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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
/* Clamp Node */
ccl_device void svm_node_clamp(KernelGlobals *kg,
ShaderData *sd,
float *stack,
uint value_stack_offset,
uint parameters_stack_offsets,
uint result_stack_offset,
int *offset)
{
uint min_stack_offset, max_stack_offset, type;
svm_unpack_node_uchar3(parameters_stack_offsets, &min_stack_offset, &max_stack_offset, &type);
uint4 defaults = read_node(kg, offset);
float value = stack_load_float(stack, value_stack_offset);
float min = stack_load_float_default(stack, min_stack_offset, defaults.x);
float max = stack_load_float_default(stack, max_stack_offset, defaults.y);
if (type == NODE_CLAMP_RANGE && (min > max)) {
stack_store_float(stack, result_stack_offset, clamp(value, max, min));
}
else {
stack_store_float(stack, result_stack_offset, clamp(value, min, max));
}
}
CCL_NAMESPACE_END
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