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Diffstat (limited to 'intern/cycles/kernel/svm/clamp.h')
-rw-r--r-- | intern/cycles/kernel/svm/clamp.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/intern/cycles/kernel/svm/clamp.h b/intern/cycles/kernel/svm/clamp.h new file mode 100644 index 00000000000..c07c0206d29 --- /dev/null +++ b/intern/cycles/kernel/svm/clamp.h @@ -0,0 +1,49 @@ +/* + * 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. + */ + +#pragma once + +CCL_NAMESPACE_BEGIN + +/* Clamp Node */ + +ccl_device_noinline int svm_node_clamp(KernelGlobals kg, + ccl_private ShaderData *sd, + ccl_private 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)); + } + return offset; +} + +CCL_NAMESPACE_END |