Add slide export functionality

Editor/Inspectors/SlideDeckEditor.cs

@@ -4,6 +4,7 @@
 using UnityEditorInternal;
 using System;
 using Unity.Presentation.Utils;
+using UnityEditor.Callbacks;
 
 namespace Unity.Presentation.Inspectors
 {
@@ -220,11 +221,27 @@ public override void OnInspectorGUI()
             if (GUILayout.Button("Load This Slide Deck"))
             {
                 Engine.Instance.LoadDeck(instance);
+                EditorWindow.GetWindow<PresentationWindow>();
             }
 
             scroll = DrawInspector(instance, scroll);
         }
 
+        [OnOpenAsset(1)]
+        public static bool step1(int instanceID, int line)
+        {
+            SlideDeck deck = EditorUtility.InstanceIDToObject(instanceID) as SlideDeck;
+
+            if (deck)
+            {
+                Engine.Instance.LoadDeck(deck);
+                EditorWindow.GetWindow<PresentationWindow>();
+                return true;
+            }
+
+            return false;
+        }
+
 #endregion
     }
 }

Editor/PresentationWindow.cs

@@ -1,10 +1,8 @@
 using UnityEngine;
 using UnityEditor;
-using UnityEditorInternal;
-using System.Collections.Generic;
 using UnityEditor.SceneManagement;
 using UnityEngine.SceneManagement;
-using System;
+using System.IO;
 using Unity.Presentation.Inspectors;
 using Unity.Presentation.Utils;
 
@@ -35,6 +33,7 @@ private class Styles
             public readonly GUIContent TEXT_LOAD = new GUIContent("Load", "Load Presentation from disk");
             public readonly GUIContent TEXT_SAVE = new GUIContent("Save", "Save Presentation to disk");
             public readonly GUIContent TEXT_BUILD = new GUIContent("Build", "Build Standalone Presentation for selected platform");
+            public readonly GUIContent TEXT_EXPORT = new GUIContent("Exprt", "Export all slides to png image files");
             public readonly GUIContent TEXT_PREV = new GUIContent("<<", "Go to the previous slide");
             public readonly GUIContent TEXT_FROM_BEGINNING = new GUIContent("> B", "Start Presentation from the first slide");
             public readonly GUIContent TEXT_STOP = new GUIContent("Stop", "Stop Presentation");
@@ -154,6 +153,7 @@ private void OnGUI()
             else
             {
                 var shouldBuild = false;
+                var shouldExport = false;
                 var bgcolor = GUI.backgroundColor;
                 var deck = engine.SlideDeck;
 
@@ -175,6 +175,10 @@ private void OnGUI()
                 {
                     shouldBuild = true;
                 }
+                if (GUILayout.Button(styles.TEXT_EXPORT, styles.BUTTON))
+                {
+                    shouldExport = true;
+                }
                 GUI.enabled = true;
 
                 GUILayout.Label(GUIContent.none, GUILayout.ExpandWidth(true));
@@ -215,6 +219,50 @@ private void OnGUI()
                 {
                     EditorUtils.BuildPresentation(deck);
                 }
+
+                if (shouldExport)
+                {
+                    EditorSceneManager.SaveCurrentModifiedScenesIfUserWantsTo();
+                    var activeScene = SceneManager.GetActiveScene().path;
+
+                    string exportFolder =
+                        EditorUtility.OpenFolderPanel("Choose folder for export", Application.dataPath, "Exports");
+
+                    if (!string.IsNullOrEmpty(exportFolder))
+                    {
+                        RenderTexture renderTexture = RenderTexture.GetTemporary(1920, 1080, 32, RenderTextureFormat.ARGB32);
+
+                        for (var i = 0; i < deck.Slides.Count; i++)
+                        {
+                            var slide = deck.Slides[i];
+                            EditorSceneManager.OpenScene(slide.ScenePath);
+
+                            var sceneCam = Camera.main;
+                            sceneCam.targetTexture = renderTexture;
+
+                            RenderTexture.active = renderTexture;
+                            sceneCam.Render();
+
+                            var exportTexture = new Texture2D(renderTexture.width, renderTexture.height);
+                            exportTexture.ReadPixels(new Rect(0, 0, renderTexture.width, renderTexture.height), 0, 0);
+
+                            var slidePath =
+                                string.Format("{0}/{1} - {2}.png", exportFolder, i + 1,
+                                    Path.GetFileNameWithoutExtension(slide.ScenePath));
+
+                            File.WriteAllBytes(slidePath,
+                                exportTexture.EncodeToPNG());
+
+                            RenderTexture.active = null;
+                            Object.DestroyImmediate(exportTexture);
+                        }
+
+                        RenderTexture.ReleaseTemporary(renderTexture);
+
+                        if(!string.IsNullOrEmpty(activeScene))
+                            EditorSceneManager.OpenScene(activeScene);
+                    }
+                }
             }
         }
 

README.md

@@ -18,6 +18,7 @@ This project allows you to build a full presentation in Unity and never leave it
 1. Use Unity UI to design slides.
 1. Make interactive slides (there are examples in the sample presentation).
 1. Even load whole games as slides!
+1. Export slides to .png files
 1. ... and more!
 
 ## Getting started
@@ -55,7 +56,6 @@ If you check the demo Slide Deck you will see that slide scenes all have the sam
 
 ## TODO
 1. Proper fullscreen.
-1. Some way to export slides to more common formats (PNGs, PDF, PPT) when one is unable to run Unity during a presentation.
 1. Better slide list interface.
 
 ## Known issues