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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): none yet.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/nodes/composite/nodes/node_composite_brightness.c
* \ingroup cmpnodes
*/
#include "node_composite_util.h"
/* **************** Brigh and contrsast ******************** */
static bNodeSocketTemplate cmp_node_brightcontrast_in[]= {
{ SOCK_RGBA, 1, N_("Image"), 1.0f, 1.0f, 1.0f, 1.0f},
{ SOCK_FLOAT, 1, N_("Bright"), 0.0f, 0.0f, 0.0f, 0.0f, -100.0f, 100.0f, PROP_NONE},
{ SOCK_FLOAT, 1, N_("Contrast"), 0.0f, 0.0f, 0.0f, 0.0f, -100.0f, 100.0f, PROP_NONE},
{ -1, 0, "" }
};
static bNodeSocketTemplate cmp_node_brightcontrast_out[]= {
{ SOCK_RGBA, 0, N_("Image")},
{ -1, 0, "" }
};
#ifdef WITH_COMPOSITOR_LEGACY
static void do_brightnesscontrast(bNode *UNUSED(node), float *out, float *in, float *in_brightness, float *in_contrast)
{
float i;
int c;
float a, b, v;
float brightness = (*in_brightness) / 100.0f;
float contrast = *in_contrast;
float delta = contrast / 200.0f;
a = 1.0f - delta * 2.0f;
/*
* The algorithm is by Werner D. Streidt
* (http://visca.com/ffactory/archives/5-99/msg00021.html)
* Extracted of OpenCV demhist.c
*/
if (contrast > 0) {
a = 1.0f / a;
b = a * (brightness - delta);
}
else {
delta *= -1;
b = a * (brightness + delta);
}
for (c=0; c<3; c++) {
i = in[c];
v = a*i + b;
out[c] = v;
}
}
static void node_composit_exec_brightcontrast(void *UNUSED(data), bNode *node, bNodeStack **in, bNodeStack **out)
{
if (out[0]->hasoutput==0)
return;
if (in[0]->data) {
CompBuf *stackbuf, *cbuf= typecheck_compbuf(in[0]->data, CB_RGBA);
stackbuf= dupalloc_compbuf(cbuf);
composit3_pixel_processor(node, stackbuf, in[0]->data, in[0]->vec, in[1]->data, in[1]->vec, in[2]->data, in[2]->vec, do_brightnesscontrast, CB_RGBA, CB_VAL, CB_VAL);
out[0]->data = stackbuf;
if (cbuf != in[0]->data)
free_compbuf(cbuf);
}
}
#endif /* WITH_COMPOSITOR_LEGACY */
void register_node_type_cmp_brightcontrast(bNodeTreeType *ttype)
{
static bNodeType ntype;
node_type_base(ttype, &ntype, CMP_NODE_BRIGHTCONTRAST, "Bright/Contrast", NODE_CLASS_OP_COLOR, NODE_OPTIONS);
node_type_socket_templates(&ntype, cmp_node_brightcontrast_in, cmp_node_brightcontrast_out);
node_type_size(&ntype, 140, 100, 320);
#ifdef WITH_COMPOSITOR_LEGACY
node_type_exec(&ntype, node_composit_exec_brightcontrast);
#endif
nodeRegisterType(ttype, &ntype);
}
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