diff --git a/Photo.cs b/Photo.cs
index e25db1e..f6a9c0b 100644
--- a/Photo.cs
+++ b/Photo.cs
@@ -8,7 +8,6 @@ using System.Xml.Linq;
 
 namespace SemiColinGames;
 
-
 public class Photo {
   public string Filename;
   public bool Loaded = false;
diff --git a/Program.cs b/Program.cs
index a4e94ed..404d889 100644
--- a/Program.cs
+++ b/Program.cs
@@ -11,11 +11,9 @@ using SixLabors.ImageSharp.Drawing;
 using SixLabors.ImageSharp.Formats.Jpeg;
 using System;
 using System.Diagnostics;
-using System.Runtime.CompilerServices;
 
 namespace SemiColinGames;
 
-
 public class FpsCounter {
   private readonly int[] frameTimes = new int[30];
   private double fps = 0;
@@ -209,57 +207,6 @@ public class CropTool : ITool {
 }
 
 
-public class Texture : IDisposable {
-  public int Handle;
-  public Vector2i Size;
-
-  private static int maxHandle = -1;
-  private bool disposedValue = false;
-
-  public Texture(Image<Rgba32> image) {
-    Size = new Vector2i(image.Width, image.Height);
-    byte[] pixelBytes = new byte[Size.X * Size.Y * Unsafe.SizeOf<Rgba32>()];
-    image.CopyPixelDataTo(pixelBytes);
-
-    Handle = GL.GenTexture();
-    if (Handle > maxHandle) {
-      // Console.WriteLine("GL.GenTexture #" + Handle);
-      maxHandle = Handle;
-    }
-    GL.ActiveTexture(TextureUnit.Texture0);
-    GL.BindTexture(TextureTarget.Texture2D, Handle);
-    GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, Size.X, Size.Y, 0, PixelFormat.Rgba, PixelType.UnsignedByte, pixelBytes);
-    //GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int) TextureMinFilter.LinearMipmapLinear);
-    GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int) TextureMinFilter.Linear);
-    GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int) TextureMagFilter.Nearest);
-    GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int) TextureWrapMode.ClampToBorder);
-    GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int) TextureWrapMode.ClampToBorder);
-    float[] borderColor = { 0.0f, 0.0f, 0.0f, 1.0f };
-    GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureBorderColor, borderColor);
-    // FIXME: should we use mipmaps?
-    //GL.GenerateMipmap(GenerateMipmapTarget.Texture2D);
-  }
-
-  protected virtual void Dispose(bool disposing) {
-    if (!disposedValue) {
-      GL.DeleteTexture(Handle);
-      disposedValue = true;
-    }
-  }
-
-  ~Texture() {
-    if (!disposedValue) {
-      Console.WriteLine("~Texture(): resource leak? Dispose() should be called manually.");
-    }
-  }
-
-  public void Dispose() {
-    Dispose(true);
-    GC.SuppressFinalize(this);
-  }
-}
-
-
 public class UiGeometry {
   public static Vector2i MIN_WINDOW_SIZE = new(1024, 768);
 
@@ -805,7 +752,8 @@ public class Game : GameWindow {
 
     Vector2i renderSize = (Vector2i) (((Vector2) active.Size) * scale);
     Vector2i center = (Vector2i) geometry.PhotoBox.Center;
-    Box2i photoBox = Util.MakeBox(center.X - renderSize.X / 2, center.Y - renderSize.Y / 2, renderSize.X, renderSize.Y);
+    Box2i photoBox = Util.MakeBox(center.X - renderSize.X / 2, center.Y - renderSize.Y / 2,
+                                  renderSize.X, renderSize.Y);
     activeOffset = new(photoBox.Min.X, photoBox.Min.Y);
     transform = new Transform(activeScale, activeOffset, activePhoto.Size);
     DrawTexture(active, photoBox);
@@ -817,7 +765,8 @@ public class Game : GameWindow {
     DrawCropRectangle(cropActive);
 
     // Draw thumbnail boxes.
-    ribbonIndex = Math.Clamp(photoIndex - (geometry.ThumbnailBoxes.Count - 1) / 2, 0, Math.Max(0, photos.Count - geometry.ThumbnailBoxes.Count));
+    ribbonIndex = Math.Clamp(photoIndex - (geometry.ThumbnailBoxes.Count - 1) / 2,
+                             0, Math.Max(0, photos.Count - geometry.ThumbnailBoxes.Count));
     DrawFilledBox(geometry.ThumbnailBox, Color4.Black);
     for (int i = 0; i < geometry.ThumbnailBoxes.Count; i++) {
       if (ribbonIndex + i >= photos.Count) {
diff --git a/Texture.cs b/Texture.cs
new file mode 100644
index 0000000..8f9094d
--- /dev/null
+++ b/Texture.cs
@@ -0,0 +1,55 @@
+using OpenTK.Graphics.OpenGL4;
+using OpenTK.Mathematics;
+using System.Runtime.CompilerServices;
+
+namespace SemiColinGames;
+
+public class Texture : IDisposable {
+  public int Handle;
+  public Vector2i Size;
+
+  private static int maxHandle = -1;
+  private bool disposedValue = false;
+
+  public Texture(Image<Rgba32> image) {
+    Size = new Vector2i(image.Width, image.Height);
+    byte[] pixelBytes = new byte[Size.X * Size.Y * Unsafe.SizeOf<Rgba32>()];
+    image.CopyPixelDataTo(pixelBytes);
+
+    Handle = GL.GenTexture();
+    if (Handle > maxHandle) {
+      // Console.WriteLine("GL.GenTexture #" + Handle);
+      maxHandle = Handle;
+    }
+    GL.ActiveTexture(TextureUnit.Texture0);
+    GL.BindTexture(TextureTarget.Texture2D, Handle);
+    GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, Size.X, Size.Y, 0, PixelFormat.Rgba, PixelType.UnsignedByte, pixelBytes);
+    //GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int) TextureMinFilter.LinearMipmapLinear);
+    GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int) TextureMinFilter.Linear);
+    GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int) TextureMagFilter.Nearest);
+    GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int) TextureWrapMode.ClampToBorder);
+    GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int) TextureWrapMode.ClampToBorder);
+    float[] borderColor = { 0.0f, 0.0f, 0.0f, 1.0f };
+    GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureBorderColor, borderColor);
+    // FIXME: should we use mipmaps?
+    //GL.GenerateMipmap(GenerateMipmapTarget.Texture2D);
+  }
+
+  protected virtual void Dispose(bool disposing) {
+    if (!disposedValue) {
+      GL.DeleteTexture(Handle);
+      disposedValue = true;
+    }
+  }
+
+  ~Texture() {
+    if (!disposedValue) {
+      Console.WriteLine("~Texture(): resource leak? Dispose() should be called manually.");
+    }
+  }
+
+  public void Dispose() {
+    Dispose(true);
+    GC.SuppressFinalize(this);
+  }
+}