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diff --git a/libs/cairo-1.16.0/test/pdiff/lpyramid.h b/libs/cairo-1.16.0/test/pdiff/lpyramid.h
new file mode 100644
index 0000000..e47a66e
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+++ b/libs/cairo-1.16.0/test/pdiff/lpyramid.h
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+/*
+  Laplacian Pyramid
+  Copyright (C) 2006 Yangli Hector Yee
+
+  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, Suite 500, Boston, MA 02110-1335, USA
+*/
+#ifndef _LPYRAMID_H
+#define _LPYRAMID_H
+
+#define MAX_PYR_LEVELS 8
+
+typedef struct _lpyramid lpyramid_t;
+
+lpyramid_t *
+lpyramid_create (float *image, int width, int height);
+
+void
+lpyramid_destroy (lpyramid_t *pyramid);
+
+float
+lpyramid_get_value (lpyramid_t *pyramid, int x, int y, int level);
+
+#endif /* _LPYRAMID_H */