node_composite_hueSatVal.c

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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): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "node_composite_util.h"


/* **************** Hue Saturation ******************** */
static bNodeSocketTemplate cmp_node_hue_sat_in[]= {
    {   SOCK_FLOAT, 1, "Fac",           1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, PROP_FACTOR},
    {   SOCK_RGBA, 1, "Image",          1.0f, 1.0f, 1.0f, 1.0f},
    {   -1, 0, ""   }
};
static bNodeSocketTemplate cmp_node_hue_sat_out[]= {
    {   SOCK_RGBA, 0, "Image"},
    {   -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!=1.0f || nhs->val!=1.0f)) {
        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]>1.0f) hsv[0]-=1.0f; else if(hsv[0]<0.0f) hsv[0]+= 1.0f;
        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 {
        copy_v4_v4(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(bNodeTree *UNUSED(ntree), bNode* node, bNodeTemplate *UNUSED(ntemp))
{
    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(bNodeTreeType *ttype)
{
    static bNodeType ntype;

    node_type_base(ttype, &ntype, CMP_NODE_HUE_SAT, "Hue Saturation Value", NODE_CLASS_OP_COLOR, NODE_OPTIONS);
    node_type_socket_templates(&ntype, 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(ttype, &ntype);
}