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/*
* Copyright 2011-2021 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
#include "kernel/integrator/integrator_state.h"
#include "kernel/kernel_differential.h"
CCL_NAMESPACE_BEGIN
/* Ray */
ccl_device_forceinline void integrator_state_write_ray(INTEGRATOR_STATE_ARGS,
const Ray *ccl_restrict ray)
{
INTEGRATOR_STATE_WRITE(ray, P) = ray->P;
INTEGRATOR_STATE_WRITE(ray, D) = ray->D;
INTEGRATOR_STATE_WRITE(ray, t) = ray->t;
INTEGRATOR_STATE_WRITE(ray, time) = ray->time;
INTEGRATOR_STATE_WRITE(ray, dP) = ray->dP;
INTEGRATOR_STATE_WRITE(ray, dD) = ray->dD;
}
ccl_device_forceinline void integrator_state_read_ray(INTEGRATOR_STATE_CONST_ARGS,
Ray *ccl_restrict ray)
{
ray->P = INTEGRATOR_STATE(ray, P);
ray->D = INTEGRATOR_STATE(ray, D);
ray->t = INTEGRATOR_STATE(ray, t);
ray->time = INTEGRATOR_STATE(ray, time);
ray->dP = INTEGRATOR_STATE(ray, dP);
ray->dD = INTEGRATOR_STATE(ray, dD);
}
/* Shadow Ray */
ccl_device_forceinline void integrator_state_write_shadow_ray(INTEGRATOR_STATE_ARGS,
const Ray *ccl_restrict ray)
{
INTEGRATOR_STATE_WRITE(shadow_ray, P) = ray->P;
INTEGRATOR_STATE_WRITE(shadow_ray, D) = ray->D;
INTEGRATOR_STATE_WRITE(shadow_ray, t) = ray->t;
INTEGRATOR_STATE_WRITE(shadow_ray, time) = ray->time;
INTEGRATOR_STATE_WRITE(shadow_ray, dP) = ray->dP;
}
ccl_device_forceinline void integrator_state_read_shadow_ray(INTEGRATOR_STATE_CONST_ARGS,
Ray *ccl_restrict ray)
{
ray->P = INTEGRATOR_STATE(shadow_ray, P);
ray->D = INTEGRATOR_STATE(shadow_ray, D);
ray->t = INTEGRATOR_STATE(shadow_ray, t);
ray->time = INTEGRATOR_STATE(shadow_ray, time);
ray->dP = INTEGRATOR_STATE(shadow_ray, dP);
ray->dD = differential_zero_compact();
}
/* Intersection */
ccl_device_forceinline void integrator_state_write_isect(INTEGRATOR_STATE_ARGS,
const Intersection *ccl_restrict isect)
{
INTEGRATOR_STATE_WRITE(isect, t) = isect->t;
INTEGRATOR_STATE_WRITE(isect, u) = isect->u;
INTEGRATOR_STATE_WRITE(isect, v) = isect->v;
INTEGRATOR_STATE_WRITE(isect, object) = isect->object;
INTEGRATOR_STATE_WRITE(isect, prim) = isect->prim;
INTEGRATOR_STATE_WRITE(isect, type) = isect->type;
#ifdef __EMBREE__
INTEGRATOR_STATE_WRITE(isect, Ng) = isect->Ng;
#endif
}
ccl_device_forceinline void integrator_state_read_isect(INTEGRATOR_STATE_CONST_ARGS,
Intersection *ccl_restrict isect)
{
isect->prim = INTEGRATOR_STATE(isect, prim);
isect->object = INTEGRATOR_STATE(isect, object);
isect->type = INTEGRATOR_STATE(isect, type);
isect->u = INTEGRATOR_STATE(isect, u);
isect->v = INTEGRATOR_STATE(isect, v);
isect->t = INTEGRATOR_STATE(isect, t);
#ifdef __EMBREE__
isect->Ng = INTEGRATOR_STATE(isect, Ng);
#endif
}
ccl_device_forceinline VolumeStack integrator_state_read_volume_stack(INTEGRATOR_STATE_CONST_ARGS,
int i)
{
VolumeStack entry = {INTEGRATOR_STATE_ARRAY(volume_stack, i, object),
INTEGRATOR_STATE_ARRAY(volume_stack, i, shader)};
return entry;
}
ccl_device_forceinline void integrator_state_write_volume_stack(INTEGRATOR_STATE_ARGS,
int i,
VolumeStack entry)
{
INTEGRATOR_STATE_ARRAY_WRITE(volume_stack, i, object) = entry.object;
INTEGRATOR_STATE_ARRAY_WRITE(volume_stack, i, shader) = entry.shader;
}
ccl_device_forceinline bool integrator_state_volume_stack_is_empty(INTEGRATOR_STATE_CONST_ARGS)
{
return (kernel_data.kernel_features & KERNEL_FEATURE_VOLUME) ?
INTEGRATOR_STATE_ARRAY(volume_stack, 0, shader) == SHADER_NONE :
true;
}
/* Shadow Intersection */
ccl_device_forceinline void integrator_state_write_shadow_isect(
INTEGRATOR_STATE_ARGS, const Intersection *ccl_restrict isect, const int index)
{
INTEGRATOR_STATE_ARRAY_WRITE(shadow_isect, index, t) = isect->t;
INTEGRATOR_STATE_ARRAY_WRITE(shadow_isect, index, u) = isect->u;
INTEGRATOR_STATE_ARRAY_WRITE(shadow_isect, index, v) = isect->v;
INTEGRATOR_STATE_ARRAY_WRITE(shadow_isect, index, object) = isect->object;
INTEGRATOR_STATE_ARRAY_WRITE(shadow_isect, index, prim) = isect->prim;
INTEGRATOR_STATE_ARRAY_WRITE(shadow_isect, index, type) = isect->type;
#ifdef __EMBREE__
INTEGRATOR_STATE_ARRAY_WRITE(shadow_isect, index, Ng) = isect->Ng;
#endif
}
ccl_device_forceinline void integrator_state_read_shadow_isect(INTEGRATOR_STATE_CONST_ARGS,
Intersection *ccl_restrict isect,
const int index)
{
isect->prim = INTEGRATOR_STATE_ARRAY(shadow_isect, index, prim);
isect->object = INTEGRATOR_STATE_ARRAY(shadow_isect, index, object);
isect->type = INTEGRATOR_STATE_ARRAY(shadow_isect, index, type);
isect->u = INTEGRATOR_STATE_ARRAY(shadow_isect, index, u);
isect->v = INTEGRATOR_STATE_ARRAY(shadow_isect, index, v);
isect->t = INTEGRATOR_STATE_ARRAY(shadow_isect, index, t);
#ifdef __EMBREE__
isect->Ng = INTEGRATOR_STATE_ARRAY(shadow_isect, index, Ng);
#endif
}
ccl_device_forceinline void integrator_state_copy_volume_stack_to_shadow(INTEGRATOR_STATE_ARGS)
{
if (kernel_data.kernel_features & KERNEL_FEATURE_VOLUME) {
for (int i = 0; i < INTEGRATOR_VOLUME_STACK_SIZE; i++) {
INTEGRATOR_STATE_ARRAY_WRITE(shadow_volume_stack, i, object) = INTEGRATOR_STATE_ARRAY(
volume_stack, i, object);
INTEGRATOR_STATE_ARRAY_WRITE(shadow_volume_stack, i, shader) = INTEGRATOR_STATE_ARRAY(
volume_stack, i, shader);
}
}
}
ccl_device_forceinline VolumeStack
integrator_state_read_shadow_volume_stack(INTEGRATOR_STATE_CONST_ARGS, int i)
{
VolumeStack entry = {INTEGRATOR_STATE_ARRAY(shadow_volume_stack, i, object),
INTEGRATOR_STATE_ARRAY(shadow_volume_stack, i, shader)};
return entry;
}
ccl_device_forceinline bool integrator_state_shadow_volume_stack_is_empty(
INTEGRATOR_STATE_CONST_ARGS)
{
return (kernel_data.kernel_features & KERNEL_FEATURE_VOLUME) ?
INTEGRATOR_STATE_ARRAY(shadow_volume_stack, 0, shader) == SHADER_NONE :
true;
}
ccl_device_forceinline void integrator_state_write_shadow_volume_stack(INTEGRATOR_STATE_ARGS,
int i,
VolumeStack entry)
{
INTEGRATOR_STATE_ARRAY_WRITE(shadow_volume_stack, i, object) = entry.object;
INTEGRATOR_STATE_ARRAY_WRITE(shadow_volume_stack, i, shader) = entry.shader;
}
#if defined(__KERNEL_GPU__)
ccl_device_inline void integrator_state_copy_only(const IntegratorState to_state,
const IntegratorState state)
{
int index;
/* Rely on the compiler to optimize out unused assignments and `while(false)`'s. */
# define KERNEL_STRUCT_BEGIN(name) \
index = 0; \
do {
# define KERNEL_STRUCT_MEMBER(parent_struct, type, name, feature) \
if (kernel_integrator_state.parent_struct.name != nullptr) { \
kernel_integrator_state.parent_struct.name[to_state] = \
kernel_integrator_state.parent_struct.name[state]; \
}
# define KERNEL_STRUCT_ARRAY_MEMBER(parent_struct, type, name, feature) \
if (kernel_integrator_state.parent_struct[index].name != nullptr) { \
kernel_integrator_state.parent_struct[index].name[to_state] = \
kernel_integrator_state.parent_struct[index].name[state]; \
}
# define KERNEL_STRUCT_END(name) \
} \
while (false) \
;
# define KERNEL_STRUCT_END_ARRAY(name, array_size) \
++index; \
} \
while (index < array_size) \
;
# include "kernel/integrator/integrator_state_template.h"
# undef KERNEL_STRUCT_BEGIN
# undef KERNEL_STRUCT_MEMBER
# undef KERNEL_STRUCT_ARRAY_MEMBER
# undef KERNEL_STRUCT_END
# undef KERNEL_STRUCT_END_ARRAY
}
ccl_device_inline void integrator_state_move(const IntegratorState to_state,
const IntegratorState state)
{
integrator_state_copy_only(to_state, state);
INTEGRATOR_STATE_WRITE(path, queued_kernel) = 0;
INTEGRATOR_STATE_WRITE(shadow_path, queued_kernel) = 0;
}
#endif
/* NOTE: Leaves kernel scheduling information untouched. Use INIT semantic for one of the paths
* after this function. */
ccl_device_inline void integrator_state_shadow_catcher_split(INTEGRATOR_STATE_ARGS)
{
#if defined(__KERNEL_GPU__)
const IntegratorState to_state = atomic_fetch_and_add_uint32(
&kernel_integrator_state.next_shadow_catcher_path_index[0], 1);
integrator_state_copy_only(to_state, state);
kernel_integrator_state.path.flag[to_state] |= PATH_RAY_SHADOW_CATCHER_PASS;
/* Sanity check: expect to split in the intersect-closest kernel, where there is no shadow ray
* and no sorting yet. */
kernel_assert(INTEGRATOR_STATE(shadow_path, queued_kernel) == 0);
kernel_assert(kernel_integrator_state.sort_key_counter[INTEGRATOR_STATE(path, queued_kernel)] ==
nullptr);
#else
IntegratorStateCPU *ccl_restrict split_state = state + 1;
*split_state = *state;
split_state->path.flag |= PATH_RAY_SHADOW_CATCHER_PASS;
#endif
}
CCL_NAMESPACE_END
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