1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
/**
* $Id$
*
* ***** 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"
/* ******************* channel Difference Matte ********************************* */
static bNodeSocketType cmp_node_diff_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_diff_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_diff_matte(bNode *node, float *colorbuf, float *inbuf, float *keyvals)
{
NodeChroma *c= (NodeChroma *)node->storage;
float *keymin= keyvals;
float *keymax= keyvals+3;
float *key= keyvals+6;
float tolerance= keyvals[9];
float distance, alpha;
/*process the pixel if it is close to the key or already transparent*/
if(((colorbuf[0]>keymin[0] && colorbuf[0]<keymax[0]) &&
(colorbuf[1]>keymin[1] && colorbuf[1]<keymax[1]) &&
(colorbuf[2]>keymin[2] && colorbuf[2]<keymax[2])) || inbuf[3]<1.0f) {
/*true distance from key*/
distance= sqrt((colorbuf[0]-key[0])*(colorbuf[0]-key[0])+
(colorbuf[1]-key[1])*(colorbuf[1]-key[1])+
(colorbuf[2]-key[2])*(colorbuf[2]-key[2]));
/*is it less transparent than the prevous pixel*/
alpha= distance/tolerance;
if(alpha > inbuf[3]) alpha= inbuf[3];
if(alpha > c->fstrength) alpha= 0.0f;
/*clamp*/
if (alpha>1.0f) alpha=1.0f;
if (alpha<0.0f) alpha=0.0f;
/*premultiplied picture*/
colorbuf[3]= alpha;
}
else {
/*foreground object*/
colorbuf[3]= inbuf[3];
}
}
static void node_composit_exec_diff_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;
float keyvals[10];
float *keymin= keyvals;
float *keymax= keyvals+3;
float *key= keyvals+6;
float *tolerance= keyvals+9;
float t[3];
/*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*/
key[0]= in[1]->vec[0];
key[1]= in[1]->vec[1];
key[2]= in[1]->vec[2];
/*get the tolerances from the UI*/
t[0]=c->t1;
t[1]=c->t2;
t[2]=c->t3;
/*convert to colorspace*/
switch(node->custom1) {
case 1: /*RGB*/
break;
case 2: /*HSV*/
/*convert the key (in place)*/
rgb_to_hsv(key[0], key[1], key[2], &key[0], &key[1], &key[2]);
composit1_pixel_processor(node, workbuf, inbuf, in[1]->vec, do_rgba_to_hsva, CB_RGBA);
break;
case 3: /*YUV*/
rgb_to_yuv(key[0], key[1], key[2], &key[0], &key[1], &key[2]);
composit1_pixel_processor(node, workbuf, inbuf, in[1]->vec, do_rgba_to_yuva, CB_RGBA);
break;
case 4: /*YCC*/
rgb_to_ycc(key[0], key[1], key[2], &key[0], &key[1], &key[2]);
composit1_pixel_processor(node, workbuf, inbuf, in[1]->vec, do_rgba_to_ycca, CB_RGBA);
/*account for ycc is on a 0..255 scale*/
t[0]= c->t1*255.0;
t[1]= c->t2*255.0;
t[2]= c->t3*255.0;
break;
default:
break;
}
/*find min/max tolerances*/
keymin[0]= key[0]-t[0];
keymin[1]= key[1]-t[1];
keymin[2]= key[2]-t[2];
keymax[0]= key[0]+t[0];
keymax[1]= key[1]+t[1];
keymax[2]= key[2]+t[2];
/*tolerance*/
*tolerance= sqrt((t[0])*(t[0])+
(t[1])*(t[1])+
(t[2])*(t[2]));
/* note, processor gets a keyvals array passed on as buffer constant */
composit2_pixel_processor(node, workbuf, workbuf, in[0]->vec, NULL, keyvals, do_diff_matte, CB_RGBA, CB_VAL);
/*convert back to RGB colorspace*/
switch(node->custom1) {
case 1: /*RGB*/
composit1_pixel_processor(node, workbuf, workbuf, in[1]->vec, do_copy_rgba, CB_RGBA);
break;
case 2: /*HSV*/
composit1_pixel_processor(node, workbuf, workbuf, in[1]->vec, do_hsva_to_rgba, CB_RGBA);
break;
case 3: /*YUV*/
composit1_pixel_processor(node, workbuf, workbuf, in[1]->vec, do_yuva_to_rgba, CB_RGBA);
break;
case 4: /*YCC*/
composit1_pixel_processor(node, workbuf, workbuf, in[1]->vec, do_ycca_to_rgba, CB_RGBA);
break;
default:
break;
}
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_diff_matte(bNode *node)
{
NodeChroma *c= MEM_callocN(sizeof(NodeChroma), "node chroma");
node->storage= c;
c->t1= 0.01f;
c->t2= 0.01f;
c->t3= 0.01f;
c->fsize= 0.0f;
c->fstrength= 0.0f;
node->custom1= 1; /* RGB */
}
bNodeType cmp_node_diff_matte={
/* *next,*prev */ NULL, NULL,
/* type code */ CMP_NODE_DIFF_MATTE,
/* name */ "Difference Key",
/* width+range */ 200, 80, 250,
/* class+opts */ NODE_CLASS_MATTE, NODE_PREVIEW|NODE_OPTIONS,
/* input sock */ cmp_node_diff_matte_in,
/* output sock */ cmp_node_diff_matte_out,
/* storage */ "NodeChroma",
/* execfunc */ node_composit_exec_diff_matte,
/* butfunc */ NULL,
/* initfunc */ node_composit_init_diff_matte,
/* freestoragefunc */ node_free_standard_storage,
/* copystoragefunc */ node_copy_standard_storage,
/* id */ NULL
};
|
