scripts/modules/bpy_hydra.py

@@ -31,6 +31,10 @@ class CustomHydraRenderEngine(HydraRenderEngine):
             'enableTinyPrimCulling': True,
             'maxLights': 8,
         }
+
+    def update_render_passes(self, scene, render_layer):
+        if render_layer.use_pass_z:
+            self.register_pass(scene, render_layer, 'Depth', 1, 'Z', 'VALUE')
 ```
 """
 
@@ -141,6 +145,10 @@ class HydraRenderEngine(bpy.types.RenderEngine):
 
         _bpy_hydra.engine_view_draw(self.engine_ptr, depsgraph.as_pointer(), context.as_pointer())
 
+    def update_render_passes(self, scene, render_layer):
+        """ Register supported AOVs for render. Must be overridden in child classes. """
+        pass
+
 
 def export_mtlx(material):
     """ Exports material to .mtlx file. It is called from Blender source code. """

source/blender/render/hydra/final_engine.cc

@@ -11,22 +11,28 @@
 #include "GPU_framebuffer.h"
 #include "GPU_texture.h"
 #include "PIL_time.h"
-
+#include "BLI_map.hh"
 #include "IMB_imbuf_types.h"
 
 #include "camera.h"
 #include "final_engine.h"
 
+PXR_NAMESPACE_OPEN_SCOPE
+TF_DEFINE_PRIVATE_TOKENS(tokens_, (worldCoordinate));
+PXR_NAMESPACE_CLOSE_SCOPE
+
 namespace blender::render::hydra {
 
 void FinalEngine::render(Depsgraph *depsgraph)
 {
   prepare_for_render(depsgraph);
-  render_task_delegate_->set_renderer_aov(pxr::HdAovTokens->color);
+
+  for (auto &it : render_images_) {
+    render_task_delegate_->set_renderer_aov(aovs_map_.lookup(it.first));
+  }
   
   engine_->Execute(render_index_.get(), &tasks_);
 
-  std::vector<float> &pixels = render_images_["Combined"];
   char elapsed_time[32];
   double time_begin = PIL_check_seconds_timer();
   float percent_done = 0.0;
@@ -47,12 +53,14 @@ void FinalEngine::render(Depsgraph *depsgraph)
     if (render_task_delegate_->is_converged()) {
       break;
     }
-
+    for (auto &it : render_images_) {
-    render_task_delegate_->get_renderer_aov_data(pxr::HdAovTokens->color, pixels.data());
+      render_task_delegate_->get_renderer_aov_data(aovs_map_.lookup(it.first), it.second.data());
+    }
     update_render_result();
   }
-
+  for (auto &it : render_images_) {
-  render_task_delegate_->get_renderer_aov_data(pxr::HdAovTokens->color, pixels.data());
+    render_task_delegate_->get_renderer_aov_data(aovs_map_.lookup(it.first), it.second.data());
+  }
   update_render_result();
 }
 
@@ -111,11 +119,25 @@ void FinalEngine::prepare_for_render(Depsgraph *depsgraph)
         free_camera_delegate_->GetCameraId(), pxr::GfVec4d(0, 0, resolution_[0], resolution_[1]));
     tasks_ = light_tasks_delegate_->get_tasks();
   }
-  tasks_.push_back(render_task_delegate_->get_task());
+  for (auto &task : render_task_delegate_->get_tasks()) {
+    tasks_.push_back(task);
+  }
 
-  render_images_.emplace(
+  aovs_map_.add_new("Combined", pxr::HdAovTokens->color);
-      "Combined",
+  aovs_map_.add_new("Depth", pxr::HdAovTokens->depth);
-      std::vector<float>(resolution_[0] * resolution_[1] * 4)); /* 4 - number of channels. */
+
+  if ((bl_engine_->type->flag & RE_USE_GPU_CONTEXT) == 0) {
+    aovs_map_.add_new("Normal", pxr::HdAovTokens->normal);
+    aovs_map_.add_new("Position", pxr::tokens_->worldCoordinate);
+  }
+
+  RenderResult *result = RE_engine_get_result(bl_engine_);
+  RenderLayer *layer = (RenderLayer *)result->layers.first;
+  for (RenderPass *pass = (RenderPass *)layer->passes.first; pass != nullptr; pass = pass->next) {
+    if (aovs_map_.lookup_key_ptr(pass->name)) {
+      render_images_.emplace(pass->name, std::vector<float>(pass->rectx * pass->recty * pass->channels));
+    }
+  }
 }
 
 void FinalEngineGPU::render(Depsgraph *depsgraph)
@@ -134,7 +156,7 @@ void FinalEngineGPU::render(Depsgraph *depsgraph)
                                                 resolution_[0],
                                                 resolution_[1],
                                                 1,
-                                                GPU_DEPTH32F_STENCIL8,
+                                                GPU_DEPTH_COMPONENT32F,
                                                 GPU_TEXTURE_USAGE_GENERAL,
                                                 nullptr);
   GPU_texture_filter_mode(tex_color, true);
@@ -159,10 +181,10 @@ void FinalEngineGPU::render(Depsgraph *depsgraph)
 
   engine_->Execute(render_index_.get(), &tasks_);
 
-  std::vector<float> &pixels = render_images_["Combined"];
   char elapsed_time[32];
   double time_begin = PIL_check_seconds_timer();
   float percent_done = 0.0;
+  void *data;
 
   while (true) {
     if (RE_engine_test_break(bl_engine_)) {
@@ -183,16 +205,37 @@ void FinalEngineGPU::render(Depsgraph *depsgraph)
       break;
     }
     
-    void *data = GPU_texture_read(tex_color, GPU_DATA_FLOAT, 0);
+    for (auto &it : render_images_) {
-    memcpy(pixels.data(), data, pixels.size() * sizeof(float));
+      if (it.first == "Comdined") {
+        data = GPU_texture_read(tex_color, GPU_DATA_FLOAT, 0);
+        memcpy(it.second.data(), data, it.second.size() * sizeof(float));
+        MEM_freeN(data);
+        update_render_result();
+
+      }
+      if (it.first == "Depth") {
+        data = GPU_texture_read(tex_depth, GPU_DATA_FLOAT, 0);
+        memcpy(it.second.data(), data, it.second.size() * sizeof(float));
         MEM_freeN(data);
         update_render_result();
       }
+    }
+  }
 
-  void *data = GPU_texture_read(tex_color, GPU_DATA_FLOAT, 0);
+  for (auto &it : render_images_) {
-  memcpy(pixels.data(), data, pixels.size() * sizeof(float));
+    if (it.first == "Combined") {
+      data = GPU_texture_read(tex_color, GPU_DATA_FLOAT, 0);
+      memcpy(it.second.data(), data, it.second.size() * sizeof(float));
       MEM_freeN(data);
       update_render_result();
+    }
+    if (it.first == "Depth") {
+      data = GPU_texture_read(tex_depth, GPU_DATA_FLOAT, 0);
+      memcpy(it.second.data(), data, it.second.size() * sizeof(float));
+      MEM_freeN(data);
+      update_render_result();
+    }
+  }
 
   glDeleteVertexArrays(1, &VAO);
   GPU_framebuffer_free(framebuffer);

source/blender/render/hydra/final_engine.h

@@ -24,6 +24,7 @@ class FinalEngine : public Engine {
   std::string layer_name_;
   std::map<std::string, std::vector<float>> render_images_;
   pxr::GfVec2i resolution_;
+  Map<std::string, pxr::TfToken> aovs_map_;
 };
 
 class FinalEngineGPU : public FinalEngine {

source/blender/render/hydra/render_task_delegate.cc

@@ -15,20 +15,28 @@ RenderTaskDelegate::RenderTaskDelegate(pxr::HdRenderIndex *parent_index,
                                        pxr::SdfPath const &delegate_id)
     : pxr::HdSceneDelegate(parent_index, delegate_id)
 {
-  pxr::SdfPath render_task_id = get_task_id();
+  render_task_id_ = GetDelegateID().AppendElementString("task");
-  GetRenderIndex().InsertTask<pxr::HdxRenderTask>(this, render_task_id);
+  GetRenderIndex().InsertTask<pxr::HdxRenderTask>(this, render_task_id_);
-  GetRenderIndex().GetChangeTracker().MarkTaskDirty(render_task_id,
+  GetRenderIndex().GetChangeTracker().MarkTaskDirty(render_task_id_,
                                                     pxr::HdChangeTracker::DirtyCollection);
-  GetRenderIndex().GetChangeTracker().MarkTaskDirty(render_task_id,
+  GetRenderIndex().GetChangeTracker().MarkTaskDirty(render_task_id_,
                                                     pxr::HdChangeTracker::DirtyRenderTags);
 
+
   task_params_.enableLighting = true;
   task_params_.alphaThreshold = 0.1f;
+
+  aov_task_id_ = GetDelegateID().AppendElementString("aovTask");
+  GetRenderIndex().InsertTask<pxr::HdxVisualizeAovTask>(this, aov_task_id_);
+  GetRenderIndex().GetChangeTracker().MarkTaskDirty(aov_task_id_,
+                                                    pxr::HdChangeTracker::DirtyCollection);
+  GetRenderIndex().GetChangeTracker().MarkTaskDirty(aov_task_id_,
+                                                    pxr::HdChangeTracker::DirtyRenderTags);
 }
 
-pxr::SdfPath RenderTaskDelegate::get_task_id() const
+pxr::HdTaskSharedPtrVector RenderTaskDelegate::get_tasks()
 {
-  return GetDelegateID().AppendElementString("task");
+  return {GetRenderIndex().GetTask(aov_task_id_), GetRenderIndex().GetTask(render_task_id_)};
 }
 
 pxr::SdfPath RenderTaskDelegate::get_aov_id(pxr::TfToken const &aov) const
@@ -38,7 +46,7 @@ pxr::SdfPath RenderTaskDelegate::get_aov_id(pxr::TfToken const &aov) const
 
 bool RenderTaskDelegate::is_converged()
 {
-  pxr::HdTaskSharedPtr renderTask = GetRenderIndex().GetTask(get_task_id());
+  pxr::HdTaskSharedPtr renderTask = GetRenderIndex().GetTask(render_task_id_);
   return ((pxr::HdxRenderTask &)*renderTask).IsConverged();
 }
 
@@ -64,7 +72,7 @@ void RenderTaskDelegate::set_renderer_aov(pxr::TfToken const &aov)
     binding.aovSettings = aov_desc.aovSettings;
     task_params_.aovBindings.push_back(binding);
 
-    GetRenderIndex().GetChangeTracker().MarkTaskDirty(get_task_id(),
+    GetRenderIndex().GetChangeTracker().MarkTaskDirty(render_task_id_,
                                                       pxr::HdChangeTracker::DirtyParams);
   }
   else if (buffer_descriptors_[buffer_id] != desc) {
@@ -90,27 +98,28 @@ void RenderTaskDelegate::get_renderer_aov_data(pxr::TfToken const &aov, void *da
   buffer->Unmap();
 }
 
-pxr::HdTaskSharedPtr RenderTaskDelegate::get_task()
-{
-  return GetRenderIndex().GetTask(get_task_id());
-}
-
 void RenderTaskDelegate::set_camera_and_viewport(pxr::SdfPath const &camera_id,
                                                  pxr::GfVec4d const &viewport)
 {
   if (task_params_.viewport != viewport || task_params_.camera != camera_id) {
     task_params_.viewport = viewport;
     task_params_.camera = camera_id;
-    GetRenderIndex().GetChangeTracker().MarkTaskDirty(get_task_id(),
+    GetRenderIndex().GetChangeTracker().MarkTaskDirty(render_task_id_,
                                                       pxr::HdChangeTracker::DirtyParams);
   }
 }
 
-pxr::VtValue RenderTaskDelegate::Get(pxr::SdfPath const & /*id*/, pxr::TfToken const &key)
+pxr::VtValue RenderTaskDelegate::Get(pxr::SdfPath const &id, pxr::TfToken const &key)
 {
   if (key == pxr::HdTokens->params) {
+    if (id == aov_task_id_) {
+      aov_task_params_.aovName = pxr::HdAovTokens->depth;
+      return pxr::VtValue(aov_task_params_);
+    }
+    else if (id == render_task_id_) {
       return pxr::VtValue(task_params_);
     }
+  }
   if (key == pxr::HdTokens->collection) {
     pxr::HdRprimCollection rprim_collection(pxr::HdTokens->geometry,
                                             pxr::HdReprSelector(pxr::HdReprTokens->smoothHull),

source/blender/render/hydra/render_task_delegate.h

@@ -5,6 +5,7 @@
 
 #include <pxr/imaging/hd/sceneDelegate.h>
 #include <pxr/imaging/hdx/renderSetupTask.h>
+#include <pxr/imaging/hdx/visualizeAovTask.h>
 
 namespace blender::render::hydra {
 
@@ -13,7 +14,7 @@ class RenderTaskDelegate : public pxr::HdSceneDelegate {
   RenderTaskDelegate(pxr::HdRenderIndex *parent_index, pxr::SdfPath const &delegate_id);
   ~RenderTaskDelegate() override = default;
 
-  pxr::SdfPath get_task_id() const;
+  pxr::HdTaskSharedPtrVector get_tasks();
   pxr::SdfPath get_aov_id(pxr::TfToken const &aov) const;
 
   bool is_converged();
@@ -21,7 +22,6 @@ class RenderTaskDelegate : public pxr::HdSceneDelegate {
   pxr::HdRenderBuffer *get_renderer_aov(pxr::TfToken const &id);
   void get_renderer_aov_data(pxr::TfToken const &id, void *buf);
 
-  pxr::HdTaskSharedPtr get_task();
   void set_camera_and_viewport(pxr::SdfPath const &cameraId, pxr::GfVec4d const &viewport);
 
   /* Delegate methods */
@@ -30,6 +30,9 @@ class RenderTaskDelegate : public pxr::HdSceneDelegate {
   pxr::TfTokenVector GetTaskRenderTags(pxr::SdfPath const &taskId) override;
 
  private:
+  pxr::SdfPath aov_task_id_;
+  pxr::SdfPath render_task_id_;
+  pxr::HdxVisualizeAovTaskParams aov_task_params_;
   pxr::HdxRenderTaskParams task_params_;
   pxr::TfHashMap<pxr::SdfPath, pxr::HdRenderBufferDescriptor, pxr::SdfPath::Hash>
       buffer_descriptors_;

source/blender/render/hydra/viewport_engine.cc

@@ -256,7 +256,9 @@ void ViewportEngine::render(Depsgraph * /* depsgraph */, bContext *context)
   if (light_tasks_delegate_) {
     tasks = light_tasks_delegate_->get_tasks();
   }
-  tasks.push_back(render_task_delegate_->get_task());
+  for (auto &task : render_task_delegate_->get_tasks()) {
+    tasks.push_back(task);
+  }
   
   engine_->Execute(render_index_.get(), &tasks);