CMP_mixrgb.c

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/*
 * $Id: CMP_mixrgb.c 35237 2011-02-27 20:13:22Z jesterking $
 *
 * ***** 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"

/* **************** MIX RGB ******************** */
static bNodeSocketType cmp_node_mix_rgb_in[]= {
        {       SOCK_VALUE, 1, "Fac",                   0.5f, 0.0f, 0.0f, 0.0f, 0.0f, 5.0f},
        {       SOCK_RGBA, 1, "Image",                  0.8f, 0.8f, 0.8f, 1.0f, 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_mix_rgb_out[]= {
        {       SOCK_RGBA, 0, "Image",                  0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f},
        {       -1, 0, ""       }
};

static void do_mix_rgb(bNode *node, float *out, float *in1, float *in2, float *fac)
{
        float col[3];
        
        VECCOPY(col, in1);
        if(node->custom2)
                ramp_blend(node->custom1, col, col+1, col+2, in2[3]*fac[0], in2);
        else
                ramp_blend(node->custom1, col, col+1, col+2, fac[0], in2);
        VECCOPY(out, col);
        out[3]= in1[3];
}

static void node_composit_exec_mix_rgb(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
{
        /* stack order in: fac, Image, Image */
        /* stack order out: Image */
        float *fac= in[0]->vec;
        
        if(out[0]->hasoutput==0) return;
        
        /* input no image? then only color operation */
        if(in[1]->data==NULL && in[2]->data==NULL) {
                do_mix_rgb(node, out[0]->vec, in[1]->vec, in[2]->vec, fac);
        }
        else {
                /* make output size of first available input image */
                CompBuf *cbuf= in[1]->data?in[1]->data:in[2]->data;
                CompBuf *stackbuf= alloc_compbuf(cbuf->x, cbuf->y, CB_RGBA, 1); /* allocs */
                
                composit3_pixel_processor(node, stackbuf, in[1]->data, in[1]->vec, in[2]->data, in[2]->vec, in[0]->data, fac, do_mix_rgb, CB_RGBA, CB_RGBA, CB_VAL);
                
                out[0]->data= stackbuf;
                
                generate_preview(data, node, out[0]->data);
        }
}

/* custom1 = mix type */
void register_node_type_cmp_mix_rgb(ListBase *lb)
{
        static bNodeType ntype;

        node_type_base(&ntype, CMP_NODE_MIX_RGB, "Mix", NODE_CLASS_OP_COLOR, NODE_PREVIEW|NODE_OPTIONS,
                cmp_node_mix_rgb_in, cmp_node_mix_rgb_out);
        node_type_size(&ntype, 110, 60, 120);
        node_type_label(&ntype, node_blend_label);
        node_type_exec(&ntype, node_composit_exec_mix_rgb);

        nodeRegisterType(lb, &ntype);
}