initial sprite batch implementation & testbed

Sources/Voxelotl/Renderer/Metal/RendererTexture2D.swift

@@ -0,0 +1,20 @@
+import Metal
+
+public struct RendererTexture2D: Hashable {
+  internal let _textureBuffer: MTLTexture
+  public let size: Size<Int>
+
+  internal init(metalTexture: MTLTexture, size: Size<Int>) {
+    self._textureBuffer = metalTexture
+    self.size = size
+  }
+
+  public static func == (lhs: Self, rhs: Self) -> Bool {
+    lhs._textureBuffer.gpuResourceID._impl == rhs._textureBuffer.gpuResourceID._impl && lhs.size == rhs.size
+  }
+
+  public func hash(into hasher: inout Hasher) {
+    hasher.combine(self._textureBuffer.hash)
+  }
+}
+