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/**
* $Id$
*
* ***** 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., 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 *****
*/
#include "../CMP_util.h"
/* **************** Brigh and contrsast ******************** */
static bNodeSocketType cmp_node_brightcontrast_in[]= {
{ SOCK_RGBA, 1, "Image", 0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
{ SOCK_VALUE, 1, "Bright", 0.0f, 0.0f, 0.0f, 0.0f, -100.0f, 100.0f},
{ SOCK_VALUE, 1, "Contrast", 0.0f, 0.0f, 0.0f, 0.0f, -100.0f, 100.0f},
{ -1, 0, "" }
};
static bNodeSocketType cmp_node_brightcontrast_out[]= {
{ SOCK_RGBA, 0, "Image", 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f},
{ -1, 0, "" }
};
static void do_brightnesscontrast(bNode *node, float *out, float *in)
{
float i;
int c;
float a, b, contrast, brightness, delta, v;
contrast = node->custom2;
brightness = (float)(node->custom1);
brightness = (brightness) / 100.0f;
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);
node->custom1 = in[1]->vec[0];
node->custom2 = in[2]->vec[0];
stackbuf= dupalloc_compbuf(cbuf);
composit1_pixel_processor(node, stackbuf, cbuf, in[0]->vec, do_brightnesscontrast, CB_RGBA);
out[0]->data = stackbuf;
if(cbuf != in[0]->data)
free_compbuf(cbuf);
}
}
bNodeType cmp_node_brightcontrast= {
/* *next,*prev */ NULL, NULL,
/* type code */ CMP_NODE_BRIGHTCONTRAST,
/* name */ "Bright/Contrast",
/* width+range */ 140, 100, 320,
/* class+opts */ NODE_CLASS_OP_COLOR, NODE_OPTIONS,
/* input sock */ cmp_node_brightcontrast_in,
/* output sock */ cmp_node_brightcontrast_out,
/* storage */ "",
/* execfunc */ node_composit_exec_brightcontrast,
/* butfunc */ NULL,
/* initfunc */ NULL,
/* freestoragefunc */ NULL,
/* copysotragefunc */ NULL,
/* id */ NULL
};
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