CMP_huecorrect.c

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/*
 * $Id: CMP_huecorrect.c 36201 2011-04-17 22:11:23Z broken $
 *
 * ***** 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 *****
 */

#include "../CMP_util.h"

static bNodeSocketType cmp_node_huecorrect_in[]= {
        {       SOCK_VALUE, 1, "Fac",   1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f},
        {       SOCK_RGBA, 1, "Image",  0.0f, 0.0f, 0.0f, 1.0f, -1.0f, 1.0f},
        {       -1, 0, ""       }
};

static bNodeSocketType cmp_node_huecorrect_out[]= {
        {       SOCK_RGBA, 0, "Image",  0.0f, 0.0f, 1.0f, 1.0f, -1.0f, 1.0f},
        {       -1, 0, ""       }
};

static void do_huecorrect(bNode *node, float *out, float *in)
{
        float hsv[3], f;
        
        rgb_to_hsv(in[0], in[1], in[2], hsv, hsv+1, hsv+2);
        
        /* adjust hue, scaling returned default 0.5 up to 1 */
        f = curvemapping_evaluateF(node->storage, 0, hsv[0]);
        hsv[0] += f-0.5f;
        
        /* adjust saturation, scaling returned default 0.5 up to 1 */
        f = curvemapping_evaluateF(node->storage, 1, hsv[0]);
        hsv[1] *= (f * 2.f);
        
        /* adjust value, scaling returned default 0.5 up to 1 */
        f = curvemapping_evaluateF(node->storage, 2, hsv[0]);
        hsv[2] *= (f * 2.f);
        
        hsv[0] = hsv[0] - floor(hsv[0]); /* mod 1.0 */
        CLAMP(hsv[1], 0.f, 1.f);
        
        /* convert back to rgb */
        hsv_to_rgb(hsv[0], hsv[1], hsv[2], out, out+1, out+2);
        
        out[3]= in[3];
}

static void do_huecorrect_fac(bNode *node, float *out, float *in, float *fac)
{
        float hsv[3], rgb[3], f;
        const float mfac = 1.f-*fac;
        
        rgb_to_hsv(in[0], in[1], in[2], hsv, hsv+1, hsv+2);
        
        /* adjust hue, scaling returned default 0.5 up to 1 */
        f = curvemapping_evaluateF(node->storage, 0, hsv[0]);
        hsv[0] += f-0.5f;
        
        /* adjust saturation, scaling returned default 0.5 up to 1 */
        f = curvemapping_evaluateF(node->storage, 1, hsv[0]);
        hsv[1] *= (f * 2.f);
        
        /* adjust value, scaling returned default 0.5 up to 1 */
        f = curvemapping_evaluateF(node->storage, 2, hsv[0]);
        hsv[2] *= (f * 2.f);
        
        hsv[0] = hsv[0] - floor(hsv[0]);  /* mod 1.0 */
        CLAMP(hsv[1], 0.f, 1.f);
        
        /* convert back to rgb */
        hsv_to_rgb(hsv[0], hsv[1], hsv[2], rgb, rgb+1, rgb+2);
        
        out[0]= mfac*in[0] + *fac*rgb[0];
        out[1]= mfac*in[1] + *fac*rgb[1];
        out[2]= mfac*in[2] + *fac*rgb[2];
        out[3]= in[3];
}

static void node_composit_exec_huecorrect(void *UNUSED(data), bNode *node, bNodeStack **in, bNodeStack **out)
{
        CompBuf *cbuf= in[1]->data;
        CompBuf *stackbuf;
        
        /* stack order input:  fac, image, black level, white level */
        /* 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;
        }
        
        /* input no image? then only color operation */
        if(in[1]->data==NULL) {
                do_huecorrect_fac(node, out[0]->vec, in[1]->vec, in[0]->vec);
        }
        
        if (cbuf) {
                stackbuf= alloc_compbuf(cbuf->x, cbuf->y, CB_RGBA, 1); /* make output size of input image */
                
                if ((in[0]->data==NULL) && (in[0]->vec[0] >= 1.f))
                        composit1_pixel_processor(node, stackbuf, in[1]->data, in[1]->vec, do_huecorrect, CB_RGBA);
                else
                        composit2_pixel_processor(node, stackbuf, in[1]->data, in[1]->vec, in[0]->data, in[0]->vec, do_huecorrect_fac, CB_RGBA, CB_VAL);
                
                out[0]->data= stackbuf;
        }
        
}

static void node_composit_init_huecorrect(bNode* node)
{
        CurveMapping *cumapping = node->storage= curvemapping_add(1, 0.0f, 0.0f, 1.0f, 1.0f);
        int c;
        
        cumapping->preset = CURVE_PRESET_MID9;
        
        for (c=0; c<3; c++) {
                CurveMap *cuma = &cumapping->cm[c];
                curvemap_reset(cuma, &cumapping->clipr, cumapping->preset, CURVEMAP_SLOPE_POSITIVE);
        }
        
        /* default to showing Saturation */
        cumapping->cur = 1;
}

void register_node_type_cmp_huecorrect(ListBase *lb)
{
        static bNodeType ntype;

        node_type_base(&ntype, CMP_NODE_HUECORRECT, "Hue Correct", NODE_CLASS_OP_COLOR, NODE_OPTIONS,
                cmp_node_huecorrect_in, cmp_node_huecorrect_out);
        node_type_size(&ntype, 320, 140, 400);
        node_type_init(&ntype, node_composit_init_huecorrect);
        node_type_storage(&ntype, "CurveMapping", node_free_curves, node_copy_curves);
        node_type_exec(&ntype, node_composit_exec_huecorrect);

        nodeRegisterType(lb, &ntype);
}