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authorWerner Almesberger <werner@almesberger.net>2016-08-17 21:31:56 -0300
committerWerner Almesberger <werner@almesberger.net>2016-08-17 21:31:56 -0300
commitaa48221d9d5cb91ea4bb2eafbf0189e459996a5a (patch)
treeb7b21746ae4f4e4d2bba77138b54670cbd931894 /gfx/misc.h
parent65ba1f11f0ca4bc191df128a28af5c12a330c110 (diff)
downloadeeshow-aa48221d9d5cb91ea4bb2eafbf0189e459996a5a.tar.gz
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eeshow/misc.c: goes to gfx/, too
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+/*
+ * gfx/misc.h - Helper functions for geometry and attributes
+ *
+ * Written 2016 by Werner Almesberger
+ * Copyright 2016 Werner Almesberger
+ *
+ * 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.
+ */
+
+
+#ifndef GFX_MISC_H
+#define GFX_MISC_H
+
+#include <stdbool.h>
+
+
+static inline int mxr(int x, int y, const int m[6])
+{
+ return x * m[1] + y * m[2];
+}
+
+
+static inline int myr(int x, int y, const int m[6])
+{
+ return x * m[4] + y * m[5];
+}
+
+
+static inline int mx(int x, int y, const int m[6])
+{
+ return m[0] + mxr(x, y, m);
+}
+
+
+static inline int my(int x, int y, const int m[6])
+{
+ return m[3] + myr(x, y, m);
+}
+
+
+unsigned matrix_to_angle(const int m[6]);
+bool matrix_is_mirrored(const int m[6]);
+int angle_add(int a, int b);
+
+int rx(int x, int y, int rot);
+int ry(int x, int y, int rot);
+
+#endif /* !GFX_MISC_H */