/* GStreamer
 * Copyright (C) 2023 Seungha Yang <seungha@centricular.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "gstd3d12pluginutils.h"

GType
gst_d3d12_sampling_method_get_type (void)
{
  static GType type = 0;
  static const GEnumValue methods[] = {
    {GST_D3D12_SAMPLING_METHOD_NEAREST,
        "Nearest Neighbour", "nearest-neighbour"},
    {GST_D3D12_SAMPLING_METHOD_BILINEAR,
        "Bilinear", "bilinear"},
    {GST_D3D12_SAMPLING_METHOD_LINEAR_MINIFICATION,
        "Linear minification, point magnification", "linear-minification"},
    {GST_D3D12_SAMPLING_METHOD_ANISOTROPIC, "Anisotropic", "anisotropic"},
    {0, nullptr, nullptr},
  };

  GST_D3D12_CALL_ONCE_BEGIN {
    type = g_enum_register_static ("GstD3D12SamplingMethod", methods);
  } GST_D3D12_CALL_ONCE_END;

  return type;
}

struct SamplingMethodMap
{
  GstD3D12SamplingMethod method;
  D3D12_FILTER filter;
};

static const SamplingMethodMap sampling_method_map[] = {
  {GST_D3D12_SAMPLING_METHOD_NEAREST, D3D12_FILTER_MIN_MAG_MIP_POINT},
  {GST_D3D12_SAMPLING_METHOD_BILINEAR, D3D12_FILTER_MIN_MAG_LINEAR_MIP_POINT},
  {GST_D3D12_SAMPLING_METHOD_LINEAR_MINIFICATION,
      D3D12_FILTER_MIN_LINEAR_MAG_MIP_POINT},
  {GST_D3D12_SAMPLING_METHOD_ANISOTROPIC, D3D12_FILTER_ANISOTROPIC},
};

D3D12_FILTER
gst_d3d12_sampling_method_to_native (GstD3D12SamplingMethod method)
{
  for (guint i = 0; i < G_N_ELEMENTS (sampling_method_map); i++) {
    if (sampling_method_map[i].method == method)
      return sampling_method_map[i].filter;
  }

  return D3D12_FILTER_MIN_MAG_MIP_POINT;
}