load smaller main images by default

Photo.cs

@@ -47,19 +47,23 @@ public class Photo {
     ParseExif(info.Metadata.ExifProfile);
   }
 
-  public async void LoadAsync() {
+  public async void LoadAsync(Vector2i size) {
     // We don't assign to this.image until Load() is done, because we might
     // 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++;
-    Image<Rgba32> tmp = await Image.LoadAsync<Rgba32>(Filename);
+    // TODO: 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)
+    };
+    Image<Rgba32> tmp = await Image.LoadAsync<Rgba32>(options, Filename);
     Util.RotateImageFromExif(tmp, Orientation);
     image = tmp;
   }
 
-  public async void LoadThumbnailAsync() {
+  public async void LoadThumbnailAsync(Vector2i size) {
     DecoderOptions options = new DecoderOptions {
-      TargetSize = new Size(256, 256)
+      TargetSize = new Size(size.X, size.Y)
     };
     Image<Rgba32> tmp = await Image.LoadAsync<Rgba32>(options, Filename);
     Util.RotateImageFromExif(tmp, Orientation);
@@ -282,11 +286,6 @@ public class Photo {
 
   public Texture Texture() {
     LastTouch = touchCounter++;
-    if (thumbnailTexture == placeholder && thumbnail != null) {
-      thumbnailTexture = new(thumbnail);
-      thumbnail.Dispose();
-      thumbnail = null;
-    }
     if (texture == placeholder && image != null) {
       // The texture needs to be created on the GL thread, so we instantiate
       // it here (since this is called from OnRenderFrame), as long as the
@@ -299,6 +298,15 @@ public class Photo {
     return texture != placeholder ? texture : thumbnailTexture;
   }
 
+  public Texture ThumbnailTexture() {
+    if (thumbnailTexture == placeholder && thumbnail != null) {
+      thumbnailTexture = new(thumbnail);
+      thumbnail.Dispose();
+      thumbnail = null;
+    }
+    return thumbnailTexture;
+  }
+
   public string Description() {
     string date = DateTimeOriginal.ToString("yyyy-MM-dd HH:mm:ss");
     return String.Format(

Program.cs

@@ -211,6 +211,7 @@ public class UiGeometry {
   public static Vector2i MIN_WINDOW_SIZE = new(1024, 768);
 
   public readonly Vector2i WindowSize;
+  public readonly Vector2i ThumbnailSize;
   public readonly Box2i ThumbnailBox;
   public readonly List<Box2i> ThumbnailBoxes = new();
   public readonly List<Box2i> StarBoxes = new();
@@ -225,6 +226,7 @@ public class UiGeometry {
     int numThumbnails = Math.Max(WindowSize.Y / 100, 1);
     int thumbnailHeight = WindowSize.Y / numThumbnails;
     int thumbnailWidth = (int) (1.0 * thumbnailHeight * CameraInfo.AspectRatio);
+    ThumbnailSize = new(thumbnailWidth, thumbnailHeight);
 
     Console.WriteLine($"thumbnail size: {thumbnailWidth}x{thumbnailHeight}");
     for (int i = 0; i < numThumbnails; i++) {
@@ -352,6 +354,7 @@ public class Game : GameWindow {
   public Game(GameWindowSettings gwSettings, NativeWindowSettings nwSettings) :
       base(gwSettings, nwSettings) {
     activeTool = viewTool;
+    geometry = new UiGeometry(nwSettings.Size, STAR_FILLED.Size.X);
   }
 
   private static string outputRoot = @"c:\users\colin\desktop\totte-output";
@@ -363,7 +366,7 @@ public class Game : GameWindow {
   private static Texture STAR_EMPTY = Util.RenderStar(20, false);
   private static Texture STAR_SMALL = Util.RenderStar(6, true);
 
-  UiGeometry geometry = new();
+  UiGeometry geometry;
   FpsCounter fpsCounter = new();
 
   // Four points, each consisting of (x, y, z, tex_x, tex_y).
@@ -717,13 +720,13 @@ public class Game : GameWindow {
       }
     }
     foreach (Photo p in toLoad) {
-      await Task.Run( () => { p.LoadAsync(); });
+      await Task.Run( () => { p.LoadAsync(geometry.PhotoBox.Size); });
     }
   }
 
   private async void LoadThumbnailsAsync() {
     foreach (Photo p in allPhotos) {
-      await Task.Run( () => { p.LoadThumbnailAsync(); });
+      await Task.Run( () => { p.LoadThumbnailAsync(geometry.ThumbnailSize); });
     }
   }
 
@@ -799,7 +802,7 @@ public class Game : GameWindow {
       }
       Photo photo = photos[ribbonIndex + i];
       Box2i box = geometry.ThumbnailBoxes[i];
-      DrawTexture(photo.Texture(), box);
+      DrawTexture(photo.ThumbnailTexture(), box);
       for (int j = 0; j < photo.Rating; j++) {
         DrawTexture(STAR_SMALL, box.Min.X + 8 + ((STAR_SMALL.Size.X + 2) * j), box.Min.Y + 8);
       }