Add Chromium-only Blender WebEngine parity work

blender-5.2.0/intern/cycles/scene/tables.cpp

@@ -0,0 +1,119 @@
+/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
+ *
+ * SPDX-License-Identifier: Apache-2.0 */
+
+#include "scene/tables.h"
+#include "device/device.h"
+#include "scene/scene.h"
+#include "scene/stats.h"
+
+#include "util/log.h"
+#include "util/time.h"
+
+CCL_NAMESPACE_BEGIN
+
+/* Lookup Tables */
+
+LookupTables::LookupTables()
+{
+  need_update_ = true;
+}
+
+LookupTables::~LookupTables()
+{
+  assert(lookup_tables.empty());
+}
+
+void LookupTables::device_update(Device * /*unused*/, DeviceScene *dscene, Scene *scene)
+{
+  if (!need_update()) {
+    return;
+  }
+
+  const scoped_callback_timer timer([scene](double time) {
+    if (scene->update_stats) {
+      scene->update_stats->tables.times.add_entry({"device_update", time});
+    }
+  });
+
+  LOG_INFO << "Total " << lookup_tables.size() << " lookup tables.";
+
+  if (!lookup_tables.empty()) {
+    dscene->lookup_table.copy_to_device();
+  }
+
+  need_update_ = false;
+}
+
+void LookupTables::device_free(Device * /*unused*/, DeviceScene *dscene)
+{
+  dscene->lookup_table.free();
+}
+
+bool LookupTables::need_update() const
+{
+  return need_update_;
+}
+
+static size_t round_up_to_multiple(const size_t size, const size_t chunk)
+{
+  return ((size + chunk - 1) / chunk) * chunk;
+}
+
+size_t LookupTables::add_table(DeviceScene *dscene, vector<float> &data)
+{
+  assert(!data.empty());
+
+  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;
+    }
+    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.data(), 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