#ifndef igs_perlin_noise_h
#define igs_perlin_noise_h

#ifndef IGS_PERLIN_NOISE_EXPORT
#define IGS_PERLIN_NOISE_EXPORT
#endif

namespace igs
{
namespace perlin_noise
{
IGS_PERLIN_NOISE_EXPORT void change(
	unsigned char *image_array, const int height // pixel
	,
	const int width // pixel
	,
	const int channels, const int bits, const bool alpha_rendering_sw = true

	,
	const double a11 = 0.01 // 2D affine transformation
	,
	const double a12 = 0.0, const double a13 = 0.0, const double a21 = 0.0, const double a22 = 0.01, const double a23 = 0.0

	,
	const double zz = 0.0, const int octaves_start = 3 // 0...
	,
	const int octaves_end = 9 // 0...
	,
	const double persistence = 1. / 1.7320508 // not 0
	);
}
}

#endif /* !igs_perlin_noise_h */