node_composite_idMask.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): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "node_composite_util.h"


/* **************** ID Mask  ******************** */

static bNodeSocketTemplate cmp_node_idmask_in[]= {
    {   SOCK_FLOAT, 1, "ID value",          1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, PROP_NONE},
    {   -1, 0, ""   }
};
static bNodeSocketTemplate cmp_node_idmask_out[]= {
    {   SOCK_FLOAT, 0, "Alpha"},
    {   -1, 0, ""   }
};

/* stackbuf should be zeroed */
static void do_idmask(CompBuf *stackbuf, CompBuf *cbuf, float idnr)
{
    float *rect;
    int x;
    char *abuf= MEM_mapallocN(cbuf->x*cbuf->y, "anti ali buf");
    
    rect= cbuf->rect;
    for(x= cbuf->x*cbuf->y - 1; x>=0; x--)
        if(rect[x]==idnr)
            abuf[x]= 255;
    
    antialias_tagbuf(cbuf->x, cbuf->y, abuf);
    
    rect= stackbuf->rect;
    for(x= cbuf->x*cbuf->y - 1; x>=0; x--)
        if(abuf[x]>1)
            rect[x]= (1.0f/255.0f)*(float)abuf[x];
    
    MEM_freeN(abuf);
}

/* full sample version */
static void do_idmask_fsa(CompBuf *stackbuf, CompBuf *cbuf, float idnr)
{
    float *rect, *rs;
    int x;
    
    rect= cbuf->rect;
    rs= stackbuf->rect;
    for(x= cbuf->x*cbuf->y - 1; x>=0; x--)
        if(rect[x]==idnr)
            rs[x]= 1.0f;
    
}


static void node_composit_exec_idmask(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
{
    RenderData *rd= data;
    
    if(out[0]->hasoutput==0)
        return;
    
    if(in[0]->data) {
        CompBuf *cbuf= in[0]->data;
        CompBuf *stackbuf;
        
        if(cbuf->type!=CB_VAL)
            return;
        
        stackbuf= alloc_compbuf(cbuf->x, cbuf->y, CB_VAL, 1); /* allocs */;
        
        if((rd->scemode & R_FULL_SAMPLE) || node->custom2 == 0)
            do_idmask_fsa(stackbuf, cbuf, (float)node->custom1);
        else
            do_idmask(stackbuf, cbuf, (float)node->custom1);
        
        out[0]->data= stackbuf;
    }
}


void register_node_type_cmp_idmask(bNodeTreeType *ttype)
{
    static bNodeType ntype;

    node_type_base(ttype, &ntype, CMP_NODE_ID_MASK, "ID Mask", NODE_CLASS_CONVERTOR, NODE_OPTIONS);
    node_type_socket_templates(&ntype, cmp_node_idmask_in, cmp_node_idmask_out);
    node_type_size(&ntype, 140, 100, 320);
    node_type_exec(&ntype, node_composit_exec_idmask);

    nodeRegisterType(ttype, &ntype);
}