loaderFileType.cxx

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/**
 * PANDA 3D SOFTWARE
 * Copyright (c) Carnegie Mellon University.  All rights reserved.
 *
 * All use of this software is subject to the terms of the revised BSD
 * license.  You should have received a copy of this license along
 * with this source code in a file named "LICENSE."
 *
 * @file loaderFileType.cxx
 * @author drose
 * @date 2000-06-20
 */

#include "loaderFileType.h"
#include "loaderOptions.h"
#include "config_pgraph.h"


TypeHandle LoaderFileType::_type_handle;

/**
 *
 */
LoaderFileType::
LoaderFileType() {
  // Derived LoaderFileType classes that return a different result based on
  // the setting of certain LoaderOptions flags (like LF_convert_anim) should
  // set those bits in the following bitmask, so that we will not
  // inadvertently cache a model without respecting these flags.
  _no_cache_flags = 0;
}

/**
 *
 */
LoaderFileType::
~LoaderFileType() {
}

/**
 * Returns a space-separated list of extension, in addition to the one
 * returned by get_extension(), that are recognized by this loader.
 */
std::string LoaderFileType::
get_additional_extensions() const {
  return std::string();
}

/**
 * Returns true if this file type can transparently load compressed files
 * (with a .pz or .gz extension), false otherwise.
 */
bool LoaderFileType::
supports_compressed() const {
  return false;
}

/**
 * Returns true if the loader flags allow retrieving the model from the on-
 * disk bam cache (if it is enabled), false otherwise.
 */
bool LoaderFileType::
get_allow_disk_cache(const LoaderOptions &options) const {
  return (options.get_flags() & (LoaderOptions::LF_no_disk_cache | _no_cache_flags)) == 0;
}

/**
 * Returns true if the loader flags allow retrieving the model from the in-
 * memory ModelPool cache, false otherwise.
 */
bool LoaderFileType::
get_allow_ram_cache(const LoaderOptions &options) const {
  return (options.get_flags() & (LoaderOptions::LF_no_ram_cache | _no_cache_flags)) == 0;
}

/**
 * Returns true if the file type can be used to load files, and load_file() is
 * supported.  Returns false if load_file() is unimplemented and will always
 * fail.
 */
bool LoaderFileType::
supports_load() const {
  return true;
}

/**
 * Returns true if the file type can be used to save files, and save_file() is
 * supported.  Returns false if save_file() is unimplemented and will always
 * fail.
 */
bool LoaderFileType::
supports_save() const {
  return false;
}

/**
 *
 */
PT(PandaNode) LoaderFileType::
load_file(const Filename &path, const LoaderOptions &options,
          BamCacheRecord *record) const {
  loader_cat.error()
    << get_type() << " cannot read PandaNode objects.\n";
  return nullptr;
}

/**
 *
 */
bool LoaderFileType::
save_file(const Filename &path, const LoaderOptions &options,
          PandaNode *node) const {
  loader_cat.error()
    << get_type() << " cannot save PandaNode objects.\n";
  return false;
}