update some comments

Photo.cs

@@ -52,8 +52,7 @@ public class Photo {
     // edit the image due to rotation (etc) and don't want to try generating
     // a texture for it until that's already happened.
     LastTouch = touchCounter++;
-    // TODO: if we zoom in to more than the display size, actually load the whole image?
-    // TODO: now cropping is fucky.
+    // FIXME: if we zoom in to more than the display size, actually load the whole image?
     DecoderOptions options = new DecoderOptions {
       TargetSize = new Size(size.X, size.Y),
       SkipMetadata = true

Program.cs

@@ -276,9 +276,6 @@ public static class Util {
     if (orientation <= 1) {
       return;
     }
-    // FIXME: I'm not convinced that all of these are correct, especially the
-    // cases that involve flipping (because whether you're flipping before or
-    // after rotation matters.)
     var operations = new Dictionary<ushort, (RotateMode, FlipMode)> {
       { 2, (RotateMode.None, FlipMode.Horizontal) },
       { 3, (RotateMode.Rotate180, FlipMode.None) },
@@ -688,8 +685,6 @@ public class Game : GameWindow {
         if (earliest != null) {
           Console.WriteLine($"loadedImages.Count: {loadedImages.Count}, " +
                             $"evicting {earliest.Filename} @ {earliestTime}");
-          // TODO: we have to free textures on the GL thread, but could we do
-          // that async'ly to keep the UI responsive?
           earliest.Unload();
           loadedImages.Remove(earliest);
         }
@@ -770,6 +765,7 @@ public class Game : GameWindow {
     Texture active = activePhoto.Texture();
 
     // FIXME: make a function for scaling & centering one box on another.
+    // FIXME: cropping is fucky because activeScale is using the texture size, not the photo size.
     float scaleX = 1f * geometry.PhotoBox.Size.X / active.Size.X;
     float scaleY = 1f * geometry.PhotoBox.Size.Y / active.Size.Y;
     float scale = Math.Min(scaleX, scaleY);