1df3b51988
* Rename struct KernelGlobals to struct KernelGlobalsCPU * Add KernelGlobals, IntegratorState and ConstIntegratorState typedefs that every device can define in its own way. * Remove INTEGRATOR_STATE_ARGS and INTEGRATOR_STATE_PASS macros and replace with these new typedefs. * Add explicit state argument to INTEGRATOR_STATE and similar macros In preparation for decoupling main and shadow paths. Differential Revision: https://developer.blender.org/D12888
57 lines
1.6 KiB
C
57 lines
1.6 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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#pragma once
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CCL_NAMESPACE_BEGIN
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/* Interpolated lookup table access */
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ccl_device float lookup_table_read(KernelGlobals kg, float x, int offset, int size)
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{
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x = saturate(x) * (size - 1);
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int index = min(float_to_int(x), size - 1);
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int nindex = min(index + 1, size - 1);
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float t = x - index;
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float data0 = kernel_tex_fetch(__lookup_table, index + offset);
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if (t == 0.0f)
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return data0;
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float data1 = kernel_tex_fetch(__lookup_table, nindex + offset);
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return (1.0f - t) * data0 + t * data1;
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}
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ccl_device float lookup_table_read_2D(
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KernelGlobals kg, float x, float y, int offset, int xsize, int ysize)
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{
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y = saturate(y) * (ysize - 1);
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int index = min(float_to_int(y), ysize - 1);
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int nindex = min(index + 1, ysize - 1);
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float t = y - index;
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float data0 = lookup_table_read(kg, x, offset + xsize * index, xsize);
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if (t == 0.0f)
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return data0;
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float data1 = lookup_table_read(kg, x, offset + xsize * nindex, xsize);
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return (1.0f - t) * data0 + t * data1;
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}
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CCL_NAMESPACE_END
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