Add Chromium-only Blender WebEngine parity work

blender-5.2.0/source/blender/io/stl/intern/stl_data.hh

@@ -0,0 +1,27 @@
+/* SPDX-FileCopyrightText: 2024 Blender Authors
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+#pragma once
+
+#include "BLI_math_vector_types.hh"
+
+#include <cstdint>
+
+namespace blender::io::stl {
+
+#pragma pack(push, 1)
+struct PackedTriangle {
+  float3 normal;
+  float3 vertices[3];
+  uint16_t attribute_byte_count;
+};
+#pragma pack(pop)
+
+inline constexpr size_t BINARY_HEADER_SIZE = 80;
+inline constexpr size_t BINARY_STRIDE = sizeof(PackedTriangle);
+
+static_assert(sizeof(PackedTriangle) == 12 + (12 * 3) + 2,
+              "PackedTriangle expected size mismatch");
+
+}  // namespace blender::io::stl