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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"
/* **************** Gamma Tools ******************** */
static bNodeSocketType cmp_node_gamma_in[]= {
{ SOCK_RGBA, 1, "Image", 0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
{ SOCK_VALUE, 1, "Gamma", 1.0f, 0.0f, 0.0f, 0.0f, 0.001f, 10.0f},
{ -1, 0, "" }
};
static bNodeSocketType cmp_node_gamma_out[]= {
{ SOCK_RGBA, 0, "Image", 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f},
{ -1, 0, "" }
};
static void do_gamma(bNode *UNUSED(node), float *out, float *in, float *fac)
{
int i=0;
for(i=0; i<3; i++) {
/* check for negative to avoid nan's */
out[i] = (in[i] > 0.0f)? pow(in[i],fac[0]): in[i];
}
out[3] = in[3];
}
static void node_composit_exec_gamma(void *UNUSED(data), bNode *node, bNodeStack **in, bNodeStack **out)
{
/* stack order in: Fac, Image */
/* stack order out: Image */
if(out[0]->hasoutput==0) return;
/* input no image? then only color operation */
if(in[0]->data==NULL) {
do_gamma(node, out[0]->vec, in[0]->vec, in[1]->vec);
}
else {
/* make output size of input image */
CompBuf *cbuf= in[0]->data;
CompBuf *stackbuf= alloc_compbuf(cbuf->x, cbuf->y, CB_RGBA, 1); // allocs
composit2_pixel_processor(node, stackbuf, cbuf, in[0]->vec, in[1]->data, in[1]->vec, do_gamma, CB_RGBA, CB_VAL);
out[0]->data= stackbuf;
}
}
bNodeType cmp_node_gamma= {
/* *next,*prev */ NULL, NULL,
/* type code */ CMP_NODE_GAMMA,
/* name */ "Gamma",
/* width+range */ 140, 100, 320,
/* class+opts */ NODE_CLASS_OP_COLOR, NODE_OPTIONS,
/* input sock */ cmp_node_gamma_in,
/* output sock */ cmp_node_gamma_out,
/* storage */ "",
/* execfunc */ node_composit_exec_gamma,
/* butfunc */ NULL,
/* initfunc */ NULL,
/* freestoragefunc */ NULL,
/* copysotragefunc */ NULL,
/* id */ NULL
};
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