/*
 *
 * ***** 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) 2005 Blender Foundation.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): Robin Allen
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/** \file blender/nodes/intern/TEX_nodes/TEX_texture.c
 *  \ingroup texnodes
 */


#include "../TEX_util.h"
#include "TEX_node.h"

#include "RE_shader_ext.h"

static bNodeSocketType inputs[]= {
	{ SOCK_RGBA, 1, "Color1", 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f },
	{ SOCK_RGBA, 1, "Color2", 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f },
	{ -1, 0, "" }
};

static bNodeSocketType outputs[]= {
	{ SOCK_RGBA, 0, "Color", 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f },
	{ -1, 0, "" }
};

static void colorfn(float *out, TexParams *p, bNode *node, bNodeStack **in, short thread)
{
	static float red[] = {1,0,0,1};
	static float white[] = {1,1,1,1};
	float *co = p->co;
	
	Tex *nodetex = (Tex *)node->id;
	
	if(node->custom2 || node->need_exec==0) {
		/* this node refers to its own texture tree! */
		QUATCOPY(
			out,
			(fabs(co[0] - co[1]) < .01) ? white : red 
		);
	}
	else if(nodetex) {
		TexResult texres;
		int textype;
		float nor[] = {0,0,0};
		float col1[4], col2[4];
		
		tex_input_rgba(col1, in[0], p, thread);
		tex_input_rgba(col2, in[1], p, thread);
		
		texres.nor = nor;
		textype = multitex_nodes(nodetex, co, p->dxt, p->dyt, p->osatex,
			&texres, thread, 0, p->shi, p->mtex);
		
		if(textype & TEX_RGB) {
			QUATCOPY(out, &texres.tr);
		}
		else {
			QUATCOPY(out, col1);
			ramp_blend(MA_RAMP_BLEND, out, out+1, out+2, texres.tin, col2);
		}
	}
}

static void exec(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
{
	tex_output(node, in, out[0], &colorfn, data);
}

void register_node_type_tex_texture(ListBase *lb)
{
	static bNodeType ntype;
	
	node_type_base(&ntype, TEX_NODE_TEXTURE, "Texture", NODE_CLASS_INPUT, NODE_PREVIEW|NODE_OPTIONS,
				   inputs, outputs);
	node_type_size(&ntype, 120, 80, 240);
	node_type_exec(&ntype, exec);
	
	nodeRegisterType(lb, &ntype);
}