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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
__device float invert(float color, float factor)
{
return factor*(1.0f - color) + (1.0f - factor) * color;
}
__device void svm_node_invert(ShaderData *sd, float *stack, uint in_fac, uint in_color, uint out_color)
{
float factor = stack_load_float(stack, in_fac);
float3 color = stack_load_float3(stack, in_color);
color.x = invert(color.x, factor);
color.y = invert(color.y, factor);
color.z = invert(color.z, factor);
if (stack_valid(out_color))
stack_store_float3(stack, out_color, color);
}
CCL_NAMESPACE_END
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