1 files changed, 95 insertions, 0 deletions
diff --git a/tools/editor/editor_resource_preview.h b/tools/editor/editor_resource_preview.h
new file mode 100644
index 0000000000..f8b96eca22
--- /dev/null
+++ b/tools/editor/editor_resource_preview.h
@@ -0,0 +1,95 @@
+#ifndef EDITORRESOURCEPREVIEW_H
+#define EDITORRESOURCEPREVIEW_H
+
+#include "scene/main/node.h"
+#include "os/semaphore.h"
+#include "os/thread.h"
+#include "scene/resources/texture.h"
+
+/* make previews for:
+*packdscene
+-wav
+*image
+-mesh
+-font
+*script
+*material
+-shader
+-shader graph?
+-navigation mesh
+-collision?
+-occluder polygon
+-navigation polygon
+-tileset
+-curve and curve2D
+*/
+
+
+class EditorResourcePreviewGenerator : public Reference {
+
+	OBJ_TYPE(EditorResourcePreviewGenerator,Reference );
+
+public:
+
+	virtual bool handles(const String& p_type) const=0;
+	virtual Ref<Texture> generate(const RES& p_from)=0;
+	virtual Ref<Texture> generate_from_path(const String& p_path);
+
+	EditorResourcePreviewGenerator();
+};
+
+
+class EditorResourcePreview : public Node {
+
+	OBJ_TYPE(EditorResourcePreview,Node);
+
+
+	static EditorResourcePreview* singleton;
+
+	struct QueueItem {
+		String path;
+		ObjectID id;
+		StringName function;
+		Variant userdata;
+	};
+
+	List<QueueItem> queue;
+
+	Mutex *preview_mutex;
+	Semaphore *preview_sem;
+	Thread *thread;
+	bool exit;
+
+	struct Item {
+		Ref<Texture> preview;
+		int order;
+	};
+
+	int order;
+
+	Map<String,Item> cache;
+
+	void _preview_ready(const String& p_str,const Ref<Texture>& p_texture, ObjectID id, const StringName &p_func, const Variant &p_ud);
+	Ref<Texture> _generate_preview(const QueueItem& p_item, const String &cache_base);
+
+	static void _thread_func(void *ud);
+	void _thread();
+
+	Vector<Ref<EditorResourcePreviewGenerator> > preview_generators;
+protected:
+
+	static void _bind_methods();
+public:
+
+	static EditorResourcePreview* get_singleton();
+
+	//callback funtion is callback(String p_path,Ref<Texture> preview,Variant udata) preview null if could not load
+	void queue_resource_preview(const String& p_path, Object* p_receiver, const StringName& p_receiver_func, const Variant& p_userdata);
+
+	void add_preview_generator(const Ref<EditorResourcePreviewGenerator>& p_generator);
+
+	EditorResourcePreview();
+	~EditorResourcePreview();
+};
+
+#endif // EDITORRESOURCEPREVIEW_H