intern/cycles/kernel/svm/invert.h


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/* SPDX-License-Identifier: Apache-2.0
 * Copyright 2011-2022 Blender Foundation */

#pragma once

CCL_NAMESPACE_BEGIN

ccl_device float invert(float color, float factor)
{
  return factor * (1.0f - color) + (1.0f - factor) * color;
}

ccl_device_noinline void svm_node_invert(ccl_private ShaderData *sd,
                                         ccl_private 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