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/*
* ***** 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): Bob Holcomb
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/nodes/composite/nodes/node_composite_distanceMatte.c
* \ingroup cmpnodes
*/
#include "node_composite_util.h"
/* ******************* channel Distance Matte ********************************* */
static bNodeSocketTemplate cmp_node_distance_matte_in[]={
{SOCK_RGBA, 1, N_("Image"), 1.0f, 1.0f, 1.0f, 1.0f},
{SOCK_RGBA, 1, N_("Key Color"), 1.0f, 1.0f, 1.0f, 1.0f},
{-1, 0, ""}
};
static bNodeSocketTemplate cmp_node_distance_matte_out[]={
{SOCK_RGBA, 0, N_("Image")},
{SOCK_FLOAT, 0, N_("Matte")},
{-1, 0, ""}
};
#ifdef WITH_COMPOSITOR_LEGACY
/* 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 tolerance=c->t1;
float fper=c->t2;
/* get falloff amount over tolerance size */
float falloff=(1.0f-fper) * tolerance;
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]));
copy_v3_v3(out, in);
if (distance <= tolerance) {
if (distance <= falloff) {
alpha = 0.0f;
}
else {
/* alpha as percent (distance / tolerance), each modified by falloff amount (in pixels)*/
alpha=(distance-falloff)/(tolerance-falloff);
}
/*only change if more transparent than before */
if (alpha < in[3]) {
/*clamp*/
if (alpha < 0.0f) alpha = 0.0f;
if (alpha > 1.0f) alpha = 1.0f;
out[3]=alpha;
}
else { /* leave as before */
out[3]=in[3];
}
}
}
static void do_chroma_distance_matte(bNode *node, float *out, float *in)
{
NodeChroma *c= (NodeChroma *)node->storage;
float tolerance=c->t1;
float fper=c->t2;
/* get falloff amount over tolerance size */
float falloff=(1.0f-fper) * tolerance;
float y_key, cb_key, cr_key;
float y_pix, cb_pix, cr_pix;
float distance;
float alpha;
/*convert key to chroma colorspace */
rgb_to_ycc(c->key[0], c->key[1], c->key[2], &y_key, &cb_key, &cr_key, BLI_YCC_JFIF_0_255);
/* normalize the values */
cb_key=cb_key/255.0f;
cr_key=cr_key/255.0f;
/*convert pixel to chroma colorspace */
rgb_to_ycc(in[0], in[1], in[2], &y_pix, &cb_pix, &cr_pix, BLI_YCC_JFIF_0_255);
/*normalize the values */
cb_pix=cb_pix/255.0f;
cr_pix=cr_pix/255.0f;
distance=sqrt((cb_key-cb_pix)*(cb_key-cb_pix) +
(cr_key-cr_pix)*(cr_key-cr_pix));
copy_v3_v3(out, in);
if (distance <= tolerance) {
if (distance <= falloff) {
alpha = 0.0f;
}
else {
/* alpha as percent (distance / tolerance), each modified by falloff amount (in pixels)*/
alpha=(distance-falloff)/(tolerance-falloff);
}
/*only change if more transparent than before */
if (alpha < in[3]) {
/*clamp*/
if (alpha < 0.0f) alpha = 0.0f;
if (alpha > 1.0f) alpha = 1.0f;
out[3]=alpha;
}
else { /* leave as before */
out[3]=in[3];
}
}
}
static void node_composit_exec_distance_matte(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
{
/*
* Loosely based on the Sequencer chroma key plug-in, but enhanced to work in other color spaces and
* uses a different 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];
/* work in RGB color space */
if (c->channel == 1) {
/* 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);
}
/* work in YCbCr color space */
else {
composit1_pixel_processor(node, workbuf, workbuf, in[0]->vec, do_chroma_distance_matte, CB_RGBA);
}
out[0]->data=workbuf;
if (out[1]->hasoutput)
out[1]->data=valbuf_from_rgbabuf(workbuf, CHAN_A);
generate_preview(data, node, workbuf);
if (inbuf!=in[0]->data)
free_compbuf(inbuf);
}
#endif /* WITH_COMPOSITOR_LEGACY */
static void node_composit_init_distance_matte(bNodeTree *UNUSED(ntree), bNode *node, bNodeTemplate *UNUSED(ntemp))
{
NodeChroma *c= MEM_callocN(sizeof(NodeChroma), "node chroma");
node->storage= c;
c->channel=1;
c->t1= 0.1f;
c->t2= 0.1f;
}
void register_node_type_cmp_distance_matte(bNodeTreeType *ttype)
{
static bNodeType ntype;
node_type_base(ttype, &ntype, CMP_NODE_DIST_MATTE, "Distance Key", NODE_CLASS_MATTE, NODE_PREVIEW|NODE_OPTIONS);
node_type_socket_templates(&ntype, cmp_node_distance_matte_in, cmp_node_distance_matte_out);
node_type_size(&ntype, 200, 80, 250);
node_type_init(&ntype, node_composit_init_distance_matte);
node_type_storage(&ntype, "NodeChroma", node_free_standard_storage, node_copy_standard_storage);
#ifdef WITH_COMPOSITOR_LEGACY
node_type_exec(&ntype, node_composit_exec_distance_matte);
#endif
nodeRegisterType(ttype, &ntype);
}
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