1 files changed, 65 insertions, 0 deletions
diff --git a/source/blender/blendthumb/src/blendthumb.hh b/source/blender/blendthumb/src/blendthumb.hh
new file mode 100644
index 00000000000..c029a1766d6
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+++ b/source/blender/blendthumb/src/blendthumb.hh
@@ -0,0 +1,65 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2008-2021 Blender Foundation.
+ * All rights reserved.
+ */
+
+/** \file
+ * \ingroup blendthumb
+ *
+ * Shared thumbnail extraction logic.
+ *
+ * Used for both MS-Windows DLL and Unix command line.
+ */
+
+#pragma once
+
+#include <optional>
+
+#include "BLI_array.hh"
+#include "BLI_vector.hh"
+
+struct FileReader;
+
+struct Thumbnail {
+  blender::Array<uint8_t> data;
+  int width;
+  int height;
+};
+
+enum eThumbStatus {
+  BT_OK = 0,
+  BT_FILE_ERR = 1,
+  BT_COMPRES_ERR = 2,
+  BT_DECOMPRESS_ERR = 3,
+  BT_INVALID_FILE = 4,
+  BT_EARLY_VERSION = 5,
+  BT_INVALID_THUMB = 6,
+  BT_ERROR = 9
+};
+
+std::optional<blender::Vector<uint8_t>> blendthumb_create_png_data_from_thumb(
+    const Thumbnail *thumb);
+eThumbStatus blendthumb_create_thumb_from_file(struct FileReader *rawfile, Thumbnail *thumb);
+
+/* INTEGER CODES */
+#ifdef __BIG_ENDIAN__
+/* Big Endian */
+#  define MAKE_ID(a, b, c, d) ((int)(a) << 24 | (int)(b) << 16 | (c) << 8 | (d))
+#else
+/* Little Endian */
+#  define MAKE_ID(a, b, c, d) ((int)(d) << 24 | (int)(c) << 16 | (b) << 8 | (a))
+#endif