/*
 * Copyright 2019 Blender Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

CCL_NAMESPACE_BEGIN

ccl_device void kernel_adaptive_stopping(KernelGlobals *kg)
{
  int pixel_index = ccl_global_id(1) * ccl_global_size(0) + ccl_global_id(0);
  if (pixel_index < kernel_split_params.tile.w * kernel_split_params.tile.h &&
      kernel_split_params.tile.start_sample + kernel_split_params.tile.num_samples >=
          kernel_data.integrator.adaptive_min_samples) {
    int x = kernel_split_params.tile.x + pixel_index % kernel_split_params.tile.w;
    int y = kernel_split_params.tile.y + pixel_index / kernel_split_params.tile.w;
    int buffer_offset = (kernel_split_params.tile.offset + x +
                         y * kernel_split_params.tile.stride) *
                        kernel_data.film.pass_stride;
    ccl_global float *buffer = kernel_split_params.tile.buffer + buffer_offset;
    kernel_do_adaptive_stopping(kg,
                                buffer,
                                kernel_split_params.tile.start_sample +
                                    kernel_split_params.tile.num_samples - 1);
  }
}
CCL_NAMESPACE_END