color)
 		{
 			Rect(rect.X, rect.Y, rect.Width, rect.Height, color);
 		}
+
+		public void Tex(Texture texture, float x, float y)
+		{
+			PushQuad(.TextureTint, texture,
+				.Tex(.(x, y), .(0, 1), Color.White),
+				.Tex(.(x + texture.Width, y), .(1, 1), Color.White),
+				.Tex(.(x + texture.Width, y + texture.Height), .(1, 0), Color.White),
+				.Tex(.(x, y + texture.Height), .(0, 0), Color.White));
+		}
 	}
 }

src/PlatformLayer/SDL2PlatformLayer.bf

@@ -166,7 +166,10 @@ namespace Strawberry.SDL2
 
 		public override Texture LoadTexture(String path)
 		{
-			var surface = SDLImage.Load(path);
+			let surface = SDLImage.Load(path);
+			Debug.Assert(surface != null, "Could not load from path.");
+			Debug.Assert(surface.format.bytesPerPixel == 4, "Surface format incorrect.");
+
 			var tex = new Texture(surface.w, surface.h, (uint8*)surface.pixels);
 			SDL.FreeSurface(surface);
 

src/PlatformLayer/Vertex.bf

@@ -18,5 +18,15 @@ namespace Strawberry
 			v.Mode = (0, 0, 255);
 			return v;
 		}
+
+		static public Vertex Tex(Vector pos, Vector texCoord, Color color)
+		{
+			Vertex v = Vertex();
+			v.Position = pos;
+			v.TexCoord = texCoord;
+			v.Color = color;
+			v.Mode = (255, 0, 0);
+			return v;
+		}
 	}
 }