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/*
* $Id$
*
* ***** 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 *****
*/
/** \file blender/nodes/intern/CMP_nodes/CMP_chromaMatte.c
* \ingroup cmpnodes
*/
#include "../CMP_util.h"
/* ******************* Chroma Key ********************************************************** */
static bNodeSocketType cmp_node_chroma_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_chroma_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,""}
};
static void do_rgba_to_ycca_normalized(bNode *UNUSED(node), float *out, float *in)
{
rgb_to_ycc(in[0],in[1],in[2], &out[0], &out[1], &out[2], BLI_YCC_ITU_BT601);
//normalize to 0..1.0
out[0]=out[0]/255.0;
out[1]=out[1]/255.0;
out[2]=out[2]/255.0;
//rescale to -1.0..1.0
out[0]=(out[0]*2.0)-1.0;
out[1]=(out[1]*2.0)-1.0;
out[2]=(out[2]*2.0)-1.0;
// out[0]=((out[0])-16)/255.0;
// out[1]=((out[1])-128)/255.0;
// out[2]=((out[2])-128)/255.0;
out[3]=in[3];
}
static void do_ycca_to_rgba_normalized(bNode *UNUSED(node), float *out, float *in)
{
/*un-normalize the normalize from above */
in[0]=(in[0]+1.0)/2.0;
in[1]=(in[1]+1.0)/2.0;
in[2]=(in[2]+1.0)/2.0;
in[0]=(in[0]*255.0);
in[1]=(in[1]*255.0);
in[2]=(in[2]*255.0);
// in[0]=(in[0]*255.0)+16;
// in[1]=(in[1]*255.0)+128;
// in[2]=(in[2]*255.0)+128;
ycc_to_rgb(in[0],in[1],in[2], &out[0], &out[1], &out[2], BLI_YCC_ITU_BT601);
out[3]=in[3];
}
static void do_chroma_key(bNode *node, float *out, float *in)
{
NodeChroma *c;
float x, z, alpha;
float theta, beta, angle, angle2;
float kfg;
c=node->storage;
/* Algorithm from book "Video Demistified," does not include the spill reduction part */
/* find theta, the angle that the color space should be rotated based on key*/
theta=atan2(c->key[2], c->key[1]);
/*rotate the cb and cr into x/z space */
x=in[1]*cos(theta)+in[2]*sin(theta);
z=in[2]*cos(theta)-in[1]*sin(theta);
/*if within the acceptance angle */
angle=c->t1*M_PI/180.0; /* convert to radians */
/* if kfg is <0 then the pixel is outside of the key color */
kfg=x-(fabs(z)/tan(angle/2.0));
out[0]=in[0];
out[1]=in[1];
out[2]=in[2];
if(kfg>0.0) { /* found a pixel that is within key color */
alpha=(1.0-kfg)*(c->fstrength);
beta=atan2(z,x);
angle2=c->t2*M_PI/180.0;
/* if beta is within the cutoff angle */
if(fabs(beta)<(angle2/2.0)) {
alpha=0.0;
}
/* don't make something that was more transparent less transparent */
if (alpha<in[3]) {
out[3]=alpha;
}
else {
out[3]=in[3];
}
}
else { /*pixel is outside key color */
out[0]=in[0];
out[1]=in[1];
out[2]=in[2];
out[3]=in[3]; /* make pixel just as transparent as it was before */
}
}
static void node_composit_exec_chroma_matte(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
{
CompBuf *cbuf;
CompBuf *chromabuf;
NodeChroma *c;
if(in[0]->hasinput==0) return;
if(in[0]->data==NULL) return;
if(out[0]->hasoutput==0 && out[1]->hasoutput==0) return;
cbuf= typecheck_compbuf(in[0]->data, CB_RGBA);
chromabuf= dupalloc_compbuf(cbuf);
c=node->storage;
/*convert rgbbuf to normalized chroma space*/
composit1_pixel_processor(node, chromabuf, cbuf, in[0]->vec, do_rgba_to_ycca_normalized, CB_RGBA);
/*convert key to normalized chroma color space */
do_rgba_to_ycca_normalized(node, c->key, in[1]->vec);
/*per pixel chroma key*/
composit1_pixel_processor(node, chromabuf, chromabuf, in[0]->vec, do_chroma_key, CB_RGBA);
/*convert back*/
composit1_pixel_processor(node, chromabuf, chromabuf, in[0]->vec, do_ycca_to_rgba_normalized, CB_RGBA);
out[0]->data= chromabuf;
if(out[1]->hasoutput)
out[1]->data= valbuf_from_rgbabuf(chromabuf, CHAN_A);
generate_preview(data, node, chromabuf);
if(cbuf!=in[0]->data)
free_compbuf(cbuf);
}
static void node_composit_init_chroma_matte(bNode *node)
{
NodeChroma *c= MEM_callocN(sizeof(NodeChroma), "node chroma");
node->storage= c;
c->t1= 30.0f;
c->t2= 10.0f;
c->t3= 0.0f;
c->fsize= 0.0f;
c->fstrength= 1.0f;
}
void register_node_type_cmp_chroma_matte(ListBase *lb)
{
static bNodeType ntype;
node_type_base(&ntype, CMP_NODE_CHROMA_MATTE, "Chroma Key", NODE_CLASS_MATTE, NODE_PREVIEW|NODE_OPTIONS,
cmp_node_chroma_in, cmp_node_chroma_out);
node_type_size(&ntype, 200, 80, 300);
node_type_init(&ntype, node_composit_init_chroma_matte);
node_type_storage(&ntype, "NodeChroma", node_free_standard_storage, node_copy_standard_storage);
node_type_exec(&ntype, node_composit_exec_chroma_matte);
nodeRegisterType(lb, &ntype);
}
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