CMP_hueSatVal.c

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/*
 * $Id: CMP_hueSatVal.c 36276 2011-04-21 15:53:30Z campbellbarton $
 *
 * ***** 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"


/* **************** Hue Saturation ******************** */
static bNodeSocketType cmp_node_hue_sat_in[]= {
        {       SOCK_VALUE, 1, "Fac",                   1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
        {       SOCK_RGBA, 1, "Image",                  0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
        {       -1, 0, ""       }
};
static bNodeSocketType cmp_node_hue_sat_out[]= {
        {       SOCK_RGBA, 0, "Image",                  0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f},
        {       -1, 0, ""       }
};

static void do_hue_sat_fac(bNode *node, float *out, float *in, float *fac)
{
        NodeHueSat *nhs= node->storage;
        
        if(*fac!=0.0f && (nhs->hue!=0.5f || nhs->sat!=1.0 || nhs->val!=1.0)) {
                float col[3], hsv[3], mfac= 1.0f - *fac;
                
                rgb_to_hsv(in[0], in[1], in[2], hsv, hsv+1, hsv+2);
                hsv[0]+= (nhs->hue - 0.5f);
                if(hsv[0]>1.0) hsv[0]-=1.0; else if(hsv[0]<0.0) hsv[0]+= 1.0;
                hsv[1]*= nhs->sat;
                hsv[2]*= nhs->val;
                hsv_to_rgb(hsv[0], hsv[1], hsv[2], col, col+1, col+2);
                
                out[0]= mfac*in[0] + *fac*col[0];
                out[1]= mfac*in[1] + *fac*col[1];
                out[2]= mfac*in[2] + *fac*col[2];
                out[3]= in[3];
        }
        else {
                QUATCOPY(out, in);
        }
}

static void node_composit_exec_hue_sat(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[1]->data==NULL) {
                do_hue_sat_fac(node, out[0]->vec, in[1]->vec, in[0]->vec);
        }
        else {
                /* make output size of input image */
                CompBuf *cbuf= dupalloc_compbuf(in[1]->data);
                CompBuf *stackbuf=typecheck_compbuf(cbuf,CB_RGBA);
                
                composit2_pixel_processor(node, stackbuf, stackbuf, in[1]->vec, in[0]->data, in[0]->vec, do_hue_sat_fac, CB_RGBA, CB_VAL);

                out[0]->data= stackbuf;

                /* get rid of intermediary cbuf if it's extra */                
                if(stackbuf!=cbuf)
                        free_compbuf(cbuf);
        }
}

static void node_composit_init_hue_sat(bNode* node)
{
        NodeHueSat *nhs= MEM_callocN(sizeof(NodeHueSat), "node hue sat");
        node->storage= nhs;
        nhs->hue= 0.5f;
        nhs->sat= 1.0f;
        nhs->val= 1.0f;
}

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

        node_type_base(&ntype, CMP_NODE_HUE_SAT, "Hue Saturation Value", NODE_CLASS_OP_COLOR, NODE_OPTIONS,
                cmp_node_hue_sat_in, cmp_node_hue_sat_out);
        node_type_size(&ntype, 150, 80, 250);
        node_type_init(&ntype, node_composit_init_hue_sat);
        node_type_storage(&ntype, "NodeHueSat", node_free_standard_storage, node_copy_standard_storage);
        node_type_exec(&ntype, node_composit_exec_hue_sat);

        nodeRegisterType(lb, &ntype);
}