1 files changed, 159 insertions, 0 deletions
diff --git a/source/blender/draw/engines/eevee_next/eevee_sync.hh b/source/blender/draw/engines/eevee_next/eevee_sync.hh
new file mode 100644
index 00000000000..74b08d0f10a
--- /dev/null
+++ b/source/blender/draw/engines/eevee_next/eevee_sync.hh
@@ -0,0 +1,159 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright 2021 Blender Foundation.
+ */
+
+/** \file
+ * \ingroup eevee
+ *
+ * Structures to identify unique data blocks. The keys are unique so we are able to
+ * match ids across frame updates.
+ */
+
+#pragma once
+
+#include "BKE_duplilist.h"
+#include "BLI_ghash.h"
+#include "BLI_map.hh"
+#include "DNA_object_types.h"
+#include "DRW_render.h"
+#include "GPU_material.h"
+
+#include "eevee_shader_shared.hh"
+
+namespace blender::eevee {
+
+class Instance;
+
+/* -------------------------------------------------------------------- */
+/** \name ObjectKey
+ *
+ * Unique key to identify each object in the hashmap.
+ * \{ */
+
+struct ObjectKey {
+  /** Hash value of the key. */
+  uint64_t hash_value;
+  /** Original Object or source object for duplis. */
+  Object *ob;
+  /** Original Parent object for duplis. */
+  Object *parent;
+  /** Dupli objects recursive unique identifier */
+  int id[MAX_DUPLI_RECUR];
+  /** If object uses particle system hair. */
+  bool use_particle_hair;
+#ifdef DEBUG
+  char name[64];
+#endif
+  ObjectKey() : ob(nullptr), parent(nullptr){};
+
+  ObjectKey(Object *ob_, Object *parent_, int id_[MAX_DUPLI_RECUR], bool use_particle_hair_)
+      : ob(ob_), parent(parent_), use_particle_hair(use_particle_hair_)
+  {
+    if (id_) {
+      memcpy(id, id_, sizeof(id));
+    }
+    else {
+      memset(id, 0, sizeof(id));
+    }
+    /* Compute hash on creation so we avoid the cost of it for every sync. */
+    hash_value = BLI_ghashutil_ptrhash(ob);
+    hash_value = BLI_ghashutil_combine_hash(hash_value, BLI_ghashutil_ptrhash(parent));
+    for (int i = 0; i < MAX_DUPLI_RECUR; i++) {
+      if (id[i] != 0) {
+        hash_value = BLI_ghashutil_combine_hash(hash_value, BLI_ghashutil_inthash(id[i]));
+      }
+      else {
+        break;
+      }
+    }
+#ifdef DEBUG
+    STRNCPY(name, ob->id.name);
+#endif
+  }
+
+  ObjectKey(Object *ob, DupliObject *dupli, Object *parent)
+      : ObjectKey(ob, parent, dupli ? dupli->persistent_id : nullptr, false){};
+
+  ObjectKey(Object *ob)
+      : ObjectKey(ob, DRW_object_get_dupli(ob), DRW_object_get_dupli_parent(ob)){};
+
+  uint64_t hash(void) const
+  {
+    return hash_value;
+  }
+
+  bool operator<(const ObjectKey &k) const
+  {
+    if (ob != k.ob) {
+      return (ob < k.ob);
+    }
+    if (parent != k.parent) {
+      return (parent < k.parent);
+    }
+    if (use_particle_hair != k.use_particle_hair) {
+      return (use_particle_hair < k.use_particle_hair);
+    }
+    return memcmp(id, k.id, sizeof(id)) < 0;
+  }
+
+  bool operator==(const ObjectKey &k) const
+  {
+    if (ob != k.ob) {
+      return false;
+    }
+    if (parent != k.parent) {
+      return false;
+    }
+    if (use_particle_hair != k.use_particle_hair) {
+      return false;
+    }
+    return memcmp(id, k.id, sizeof(id)) == 0;
+  }
+};
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name Sync Module
+ *
+ * \{ */
+
+struct ObjectHandle : public DrawData {
+  ObjectKey object_key;
+
+  void reset_recalc_flag(void)
+  {
+    if (recalc != 0) {
+      recalc = 0;
+    }
+  }
+};
+
+struct WorldHandle : public DrawData {
+  void reset_recalc_flag(void)
+  {
+    if (recalc != 0) {
+      recalc = 0;
+    }
+  }
+};
+
+class SyncModule {
+ private:
+  Instance &inst_;
+
+ public:
+  SyncModule(Instance &inst) : inst_(inst){};
+  ~SyncModule(){};
+
+  ObjectHandle &sync_object(Object *ob);
+  WorldHandle &sync_world(::World *world);
+
+  void sync_mesh(Object *ob, ObjectHandle &ob_handle);
+  void sync_gpencil(Object *ob, ObjectHandle &ob_handle);
+  void sync_curves(Object *ob, ObjectHandle &ob_handle, ModifierData *modifier_data);
+};
+
+/** \} */
+
+}  // namespace blender::eevee