Blender V2.61 - r43446

svm_convert.h

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00001 /*
00002  * Copyright 2011, Blender Foundation.
00003  *
00004  * This program is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU General Public License
00006  * as published by the Free Software Foundation; either version 2
00007  * of the License, or (at your option) any later version.
00008  *
00009  * This program is distributed in the hope that it will be useful,
00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  * GNU General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU General Public License
00015  * along with this program; if not, write to the Free Software Foundation,
00016  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
00017  */
00018 
00019 CCL_NAMESPACE_BEGIN
00020 
00021 /* Conversion Nodes */
00022 
00023 __device void svm_node_convert(ShaderData *sd, float *stack, uint type, uint from, uint to)
00024 {
00025     switch(type) {
00026         case NODE_CONVERT_FV: {
00027             float f = stack_load_float(stack, from);
00028             stack_store_float3(stack, to, make_float3(f, f, f));
00029             break;
00030         }
00031         case NODE_CONVERT_CF: {
00032             float3 f = stack_load_float3(stack, from);
00033             float g = linear_rgb_to_gray(f);
00034             stack_store_float(stack, to, g);
00035             break;
00036         }
00037         case NODE_CONVERT_VF: {
00038             float3 f = stack_load_float3(stack, from);
00039             float g = (f.x + f.y + f.z)*(1.0f/3.0f);
00040             stack_store_float(stack, to, g);
00041             break;
00042         }
00043 
00044     }
00045 }
00046 
00047 CCL_NAMESPACE_END
00048