149 lines
4.2 KiB
C
149 lines
4.2 KiB
C
/*
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* $Id$
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*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2006 Blender Foundation.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): Bob Holcomb
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file blender/nodes/intern/CMP_nodes/CMP_distanceMatte.c
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* \ingroup cmpnodes
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*/
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#include "../CMP_util.h"
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/* ******************* channel Distance Matte ********************************* */
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static bNodeSocketType cmp_node_distance_matte_in[]={
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{SOCK_RGBA,1,"Image", 0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
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{SOCK_RGBA,1,"Key Color", 0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
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{-1,0,""}
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};
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static bNodeSocketType cmp_node_distance_matte_out[]={
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{SOCK_RGBA,0,"Image", 0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
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{SOCK_VALUE,0,"Matte",0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f},
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{-1,0,""}
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};
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/* note, keyvals is passed on from caller as stack array */
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/* might have been nicer as temp struct though... */
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static void do_distance_matte(bNode *node, float *out, float *in)
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{
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NodeChroma *c= (NodeChroma *)node->storage;
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float tolerence=c->t1;
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float falloff=c->t2;
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float distance;
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float alpha;
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distance=sqrt((c->key[0]-in[0])*(c->key[0]-in[0]) +
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(c->key[1]-in[1])*(c->key[1]-in[1]) +
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(c->key[2]-in[2])*(c->key[2]-in[2]));
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VECCOPY(out, in);
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/*make 100% transparent */
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if(distance < tolerence) {
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out[3]=0.0;
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}
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/*in the falloff region, make partially transparent */
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else if(distance < falloff+tolerence){
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distance=distance-tolerence;
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alpha=distance/falloff;
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/*only change if more transparent than before */
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if(alpha < in[3]) {
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out[3]=alpha;
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}
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else { /* leave as before */
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out[3]=in[3];
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}
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}
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else {
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out[3]=in[3];
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}
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}
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static void node_composit_exec_distance_matte(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
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{
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/*
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Losely based on the Sequencer chroma key plug-in, but enhanced to work in other color spaces and
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uses a differnt difference function (suggested in forums of vfxtalk.com).
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*/
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CompBuf *workbuf;
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CompBuf *inbuf;
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NodeChroma *c;
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/*is anything connected?*/
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if(out[0]->hasoutput==0 && out[1]->hasoutput==0) return;
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/*must have an image imput*/
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if(in[0]->data==NULL) return;
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inbuf=typecheck_compbuf(in[0]->data, CB_RGBA);
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c=node->storage;
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workbuf=dupalloc_compbuf(inbuf);
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/*use the input color*/
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c->key[0]= in[1]->vec[0];
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c->key[1]= in[1]->vec[1];
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c->key[2]= in[1]->vec[2];
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/* note, processor gets a keyvals array passed on as buffer constant */
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composit1_pixel_processor(node, workbuf, workbuf, in[0]->vec, do_distance_matte, CB_RGBA);
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out[0]->data=workbuf;
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if(out[1]->hasoutput)
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out[1]->data=valbuf_from_rgbabuf(workbuf, CHAN_A);
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generate_preview(data, node, workbuf);
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if(inbuf!=in[0]->data)
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free_compbuf(inbuf);
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}
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static void node_composit_init_distance_matte(bNode *node)
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{
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NodeChroma *c= MEM_callocN(sizeof(NodeChroma), "node chroma");
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node->storage= c;
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c->t1= 0.1f;
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c->t2= 0.1f;
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}
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void register_node_type_cmp_distance_matte(ListBase *lb)
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{
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static bNodeType ntype;
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node_type_base(&ntype, CMP_NODE_DIST_MATTE, "Distance Key", NODE_CLASS_MATTE, NODE_PREVIEW|NODE_OPTIONS,
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cmp_node_distance_matte_in, cmp_node_distance_matte_out);
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node_type_size(&ntype, 200, 80, 250);
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node_type_init(&ntype, node_composit_init_distance_matte);
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node_type_storage(&ntype, "NodeChroma", node_free_standard_storage, node_copy_standard_storage);
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node_type_exec(&ntype, node_composit_exec_distance_matte);
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nodeRegisterType(lb, &ntype);
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}
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