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| 1 | +// reference image viewer from external folder |
| 2 | + |
| 3 | +using UnityEngine; |
| 4 | +using UnityEditor; |
| 5 | +using System.IO; |
| 6 | + |
| 7 | +namespace UnityLibrary.Tools |
| 8 | +{ |
| 9 | + public class ReferenceImageViewer2 : EditorWindow |
| 10 | + { |
| 11 | + private const string EditorPrefsKey = "ReferenceImageViewer_ImagePath"; |
| 12 | + |
| 13 | + [SerializeField] |
| 14 | + private string imagePath = ""; |
| 15 | + [SerializeField] |
| 16 | + private Texture2D loadedImage; |
| 17 | + |
| 18 | + [MenuItem("Window/Reference Image Viewer")] |
| 19 | + public static void ShowWindow() |
| 20 | + { |
| 21 | + GetWindow<ReferenceImageViewer2>("Reference Image Viewer"); |
| 22 | + } |
| 23 | + |
| 24 | + private void OnEnable() |
| 25 | + { |
| 26 | + // Delay the reload to ensure Unity's layout system is ready |
| 27 | + EditorApplication.delayCall += TryLoadImage; |
| 28 | + } |
| 29 | + |
| 30 | + private void OnDisable() |
| 31 | + { |
| 32 | + if (!string.IsNullOrEmpty(imagePath)) |
| 33 | + EditorPrefs.SetString(EditorPrefsKey, imagePath); |
| 34 | + else |
| 35 | + EditorPrefs.DeleteKey(EditorPrefsKey); |
| 36 | + } |
| 37 | + |
| 38 | + private void TryLoadImage() |
| 39 | + { |
| 40 | + imagePath = EditorPrefs.GetString(EditorPrefsKey, ""); |
| 41 | + if (!string.IsNullOrEmpty(imagePath) && File.Exists(imagePath)) |
| 42 | + { |
| 43 | + LoadImageFromPath(imagePath); |
| 44 | + Repaint(); // Ensure it's drawn |
| 45 | + } |
| 46 | + } |
| 47 | + |
| 48 | + void OnGUI() |
| 49 | + { |
| 50 | + GUILayout.Label("Reference Image Viewer", EditorStyles.boldLabel); |
| 51 | + |
| 52 | + if (GUILayout.Button("Browse for Image")) |
| 53 | + { |
| 54 | + string path = EditorUtility.OpenFilePanel("Select Image", "", "png,jpg,jpeg"); |
| 55 | + if (!string.IsNullOrEmpty(path)) |
| 56 | + { |
| 57 | + imagePath = path; |
| 58 | + EditorPrefs.SetString(EditorPrefsKey, imagePath); |
| 59 | + LoadImageFromPath(imagePath); |
| 60 | + } |
| 61 | + } |
| 62 | + |
| 63 | + // Fallback in case delayCall missed |
| 64 | + if (loadedImage == null && !string.IsNullOrEmpty(imagePath) && File.Exists(imagePath)) |
| 65 | + { |
| 66 | + LoadImageFromPath(imagePath); |
| 67 | + Repaint(); |
| 68 | + } |
| 69 | + |
| 70 | + if (loadedImage != null) |
| 71 | + { |
| 72 | + GUILayout.Space(10); |
| 73 | + |
| 74 | + float windowWidth = position.width - 20; |
| 75 | + float imageAspect = (float)loadedImage.width / loadedImage.height; |
| 76 | + |
| 77 | + float displayWidth = windowWidth; |
| 78 | + float displayHeight = windowWidth / imageAspect; |
| 79 | + |
| 80 | + if (displayHeight > position.height - 100) |
| 81 | + { |
| 82 | + displayHeight = position.height - 100; |
| 83 | + displayWidth = displayHeight * imageAspect; |
| 84 | + } |
| 85 | + |
| 86 | + Rect imageRect = GUILayoutUtility.GetRect(displayWidth, displayHeight, GUILayout.ExpandWidth(false), GUILayout.ExpandHeight(false)); |
| 87 | + EditorGUI.DrawPreviewTexture(imageRect, loadedImage, null, ScaleMode.ScaleToFit); |
| 88 | + } |
| 89 | + } |
| 90 | + |
| 91 | + private void LoadImageFromPath(string path) |
| 92 | + { |
| 93 | + try |
| 94 | + { |
| 95 | + byte[] fileData = File.ReadAllBytes(path); |
| 96 | + loadedImage = new Texture2D(2, 2, TextureFormat.RGBA32, false); |
| 97 | + if (!loadedImage.LoadImage(fileData)) |
| 98 | + { |
| 99 | + Debug.LogError("Failed to load image."); |
| 100 | + loadedImage = null; |
| 101 | + } |
| 102 | + } |
| 103 | + catch (System.Exception e) |
| 104 | + { |
| 105 | + Debug.LogError($"Could not load image from path: {path}\n{e.Message}"); |
| 106 | + loadedImage = null; |
| 107 | + } |
| 108 | + } |
| 109 | + } |
| 110 | +} |
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