38 lines
1.2 KiB
C
38 lines
1.2 KiB
C
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/*
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* Copyright 2011, Blender Foundation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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CCL_NAMESPACE_BEGIN
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__device void svm_node_gamma(ShaderData *sd, float *stack, uint in_gamma, uint in_color, uint out_color)
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{
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float3 color = stack_load_float3(stack, in_color);
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float gamma = stack_load_float(stack, in_gamma);
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if (color.x > 0.0)
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color.x = powf(color.x, gamma);
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if (color.y > 0.0)
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color.y = powf(color.y, gamma);
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if (color.z > 0.0)
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color.z = powf(color.z, gamma);
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if (stack_valid(out_color))
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stack_store_float3(stack, out_color, color);
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}
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CCL_NAMESPACE_END
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