Brecht Van Lommel
fd77a28031
These transparent shadows can be expansive to evaluate. Especially on the GPU they can lead to poor occupancy when only some pixels require many kernel launches to trace and evaluate many layers of transparency. Baked transparency allows tracing a single ray in many cases by accumulating the throughput directly in the intersection program without recording hits or evaluating shaders. Transparency is baked at curve vertices and interpolated, for most shaders this will look practically the same as actual shader evaluation. Fixes T91428, performance regression with spring demo file due to transparent hair, and makes it render significantly faster than Blender 2.93. Differential Revision: https://developer.blender.org/D12880
263 lines
9.1 KiB
C++
263 lines
9.1 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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/* Templated common implementation part of all CPU kernels.
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*
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* The idea is that particular .cpp files sets needed optimization flags and
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* simply includes this file without worry of copying actual implementation over.
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*/
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#pragma once
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// clang-format off
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#include "kernel/device/cpu/compat.h"
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#ifndef KERNEL_STUB
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# include "kernel/device/cpu/globals.h"
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# include "kernel/device/cpu/image.h"
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# include "kernel/integrator/integrator_state.h"
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# include "kernel/integrator/integrator_state_flow.h"
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# include "kernel/integrator/integrator_state_util.h"
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# include "kernel/integrator/integrator_init_from_camera.h"
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# include "kernel/integrator/integrator_init_from_bake.h"
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# include "kernel/integrator/integrator_intersect_closest.h"
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# include "kernel/integrator/integrator_intersect_shadow.h"
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# include "kernel/integrator/integrator_intersect_subsurface.h"
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# include "kernel/integrator/integrator_intersect_volume_stack.h"
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# include "kernel/integrator/integrator_shade_background.h"
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# include "kernel/integrator/integrator_shade_light.h"
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# include "kernel/integrator/integrator_shade_shadow.h"
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# include "kernel/integrator/integrator_shade_surface.h"
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# include "kernel/integrator/integrator_shade_volume.h"
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# include "kernel/integrator/integrator_megakernel.h"
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# include "kernel/kernel_film.h"
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# include "kernel/kernel_adaptive_sampling.h"
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# include "kernel/kernel_bake.h"
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# include "kernel/kernel_id_passes.h"
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#else
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# define STUB_ASSERT(arch, name) \
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assert(!(#name " kernel stub for architecture " #arch " was called!"))
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#endif /* KERNEL_STUB */
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// clang-format on
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CCL_NAMESPACE_BEGIN
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/* --------------------------------------------------------------------
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* Integrator.
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*/
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#ifdef KERNEL_STUB
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# define KERNEL_INVOKE(name, ...) (STUB_ASSERT(KERNEL_ARCH, name), 0)
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#else
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# define KERNEL_INVOKE(name, ...) integrator_##name(__VA_ARGS__)
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#endif
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/* TODO: Either use something like get_work_pixel(), or simplify tile which is passed here, so
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* that it does not contain unused fields. */
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#define DEFINE_INTEGRATOR_INIT_KERNEL(name) \
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bool KERNEL_FUNCTION_FULL_NAME(integrator_##name)(const KernelGlobalsCPU *kg, \
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IntegratorStateCPU *state, \
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KernelWorkTile *tile, \
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ccl_global float *render_buffer) \
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{ \
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return KERNEL_INVOKE( \
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name, kg, state, tile, render_buffer, tile->x, tile->y, tile->start_sample); \
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}
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#define DEFINE_INTEGRATOR_KERNEL(name) \
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void KERNEL_FUNCTION_FULL_NAME(integrator_##name)(const KernelGlobalsCPU *kg, \
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IntegratorStateCPU *state) \
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{ \
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KERNEL_INVOKE(name, kg, state); \
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}
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#define DEFINE_INTEGRATOR_SHADE_KERNEL(name) \
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void KERNEL_FUNCTION_FULL_NAME(integrator_##name)( \
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const KernelGlobalsCPU *kg, IntegratorStateCPU *state, ccl_global float *render_buffer) \
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{ \
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KERNEL_INVOKE(name, kg, state, render_buffer); \
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}
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#define DEFINE_INTEGRATOR_SHADOW_KERNEL(name) \
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void KERNEL_FUNCTION_FULL_NAME(integrator_##name)(const KernelGlobalsCPU *kg, \
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IntegratorStateCPU *state) \
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{ \
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KERNEL_INVOKE(name, kg, &state->shadow); \
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}
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#define DEFINE_INTEGRATOR_SHADOW_SHADE_KERNEL(name) \
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void KERNEL_FUNCTION_FULL_NAME(integrator_##name)( \
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const KernelGlobalsCPU *kg, IntegratorStateCPU *state, ccl_global float *render_buffer) \
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{ \
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KERNEL_INVOKE(name, kg, &state->shadow, render_buffer); \
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}
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DEFINE_INTEGRATOR_INIT_KERNEL(init_from_camera)
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DEFINE_INTEGRATOR_INIT_KERNEL(init_from_bake)
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DEFINE_INTEGRATOR_KERNEL(intersect_closest)
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DEFINE_INTEGRATOR_KERNEL(intersect_subsurface)
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DEFINE_INTEGRATOR_KERNEL(intersect_volume_stack)
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DEFINE_INTEGRATOR_SHADE_KERNEL(shade_background)
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DEFINE_INTEGRATOR_SHADE_KERNEL(shade_light)
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DEFINE_INTEGRATOR_SHADE_KERNEL(shade_surface)
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DEFINE_INTEGRATOR_SHADE_KERNEL(shade_volume)
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DEFINE_INTEGRATOR_SHADE_KERNEL(megakernel)
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DEFINE_INTEGRATOR_SHADOW_KERNEL(intersect_shadow)
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DEFINE_INTEGRATOR_SHADOW_SHADE_KERNEL(shade_shadow)
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/* --------------------------------------------------------------------
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* Shader evaluation.
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*/
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void KERNEL_FUNCTION_FULL_NAME(shader_eval_displace)(const KernelGlobalsCPU *kg,
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const KernelShaderEvalInput *input,
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float *output,
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const int offset)
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{
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#ifdef KERNEL_STUB
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STUB_ASSERT(KERNEL_ARCH, shader_eval_displace);
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#else
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kernel_displace_evaluate(kg, input, output, offset);
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#endif
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}
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void KERNEL_FUNCTION_FULL_NAME(shader_eval_background)(const KernelGlobalsCPU *kg,
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const KernelShaderEvalInput *input,
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float *output,
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const int offset)
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{
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#ifdef KERNEL_STUB
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STUB_ASSERT(KERNEL_ARCH, shader_eval_background);
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#else
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kernel_background_evaluate(kg, input, output, offset);
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#endif
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}
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void KERNEL_FUNCTION_FULL_NAME(shader_eval_curve_shadow_transparency)(
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const KernelGlobalsCPU *kg,
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const KernelShaderEvalInput *input,
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float *output,
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const int offset)
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{
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#ifdef KERNEL_STUB
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STUB_ASSERT(KERNEL_ARCH, shader_eval_curve_shadow_transparency);
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#else
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kernel_curve_shadow_transparency_evaluate(kg, input, output, offset);
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#endif
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}
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/* --------------------------------------------------------------------
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* Adaptive sampling.
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*/
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bool KERNEL_FUNCTION_FULL_NAME(adaptive_sampling_convergence_check)(
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const KernelGlobalsCPU *kg,
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ccl_global float *render_buffer,
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int x,
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int y,
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float threshold,
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bool reset,
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int offset,
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int stride)
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{
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#ifdef KERNEL_STUB
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STUB_ASSERT(KERNEL_ARCH, adaptive_sampling_convergence_check);
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return false;
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#else
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return kernel_adaptive_sampling_convergence_check(
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kg, render_buffer, x, y, threshold, reset, offset, stride);
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#endif
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}
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void KERNEL_FUNCTION_FULL_NAME(adaptive_sampling_filter_x)(const KernelGlobalsCPU *kg,
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ccl_global float *render_buffer,
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int y,
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int start_x,
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int width,
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int offset,
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int stride)
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{
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#ifdef KERNEL_STUB
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STUB_ASSERT(KERNEL_ARCH, adaptive_sampling_filter_x);
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#else
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kernel_adaptive_sampling_filter_x(kg, render_buffer, y, start_x, width, offset, stride);
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#endif
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}
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void KERNEL_FUNCTION_FULL_NAME(adaptive_sampling_filter_y)(const KernelGlobalsCPU *kg,
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ccl_global float *render_buffer,
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int x,
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int start_y,
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int height,
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int offset,
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int stride)
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{
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#ifdef KERNEL_STUB
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STUB_ASSERT(KERNEL_ARCH, adaptive_sampling_filter_y);
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#else
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kernel_adaptive_sampling_filter_y(kg, render_buffer, x, start_y, height, offset, stride);
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#endif
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}
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/* --------------------------------------------------------------------
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* Cryptomatte.
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*/
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void KERNEL_FUNCTION_FULL_NAME(cryptomatte_postprocess)(const KernelGlobalsCPU *kg,
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ccl_global float *render_buffer,
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int pixel_index)
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{
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#ifdef KERNEL_STUB
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STUB_ASSERT(KERNEL_ARCH, cryptomatte_postprocess);
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#else
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kernel_cryptomatte_post(kg, render_buffer, pixel_index);
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#endif
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}
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/* --------------------------------------------------------------------
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* Bake.
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*/
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/* TODO(sergey): Needs to be re-implemented. Or not? Brecht did it already :) */
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void KERNEL_FUNCTION_FULL_NAME(bake)(
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const KernelGlobalsCPU *kg, float *buffer, int sample, int x, int y, int offset, int stride)
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{
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#if 0
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# ifdef KERNEL_STUB
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STUB_ASSERT(KERNEL_ARCH, bake);
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# else
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# ifdef __BAKING__
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kernel_bake_evaluate(kg, buffer, sample, x, y, offset, stride);
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# endif
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# endif /* KERNEL_STUB */
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#endif
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}
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#undef KERNEL_INVOKE
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#undef DEFINE_INTEGRATOR_KERNEL
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#undef DEFINE_INTEGRATOR_SHADE_KERNEL
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#undef DEFINE_INTEGRATOR_INIT_KERNEL
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#undef KERNEL_STUB
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#undef STUB_ASSERT
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#undef KERNEL_ARCH
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CCL_NAMESPACE_END
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