/**************************************************************************/ /* editor_resource_preview.h */ /**************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /**************************************************************************/ /* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */ /* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /**************************************************************************/ #ifndef EDITOR_RESOURCE_PREVIEW_H #define EDITOR_RESOURCE_PREVIEW_H #include "core/os/semaphore.h" #include "core/os/thread.h" #include "core/templates/safe_refcount.h" #include "scene/main/node.h" #include "scene/resources/texture.h" class EditorResourcePreviewGenerator : public RefCounted { GDCLASS(EditorResourcePreviewGenerator, RefCounted); protected: static void _bind_methods(); GDVIRTUAL1RC(bool, _handles, String) GDVIRTUAL2RC(Ref<Texture2D>, _generate, Ref<Resource>, Vector2i) GDVIRTUAL2RC(Ref<Texture2D>, _generate_from_path, String, Vector2i) GDVIRTUAL0RC(bool, _generate_small_preview_automatically) GDVIRTUAL0RC(bool, _can_generate_small_preview) public: virtual bool handles(const String &p_type) const; virtual Ref<Texture2D> generate(const Ref<Resource> &p_from, const Size2 &p_size) const; virtual Ref<Texture2D> generate_from_path(const String &p_path, const Size2 &p_size) const; virtual bool generate_small_preview_automatically() const; virtual bool can_generate_small_preview() const; EditorResourcePreviewGenerator(); }; class EditorResourcePreview : public Node { GDCLASS(EditorResourcePreview, Node); static EditorResourcePreview *singleton; struct QueueItem { Ref<Resource> resource; String path; ObjectID id; StringName function; Variant userdata; }; List<QueueItem> queue; Mutex preview_mutex; Semaphore preview_sem; Thread thread; SafeFlag exit; SafeFlag exited; struct Item { Ref<Texture2D> preview; Ref<Texture2D> small_preview; int order = 0; uint32_t last_hash = 0; uint64_t modified_time = 0; }; int order; HashMap<String, Item> cache; void _preview_ready(const String &p_str, const Ref<Texture2D> &p_texture, const Ref<Texture2D> &p_small_texture, ObjectID id, const StringName &p_func, const Variant &p_ud); void _generate_preview(Ref<ImageTexture> &r_texture, Ref<ImageTexture> &r_small_texture, const QueueItem &p_item, const String &cache_base); static void _thread_func(void *ud); void _thread(); void _iterate(); Vector<Ref<EditorResourcePreviewGenerator>> preview_generators; protected: static void _bind_methods(); public: static EditorResourcePreview *get_singleton(); // p_receiver_func callback has signature (String p_path, Ref<Texture2D> p_preview, Ref<Texture2D> p_preview_small, Variant p_userdata) // p_preview will be null if there was an error void queue_resource_preview(const String &p_path, Object *p_receiver, const StringName &p_receiver_func, const Variant &p_userdata); void queue_edited_resource_preview(const Ref<Resource> &p_res, Object *p_receiver, const StringName &p_receiver_func, const Variant &p_userdata); void add_preview_generator(const Ref<EditorResourcePreviewGenerator> &p_generator); void remove_preview_generator(const Ref<EditorResourcePreviewGenerator> &p_generator); void check_for_invalidation(const String &p_path); void start(); void stop(); EditorResourcePreview(); ~EditorResourcePreview(); }; #endif // EDITOR_RESOURCE_PREVIEW_H