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/*
* Copyright 2021 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 "integrator/path_trace_tile.h"
#include "integrator/pass_accessor_cpu.h"
#include "integrator/path_trace.h"
#include "render/buffers.h"
#include "render/film.h"
#include "render/pass.h"
#include "render/scene.h"
CCL_NAMESPACE_BEGIN
PathTraceTile::PathTraceTile(PathTrace &path_trace)
: OutputDriver::Tile(path_trace.get_render_tile_offset(),
path_trace.get_render_tile_size(),
path_trace.get_render_size(),
path_trace.get_render_tile_params().layer,
path_trace.get_render_tile_params().view),
path_trace_(path_trace),
copied_from_device_(false)
{
}
bool PathTraceTile::get_pass_pixels(const string_view pass_name,
const int num_channels,
float *pixels) const
{
/* NOTE: The code relies on a fact that session is fully update and no scene/buffer modification
* is happening while this function runs. */
if (!copied_from_device_) {
/* Copy from device on demand. */
path_trace_.copy_render_tile_from_device();
const_cast<PathTraceTile *>(this)->copied_from_device_ = true;
}
const BufferParams &buffer_params = path_trace_.get_render_tile_params();
const BufferPass *pass = buffer_params.find_pass(pass_name);
if (pass == nullptr) {
return false;
}
const bool has_denoised_result = path_trace_.has_denoised_result();
if (pass->mode == PassMode::DENOISED && !has_denoised_result) {
pass = buffer_params.find_pass(pass->type);
if (pass == nullptr) {
/* Happens when denoised result pass is requested but is never written by the kernel. */
return false;
}
}
pass = buffer_params.get_actual_display_pass(pass);
const float exposure = buffer_params.exposure;
const int num_samples = path_trace_.get_num_render_tile_samples();
PassAccessor::PassAccessInfo pass_access_info(*pass);
pass_access_info.use_approximate_shadow_catcher = buffer_params.use_approximate_shadow_catcher;
pass_access_info.use_approximate_shadow_catcher_background =
pass_access_info.use_approximate_shadow_catcher && !buffer_params.use_transparent_background;
const PassAccessorCPU pass_accessor(pass_access_info, exposure, num_samples);
const PassAccessor::Destination destination(pixels, num_channels);
return path_trace_.get_render_tile_pixels(pass_accessor, destination);
}
bool PathTraceTile::set_pass_pixels(const string_view pass_name,
const int num_channels,
const float *pixels) const
{
/* NOTE: The code relies on a fact that session is fully update and no scene/buffer modification
* is happening while this function runs. */
const BufferParams &buffer_params = path_trace_.get_render_tile_params();
const BufferPass *pass = buffer_params.find_pass(pass_name);
if (!pass) {
return false;
}
const float exposure = buffer_params.exposure;
const int num_samples = 1;
const PassAccessor::PassAccessInfo pass_access_info(*pass);
PassAccessorCPU pass_accessor(pass_access_info, exposure, num_samples);
PassAccessor::Source source(pixels, num_channels);
return path_trace_.set_render_tile_pixels(pass_accessor, source);
}
CCL_NAMESPACE_END
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