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/*
* Copyright 2018 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 "render/coverage.h"
#include "render/buffers.h"
#include "kernel/kernel_compat_cpu.h"
#include "kernel/kernel_types.h"
#include "kernel/split/kernel_split_data.h"
#include "kernel/kernel_globals.h"
#include "kernel/kernel_id_passes.h"
#include "util/util_map.h"
CCL_NAMESPACE_BEGIN
static bool crypomatte_comp(const pair<float, float> &i, const pair<float, float> j)
{
return i.first > j.first;
}
void Coverage::finalize()
{
int pass_offset = 0;
if (kernel_data.film.cryptomatte_passes & CRYPT_OBJECT) {
finalize_buffer(coverage_object, pass_offset);
pass_offset += kernel_data.film.cryptomatte_depth * 4;
}
if (kernel_data.film.cryptomatte_passes & CRYPT_MATERIAL) {
finalize_buffer(coverage_material, pass_offset);
pass_offset += kernel_data.film.cryptomatte_depth * 4;
}
if (kernel_data.film.cryptomatte_passes & CRYPT_ASSET) {
finalize_buffer(coverage_asset, pass_offset);
}
}
void Coverage::init_path_trace()
{
kg->coverage_object = kg->coverage_material = kg->coverage_asset = NULL;
if (kernel_data.film.cryptomatte_passes & CRYPT_ACCURATE) {
if (kernel_data.film.cryptomatte_passes & CRYPT_OBJECT) {
coverage_object.clear();
coverage_object.resize(tile.w * tile.h);
}
if (kernel_data.film.cryptomatte_passes & CRYPT_MATERIAL) {
coverage_material.clear();
coverage_material.resize(tile.w * tile.h);
}
if (kernel_data.film.cryptomatte_passes & CRYPT_ASSET) {
coverage_asset.clear();
coverage_asset.resize(tile.w * tile.h);
}
}
}
void Coverage::init_pixel(int x, int y)
{
if (kernel_data.film.cryptomatte_passes & CRYPT_ACCURATE) {
const int pixel_index = tile.w * (y - tile.y) + x - tile.x;
if (kernel_data.film.cryptomatte_passes & CRYPT_OBJECT) {
kg->coverage_object = &coverage_object[pixel_index];
}
if (kernel_data.film.cryptomatte_passes & CRYPT_MATERIAL) {
kg->coverage_material = &coverage_material[pixel_index];
}
if (kernel_data.film.cryptomatte_passes & CRYPT_ASSET) {
kg->coverage_asset = &coverage_asset[pixel_index];
}
}
}
void Coverage::finalize_buffer(vector<CoverageMap> &coverage, const int pass_offset)
{
if (kernel_data.film.cryptomatte_passes & CRYPT_ACCURATE) {
flatten_buffer(coverage, pass_offset);
}
else {
sort_buffer(pass_offset);
}
}
void Coverage::flatten_buffer(vector<CoverageMap> &coverage, const int pass_offset)
{
/* Sort the coverage map and write it to the output */
int pixel_index = 0;
int pass_stride = tile.buffers->params.get_passes_size();
for (int y = 0; y < tile.h; ++y) {
for (int x = 0; x < tile.w; ++x) {
const CoverageMap &pixel = coverage[pixel_index];
if (!pixel.empty()) {
/* buffer offset */
int index = x + y * tile.stride;
float *buffer = (float *)tile.buffer + index * pass_stride;
/* sort the cryptomatte pixel */
vector<pair<float, float>> sorted_pixel;
for (CoverageMap::const_iterator it = pixel.begin(); it != pixel.end(); ++it) {
sorted_pixel.push_back(std::make_pair(it->second, it->first));
}
sort(sorted_pixel.begin(), sorted_pixel.end(), crypomatte_comp);
int num_slots = 2 * (kernel_data.film.cryptomatte_depth);
if (sorted_pixel.size() > num_slots) {
float leftover = 0.0f;
for (vector<pair<float, float>>::iterator it = sorted_pixel.begin() + num_slots;
it != sorted_pixel.end();
++it) {
leftover += it->first;
}
sorted_pixel[num_slots - 1].first += leftover;
}
int limit = min(num_slots, sorted_pixel.size());
for (int i = 0; i < limit; ++i) {
kernel_write_id_slots(buffer + kernel_data.film.pass_cryptomatte + pass_offset,
2 * (kernel_data.film.cryptomatte_depth),
sorted_pixel[i].second,
sorted_pixel[i].first);
}
}
++pixel_index;
}
}
}
void Coverage::sort_buffer(const int pass_offset)
{
/* Sort the coverage map and write it to the output */
int pass_stride = tile.buffers->params.get_passes_size();
for (int y = 0; y < tile.h; ++y) {
for (int x = 0; x < tile.w; ++x) {
/* buffer offset */
int index = x + y * tile.stride;
float *buffer = (float *)tile.buffer + index * pass_stride;
kernel_sort_id_slots(buffer + kernel_data.film.pass_cryptomatte + pass_offset,
2 * (kernel_data.film.cryptomatte_depth));
}
}
}
CCL_NAMESPACE_END
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