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/**
* $Id: CMP_diffMatte.c 12931 2007-12-17 18:20:48Z theeth $
*
* ***** 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2006 Blender Foundation.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): Bob Holcomb
*
* ***** END GPL LICENSE BLOCK *****
*/
#include "../CMP_util.h"
/* ******************* channel Distance Matte ********************************* */
static bNodeSocketType cmp_node_distance_matte_in[]={
{SOCK_RGBA,1,"Image", 0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
{SOCK_RGBA,1,"Key Color", 0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
{-1,0,""}
};
static bNodeSocketType cmp_node_distance_matte_out[]={
{SOCK_RGBA,0,"Image", 0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
{SOCK_VALUE,0,"Matte",0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f},
{-1,0,""}
};
/* note, keyvals is passed on from caller as stack array */
/* might have been nicer as temp struct though... */
static void do_distance_matte(bNode *node, float *out, float *in)
{
NodeChroma *c= (NodeChroma *)node->storage;
float tolerence=c->t1;
float falloff=c->t2;
float distance;
float alpha;
distance=sqrt((c->key[0]-in[0])*(c->key[0]-in[0]) +
(c->key[1]-in[1])*(c->key[1]-in[1]) +
(c->key[2]-in[2])*(c->key[2]-in[2]));
VECCOPY(out, in);
/*make 100% transparent */
if(distance < tolerence) {
out[3]=0.0;
}
/*in the falloff region, make partially transparent */
else if(distance < falloff+tolerence){
distance=distance-tolerence;
alpha=distance/falloff;
/*only change if more transparent than before */
if(alpha < in[3]) {
out[3]=alpha;
}
else { /* leave as before */
out[3]=in[3];
}
}
else {
out[3]=in[3];
}
}
static void node_composit_exec_distance_matte(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
{
/*
Losely based on the Sequencer chroma key plug-in, but enhanced to work in other color spaces and
uses a differnt difference function (suggested in forums of vfxtalk.com).
*/
CompBuf *workbuf;
CompBuf *inbuf;
NodeChroma *c;
/*is anything connected?*/
if(out[0]->hasoutput==0 && out[1]->hasoutput==0) return;
/*must have an image imput*/
if(in[0]->data==NULL) return;
inbuf=typecheck_compbuf(in[0]->data, CB_RGBA);
c=node->storage;
workbuf=dupalloc_compbuf(inbuf);
/*use the input color*/
c->key[0]= in[1]->vec[0];
c->key[1]= in[1]->vec[1];
c->key[2]= in[1]->vec[2];
/* note, processor gets a keyvals array passed on as buffer constant */
composit1_pixel_processor(node, workbuf, workbuf, in[0]->vec, do_distance_matte, CB_RGBA);
out[0]->data=workbuf;
if(out[1]->hasoutput)
out[1]->data=valbuf_from_rgbabuf(workbuf, CHAN_A);
generate_preview(node, workbuf);
if(inbuf!=in[0]->data)
free_compbuf(inbuf);
}
static void node_composit_init_distance_matte(bNode *node)
{
NodeChroma *c= MEM_callocN(sizeof(NodeChroma), "node chroma");
node->storage= c;
c->t1= 0.1f;
c->t2= 0.1f;
}
bNodeType cmp_node_distance_matte={
/* *next,*prev */ NULL, NULL,
/* type code */ CMP_NODE_DIST_MATTE,
/* name */ "Distance Key",
/* width+range */ 200, 80, 250,
/* class+opts */ NODE_CLASS_MATTE, NODE_PREVIEW|NODE_OPTIONS,
/* input sock */ cmp_node_distance_matte_in,
/* output sock */ cmp_node_distance_matte_out,
/* storage */ "NodeChroma",
/* execfunc */ node_composit_exec_distance_matte,
/* butfunc */ NULL,
/* initfunc */ node_composit_init_distance_matte,
/* freestoragefunc */ node_free_standard_storage,
/* copystoragefunc */ node_copy_standard_storage,
/* id */ NULL
};
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