1 files changed, 31 insertions, 0 deletions
diff --git a/source/blender/io/stl/importer/stl_import_binary_reader.hh b/source/blender/io/stl/importer/stl_import_binary_reader.hh
new file mode 100644
index 00000000000..71d5dbbbe58
--- /dev/null
+++ b/source/blender/io/stl/importer/stl_import_binary_reader.hh
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/** \file
+ * \ingroup stl
+ */
+
+#pragma once
+
+#include <cstdio>
+
+#include "BKE_mesh.h"
+
+/*  Binary STL spec.:
+ *   UINT8[80]    – Header                  - 80 bytes
+ *   UINT32       – Number of triangles     - 4 bytes
+ *   For each triangle                      - 50 bytes:
+ *     REAL32[3]   – Normal vector          - 12 bytes
+ *     REAL32[3]   – Vertex 1               - 12 bytes
+ *     REAL32[3]   – Vertex 2               - 12 bytes
+ *     REAL32[3]   – Vertex 3               - 12 bytes
+ *     UINT16      – Attribute byte count   -  2 bytes
+ */
+
+namespace blender::io::stl {
+
+const size_t BINARY_HEADER_SIZE = 80;
+const size_t BINARY_STRIDE = 12 * 4 + 2;
+
+Mesh *read_stl_binary(FILE *file, Main *bmain, char *mesh_name, bool use_custom_normals);
+
+}  // namespace blender::io::stl