From d7d40745fa09061a3117bd3669c5a46bbf611eae Mon Sep 17 00:00:00 2001
From: Brecht Van Lommel <brecht@blender.org>
Date: Sun, 24 Oct 2021 14:19:19 +0200
Subject: Cycles: changes to source code folders structure

* Split render/ into scene/ and session/. The scene/ folder now contains the
  scene and its nodes. The session/ folder contains the render session and
  associated data structures like drivers and render buffers.
* Move top level kernel headers into new folders kernel/camera/, kernel/film/,
  kernel/light/, kernel/sample/, kernel/util/
* Move integrator related kernel headers into kernel/integrator/
* Move OSL shaders from kernel/shaders/ to kernel/osl/shaders/

For patches and branches, git merge and rebase should be able to detect the
renames and move over code to the right file.
---
 intern/cycles/scene/tables.cpp | 130 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 intern/cycles/scene/tables.cpp

(limited to 'intern/cycles/scene/tables.cpp')

diff --git a/intern/cycles/scene/tables.cpp b/intern/cycles/scene/tables.cpp
new file mode 100644
index 00000000000..39edc5d89cd
--- /dev/null
+++ b/intern/cycles/scene/tables.cpp
@@ -0,0 +1,130 @@
+/*
+ * Copyright 2011-2013 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 "scene/tables.h"
+#include "device/device.h"
+#include "scene/scene.h"
+#include "scene/stats.h"
+
+#include "util/util_logging.h"
+#include "util/util_time.h"
+
+CCL_NAMESPACE_BEGIN
+
+/* Lookup Tables */
+
+LookupTables::LookupTables()
+{
+  need_update_ = true;
+}
+
+LookupTables::~LookupTables()
+{
+  assert(lookup_tables.size() == 0);
+}
+
+void LookupTables::device_update(Device *, DeviceScene *dscene, Scene *scene)
+{
+  if (!need_update())
+    return;
+
+  scoped_callback_timer timer([scene](double time) {
+    if (scene->update_stats) {
+      scene->update_stats->tables.times.add_entry({"device_update", time});
+    }
+  });
+
+  VLOG(1) << "Total " << lookup_tables.size() << " lookup tables.";
+
+  if (lookup_tables.size() > 0)
+    dscene->lookup_table.copy_to_device();
+
+  need_update_ = false;
+}
+
+void LookupTables::device_free(Device *, DeviceScene *dscene)
+{
+  dscene->lookup_table.free();
+}
+
+bool LookupTables::need_update() const
+{
+  return need_update_;
+}
+
+static size_t round_up_to_multiple(size_t size, size_t chunk)
+{
+  return ((size + chunk - 1) / chunk) * chunk;
+}
+
+size_t LookupTables::add_table(DeviceScene *dscene, vector<float> &data)
+{
+  assert(data.size() > 0);
+
+  need_update_ = true;
+
+  Table new_table;
+  new_table.offset = 0;
+  new_table.size = round_up_to_multiple(data.size(), TABLE_CHUNK_SIZE);
+
+  /* find space to put lookup table */
+  list<Table>::iterator table;
+
+  for (table = lookup_tables.begin(); table != lookup_tables.end(); table++) {
+    if (new_table.offset + new_table.size <= table->offset) {
+      lookup_tables.insert(table, new_table);
+      break;
+    }
+    else
+      new_table.offset = table->offset + table->size;
+  }
+
+  if (table == lookup_tables.end()) {
+    /* add at the end */
+    lookup_tables.push_back(new_table);
+    dscene->lookup_table.resize(new_table.offset + new_table.size);
+  }
+
+  /* copy table data and return offset */
+  float *dtable = dscene->lookup_table.data();
+  memcpy(dtable + new_table.offset, &data[0], sizeof(float) * data.size());
+
+  return new_table.offset;
+}
+
+void LookupTables::remove_table(size_t *offset)
+{
+  if (*offset == TABLE_OFFSET_INVALID) {
+    /* The table isn't even allocated, so just return here. */
+    return;
+  }
+
+  need_update_ = true;
+
+  list<Table>::iterator table;
+
+  for (table = lookup_tables.begin(); table != lookup_tables.end(); table++) {
+    if (table->offset == *offset) {
+      lookup_tables.erase(table);
+      *offset = TABLE_OFFSET_INVALID;
+      return;
+    }
+  }
+
+  assert(table != lookup_tables.end());
+}
+
+CCL_NAMESPACE_END
-- 
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