Add Chromium-only Blender WebEngine parity work

blender-5.2.0/intern/cycles/integrator/tile.h

@@ -0,0 +1,46 @@
+/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
+ *
+ * SPDX-License-Identifier: Apache-2.0 */
+
+#pragma once
+
+#include <iosfwd>
+
+#include "util/types_int2.h"
+
+CCL_NAMESPACE_BEGIN
+
+struct TileSize {
+  TileSize() = default;
+
+  TileSize(const int width, const int height, const int num_samples)
+      : width(width), height(height), num_samples(num_samples)
+  {
+  }
+
+  bool operator==(const TileSize &other) const
+  {
+    return width == other.width && height == other.height && num_samples == other.num_samples;
+  }
+  bool operator!=(const TileSize &other) const
+  {
+    return !(*this == other);
+  }
+
+  int width = 0, height = 0;
+  int num_samples = 0;
+};
+
+std::ostream &operator<<(std::ostream &os, const TileSize &tile_size);
+
+/* Calculate tile size which is best suitable for rendering image of a given size with given number
+ * of active path states.
+ * Will attempt to provide best guess to keep path tracing threads of a device as localized as
+ * possible, and have as many threads active for every tile as possible. */
+TileSize tile_calculate_best_size(const bool accel_rt,
+                                  const int2 &image_size,
+                                  const int num_samples,
+                                  const int max_num_path_states,
+                                  const float scrambling_distance);
+
+CCL_NAMESPACE_END