456 lines
16 KiB
C++
456 lines
16 KiB
C++
/*************************************************************************/
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/* editor_resource_preview.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "editor_resource_preview.h"
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#include "core/io/resource_loader.h"
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#include "core/io/resource_saver.h"
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#include "core/message_queue.h"
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#include "core/os/file_access.h"
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#include "core/project_settings.h"
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#include "editor_node.h"
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#include "editor_scale.h"
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#include "editor_settings.h"
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bool EditorResourcePreviewGenerator::handles(const String &p_type) const {
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if (get_script_instance() && get_script_instance()->has_method("handles")) {
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return get_script_instance()->call("handles", p_type);
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}
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ERR_FAIL_V_MSG(false, "EditorResourcePreviewGenerator::handles needs to be overridden.");
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}
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Ref<Texture2D> EditorResourcePreviewGenerator::generate(const RES &p_from, const Size2 &p_size) const {
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if (get_script_instance() && get_script_instance()->has_method("generate")) {
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return get_script_instance()->call("generate", p_from, p_size);
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}
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ERR_FAIL_V_MSG(Ref<Texture2D>(), "EditorResourcePreviewGenerator::generate needs to be overridden.");
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}
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Ref<Texture2D> EditorResourcePreviewGenerator::generate_from_path(const String &p_path, const Size2 &p_size) const {
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if (get_script_instance() && get_script_instance()->has_method("generate_from_path")) {
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return get_script_instance()->call("generate_from_path", p_path, p_size);
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}
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RES res = ResourceLoader::load(p_path);
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if (!res.is_valid()) {
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return res;
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}
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return generate(res, p_size);
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}
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bool EditorResourcePreviewGenerator::generate_small_preview_automatically() const {
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if (get_script_instance() && get_script_instance()->has_method("generate_small_preview_automatically")) {
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return get_script_instance()->call("generate_small_preview_automatically");
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}
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return false;
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}
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bool EditorResourcePreviewGenerator::can_generate_small_preview() const {
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if (get_script_instance() && get_script_instance()->has_method("can_generate_small_preview")) {
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return get_script_instance()->call("can_generate_small_preview");
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}
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return false;
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}
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void EditorResourcePreviewGenerator::_bind_methods() {
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ClassDB::add_virtual_method(get_class_static(), MethodInfo(Variant::BOOL, "handles", PropertyInfo(Variant::STRING, "type")));
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ClassDB::add_virtual_method(get_class_static(), MethodInfo(CLASS_INFO(Texture2D), "generate", PropertyInfo(Variant::OBJECT, "from", PROPERTY_HINT_RESOURCE_TYPE, "Resource"), PropertyInfo(Variant::VECTOR2, "size")));
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ClassDB::add_virtual_method(get_class_static(), MethodInfo(CLASS_INFO(Texture2D), "generate_from_path", PropertyInfo(Variant::STRING, "path", PROPERTY_HINT_FILE), PropertyInfo(Variant::VECTOR2, "size")));
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ClassDB::add_virtual_method(get_class_static(), MethodInfo(Variant::BOOL, "generate_small_preview_automatically"));
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ClassDB::add_virtual_method(get_class_static(), MethodInfo(Variant::BOOL, "can_generate_small_preview"));
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}
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EditorResourcePreviewGenerator::EditorResourcePreviewGenerator() {
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}
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EditorResourcePreview *EditorResourcePreview::singleton = nullptr;
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void EditorResourcePreview::_thread_func(void *ud) {
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EditorResourcePreview *erp = (EditorResourcePreview *)ud;
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erp->_thread();
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}
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void EditorResourcePreview::_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) {
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String path = p_str;
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{
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MutexLock lock(preview_mutex);
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uint32_t hash = 0;
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uint64_t modified_time = 0;
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if (p_str.begins_with("ID:")) {
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hash = uint32_t(p_str.get_slicec(':', 2).to_int());
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path = "ID:" + p_str.get_slicec(':', 1);
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} else {
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modified_time = FileAccess::get_modified_time(path);
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}
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Item item;
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item.order = order++;
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item.preview = p_texture;
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item.small_preview = p_small_texture;
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item.last_hash = hash;
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item.modified_time = modified_time;
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cache[path] = item;
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}
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MessageQueue::get_singleton()->push_call(id, p_func, path, p_texture, p_small_texture, p_ud);
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}
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void EditorResourcePreview::_generate_preview(Ref<ImageTexture> &r_texture, Ref<ImageTexture> &r_small_texture, const QueueItem &p_item, const String &cache_base) {
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String type;
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if (p_item.resource.is_valid()) {
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type = p_item.resource->get_class();
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} else {
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type = ResourceLoader::get_resource_type(p_item.path);
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}
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if (type == "") {
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r_texture = Ref<ImageTexture>();
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r_small_texture = Ref<ImageTexture>();
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return; //could not guess type
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}
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int thumbnail_size = EditorSettings::get_singleton()->get("filesystem/file_dialog/thumbnail_size");
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thumbnail_size *= EDSCALE;
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r_texture = Ref<ImageTexture>();
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r_small_texture = Ref<ImageTexture>();
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for (int i = 0; i < preview_generators.size(); i++) {
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if (!preview_generators[i]->handles(type)) {
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continue;
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}
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Ref<Texture2D> generated;
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if (p_item.resource.is_valid()) {
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generated = preview_generators[i]->generate(p_item.resource, Vector2(thumbnail_size, thumbnail_size));
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} else {
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generated = preview_generators[i]->generate_from_path(p_item.path, Vector2(thumbnail_size, thumbnail_size));
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}
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r_texture = generated;
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int small_thumbnail_size = EditorNode::get_singleton()->get_theme_base()->get_theme_icon("Object", "EditorIcons")->get_width(); // Kind of a workaround to retrieve the default icon size
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if (preview_generators[i]->can_generate_small_preview()) {
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Ref<Texture2D> generated_small;
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if (p_item.resource.is_valid()) {
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generated_small = preview_generators[i]->generate(p_item.resource, Vector2(small_thumbnail_size, small_thumbnail_size));
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} else {
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generated_small = preview_generators[i]->generate_from_path(p_item.path, Vector2(small_thumbnail_size, small_thumbnail_size));
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}
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r_small_texture = generated_small;
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}
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if (!r_small_texture.is_valid() && r_texture.is_valid() && preview_generators[i]->generate_small_preview_automatically()) {
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Ref<Image> small_image = r_texture->get_data();
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small_image = small_image->duplicate();
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small_image->resize(small_thumbnail_size, small_thumbnail_size, Image::INTERPOLATE_CUBIC);
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r_small_texture.instance();
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r_small_texture->create_from_image(small_image);
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}
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break;
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}
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if (!p_item.resource.is_valid()) {
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// cache the preview in case it's a resource on disk
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if (r_texture.is_valid()) {
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//wow it generated a preview... save cache
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bool has_small_texture = r_small_texture.is_valid();
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ResourceSaver::save(cache_base + ".png", r_texture);
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if (has_small_texture) {
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ResourceSaver::save(cache_base + "_small.png", r_small_texture);
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}
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FileAccess *f = FileAccess::open(cache_base + ".txt", FileAccess::WRITE);
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ERR_FAIL_COND_MSG(!f, "Cannot create file '" + cache_base + ".txt'. Check user write permissions.");
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f->store_line(itos(thumbnail_size));
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f->store_line(itos(has_small_texture));
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f->store_line(itos(FileAccess::get_modified_time(p_item.path)));
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f->store_line(FileAccess::get_md5(p_item.path));
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f->close();
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memdelete(f);
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}
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}
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}
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void EditorResourcePreview::_thread() {
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exited = false;
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while (!exit) {
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preview_sem.wait();
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preview_mutex.lock();
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if (queue.size()) {
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QueueItem item = queue.front()->get();
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queue.pop_front();
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if (cache.has(item.path)) {
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//already has it because someone loaded it, just let it know it's ready
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String path = item.path;
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if (item.resource.is_valid()) {
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path += ":" + itos(cache[item.path].last_hash); //keep last hash (see description of what this is in condition below)
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}
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_preview_ready(path, cache[item.path].preview, cache[item.path].small_preview, item.id, item.function, item.userdata);
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preview_mutex.unlock();
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} else {
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preview_mutex.unlock();
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Ref<ImageTexture> texture;
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Ref<ImageTexture> small_texture;
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int thumbnail_size = EditorSettings::get_singleton()->get("filesystem/file_dialog/thumbnail_size");
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thumbnail_size *= EDSCALE;
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if (item.resource.is_valid()) {
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_generate_preview(texture, small_texture, item, String());
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//adding hash to the end of path (should be ID:<objid>:<hash>) because of 5 argument limit to call_deferred
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_preview_ready(item.path + ":" + itos(item.resource->hash_edited_version()), texture, small_texture, item.id, item.function, item.userdata);
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} else {
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String temp_path = EditorSettings::get_singleton()->get_cache_dir();
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String cache_base = ProjectSettings::get_singleton()->globalize_path(item.path).md5_text();
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cache_base = temp_path.plus_file("resthumb-" + cache_base);
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//does not have it, try to load a cached thumbnail
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String file = cache_base + ".txt";
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FileAccess *f = FileAccess::open(file, FileAccess::READ);
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if (!f) {
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// No cache found, generate
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_generate_preview(texture, small_texture, item, cache_base);
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} else {
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uint64_t modtime = FileAccess::get_modified_time(item.path);
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int tsize = f->get_line().to_int();
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bool has_small_texture = f->get_line().to_int();
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uint64_t last_modtime = f->get_line().to_int();
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bool cache_valid = true;
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if (tsize != thumbnail_size) {
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cache_valid = false;
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memdelete(f);
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} else if (last_modtime != modtime) {
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String last_md5 = f->get_line();
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String md5 = FileAccess::get_md5(item.path);
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memdelete(f);
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if (last_md5 != md5) {
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cache_valid = false;
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} else {
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//update modified time
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f = FileAccess::open(file, FileAccess::WRITE);
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if (!f) {
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// Not returning as this would leave the thread hanging and would require
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// some proper cleanup/disabling of resource preview generation.
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ERR_PRINT("Cannot create file '" + file + "'. Check user write permissions.");
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} else {
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f->store_line(itos(thumbnail_size));
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f->store_line(itos(has_small_texture));
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f->store_line(itos(modtime));
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f->store_line(md5);
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memdelete(f);
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}
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}
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} else {
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memdelete(f);
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}
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if (cache_valid) {
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Ref<Image> img;
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img.instance();
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Ref<Image> small_img;
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small_img.instance();
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if (img->load(cache_base + ".png") != OK) {
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cache_valid = false;
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} else {
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texture.instance();
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texture->create_from_image(img);
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if (has_small_texture) {
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if (small_img->load(cache_base + "_small.png") != OK) {
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cache_valid = false;
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} else {
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small_texture.instance();
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small_texture->create_from_image(small_img);
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}
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}
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}
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}
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if (!cache_valid) {
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_generate_preview(texture, small_texture, item, cache_base);
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}
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}
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_preview_ready(item.path, texture, small_texture, item.id, item.function, item.userdata);
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}
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}
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} else {
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preview_mutex.unlock();
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}
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}
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exited = true;
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}
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void EditorResourcePreview::queue_edited_resource_preview(const Ref<Resource> &p_res, Object *p_receiver, const StringName &p_receiver_func, const Variant &p_userdata) {
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ERR_FAIL_NULL(p_receiver);
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ERR_FAIL_COND(!p_res.is_valid());
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{
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MutexLock lock(preview_mutex);
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String path_id = "ID:" + itos(p_res->get_instance_id());
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if (cache.has(path_id) && cache[path_id].last_hash == p_res->hash_edited_version()) {
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cache[path_id].order = order++;
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p_receiver->call(p_receiver_func, path_id, cache[path_id].preview, cache[path_id].small_preview, p_userdata);
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return;
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}
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cache.erase(path_id); //erase if exists, since it will be regen
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QueueItem item;
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item.function = p_receiver_func;
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item.id = p_receiver->get_instance_id();
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item.resource = p_res;
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item.path = path_id;
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item.userdata = p_userdata;
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queue.push_back(item);
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}
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preview_sem.post();
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}
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void EditorResourcePreview::queue_resource_preview(const String &p_path, Object *p_receiver, const StringName &p_receiver_func, const Variant &p_userdata) {
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ERR_FAIL_NULL(p_receiver);
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{
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MutexLock lock(preview_mutex);
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if (cache.has(p_path)) {
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cache[p_path].order = order++;
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p_receiver->call(p_receiver_func, p_path, cache[p_path].preview, cache[p_path].small_preview, p_userdata);
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return;
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}
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QueueItem item;
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item.function = p_receiver_func;
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item.id = p_receiver->get_instance_id();
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item.path = p_path;
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item.userdata = p_userdata;
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queue.push_back(item);
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}
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preview_sem.post();
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}
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void EditorResourcePreview::add_preview_generator(const Ref<EditorResourcePreviewGenerator> &p_generator) {
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preview_generators.push_back(p_generator);
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}
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void EditorResourcePreview::remove_preview_generator(const Ref<EditorResourcePreviewGenerator> &p_generator) {
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preview_generators.erase(p_generator);
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}
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EditorResourcePreview *EditorResourcePreview::get_singleton() {
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return singleton;
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}
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void EditorResourcePreview::_bind_methods() {
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ClassDB::bind_method("_preview_ready", &EditorResourcePreview::_preview_ready);
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ClassDB::bind_method(D_METHOD("queue_resource_preview", "path", "receiver", "receiver_func", "userdata"), &EditorResourcePreview::queue_resource_preview);
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ClassDB::bind_method(D_METHOD("queue_edited_resource_preview", "resource", "receiver", "receiver_func", "userdata"), &EditorResourcePreview::queue_edited_resource_preview);
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ClassDB::bind_method(D_METHOD("add_preview_generator", "generator"), &EditorResourcePreview::add_preview_generator);
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ClassDB::bind_method(D_METHOD("remove_preview_generator", "generator"), &EditorResourcePreview::remove_preview_generator);
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ClassDB::bind_method(D_METHOD("check_for_invalidation", "path"), &EditorResourcePreview::check_for_invalidation);
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ADD_SIGNAL(MethodInfo("preview_invalidated", PropertyInfo(Variant::STRING, "path")));
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}
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void EditorResourcePreview::check_for_invalidation(const String &p_path) {
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bool call_invalidated = false;
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{
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MutexLock lock(preview_mutex);
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if (cache.has(p_path)) {
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uint64_t modified_time = FileAccess::get_modified_time(p_path);
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if (modified_time != cache[p_path].modified_time) {
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cache.erase(p_path);
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call_invalidated = true;
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}
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}
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}
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if (call_invalidated) { //do outside mutex
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call_deferred("emit_signal", "preview_invalidated", p_path);
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}
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}
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void EditorResourcePreview::start() {
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ERR_FAIL_COND_MSG(thread, "Thread already started.");
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thread = Thread::create(_thread_func, this);
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}
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void EditorResourcePreview::stop() {
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if (thread) {
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exit = true;
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preview_sem.post();
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while (!exited) {
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OS::get_singleton()->delay_usec(10000);
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RenderingServer::get_singleton()->sync(); //sync pending stuff, as thread may be blocked on visual server
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}
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Thread::wait_to_finish(thread);
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memdelete(thread);
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thread = nullptr;
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}
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}
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EditorResourcePreview::EditorResourcePreview() {
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thread = nullptr;
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singleton = this;
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order = 0;
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exit = false;
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exited = false;
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}
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EditorResourcePreview::~EditorResourcePreview() {
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stop();
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}
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