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/* SPDX-License-Identifier: Apache-2.0
* Copyright 2022 NVIDIA Corporation
* Copyright 2022 Blender Foundation */
#include "hydra/session.h"
#include "scene/shader.h"
// Have to include shader.h before background.h so that 'set_shader' uses the correct 'set'
// overload taking a 'Node *', rather than the one taking a 'bool'
#include "scene/background.h"
#include "scene/light.h"
#include "scene/shader_graph.h"
#include "scene/shader_nodes.h"
#include "session/session.h"
HDCYCLES_NAMESPACE_OPEN_SCOPE
namespace {
const std::unordered_map<TfToken, PassType, TfToken::HashFunctor> kAovToPass = {
{HdAovTokens->color, PASS_COMBINED},
{HdAovTokens->depth, PASS_DEPTH},
{HdAovTokens->normal, PASS_NORMAL},
{HdAovTokens->primId, PASS_OBJECT_ID},
{HdAovTokens->instanceId, PASS_AOV_VALUE},
};
} // namespace
SceneLock::SceneLock(const HdRenderParam *renderParam)
: scene(static_cast<const HdCyclesSession *>(renderParam)->session->scene),
sceneLock(scene->mutex)
{
}
SceneLock::~SceneLock()
{
}
HdCyclesSession::HdCyclesSession(Session *session_) : session(session_), _ownCyclesSession(false)
{
}
HdCyclesSession::HdCyclesSession(const SessionParams ¶ms)
: session(new Session(params, SceneParams())), _ownCyclesSession(true)
{
Scene *const scene = session->scene;
// Create background with ambient light
{
ShaderGraph *graph = new ShaderGraph();
BackgroundNode *bgNode = graph->create_node<BackgroundNode>();
bgNode->set_color(one_float3());
graph->add(bgNode);
graph->connect(bgNode->output("Background"), graph->output()->input("Surface"));
scene->default_background->set_graph(graph);
scene->default_background->tag_update(scene);
}
// Wire up object color in default surface material
{
ShaderGraph *graph = new ShaderGraph();
ObjectInfoNode *objectNode = graph->create_node<ObjectInfoNode>();
graph->add(objectNode);
DiffuseBsdfNode *diffuseNode = graph->create_node<DiffuseBsdfNode>();
graph->add(diffuseNode);
graph->connect(objectNode->output("Color"), diffuseNode->input("Color"));
graph->connect(diffuseNode->output("BSDF"), graph->output()->input("Surface"));
#if 1
// Create the instanceId AOV output
const ustring instanceId(HdAovTokens->instanceId.GetString());
OutputAOVNode *aovNode = graph->create_node<OutputAOVNode>();
aovNode->set_name(instanceId);
graph->add(aovNode);
AttributeNode *instanceIdNode = graph->create_node<AttributeNode>();
instanceIdNode->set_attribute(instanceId);
graph->add(instanceIdNode);
graph->connect(instanceIdNode->output("Fac"), aovNode->input("Value"));
#endif
scene->default_surface->set_graph(graph);
scene->default_surface->tag_update(scene);
}
}
HdCyclesSession::~HdCyclesSession()
{
if (_ownCyclesSession) {
delete session;
}
}
void HdCyclesSession::UpdateScene()
{
Scene *const scene = session->scene;
// Update background depending on presence of a background light
if (scene->light_manager->need_update()) {
Light *background_light = nullptr;
for (Light *light : scene->lights) {
if (light->get_light_type() == LIGHT_BACKGROUND) {
background_light = light;
break;
}
}
if (!background_light) {
scene->background->set_shader(scene->default_background);
scene->background->set_transparent(true);
}
else {
scene->background->set_shader(background_light->get_shader());
scene->background->set_transparent(false);
}
scene->background->tag_update(scene);
}
}
void HdCyclesSession::SyncAovBindings(const HdRenderPassAovBindingVector &aovBindings)
{
Scene *const scene = session->scene;
// Delete all existing passes
scene->delete_nodes(set<Pass *>(scene->passes.begin(), scene->passes.end()));
// Update passes with requested AOV bindings
_aovBindings = aovBindings;
for (const HdRenderPassAovBinding &aovBinding : aovBindings) {
const auto cyclesAov = kAovToPass.find(aovBinding.aovName);
if (cyclesAov == kAovToPass.end()) {
// TODO: Use PASS_AOV_COLOR and PASS_AOV_VALUE for these?
TF_WARN("Unknown pass %s", aovBinding.aovName.GetText());
continue;
}
const PassType type = cyclesAov->second;
const PassMode mode = PassMode::DENOISED;
Pass *pass = scene->create_node<Pass>();
pass->set_type(type);
pass->set_mode(mode);
pass->set_name(ustring(aovBinding.aovName.GetString()));
}
}
void HdCyclesSession::RemoveAovBinding(HdRenderBuffer *renderBuffer)
{
for (HdRenderPassAovBinding &aovBinding : _aovBindings) {
if (renderBuffer == aovBinding.renderBuffer) {
aovBinding.renderBuffer = nullptr;
break;
}
}
if (renderBuffer == _displayAovBinding.renderBuffer) {
_displayAovBinding.renderBuffer = nullptr;
}
}
HDCYCLES_NAMESPACE_CLOSE_SCOPE
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