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/*
* Copyright 2011-2015 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.
*/
#include "../kernel_compat_opencl.h"
#include "../kernel_math.h"
#include "../kernel_types.h"
#include "../kernel_globals.h"
/* Since we process various samples in parallel; The output radiance of different samples
* are stored in different locations; This kernel combines the output radiance contributed
* by all different samples and stores them in the RenderTile's output buffer.
*/
ccl_device void kernel_sum_all_radiance(
ccl_constant KernelData *data, /* To get pass_stride to offet into buffer */
ccl_global float *buffer, /* Output buffer of RenderTile */
ccl_global float *per_sample_output_buffer, /* Radiance contributed by all samples */
int parallel_samples, int sw, int sh, int stride,
int buffer_offset_x,
int buffer_offset_y,
int buffer_stride,
int start_sample)
{
int x = get_global_id(0);
int y = get_global_id(1);
if(x < sw && y < sh) {
buffer += ((buffer_offset_x + x) + (buffer_offset_y + y) * buffer_stride) * (data->film.pass_stride);
per_sample_output_buffer += ((x + y * stride) * parallel_samples) * (data->film.pass_stride);
int sample_stride = (data->film.pass_stride);
int sample_iterator = 0;
int pass_stride_iterator = 0;
int num_floats = data->film.pass_stride;
for(sample_iterator = 0; sample_iterator < parallel_samples; sample_iterator++) {
for(pass_stride_iterator = 0; pass_stride_iterator < num_floats; pass_stride_iterator++) {
*(buffer + pass_stride_iterator) =
(start_sample == 0 && sample_iterator == 0)
? *(per_sample_output_buffer + pass_stride_iterator)
: *(buffer + pass_stride_iterator) + *(per_sample_output_buffer + pass_stride_iterator);
}
per_sample_output_buffer += sample_stride;
}
}
}
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