node_texture_invert.c

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/*
 * ***** 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 *****
 */

#include "node_texture_util.h"
#include "NOD_texture.h"

/* **************** INVERT ******************** */ 
static bNodeSocketTemplate inputs[]= { 
    { SOCK_RGBA, 1, "Color", 0.0f, 0.0f, 0.0f, 1.0f}, 
    { -1, 0, "" } 
};

static bNodeSocketTemplate outputs[]= { 
    { SOCK_RGBA, 0, "Color"}, 
    { -1, 0, "" } 
};

static void colorfn(float *out, TexParams *p, bNode *UNUSED(node), bNodeStack **in, short thread)
{
    float col[4];
    
    tex_input_rgba(col, in[0], p, thread);

    col[0] = 1.0f - col[0];
    col[1] = 1.0f - col[1];
    col[2] = 1.0f - col[2];
    
    copy_v3_v3(out, col);
    out[3] = col[3];
}

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

void register_node_type_tex_invert(bNodeTreeType *ttype)
{
    static bNodeType ntype;
    
    node_type_base(ttype, &ntype, TEX_NODE_INVERT, "Invert", NODE_CLASS_OP_COLOR, NODE_OPTIONS);
    node_type_socket_templates(&ntype, inputs, outputs);
    node_type_size(&ntype, 90, 80, 100);
    node_type_exec(&ntype, exec);
    
    nodeRegisterType(ttype, &ntype);
}