/**
 * 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 imageResize.I
 * @author drose
 * @date 2003-03-13
 */

/**
 *
 */
INLINE ImageResize::SizeRequest::
SizeRequest() {
  _type = RT_none;
}

/**
 * Returns the type of the size request, or RT_none if the request has not
 * been specified.
 */
INLINE ImageResize::RequestType ImageResize::SizeRequest::
get_type() const {
  return _type;
}

/**
 * Sets the size request to store an explicit pixel size.
 */
INLINE void ImageResize::SizeRequest::
set_pixel_size(int pixel_size) {
  _type = RT_pixel_size;
  _e._pixel_size = pixel_size;
}

/**
 * Returns the explicit pixel size stored within the size request.
 */
INLINE int ImageResize::SizeRequest::
get_pixel_size() const {
  nassertr(_type == RT_pixel_size, 0);
  return _e._pixel_size;
}

/**
 * Returns the explicit pixel size stored within the size request, or if a
 * ratio has been stored, returns the computed pixel size based on the
 * original size.
 */
INLINE int ImageResize::SizeRequest::
get_pixel_size(int orig_pixel_size) const {
  switch (_type) {
  case RT_pixel_size:
    return _e._pixel_size;
  case RT_ratio:
    return (int)(_e._ratio * orig_pixel_size + 0.5);
  default:
    return orig_pixel_size;
  }
}

/**
 * Sets the size request to store a specific ratio.
 */
INLINE void ImageResize::SizeRequest::
set_ratio(double ratio) {
  _type = RT_ratio;
  _e._ratio = ratio;
}

/**
 * Returns the specific ratio stored within the size request.
 */
INLINE double ImageResize::SizeRequest::
get_ratio() const {
  nassertr(_type == RT_ratio, 0);
  return _e._ratio;
}

/**
 * Returns the specific ratio stored within the size request, or if a pixel
 * size has been stored, returns the computed ratio based on the original
 * size.
 */
INLINE double ImageResize::SizeRequest::
get_ratio(int orig_pixel_size) const {
  switch (_type) {
  case RT_ratio:
    return _e._ratio;
  case RT_pixel_size:
    return (double)_e._pixel_size / (double)orig_pixel_size;
  default:
    return 1.0;
  }
}