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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): Matt Ebb.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/nodes/composite/nodes/node_composite_colorbalance.c
* \ingroup cmpnodes
*/
#include "node_composite_util.h"
/* ******************* Color Balance ********************************* */
static bNodeSocketTemplate cmp_node_colorbalance_in[]={
{SOCK_FLOAT, 1, N_("Fac"), 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, PROP_FACTOR},
{SOCK_RGBA, 1, N_("Image"), 1.0f, 1.0f, 1.0f, 1.0f},
{-1, 0, ""}
};
static bNodeSocketTemplate cmp_node_colorbalance_out[]={
{SOCK_RGBA, 0, N_("Image")},
{-1, 0, ""}
};
#ifdef WITH_COMPOSITOR_LEGACY
/* this function implements ASC-CDL according to the spec at http://www.asctech.org/
Slope
S = in * slope
Offset
O = S + offset
= (in * slope) + offset
Power
out = Clamp(O) ^ power
= Clamp((in * slope) + offset) ^ power
*/
DO_INLINE float colorbalance_cdl(float in, float offset, float power, float slope)
{
float x = in * slope + offset;
/* prevent NaN */
CLAMP(x, 0.0f, 1.0f);
return powf(x, power);
}
/* note: lift_lgg is just 2-lift, gamma_inv is 1.0/gamma */
DO_INLINE float colorbalance_lgg(float in, float lift_lgg, float gamma_inv, float gain)
{
/* 1:1 match with the sequencer with linear/srgb conversions, the conversion isn'tisn't pretty
* but best keep it this way, sice testing for durian shows a similar calculation
* without lin/srgb conversions gives bad results (over-saturated shadows) with colors
* slightly below 1.0. some correction can be done but it ends up looking bad for shadows or lighter tones - campbell */
float x= (((linearrgb_to_srgb(in) - 1.0f) * lift_lgg) + 1.0f) * gain;
/* prevent NaN */
if (x < 0.f) x = 0.f;
return powf(srgb_to_linearrgb(x), gamma_inv);
}
static void do_colorbalance_cdl(bNode *node, float* out, float *in)
{
NodeColorBalance *n= (NodeColorBalance *)node->storage;
out[0] = colorbalance_cdl(in[0], n->lift[0], n->gamma[0], n->gain[0]);
out[1] = colorbalance_cdl(in[1], n->lift[1], n->gamma[1], n->gain[1]);
out[2] = colorbalance_cdl(in[2], n->lift[2], n->gamma[2], n->gain[2]);
out[3] = in[3];
}
static void do_colorbalance_cdl_fac(bNode *node, float* out, float *in, float *fac)
{
NodeColorBalance *n= (NodeColorBalance *)node->storage;
const float mfac= 1.0f - *fac;
out[0] = mfac*in[0] + *fac * colorbalance_cdl(in[0], n->lift[0], n->gamma[0], n->gain[0]);
out[1] = mfac*in[1] + *fac * colorbalance_cdl(in[1], n->lift[1], n->gamma[1], n->gain[1]);
out[2] = mfac*in[2] + *fac * colorbalance_cdl(in[2], n->lift[2], n->gamma[2], n->gain[2]);
out[3] = in[3];
}
static void do_colorbalance_lgg(bNode *node, float* out, float *in)
{
NodeColorBalance *n= (NodeColorBalance *)node->storage;
out[0] = colorbalance_lgg(in[0], n->lift_lgg[0], n->gamma_inv[0], n->gain[0]);
out[1] = colorbalance_lgg(in[1], n->lift_lgg[1], n->gamma_inv[1], n->gain[1]);
out[2] = colorbalance_lgg(in[2], n->lift_lgg[2], n->gamma_inv[2], n->gain[2]);
out[3] = in[3];
}
static void do_colorbalance_lgg_fac(bNode *node, float* out, float *in, float *fac)
{
NodeColorBalance *n= (NodeColorBalance *)node->storage;
const float mfac= 1.0f - *fac;
out[0] = mfac*in[0] + *fac * colorbalance_lgg(in[0], n->lift_lgg[0], n->gamma_inv[0], n->gain[0]);
out[1] = mfac*in[1] + *fac * colorbalance_lgg(in[1], n->lift_lgg[1], n->gamma_inv[1], n->gain[1]);
out[2] = mfac*in[2] + *fac * colorbalance_lgg(in[2], n->lift_lgg[2], n->gamma_inv[2], n->gain[2]);
out[3] = in[3];
}
static void node_composit_exec_colorbalance(void *UNUSED(data), bNode *node, bNodeStack **in, bNodeStack **out)
{
CompBuf *cbuf= in[1]->data;
CompBuf *stackbuf;
/* stack order input: fac, image */
/* stack order output: image */
if (out[0]->hasoutput==0) return;
if (in[0]->vec[0] == 0.f && in[0]->data == NULL) {
out[0]->data = pass_on_compbuf(cbuf);
return;
}
{
NodeColorBalance *n= (NodeColorBalance *)node->storage;
int c;
for (c = 0; c < 3; c++) {
n->lift_lgg[c] = 2.0f - n->lift[c];
n->gamma_inv[c] = (n->gamma[c] != 0.0f) ? 1.0f/n->gamma[c] : 1000000.0f;
}
}
if (cbuf) {
stackbuf= alloc_compbuf(cbuf->x, cbuf->y, CB_RGBA, 1); /* create output based on image input */
if (node->custom1 == 0) {
/* lift gamma gain */
if ((in[0]->data==NULL) && (in[0]->vec[0] >= 1.f)) {
composit1_pixel_processor(node, stackbuf, in[1]->data, in[1]->vec, do_colorbalance_lgg, CB_RGBA);
}
else {
composit2_pixel_processor(node, stackbuf, in[1]->data, in[1]->vec, in[0]->data, in[0]->vec, do_colorbalance_lgg_fac, CB_RGBA, CB_VAL);
}
}
else {
/* offset/power/slope : ASC-CDL */
if ((in[0]->data==NULL) && (in[0]->vec[0] >= 1.f)) {
composit1_pixel_processor(node, stackbuf, in[1]->data, in[1]->vec, do_colorbalance_cdl, CB_RGBA);
}
else {
composit2_pixel_processor(node, stackbuf, in[1]->data, in[1]->vec, in[0]->data, in[0]->vec, do_colorbalance_cdl_fac, CB_RGBA, CB_VAL);
}
}
out[0]->data=stackbuf;
}
}
#endif /* WITH_COMPOSITOR_LEGACY */
static void node_composit_init_colorbalance(bNodeTree *UNUSED(ntree), bNode *node, bNodeTemplate *UNUSED(ntemp))
{
NodeColorBalance *n= node->storage= MEM_callocN(sizeof(NodeColorBalance), "node colorbalance");
n->lift[0] = n->lift[1] = n->lift[2] = 1.0f;
n->gamma[0] = n->gamma[1] = n->gamma[2] = 1.0f;
n->gain[0] = n->gain[1] = n->gain[2] = 1.0f;
}
void register_node_type_cmp_colorbalance(bNodeTreeType *ttype)
{
static bNodeType ntype;
node_type_base(ttype, &ntype, CMP_NODE_COLORBALANCE, "Color Balance", NODE_CLASS_OP_COLOR, NODE_OPTIONS);
node_type_socket_templates(&ntype, cmp_node_colorbalance_in, cmp_node_colorbalance_out);
node_type_size(&ntype, 400, 200, 400);
node_type_init(&ntype, node_composit_init_colorbalance);
node_type_storage(&ntype, "NodeColorBalance", node_free_standard_storage, node_copy_standard_storage);
#ifdef WITH_COMPOSITOR_LEGACY
node_type_exec(&ntype, node_composit_exec_colorbalance);
#endif
nodeRegisterType(ttype, &ntype);
}
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