SHD_texture.c

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/*
 * $Id: SHD_texture.c 35385 2011-03-07 11:51:09Z ton $
 *
 * ***** 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): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "DNA_texture_types.h"

#include "../SHD_util.h"

/* **************** TEXTURE ******************** */
static bNodeSocketType sh_node_texture_in[]= {
        {       SOCK_VECTOR, 1, "Vector",       0.0f, 0.0f, 0.0f, 1.0f, -1.0f, 1.0f},   /* no limit */
        {       -1, 0, ""       }
};
static bNodeSocketType sh_node_texture_out[]= {
        {       SOCK_VALUE, 0, "Value",         1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f},
        {       SOCK_RGBA , 0, "Color",         1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f},
        {       SOCK_VECTOR, 0, "Normal",       0.0f, 0.0f, 0.0f, 1.0f, -1.0f, 1.0f},
        {       -1, 0, ""       }
};

static void node_shader_exec_texture(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
{
        if(data && node->id) {
                ShadeInput *shi= ((ShaderCallData *)data)->shi;
                TexResult texres;
                float vec[3], nor[3]={0.0f, 0.0f, 0.0f};
                int retval;
                short which_output = node->custom1;
                
                short thread = shi->thread;
                
                /* out: value, color, normal */
                
                /* we should find out if a normal as output is needed, for now we do all */
                texres.nor= nor;
                texres.tr= texres.tg= texres.tb= 0.0f;
                
                if(in[0]->hasinput) {
                        nodestack_get_vec(vec, SOCK_VECTOR, in[0]);
                        
                        if(in[0]->datatype==NS_OSA_VECTORS) {
                                float *fp= in[0]->data;
                                retval= multitex_nodes((Tex *)node->id, vec, fp, fp+3, shi->osatex, &texres, thread, which_output, NULL, NULL);
                        }
                        else if(in[0]->datatype==NS_OSA_VALUES) {
                                float *fp= in[0]->data;
                                float dxt[3], dyt[3];
                                
                                dxt[0]= fp[0]; dxt[1]= dxt[2]= 0.0f;
                                dyt[0]= fp[1]; dyt[1]= dyt[2]= 0.0f;
                                retval= multitex_nodes((Tex *)node->id, vec, dxt, dyt, shi->osatex, &texres, thread, which_output, NULL, NULL);
                        }
                        else
                                retval= multitex_nodes((Tex *)node->id, vec, NULL, NULL, 0, &texres, thread, which_output, NULL, NULL);
                }
                else {
                        VECCOPY(vec, shi->lo);
                        retval= multitex_nodes((Tex *)node->id, vec, NULL, NULL, 0, &texres, thread, which_output, NULL, NULL);
                }
                
                /* stupid exception */
                if( ((Tex *)node->id)->type==TEX_STUCCI) {
                        texres.tin= 0.5f + 0.7f*texres.nor[0];
                        CLAMP(texres.tin, 0.0f, 1.0f);
                }
                
                /* intensity and color need some handling */
                if(texres.talpha)
                        out[0]->vec[0]= texres.ta;
                else
                        out[0]->vec[0]= texres.tin;
                
                if((retval & TEX_RGB)==0) {
                        out[1]->vec[0]= out[0]->vec[0];
                        out[1]->vec[1]= out[0]->vec[0];
                        out[1]->vec[2]= out[0]->vec[0];
                        out[1]->vec[3]= 1.0f;
                }
                else {
                        out[1]->vec[0]= texres.tr;
                        out[1]->vec[1]= texres.tg;
                        out[1]->vec[2]= texres.tb;
                        out[1]->vec[3]= 1.0f;
                }
                
                VECCOPY(out[2]->vec, nor);
                
                if(shi->do_preview)
                        nodeAddToPreview(node, out[1]->vec, shi->xs, shi->ys, shi->do_manage);
                
        }
}

static int gpu_shader_texture(GPUMaterial *mat, bNode *node, GPUNodeStack *in, GPUNodeStack *out)
{
        Tex *tex = (Tex*)node->id;

        if(tex && tex->type == TEX_IMAGE && tex->ima) {
                GPUNodeLink *texlink = GPU_image(tex->ima, NULL);
                return GPU_stack_link(mat, "texture_image", in, out, texlink);
        }
        else
                return 0;
}

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

        node_type_base(&ntype, SH_NODE_TEXTURE, "Texture", NODE_CLASS_INPUT, NODE_OPTIONS|NODE_PREVIEW,
                sh_node_texture_in, sh_node_texture_out);
        node_type_size(&ntype, 120, 80, 240);
        node_type_exec(&ntype, node_shader_exec_texture);
        node_type_gpu(&ntype, gpu_shader_texture);

        nodeRegisterType(lb, &ntype);
}