439 lines
13 KiB
C++
439 lines
13 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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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
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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 "editor_settings.h"
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#include "os/file_access.h"
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#include "io/resource_loader.h"
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#include "io/resource_saver.h"
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#include "globals.h"
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#include "editor_scale.h"
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#include "message_queue.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_EXPLAIN("EditorResourcePreviewGenerator::handles needs to be overriden");
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ERR_FAIL_V(false);
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}
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Ref<Texture> EditorResourcePreviewGenerator::generate(const RES& p_from){
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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);
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}
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ERR_EXPLAIN("EditorResourcePreviewGenerator::generate needs to be overriden");
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ERR_FAIL_V(Ref<Texture>());
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}
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Ref<Texture> EditorResourcePreviewGenerator::generate_from_path(const String& p_path) {
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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);
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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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return generate(res);
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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(Variant::OBJECT,"generate:Texture",PropertyInfo(Variant::OBJECT,"from",PROPERTY_HINT_RESOURCE_TYPE,"Resource")));
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ClassDB::add_virtual_method(get_class_static(),MethodInfo(Variant::OBJECT,"generate_from_path:Texture",PropertyInfo(Variant::STRING,"path",PROPERTY_HINT_FILE)));
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}
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EditorResourcePreviewGenerator::EditorResourcePreviewGenerator() {
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}
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EditorResourcePreview* EditorResourcePreview::singleton=NULL;
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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<Texture>& p_texture,ObjectID id,const StringName& p_func,const Variant& p_ud) {
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//print_line("preview is ready");
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preview_mutex->lock();
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String path = p_str;
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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=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.last_hash=hash;
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item.modified_time=modified_time;
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cache[path]=item;
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preview_mutex->unlock();
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MessageQueue::get_singleton()->push_call(id,p_func,path,p_texture,p_ud);
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}
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Ref<Texture> EditorResourcePreview::_generate_preview(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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//print_line("resource type is: "+type);
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if (type=="")
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return Ref<Texture>(); //could not guess type
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Ref<Texture> generated;
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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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if (p_item.resource.is_valid()) {
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generated = preview_generators[i]->generate(p_item.resource);
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} else {
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generated = preview_generators[i]->generate_from_path(p_item.path);
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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 (generated.is_valid()) {
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//print_line("was generated");
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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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//wow it generated a preview... save cache
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ResourceSaver::save(cache_base+".png",generated);
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FileAccess *f=FileAccess::open(cache_base+".txt",FileAccess::WRITE);
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f->store_line(itos(thumbnail_size));
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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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memdelete(f);
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} else {
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//print_line("was not generated");
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}
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}
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return generated;
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}
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void EditorResourcePreview::_thread() {
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//print_line("begin thread");
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while(!exit) {
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//print_line("wait for semaphore");
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preview_sem->wait();
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preview_mutex->lock();
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//print_line("blue team go");
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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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if (item.resource.is_valid()) {
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item.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(item.path,cache[item.path].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<Texture> texture;
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//print_line("pop from queue "+item.path);
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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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texture=_generate_preview(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,item.id,item.function,item.userdata);
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} else {
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String temp_path=EditorSettings::get_singleton()->get_settings_path().plus_file("tmp");
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String cache_base = GlobalConfig::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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//print_line("cachetxt at "+file);
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FileAccess *f=FileAccess::open(file,FileAccess::READ);
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if (!f) {
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//print_line("generate because not cached");
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//generate
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texture=_generate_preview(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_int64();
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uint64_t last_modtime = f->get_line().to_int64();
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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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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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} else {
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memdelete(f);
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}
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cache_valid=false;
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if (cache_valid) {
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texture = ResourceLoader::load(cache_base+".png","ImageTexture",true);
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if (!texture.is_valid()) {
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//well fuck
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cache_valid=false;
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}
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}
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if (!cache_valid) {
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texture=_generate_preview(item,cache_base);
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}
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}
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//print_line("notify of preview ready");
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_preview_ready(item.path,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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}
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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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preview_mutex->lock();
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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_deferred(p_receiver_func,path_id,cache[path_id].preview,p_userdata);
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preview_mutex->unlock();
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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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//print_line("send to thread "+p_path);
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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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preview_mutex->unlock();
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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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preview_mutex->lock();
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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_deferred(p_receiver_func,p_path,cache[p_path].preview,p_userdata);
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preview_mutex->unlock();
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return;
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}
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//print_line("send to thread "+p_path);
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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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preview_mutex->unlock();
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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:Variant"),&EditorResourcePreview::queue_resource_preview);
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ClassDB::bind_method(D_METHOD("queue_edited_resource_preview","resource:Resource","receiver","receiver_func","userdata:Variant"),&EditorResourcePreview::queue_edited_resource_preview);
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ClassDB::bind_method(D_METHOD("add_preview_generator","generator:EditorResourcePreviewGenerator"),&EditorResourcePreview::add_preview_generator);
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ClassDB::bind_method(D_METHOD("remove_preview_generator","generator:EditorResourcePreviewGenerator"),&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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preview_mutex->lock();
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bool call_invalidated=false;
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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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preview_mutex->unlock();
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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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EditorResourcePreview::EditorResourcePreview() {
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singleton=this;
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preview_mutex = Mutex::create();
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preview_sem = Semaphore::create();
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order=0;
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exit=false;
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thread = Thread::create(_thread_func,this);
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}
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EditorResourcePreview::~EditorResourcePreview()
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{
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exit=true;
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preview_sem->post();
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Thread::wait_to_finish(thread);
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memdelete(thread);
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memdelete(preview_mutex);
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memdelete(preview_sem);
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}
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