EEVEE-Next: Register render passes for compositor.

EEVEE-Next passes were rendered to the render result, but didn't appear
in the compositor. Reasoning is that when a render engine has the update
render passes callback registered it would not register any default
render passes. This callback is used to update the Render Layer node.

This patch implements the callback for EEVEE-Next with the render passes
that are already available. In the future the callback should be
extended. Note that AO/SHADOW render passes have been disabled for now
as they need to be converted to color buffers.

1 files changed, 45 insertions, 1 deletions

diff --git a/source/blender/draw/engines/eevee_next/eevee_engine.cc b/source/blender/draw/engines/eevee_next/eevee_engine.cc
index 37b4bde324e..2e476b7d891 100644
--- a/source/blender/draw/engines/eevee_next/eevee_engine.cc
+++ b/source/blender/draw/engines/eevee_next/eevee_engine.cc
@@ -172,7 +172,51 @@ static void eevee_render_update_passes(RenderEngine *engine, Scene *scene, ViewL
   if (!GPU_shader_storage_buffer_objects_support()) {
     return;
   }
-  UNUSED_VARS(engine, scene, view_layer);
+
+  RE_engine_register_pass(engine, scene, view_layer, RE_PASSNAME_COMBINED, 4, "RGBA", SOCK_RGBA);
+
+#define CHECK_PASS_LEGACY(name, type, channels, chanid) \
+  if (view_layer->passflag & (SCE_PASS_##name)) { \
+    RE_engine_register_pass( \
+        engine, scene, view_layer, RE_PASSNAME_##name, channels, chanid, type); \
+  } \
+  ((void)0)
+#define CHECK_PASS_EEVEE(name, type, channels, chanid) \
+  if (view_layer->eevee.render_passes & (EEVEE_RENDER_PASS_##name)) { \
+    RE_engine_register_pass( \
+        engine, scene, view_layer, RE_PASSNAME_##name, channels, chanid, type); \
+  } \
+  ((void)0)
+
+  CHECK_PASS_LEGACY(Z, SOCK_FLOAT, 1, "Z");
+  CHECK_PASS_LEGACY(MIST, SOCK_FLOAT, 1, "Z");
+  CHECK_PASS_LEGACY(NORMAL, SOCK_VECTOR, 3, "XYZ");
+  CHECK_PASS_LEGACY(DIFFUSE_DIRECT, SOCK_RGBA, 3, "RGB");
+  CHECK_PASS_LEGACY(DIFFUSE_COLOR, SOCK_RGBA, 3, "RGB");
+  CHECK_PASS_LEGACY(GLOSSY_DIRECT, SOCK_RGBA, 3, "RGB");
+  CHECK_PASS_LEGACY(GLOSSY_COLOR, SOCK_RGBA, 3, "RGB");
+  CHECK_PASS_EEVEE(VOLUME_LIGHT, SOCK_RGBA, 3, "RGB");
+  CHECK_PASS_LEGACY(EMIT, SOCK_RGBA, 3, "RGB");
+  CHECK_PASS_LEGACY(ENVIRONMENT, SOCK_RGBA, 3, "RGB");
+  /* TODO: CHECK_PASS_LEGACY(SHADOW, SOCK_RGBA, 3, "RGB");
+   * CHECK_PASS_LEGACY(AO, SOCK_RGBA, 3, "RGB");
+   * When available they should be converted from Value textures to RGB. */
+
+  LISTBASE_FOREACH (ViewLayerAOV *, aov, &view_layer->aovs) {
+    if ((aov->flag & AOV_CONFLICT) != 0) {
+      continue;
+    }
+    switch (aov->type) {
+      case AOV_TYPE_COLOR:
+        RE_engine_register_pass(engine, scene, view_layer, aov->name, 4, "RGBA", SOCK_RGBA);
+        break;
+      case AOV_TYPE_VALUE:
+        RE_engine_register_pass(engine, scene, view_layer, aov->name, 1, "X", SOCK_FLOAT);
+        break;
+      default:
+        break;
+    }
+  }
 }
 
 static const DrawEngineDataSize eevee_data_size = DRW_VIEWPORT_DATA_SIZE(EEVEE_Data);