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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_diffMatte.c
* \ingroup cmpnodes
*/
#include "node_composite_util.h"
/* ******************* channel Difference Matte ********************************* */
static bNodeSocketTemplate cmp_node_diff_matte_in[]={
{SOCK_RGBA, 1, N_("Image 1"), 1.0f, 1.0f, 1.0f, 1.0f},
{SOCK_RGBA, 1, N_("Image 2"), 1.0f, 1.0f, 1.0f, 1.0f},
{-1, 0, ""}
};
static bNodeSocketTemplate cmp_node_diff_matte_out[]={
{SOCK_RGBA, 0, N_("Image")},
{SOCK_FLOAT, 0, N_("Matte")},
{-1, 0, ""}
};
static void do_diff_matte(bNode *node, float *outColor, float *inColor1, float *inColor2)
{
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 difference;
float alpha;
float maxInputAlpha;
/* average together the distances */
difference= fabs(inColor2[0]-inColor1[0]) +
fabs(inColor2[1]-inColor1[1]) +
fabs(inColor2[2]-inColor1[2]);
difference=difference/3.0f;
copy_v3_v3(outColor, inColor1);
if (difference <= tolerance) {
if (difference <= falloff) {
alpha = 0.0f;
}
else {
/* alpha as percent (distance / tolerance), each modified by falloff amount (in pixels)*/
alpha=(difference-falloff)/(tolerance-falloff);
}
/*only change if more transparent than either image */
maxInputAlpha=maxf(inColor1[3], inColor2[3]);
if (alpha < maxInputAlpha) {
/*clamp*/
if (alpha < 0.0f) alpha = 0.0f;
if (alpha > 1.0f) alpha = 1.0f;
outColor[3] = alpha;
}
else { /* leave as before */
outColor[3]=maxInputAlpha;
}
}
}
static void node_composit_exec_diff_matte(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
{
CompBuf *outbuf= NULL;
CompBuf *imbuf1= NULL;
CompBuf *imbuf2= NULL;
/* NodeChroma *c; */ /* UNUSED */
/*is anything connected?*/
if (out[0]->hasoutput==0 && out[1]->hasoutput==0) return;
/*must have an image imput*/
if (in[0]->data==NULL) return;
imbuf1=typecheck_compbuf(in[0]->data, CB_RGBA);
/* if there's an image, use that, if not use the color */
if (in[1]->data) {
imbuf2=typecheck_compbuf(in[1]->data, CB_RGBA);
}
/* c=node->storage; */ /* UNUSED */
outbuf=dupalloc_compbuf(imbuf1);
/* note, processor gets a keyvals array passed on as buffer constant */
composit2_pixel_processor(node, outbuf, imbuf1, in[0]->vec, imbuf2, in[1]->vec, do_diff_matte, CB_RGBA, CB_RGBA);
out[0]->data=outbuf;
if (out[1]->hasoutput)
out[1]->data=valbuf_from_rgbabuf(outbuf, CHAN_A);
generate_preview(data, node, outbuf);
if (imbuf1!=in[0]->data)
free_compbuf(imbuf1);
if (imbuf2!=in[1]->data)
free_compbuf(imbuf2);
}
static void node_composit_init_diff_matte(bNodeTree *UNUSED(ntree), bNode* node, bNodeTemplate *UNUSED(ntemp))
{
NodeChroma *c= MEM_callocN(sizeof(NodeChroma), "node chroma");
node->storage= c;
c->t1= 0.1f;
c->t2= 0.1f;
}
void register_node_type_cmp_diff_matte(bNodeTreeType *ttype)
{
static bNodeType ntype;
node_type_base(ttype, &ntype, CMP_NODE_DIFF_MATTE, "Difference Key", NODE_CLASS_MATTE, NODE_PREVIEW|NODE_OPTIONS);
node_type_socket_templates(&ntype, cmp_node_diff_matte_in, cmp_node_diff_matte_out);
node_type_size(&ntype, 200, 80, 250);
node_type_init(&ntype, node_composit_init_diff_matte);
node_type_storage(&ntype, "NodeChroma", node_free_standard_storage, node_copy_standard_storage);
node_type_exec(&ntype, node_composit_exec_diff_matte);
nodeRegisterType(ttype, &ntype);
}
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