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libs/libgccvb/affine.h

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+// affine.h
+// v0.1 beta (preliminary scaling functions added)
+// functions and macros to make affine transformations easier
+// for use with gccVB
+// written by Parasyte (parasytic_i[at]yahoo.com)
+
+#ifndef _LIBGCCVB_AFFINE_H
+#define _LIBGCCVB_AFFINE_H
+
+
+#include "types.h"
+#include "video.h"
+
+
+#define fixed_7_9(n)		(f32)(n * (1<<9))			//convert from float\int\etc to 7.9 fixed
+#define fixed_13_3(n)		(f16)(n * (1<<3))			//convert from float\int\etc to 13.3 fixed
+#define inverse_fixed(n)	(f16)((1<<18)/fixed_7_9(n))	//convert from float\int\etc to 7.9 fixed (with inversion)
+
+
+void affine_clr_param(u8 world);
+void affine_scale(u8 world, s16 centerX, s16 centerY, u16 imageW, u16 imageH, float scaleX, float scaleY);
+void affine_fast_scale(u8 world, float scale);
+
+
+#endif