219 lines
6.5 KiB
C
219 lines
6.5 KiB
C
/**
|
|
* $Id$
|
|
*
|
|
* ***** 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., 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): none yet.
|
|
*
|
|
* ***** END GPL LICENSE BLOCK *****
|
|
*/
|
|
|
|
#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 *node, float *out, float *in)
|
|
{
|
|
/*normalize to the range -1.0 to 1.0) */
|
|
rgb_to_ycc(in[0],in[1],in[2], &out[0], &out[1], &out[2]);
|
|
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 *node, float *out, float *in)
|
|
{
|
|
/*un-normalize the normalize from above */
|
|
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]);
|
|
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;
|
|
float kfg, newY, newCb, newCr;
|
|
|
|
c=node->storage;
|
|
|
|
/* Algorithm from book "Video Demistified" */
|
|
|
|
/* 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));
|
|
|
|
if(kfg>0.0) { /* found a pixel that is within key color */
|
|
|
|
newY=in[0]-(1-c->t3)*kfg;
|
|
newCb=in[1]-kfg*cosf(theta);
|
|
newCr=in[2]-kfg*sinf(theta);
|
|
alpha=(kfg+c->fsize)*(c->fstrength);
|
|
|
|
beta=atan2(newCr,newCb);
|
|
beta=beta*180.0/M_PI; /* convert to degrees for compare*/
|
|
|
|
/* if beta is within the clippin angle */
|
|
if(fabs(beta)<(c->t2/2.0)) {
|
|
newCb=0.0;
|
|
newCr=0.0;
|
|
alpha=0.0;
|
|
}
|
|
|
|
out[0]=newY;
|
|
out[1]=newCb;
|
|
out[2]=newCr;
|
|
|
|
/* 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(node, chromabuf);
|
|
|
|
if(cbuf!=in[0]->data)
|
|
free_compbuf(cbuf);
|
|
};
|
|
|
|
static int node_composit_buts_chroma_matte(uiBlock *block, bNodeTree *ntree, bNode *node, rctf *butr)
|
|
{
|
|
if(block) {
|
|
short dx=(butr->xmax-butr->xmin)/2;
|
|
NodeChroma *c= node->storage;
|
|
uiBlockBeginAlign(block);
|
|
|
|
uiDefButF(block, NUMSLI, B_NODE_EXEC+node->nr, "Acceptance ",
|
|
butr->xmin, butr->ymin+60, butr->xmax-butr->xmin, 20,
|
|
&c->t1, 1.0f, 80.0f, 100, 0, "Tolerance for colors to be considered a keying color");
|
|
uiDefButF(block, NUMSLI, B_NODE_EXEC+node->nr, "Cutoff ",
|
|
butr->xmin, butr->ymin+40, butr->xmax-butr->xmin, 20,
|
|
&c->t2, 0.0f, 30.0f, 100, 0, "Colors below this will be considered as exact matches for keying color");
|
|
|
|
uiDefButF(block, NUMSLI, B_NODE_EXEC+node->nr, "Lift ",
|
|
butr->xmin, butr->ymin+20, dx, 20,
|
|
&c->fsize, 0.0f, 1.0f, 100, 0, "Alpha Lift");
|
|
uiDefButF(block, NUMSLI, B_NODE_EXEC+node->nr, "Gain ",
|
|
butr->xmin+dx, butr->ymin+20, dx, 20,
|
|
&c->fstrength, 0.0f, 1.0f, 100, 0, "Alpha Gain");
|
|
|
|
uiDefButF(block, NUMSLI, B_NODE_EXEC+node->nr, "Shadow Adjust ",
|
|
butr->xmin, butr->ymin, butr->xmax-butr->xmin, 20,
|
|
&c->t3, 0.0f, 1.0f, 100, 0, "Adjusts the brightness of any shadows captured");
|
|
|
|
if(c->t2 > c->t1)
|
|
c->t2=c->t1;
|
|
}
|
|
return 80;
|
|
}
|
|
|
|
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;
|
|
};
|
|
|
|
bNodeType cmp_node_chroma={
|
|
/* type code */ CMP_NODE_CHROMA,
|
|
/* name */ "Chroma Key",
|
|
/* width+range */ 200, 80, 300,
|
|
/* class+opts */ NODE_CLASS_MATTE, NODE_PREVIEW|NODE_OPTIONS,
|
|
/* input sock */ cmp_node_chroma_in,
|
|
/* output sock */ cmp_node_chroma_out,
|
|
/* storage */ "NodeChroma",
|
|
/* execfunc */ node_composit_exec_chroma_matte,
|
|
/* butfunc */ node_composit_buts_chroma_matte,
|
|
node_composit_init_chroma_matte
|
|
};
|
|
|
|
|