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/*
* Copyright 2011-2017 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
#define ccl_get_feature(buffer, pass) (buffer)[(pass)*pass_stride]
/* Loop over the pixels in the range [low.x, high.x) x [low.y, high.y).
* pixel_buffer always points to the current pixel in the first pass. */
#define FOR_PIXEL_WINDOW pixel_buffer = buffer + (low.y - rect.y)*buffer_w + (low.x - rect.x); \
for(pixel.y = low.y; pixel.y < high.y; pixel.y++) { \
for(pixel.x = low.x; pixel.x < high.x; pixel.x++, pixel_buffer++) {
#define END_FOR_PIXEL_WINDOW } \
pixel_buffer += buffer_w - (high.x - low.x); \
}
ccl_device_inline void filter_get_features(int2 pixel,
const ccl_global float *ccl_restrict buffer,
float *features,
const float *ccl_restrict mean,
int pass_stride)
{
features[0] = pixel.x;
features[1] = pixel.y;
features[2] = fabsf(ccl_get_feature(buffer, 0));
features[3] = ccl_get_feature(buffer, 1);
features[4] = ccl_get_feature(buffer, 2);
features[5] = ccl_get_feature(buffer, 3);
features[6] = ccl_get_feature(buffer, 4);
features[7] = ccl_get_feature(buffer, 5);
features[8] = ccl_get_feature(buffer, 6);
features[9] = ccl_get_feature(buffer, 7);
if(mean) {
for(int i = 0; i < DENOISE_FEATURES; i++)
features[i] -= mean[i];
}
}
ccl_device_inline void filter_get_feature_scales(int2 pixel,
const ccl_global float *ccl_restrict buffer,
float *scales,
const float *ccl_restrict mean,
int pass_stride)
{
scales[0] = fabsf(pixel.x - mean[0]);
scales[1] = fabsf(pixel.y - mean[1]);
scales[2] = fabsf(fabsf(ccl_get_feature(buffer, 0)) - mean[2]);
scales[3] = len_squared(make_float3(ccl_get_feature(buffer, 1) - mean[3],
ccl_get_feature(buffer, 2) - mean[4],
ccl_get_feature(buffer, 3) - mean[5]));
scales[4] = fabsf(ccl_get_feature(buffer, 4) - mean[6]);
scales[5] = len_squared(make_float3(ccl_get_feature(buffer, 5) - mean[7],
ccl_get_feature(buffer, 6) - mean[8],
ccl_get_feature(buffer, 7) - mean[9]));
}
ccl_device_inline void filter_calculate_scale(float *scale)
{
scale[0] = 1.0f/max(scale[0], 0.01f);
scale[1] = 1.0f/max(scale[1], 0.01f);
scale[2] = 1.0f/max(scale[2], 0.01f);
scale[6] = 1.0f/max(scale[4], 0.01f);
scale[7] = scale[8] = scale[9] = 1.0f/max(sqrtf(scale[5]), 0.01f);
scale[3] = scale[4] = scale[5] = 1.0f/max(sqrtf(scale[3]), 0.01f);
}
ccl_device_inline float3 filter_get_color(const ccl_global float *ccl_restrict buffer,
int pass_stride)
{
return make_float3(ccl_get_feature(buffer, 8), ccl_get_feature(buffer, 9), ccl_get_feature(buffer, 10));
}
ccl_device_inline void design_row_add(float *design_row,
int rank,
const ccl_global float *ccl_restrict transform,
int stride,
int row,
float feature)
{
for(int i = 0; i < rank; i++) {
design_row[1+i] += transform[(row*DENOISE_FEATURES + i)*stride]*feature;
}
}
/* Fill the design row. */
ccl_device_inline void filter_get_design_row_transform(int2 p_pixel,
const ccl_global float *ccl_restrict p_buffer,
int2 q_pixel,
const ccl_global float *ccl_restrict q_buffer,
int pass_stride,
int rank,
float *design_row,
const ccl_global float *ccl_restrict transform,
int stride)
{
design_row[0] = 1.0f;
math_vector_zero(design_row+1, rank);
design_row_add(design_row, rank, transform, stride, 0, q_pixel.x - p_pixel.x);
design_row_add(design_row, rank, transform, stride, 1, q_pixel.y - p_pixel.y);
design_row_add(design_row, rank, transform, stride, 2, fabsf(ccl_get_feature(q_buffer, 0)) - fabsf(ccl_get_feature(p_buffer, 0)));
design_row_add(design_row, rank, transform, stride, 3, ccl_get_feature(q_buffer, 1) - ccl_get_feature(p_buffer, 1));
design_row_add(design_row, rank, transform, stride, 4, ccl_get_feature(q_buffer, 2) - ccl_get_feature(p_buffer, 2));
design_row_add(design_row, rank, transform, stride, 5, ccl_get_feature(q_buffer, 3) - ccl_get_feature(p_buffer, 3));
design_row_add(design_row, rank, transform, stride, 6, ccl_get_feature(q_buffer, 4) - ccl_get_feature(p_buffer, 4));
design_row_add(design_row, rank, transform, stride, 7, ccl_get_feature(q_buffer, 5) - ccl_get_feature(p_buffer, 5));
design_row_add(design_row, rank, transform, stride, 8, ccl_get_feature(q_buffer, 6) - ccl_get_feature(p_buffer, 6));
design_row_add(design_row, rank, transform, stride, 9, ccl_get_feature(q_buffer, 7) - ccl_get_feature(p_buffer, 7));
}
CCL_NAMESPACE_END
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