void EditorResourcePreview::_thread() {
while (!exit) {
preview_sem->wait();
preview_mutex->lock();
if (queue.size()) {
QueueItem item = queue.front()->get();
queue.pop_front();
if (cache.has(item.path)) {
//already has it because someone loaded it, just let it know it's ready
String path = item.path;
if (item.resource.is_valid()) {
path += ":" + itos(cache[item.path].last_hash); //keep last hash (see description of what this is in condition below)
}
_preview_ready(path, cache[item.path].preview, cache[item.path].small_preview, item.id, item.function, item.userdata);
preview_mutex->unlock();
} else {
preview_mutex->unlock();
Ref<ImageTexture> texture;
Ref<ImageTexture> small_texture;
int thumbnail_size = EditorSettings::get_singleton()->get("filesystem/file_dialog/thumbnail_size");
thumbnail_size *= EDSCALE;
if (item.resource.is_valid()) {
_generate_preview(texture, small_texture, item, String());
//adding hash to the end of path (should be ID:<objid>:<hash>) because of 5 argument limit to call_deferred
_preview_ready(item.path + ":" + itos(item.resource->hash_edited_version()), texture, small_texture, item.id, item.function, item.userdata);
} else {
String temp_path = EditorSettings::get_singleton()->get_cache_dir();
String cache_base = ProjectSettings::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";
FileAccess *f = FileAccess::open(file, FileAccess::READ);
if (!f) {
// No cache found, generate
_generate_preview(texture, small_texture, item, cache_base);
} else {
uint64_t modtime = FileAccess::get_modified_time(item.path);
int tsize = f->get_line().to_int64();
bool has_small_texture = f->get_line().to_int();
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(itos(has_small_texture));
f->store_line(md5);
memdelete(f);
}
} else {
memdelete(f);
}
if (cache_valid) {
Ref<Image> img;
img.instance();
Ref<Image> small_img;
small_img.instance();
if (img->load(cache_base + ".png") != OK) {
cache_valid = false;
} else {
texture.instance();
texture->create_from_image(img, Texture::FLAG_FILTER);
if (has_small_texture) {
if (small_img->load(cache_base + "_small.png") != OK) {
cache_valid = false;
} else {
small_texture.instance();
small_texture->create_from_image(small_img, Texture::FLAG_FILTER);
}
}
}
}
if (!cache_valid) {
_generate_preview(texture, small_texture, item, cache_base);
}
}
_preview_ready(item.path, texture, small_texture, item.id, item.function, item.userdata);
}
}
} else {
preview_mutex->unlock();
}
}
}
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();
if (cache.has(item.path)) {
//already has it because someone loaded it, just let it know it's ready
if (item.resource.is_valid()) {
item.path += ":" + itos(cache[item.path].last_hash); //keep last hash (see description of what this is in condition below)
}
_preview_ready(item.path, cache[item.path].preview, item.id, item.function, item.userdata);
preview_mutex->unlock();
} else {
preview_mutex->unlock();
Ref<Texture> texture;
//print_line("pop from queue "+item.path);
int thumbnail_size = EditorSettings::get_singleton()->get("file_dialog/thumbnail_size");
thumbnail_size *= EDSCALE;
if (item.resource.is_valid()) {
texture = _generate_preview(item, String());
//adding hash to the end of path (should be ID:<objid>:<hash>) because of 5 argument limit to call_deferred
_preview_ready(item.path + ":" + itos(item.resource->hash_edited_version()), texture, 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 {
uint64_t modtime = FileAccess::get_modified_time(item.path);
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 f**k
cache_valid = false;
}
}
if (!cache_valid) {
texture = _generate_preview(item, cache_base);
}
}
//print_line("notify of preview ready");
_preview_ready(item.path, texture, item.id, item.function, item.userdata);
}
}
} else {
preview_mutex->unlock();
}
}
}
