forked from bartvdbraak/blender
e12c08e8d1
Apply clang format as proposed in T53211. For details on usage and instructions for migrating branches without conflicts, see: https://wiki.blender.org/wiki/Tools/ClangFormat
91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
/*
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* Copyright 2011-2013 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __SVM_RAMP_UTIL_H__
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#define __SVM_RAMP_UTIL_H__
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CCL_NAMESPACE_BEGIN
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/* NOTE: svm_ramp.h, svm_ramp_util.h and node_ramp_util.h must stay consistent */
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ccl_device_inline float3
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rgb_ramp_lookup(const float3 *ramp, float f, bool interpolate, bool extrapolate, int table_size)
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{
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if ((f < 0.0f || f > 1.0f) && extrapolate) {
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float3 t0, dy;
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if (f < 0.0f) {
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t0 = ramp[0];
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dy = t0 - ramp[1], f = -f;
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}
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else {
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t0 = ramp[table_size - 1];
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dy = t0 - ramp[table_size - 2];
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f = f - 1.0f;
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}
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return t0 + dy * f * (table_size - 1);
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}
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f = clamp(f, 0.0f, 1.0f) * (table_size - 1);
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/* clamp int as well in case of NaN */
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int i = clamp(float_to_int(f), 0, table_size - 1);
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float t = f - (float)i;
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float3 result = ramp[i];
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if (interpolate && t > 0.0f) {
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result = (1.0f - t) * result + t * ramp[i + 1];
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}
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return result;
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}
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ccl_device float float_ramp_lookup(
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const float *ramp, float f, bool interpolate, bool extrapolate, int table_size)
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{
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if ((f < 0.0f || f > 1.0f) && extrapolate) {
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float t0, dy;
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if (f < 0.0f) {
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t0 = ramp[0];
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dy = t0 - ramp[1], f = -f;
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}
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else {
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t0 = ramp[table_size - 1];
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dy = t0 - ramp[table_size - 2];
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f = f - 1.0f;
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}
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return t0 + dy * f * (table_size - 1);
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}
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f = clamp(f, 0.0f, 1.0f) * (table_size - 1);
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/* clamp int as well in case of NaN */
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int i = clamp(float_to_int(f), 0, table_size - 1);
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float t = f - (float)i;
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float result = ramp[i];
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if (interpolate && t > 0.0f) {
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result = (1.0f - t) * result + t * ramp[i + 1];
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}
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return result;
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}
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CCL_NAMESPACE_END
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#endif /* __SVM_RAMP_UTIL_H__ */
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