/*
 * $Id$
 *
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2006 Blender Foundation.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/** \file blender/nodes/intern/CMP_nodes/CMP_rotate.c
 *  \ingroup cmpnodes
 */


#include "../CMP_util.h"

/* **************** Rotate  ******************** */

static bNodeSocketType cmp_node_rotate_in[]= {
	{	SOCK_RGBA, 1, "Image",			0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
	{	SOCK_VALUE, 1, "Degr",			0.0f, 0.0f, 0.0f, 0.0f, -10000.0f, 10000.0f},
	{	-1, 0, ""	}
};
static bNodeSocketType cmp_node_rotate_out[]= {
	{	SOCK_RGBA, 0, "Image",			0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f},
	{	-1, 0, ""	}
};

/* only supports RGBA nodes now */
static void node_composit_exec_rotate(void *UNUSED(data), bNode *node, bNodeStack **in, bNodeStack **out)
{

	if(out[0]->hasoutput==0)
		return;

	if(in[0]->data) {
		CompBuf *cbuf= typecheck_compbuf(in[0]->data, CB_RGBA);
		CompBuf *stackbuf= alloc_compbuf(cbuf->x, cbuf->y, CB_RGBA, 1);	/* note, this returns zero'd image */
		float rad, u, v, s, c, centx, centy, miny, maxy, minx, maxx;
		int x, y, yo, xo;
		ImBuf *ibuf, *obuf;

		rad= (M_PI*in[1]->vec[0])/180.0f;

		s= sin(rad);
		c= cos(rad);
		centx= cbuf->x/2;
		centy= cbuf->y/2;

		minx= -centx;
		maxx= -centx + (float)cbuf->x;
		miny= -centy;
		maxy= -centy + (float)cbuf->y;


		ibuf=IMB_allocImBuf(cbuf->x, cbuf->y, 32, 0);
		obuf=IMB_allocImBuf(stackbuf->x, stackbuf->y, 32, 0);

		if(ibuf && obuf){
			ibuf->rect_float=cbuf->rect;
			obuf->rect_float=stackbuf->rect;

			for(y=miny; y<maxy; y++) {
				yo= y+(int)centy;

				for(x=minx; x<maxx;x++) {
					u=c*x + y*s + centx;
					v=-s*x + c*y + centy;
					xo= x+(int)centx;

					switch(node->custom1) {
					case 0:
						neareast_interpolation(ibuf, obuf, u, v, xo, yo);
						break ;
					case 1:
						bilinear_interpolation(ibuf, obuf, u, v, xo, yo);
						break;
					case 2:
						bicubic_interpolation(ibuf, obuf, u, v, xo, yo);
					}

				}
			}

			/* rotate offset vector too, but why negative rad, ehh?? Has to be replaced with [3][3] matrix once (ton) */
			s= sin(-rad);
			c= cos(-rad);
			centx= (float)cbuf->xof; centy= (float)cbuf->yof;
			stackbuf->xof= (int)( c*centx + s*centy);
			stackbuf->yof= (int)(-s*centx + c*centy);

			IMB_freeImBuf(ibuf);
			IMB_freeImBuf(obuf);
		}

		/* pass on output and free */
		out[0]->data= stackbuf;
		if(cbuf!=in[0]->data) {
			free_compbuf(cbuf);
		}
	}
}

static void node_composit_init_rotate(bNode *node)
{
	node->custom1= 1; /* Bilinear Filter*/
}

void register_node_type_cmp_rotate(ListBase *lb)
{
	static bNodeType ntype;

	node_type_base(&ntype, CMP_NODE_ROTATE, "Rotate", NODE_CLASS_DISTORT, NODE_OPTIONS,
		cmp_node_rotate_in, cmp_node_rotate_out);
	node_type_size(&ntype, 140, 100, 320);
	node_type_init(&ntype, node_composit_init_rotate);
	node_type_exec(&ntype, node_composit_exec_rotate);

	nodeRegisterType(lb, &ntype);
}