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/*
* Copyright 2011-2013 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
CCL_NAMESPACE_BEGIN
ccl_device void svm_node_gamma(ShaderData *sd, float *stack, uint in_gamma, uint in_color, uint out_color)
{
float3 color = stack_load_float3(stack, in_color);
float gamma = stack_load_float(stack, in_gamma);
if (color.x > 0.0f)
color.x = powf(color.x, gamma);
if (color.y > 0.0f)
color.y = powf(color.y, gamma);
if (color.z > 0.0f)
color.z = powf(color.z, gamma);
if (stack_valid(out_color))
stack_store_float3(stack, out_color, color);
}
CCL_NAMESPACE_END
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