svm_convert.h

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/*
 * Copyright 2011, Blender Foundation.
 *
 * 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.
 */

CCL_NAMESPACE_BEGIN

/* Conversion Nodes */

__device void svm_node_convert(ShaderData *sd, float *stack, uint type, uint from, uint to)
{
    switch(type) {
        case NODE_CONVERT_FV: {
            float f = stack_load_float(stack, from);
            stack_store_float3(stack, to, make_float3(f, f, f));
            break;
        }
        case NODE_CONVERT_CF: {
            float3 f = stack_load_float3(stack, from);
            float g = linear_rgb_to_gray(f);
            stack_store_float(stack, to, g);
            break;
        }
        case NODE_CONVERT_VF: {
            float3 f = stack_load_float3(stack, from);
            float g = (f.x + f.y + f.z)*(1.0f/3.0f);
            stack_store_float(stack, to, g);
            break;
        }

    }
}

CCL_NAMESPACE_END