node_shader_mixRgb.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) 2005 Blender Foundation.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "node_shader_util.h"

/* **************** MIX RGB ******************** */
static bNodeSocketTemplate sh_node_mix_rgb_in[]= {
    {   SOCK_FLOAT, 1, "Fac",           0.5f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, PROP_FACTOR},
    {   SOCK_RGBA, 1, "Color1",         0.5f, 0.5f, 0.5f, 1.0f},
    {   SOCK_RGBA, 1, "Color2",         0.5f, 0.5f, 0.5f, 1.0f},
    {   -1, 0, ""   }
};
static bNodeSocketTemplate sh_node_mix_rgb_out[]= {
    {   SOCK_RGBA, 0, "Color"},
    {   -1, 0, ""   }
};

static void node_shader_exec_mix_rgb(void *UNUSED(data), bNode *node, bNodeStack **in, bNodeStack **out)
{
    /* stack order in: fac, col1, col2 */
    /* stack order out: col */
    float col[3];
    float fac;
    float vec[3];

    nodestack_get_vec(&fac, SOCK_FLOAT, in[0]);
    CLAMP(fac, 0.0f, 1.0f);
    
    nodestack_get_vec(col, SOCK_VECTOR, in[1]);
    nodestack_get_vec(vec, SOCK_VECTOR, in[2]);

    ramp_blend(node->custom1, col, fac, vec);
    copy_v3_v3(out[0]->vec, col);
}

static int gpu_shader_mix_rgb(GPUMaterial *mat, bNode *node, GPUNodeStack *in, GPUNodeStack *out)
{
    static const char *names[] = {"mix_blend", "mix_add", "mix_mult", "mix_sub",
        "mix_screen", "mix_div", "mix_diff", "mix_dark", "mix_light",
        "mix_overlay", "mix_dodge", "mix_burn", "mix_hue", "mix_sat",
        "mix_val", "mix_color", "mix_soft", "mix_linear"};

    return GPU_stack_link(mat, names[node->custom1], in, out);
}


void register_node_type_sh_mix_rgb(bNodeTreeType *ttype)
{
    static bNodeType ntype;

    node_type_base(ttype, &ntype, SH_NODE_MIX_RGB, "Mix", NODE_CLASS_OP_COLOR, NODE_OPTIONS);
    node_type_compatibility(&ntype, NODE_OLD_SHADING|NODE_NEW_SHADING);
    node_type_socket_templates(&ntype, sh_node_mix_rgb_in, sh_node_mix_rgb_out);
    node_type_size(&ntype, 100, 60, 150);
    node_type_label(&ntype, node_blend_label);
    node_type_exec(&ntype, node_shader_exec_mix_rgb);
    node_type_gpu(&ntype, gpu_shader_mix_rgb);

    nodeRegisterType(ttype, &ntype);
}