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#include "editor_resource_preview.h"
#include "editor_settings.h"
#include "os/file_access.h"
#include "io/resource_loader.h"
#include "io/resource_saver.h"
#include "globals.h"
Ref<Texture> EditorResourcePreviewGenerator::generate_from_path(const String& p_path) {
RES res = ResourceLoader::load(p_path);
if (!res.is_valid())
return res;
return generate(res);
}
EditorResourcePreviewGenerator::EditorResourcePreviewGenerator() {
}
EditorResourcePreview* EditorResourcePreview::singleton=NULL;
void EditorResourcePreview::_thread_func(void *ud) {
EditorResourcePreview *erp=(EditorResourcePreview*)ud;
erp->_thread();
}
void EditorResourcePreview::_preview_ready(const String& p_str,const Ref<Texture>& p_texture,ObjectID id,const StringName& p_func,const Variant& p_ud) {
//print_line("preview is ready");
preview_mutex->lock();
Item item;
item.order=order++;
item.preview=p_texture;
cache[p_str]=item;
Object *recv = ObjectDB::get_instance(id);
if (recv) {
recv->call_deferred(p_func,p_str,p_texture,p_ud);
}
preview_mutex->unlock();
}
Ref<Texture> EditorResourcePreview::_generate_preview(const QueueItem& p_item,const String& cache_base) {
String type = ResourceLoader::get_resource_type(p_item.path);
//print_line("resource type is: "+type);
if (type=="")
return Ref<Texture>(); //could not guess type
Ref<Texture> generated;
for(int i=0;i<preview_generators.size();i++) {
if (!preview_generators[i]->handles(type))
continue;
generated = preview_generators[i]->generate_from_path(p_item.path);
break;
}
if (generated.is_valid()) {
//print_line("was generated");
int thumbnail_size = EditorSettings::get_singleton()->get("file_dialog/thumbnail_size");
//wow it generated a preview... save cache
ResourceSaver::save(cache_base+".png",generated);
FileAccess *f=FileAccess::open(cache_base+".txt",FileAccess::WRITE);
f->store_line(itos(thumbnail_size));
f->store_line(itos(FileAccess::get_modified_time(p_item.path)));
f->store_line(FileAccess::get_md5(p_item.path));
memdelete(f);
} else {
//print_line("was not generated");
}
return generated;
}
void EditorResourcePreview::_thread() {
//print_line("begin thread");
while(!exit) {
//print_line("wait for semaphore");
preview_sem->wait();
preview_mutex->lock();
//print_line("blue team go");
if (queue.size()) {
QueueItem item = queue.front()->get();
queue.pop_front();
preview_mutex->unlock();
Ref<Texture> texture;
//print_line("pop from queue "+item.path);
uint64_t modtime = FileAccess::get_modified_time(item.path);
int thumbnail_size = EditorSettings::get_singleton()->get("file_dialog/thumbnail_size");
if (cache.has(item.path)) {
//already has it because someone loaded it, just let it know it's ready
call_deferred("_preview_ready",item.path,cache[item.path].preview,item.id,item.function,item.userdata);
} else {
String temp_path=EditorSettings::get_singleton()->get_settings_path().plus_file("tmp");
String cache_base = Globals::get_singleton()->globalize_path(item.path).md5_text();
cache_base = temp_path.plus_file("resthumb-"+cache_base);
//does not have it, try to load a cached thumbnail
String file = cache_base+".txt";
//print_line("cachetxt at "+file);
FileAccess *f=FileAccess::open(file,FileAccess::READ);
if (!f) {
//print_line("generate because not cached");
//generate
texture=_generate_preview(item,cache_base);
} else {
int tsize = f->get_line().to_int64();
uint64_t last_modtime = f->get_line().to_int64();
bool cache_valid = true;
if (tsize!=thumbnail_size) {
cache_valid=false;
memdelete(f);
} else if (last_modtime!=modtime) {
String last_md5 = f->get_line();
String md5 = FileAccess::get_md5(item.path);
memdelete(f);
if (last_md5!=md5) {
cache_valid=false;
} else {
//update modified time
f=FileAccess::open(file,FileAccess::WRITE);
f->store_line(itos(modtime));
f->store_line(md5);
memdelete(f);
}
} else {
memdelete(f);
}
if (cache_valid) {
texture = ResourceLoader::load(cache_base+".png","ImageTexture",true);
if (!texture.is_valid()) {
//well fuck
cache_valid=false;
}
}
if (!cache_valid) {
texture=_generate_preview(item,cache_base);
}
}
//print_line("notify of preview ready");
call_deferred("_preview_ready",item.path,texture,item.id,item.function,item.userdata);
}
} else {
preview_mutex->unlock();
}
}
}
void EditorResourcePreview::queue_resource_preview(const String& p_path, Object* p_receiver, const StringName& p_receiver_func, const Variant& p_userdata) {
ERR_FAIL_NULL(p_receiver);
preview_mutex->lock();
if (cache.has(p_path)) {
cache[p_path].order=order++;
p_receiver->call_deferred(p_receiver_func,p_path,cache[p_path].preview,p_userdata);
preview_mutex->unlock();
return;
}
//print_line("send to thread "+p_path);
QueueItem item;
item.function=p_receiver_func;
item.id=p_receiver->get_instance_ID();
item.path=p_path;
item.userdata=p_userdata;
queue.push_back(item);
preview_mutex->unlock();
preview_sem->post();
}
void EditorResourcePreview::add_preview_generator(const Ref<EditorResourcePreviewGenerator>& p_generator) {
preview_generators.push_back(p_generator);
}
EditorResourcePreview* EditorResourcePreview::get_singleton() {
return singleton;
}
void EditorResourcePreview::_bind_methods() {
ObjectTypeDB::bind_method("_preview_ready",&EditorResourcePreview::_preview_ready);
}
EditorResourcePreview::EditorResourcePreview() {
singleton=this;
preview_mutex = Mutex::create();
preview_sem = Semaphore::create();
order=0;
exit=false;
thread = Thread::create(_thread_func,this);
}
EditorResourcePreview::~EditorResourcePreview()
{
exit=true;
preview_sem->post();
Thread::wait_to_finish(thread);
memdelete(thread);
memdelete(preview_mutex);
memdelete(preview_sem);
}
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