node_texture_output.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) 2006 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"

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

/* applies to render pipeline */
static void exec(void *data, bNode *node, bNodeStack **in, bNodeStack **UNUSED(out))
{
    TexCallData *cdata = (TexCallData *)data;
    TexResult *target = cdata->target;
    
    if(cdata->do_preview) {
        TexParams params;
        params_from_cdata(&params, cdata);

        if(in[1] && in[1]->hasinput && !in[0]->hasinput)
            tex_input_rgba(&target->tr, in[1], &params, cdata->thread);
        else
            tex_input_rgba(&target->tr, in[0], &params, cdata->thread);
        tex_do_preview(node, params.co, &target->tr);
    }
    else {
        /* 0 means don't care, so just use first */
        if(cdata->which_output == node->custom1 || (cdata->which_output == 0 && node->custom1 == 1)) {
            TexParams params;
            params_from_cdata(&params, cdata);
            
            tex_input_rgba(&target->tr, in[0], &params, cdata->thread);
        
            target->tin = (target->tr + target->tg + target->tb) / 3.0f;
            target->talpha = 1;
        
            if(target->nor) {
                if(in[1] && in[1]->hasinput)
                    tex_input_vec(target->nor, in[1], &params, cdata->thread);
                else
                    target->nor = NULL;
            }
        }
    }
}

static void unique_name(bNode *node)
{
    TexNodeOutput *tno = (TexNodeOutput *)node->storage;
    char *new_name = NULL;
    int new_len = 0;
    int suffix;
    bNode *i;
    char *name = tno->name;
    
    i = node;
    while(i->prev) i = i->prev;
    for(; i; i=i->next) {
        if(
            i == node ||
            i->type != TEX_NODE_OUTPUT ||
            strcmp(name, ((TexNodeOutput*)(i->storage))->name)
        )
            continue;
        
        if(!new_name) {
            int len = strlen(name);
            if(len >= 4 && sscanf(name + len - 4, ".%03d", &suffix) == 1) {
                new_len = len;
            } else {
                suffix = 0;
                new_len = len + 4;
                if(new_len > (sizeof(tno->name) - 1))
                    new_len = (sizeof(tno->name) - 1);
            }
            
            new_name = MEM_mallocN(new_len + 1, "new_name");
            strcpy(new_name, name);
            name = new_name;
        }
        sprintf(new_name + new_len - 4, ".%03d", ++suffix);
    }
    
    if(new_name) {
        strcpy(tno->name, new_name);
        MEM_freeN(new_name);
    }
}

static void assign_index(struct bNode *node)
{
    bNode *tnode;
    int index = 1;
    
    tnode = node;
    while(tnode->prev)
        tnode = tnode->prev;
    
    check_index:
    for(; tnode; tnode= tnode->next)
        if(tnode->type == TEX_NODE_OUTPUT && tnode != node)
            if(tnode->custom1 == index) {
                index ++;
                goto check_index;
            }
            
    node->custom1 = index;
}

static void init(bNodeTree *UNUSED(ntree), bNode* node, bNodeTemplate *UNUSED(ntemp))
{
    TexNodeOutput *tno = MEM_callocN(sizeof(TexNodeOutput), "TEX_output");
    node->storage= tno;
    
    strcpy(tno->name, "Default");
    unique_name(node);
    assign_index(node);
}

static void copy(bNode *orig, bNode *new)
{
    node_copy_standard_storage(orig, new);
    unique_name(new);
    assign_index(new);
}

void register_node_type_tex_output(bNodeTreeType *ttype)
{
    static bNodeType ntype;
    
    node_type_base(ttype, &ntype, TEX_NODE_OUTPUT, "Output", NODE_CLASS_OUTPUT, NODE_PREVIEW|NODE_OPTIONS);
    node_type_socket_templates(&ntype, inputs, NULL);
    node_type_size(&ntype, 150, 60, 200);
    node_type_init(&ntype, init);
    node_type_storage(&ntype, "TexNodeOutput", node_free_standard_storage, copy);
    node_type_exec(&ntype, exec);
    
    /* Do not allow muting output. */
    node_type_mute(&ntype, NULL, NULL);
    
    nodeRegisterType(ttype, &ntype);
}