/*
 * CINELERRA
 * Copyright (C) 2008-2014 Adam Williams <broadcast at earthling dot net>
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#ifndef AFFINE_H
#define AFFINE_H


#include "affine.inc"
#include "loadbalance.h"
#include "vframe.inc"

// Affine transform library

#define AFFINE_OVERSAMPLE 2

class AffineMatrix
{
public:
	AffineMatrix();
	void identity();
	void translate(double x, double y);
	void scale(double x, double y);
// Result is put in dst
	void multiply(AffineMatrix *dst);
	void copy_from(AffineMatrix *src);
	void invert(AffineMatrix *dst);
// in x1,y1 x2,y1  out x1,y1  x2,y2
//    x1,y2 x2,y2      x3,y3  x4,y4
	void set_matrix(double in_x1, double in_y1, double in_x2, double in_y2,
		double out_x1, double out_y1, double out_x2, double out_y2,
		double out_x3, double out_y3, double out_x4, double out_y4);
	void transform_point(float x, float y, float *newx, float *newy);
	double determinant();
	void dump();
	double values[3][3];
};

class AffinePackage : public LoadPackage
{
public:
	AffinePackage();
	int y1, y2;
};

class AffineUnit : public LoadClient
{
public:
	AffineUnit(AffineEngine *server);
	void process_package(LoadPackage *package);
//	float transform_cubic(float dx, float jm1, float j, float jp1, float jp2);
	AffineEngine *server;
};

class AffineEngine : public LoadServer
{
public:
	AffineEngine(int total_clients,
		int total_packages);

// Range of coords is 0 to 100 for coordinates in the image.
// The coordinate locations are clockwise around the image.
	void process(VFrame *output, VFrame *input, VFrame *temp, int mode,
		float x1, float y1, float x2, float y2,
		float x3, float y3, float x4, float y4,
		int forward);
	void set_matrix(
		double in_x1, double in_y1, double in_x2, double in_y2,
		double out_x1, double out_y1, double out_x2, double out_y2,
		double out_x3, double out_y3, double out_x4, double out_y4);
// Do rotation with the affine/perspective transform.
// This removes some of the extremely faint artifacts in the trig rotation.
	void rotate(VFrame *output, VFrame *input, float angle);
// Set the viewport to transform.  The transform is based on the input viewport.
// The output viewport clips the transformed output.
	void set_in_viewport(int x, int y, int w, int h);
// Only used by motion tracker.  Not used in OpenGL.
	void set_out_viewport(int x, int y, int w, int h);

// Set the viewport for both input and output.  Removed in HV 4.5.
// Compatibility function introduced to avoid having to rewrite old
// plugins.  Should be removed when no plugin uses it any more.
	void set_viewport(int x, int y, int w, int h);
// For rotation, set the pivot point.  Also affects output in OpenGL.
// The default is in the middle of the viewport.
	void set_in_pivot(int x, int y);
// Set the pivot point in the output.  Only used by motion tracker.
	void set_out_pivot(int x, int y);
// Set the pivot point for both input and output.  Removed in HV 4.5.
// Compatibility function introduced to avoid having to rewrite old
// plugins.
	void set_pivot(int x, int y);
// Never used
	void unset_pivot();
	void unset_viewport();
// default: AF_CUBIC
	void set_interpolation(int type);
// To use OpenGL for the processing, set to 1
	void set_opengl(int value);
	void init_packages();
	LoadClient* new_client();
	LoadPackage* new_package();


	VFrame *input, *output, *temp;
	int mode;
	enum {
		PERSPECTIVE,
		SHEER,
		STRETCH,
		ROTATE,
// multiply directly by a matrix.
		TRANSFORM
	};
	int interpolation;
	enum {
		AF_DEFAULT,
		AF_NEAREST,
		AF_LINEAR,
		AF_CUBIC,
		AF_MODES
	};

// arbitrary matrix
	AffineMatrix matrix;
// Transformation coordinates
	float x1, y1, x2, y2, x3, y3, x4, y4;
// Viewport coordinates
	int in_x, in_y, in_w, in_h;
	int out_x, out_y, out_w, out_h;
// Pivot coordinates
	int in_pivot_x, in_pivot_y;
	int out_pivot_x, out_pivot_y;
	int user_in_pivot;
	int user_out_pivot;
	int user_in_viewport;
	int user_out_viewport;
	int forward;
	int use_opengl;
	int total_packages;
};



#endif