make Draw{Box,Texture} take a Rectangle

Program.cs

@@ -308,16 +308,20 @@ public class Game : GameWindow {
 
     DrawTexture(active, letterboxWidth, 0, photoWidth, windowHeight);
     for (int i = 0; i < textures.Count; i++) {
-      // FIXME: make this a rect or something
-      DrawTexture(textures[i], windowWidth - thumbnailWidth, i * thumbnailHeight, thumbnailWidth, thumbnailHeight - borderWidth);
+      Rectangle box = new Rectangle(windowWidth - thumbnailWidth, i * thumbnailHeight, thumbnailWidth, thumbnailHeight - borderWidth);
+      DrawTexture(textures[i], box);
       if (i == textureIndex) {
-        DrawBox(windowWidth - thumbnailWidth, i * thumbnailHeight, thumbnailWidth, thumbnailHeight - borderWidth, 2);
+        DrawBox(box, 2);
       }
     }
 
     SwapBuffers();
   }
 
+  void DrawTexture(Texture texture, Rectangle box) {
+    DrawTexture(texture, box.Left, box.Top, box.Width, box.Height);
+  }
+
   void DrawTexture(Texture texture, int left, int top, int width, int height) {
     SetVertices(left, top, width, height);
     GL.BufferData(BufferTarget.ArrayBuffer, vertices.Length * sizeof(float), vertices, BufferUsageHint.DynamicDraw);
@@ -325,6 +329,10 @@ public class Game : GameWindow {
     GL.DrawElements(PrimitiveType.Triangles, indices.Length, DrawElementsType.UnsignedInt, 0);
   }
 
+  void DrawBox(Rectangle box, int thickness) {
+    DrawBox(box.Left, box.Top, box.Width, box.Height, thickness);
+  }
+
   void DrawBox(int left, int top, int width, int height, int thickness) {
     DrawTexture(TEXTURE_WHITE, left, top, width, thickness);
     DrawTexture(TEXTURE_WHITE, left, top, thickness, height);