/* 
 * Linux VeeJay
 *
 * Copyright(C)2002 Niels Elburg <elburg@hio.hen.nl>
 *
 * 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.
 */
#include <config.h>
#include <stdio.h>
#include <stdint.h>
#include <libvjmem/vjmem.h>
#include <libvje/vje.h>
#include <veejay/vj-viewport.h>
#include "common.h"
vj_effect *perspective_init(int width , int height)
{
    vj_effect *ve = (vj_effect *) vj_calloc(sizeof(vj_effect));
    ve->num_params = 9;
    ve->defaults = (int *) vj_calloc(sizeof(int) * ve->num_params);	/* default values */
    ve->limits[0] = (int *) vj_calloc(sizeof(int) * ve->num_params);	/* min */
    ve->limits[1] = (int *) vj_calloc(sizeof(int) * ve->num_params);	/* max */
    ve->defaults[0] = 30; /* x1, y1 */
    ve->defaults[1] = 30;

    ve->defaults[2] = 70; /* x2, y2 */
    ve->defaults[3] = 30;

	ve->defaults[4] = 70; /* x3, y3 */
	ve->defaults[5] = 70;

	ve->defaults[6] = 30; /* x3, y4 */
	ve->defaults[7] = 70;

	ve->defaults[0] = 0; /* reverse */

	int i;
	for( i = 0; i < 8 ; i ++ ) {
		ve->limits[0][i] = -100;
		ve->limits[1][i] = 100;
	}

	ve->limits[0][8] = 0;
	ve->limits[1][8] = 1;
    
	ve->description = "Perspective Tool";
    ve->sub_format = 1;
    ve->extra_frame = 0;
    ve->has_user = 0;
	
	ve->param_description = vje_build_param_list( ve->num_params, 
			"Point 1 (X)", "Point 1 (Y)", "Point 2 (X)", "Point 2 (Y)",
		    "Point 3 (X)", "Point 3 (Y)", "Point 4 (X)", "Point 4 (Y)",
			"Reverse"	);
    return ve;
}
static int perspective_[9] = { 0 };
static void *perspective_vp_ = NULL;

static uint8_t *perspective_private_[4] = { NULL, NULL, NULL, NULL };

int	perspective_malloc(int width, int height)
{
	int i;
	for( i = 0; i < 3; i ++ ) {	
		perspective_private_[i] = (uint8_t*) vj_malloc( sizeof(uint8_t) * RUP8(width*height+width));
		if(!perspective_private_[i])
			return 0;
	}
	veejay_memset( perspective_, 0, sizeof(perspective_));

	return 1;
}

void perspective_free() {
	int i;
	for( i = 0; i < 3; i ++ ) {	
	if( perspective_private_[i] )
		free(perspective_private_[i] );
		perspective_private_[i] = NULL;
	}
	if( perspective_vp_ )
		viewport_destroy( perspective_vp_ );
	perspective_vp_ = NULL;
}

void perspective_apply( VJFrame *frame, int width, int height, int x1, int y1, int x2, int y2, int x3, int y3, int x4, int y4, int reverse)
{
	if( x1 != perspective_[0] || y1 != perspective_[1] || x2 != perspective_[2] || y2 != perspective_[3] ||
			x3 != perspective_[4] || y3 != perspective_[5] || x4 != perspective_[6] || y4 != perspective_[7] || reverse != perspective_[8] )
	{
		if( perspective_vp_ )
			viewport_destroy( perspective_vp_ );
		perspective_vp_ = viewport_fx_init_map( width,height,x1,y1, x2,y2, x3,y3, x4,y4, reverse );
		if(!perspective_vp_ )
			return;
		perspective_[0] = x1;
		perspective_[1] = y1;
		perspective_[2] = x2;
		perspective_[3] = y2;
		perspective_[4] = x3;
		perspective_[5] = y3;
		perspective_[6] = x4;
		perspective_[7] = y4;
		perspective_[8] = reverse;
	}

	int strides[4] = { (width*height),(width*height),(width*height), 0 };
	vj_frame_copy( frame->data, perspective_private_, strides );

	viewport_process_dynamic( perspective_vp_, perspective_private_, frame->data );
	
}