Differential D12888 Diff 43495 intern/cycles/kernel/integrator/integrator_shade_surface.h

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intern/cycles/kernel/integrator/integrator_shade_surface.h

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#include "kernel/kernel_path_state.h"		#include "kernel/kernel_path_state.h"
#include "kernel/kernel_shader.h"		#include "kernel/kernel_shader.h"

#include "kernel/integrator/integrator_subsurface.h"		#include "kernel/integrator/integrator_subsurface.h"
#include "kernel/integrator/integrator_volume_stack.h"		#include "kernel/integrator/integrator_volume_stack.h"

CCL_NAMESPACE_BEGIN		CCL_NAMESPACE_BEGIN

ccl_device_forceinline void integrate_surface_shader_setup(INTEGRATOR_STATE_CONST_ARGS,		ccl_device_forceinline void integrate_surface_shader_setup(KernelGlobals kg,
		ConstIntegratorState state,
ccl_private ShaderData *sd)		ccl_private ShaderData *sd)
{		{
Intersection isect ccl_optional_struct_init;		Intersection isect ccl_optional_struct_init;
integrator_state_read_isect(INTEGRATOR_STATE_PASS, &isect);		integrator_state_read_isect(kg, state, &isect);

Ray ray ccl_optional_struct_init;		Ray ray ccl_optional_struct_init;
integrator_state_read_ray(INTEGRATOR_STATE_PASS, &ray);		integrator_state_read_ray(kg, state, &ray);

shader_setup_from_ray(kg, sd, &ray, &isect);		shader_setup_from_ray(kg, sd, &ray, &isect);
}		}

#ifdef __HOLDOUT__		#ifdef __HOLDOUT__
ccl_device_forceinline bool integrate_surface_holdout(INTEGRATOR_STATE_CONST_ARGS,		ccl_device_forceinline bool integrate_surface_holdout(KernelGlobals kg,
		ConstIntegratorState state,
ccl_private ShaderData *sd,		ccl_private ShaderData *sd,
ccl_global float *ccl_restrict render_buffer)		ccl_global float *ccl_restrict render_buffer)
{		{
/* Write holdout transparency to render buffer and stop if fully holdout. */		/* Write holdout transparency to render buffer and stop if fully holdout. */
const uint32_t path_flag = INTEGRATOR_STATE(path, flag);		const uint32_t path_flag = INTEGRATOR_STATE(state, path, flag);

if (((sd->flag & SD_HOLDOUT) \|\| (sd->object_flag & SD_OBJECT_HOLDOUT_MASK)) &&		if (((sd->flag & SD_HOLDOUT) \|\| (sd->object_flag & SD_OBJECT_HOLDOUT_MASK)) &&
(path_flag & PATH_RAY_TRANSPARENT_BACKGROUND)) {		(path_flag & PATH_RAY_TRANSPARENT_BACKGROUND)) {
const float3 holdout_weight = shader_holdout_apply(kg, sd);		const float3 holdout_weight = shader_holdout_apply(kg, sd);
if (kernel_data.background.transparent) {		if (kernel_data.background.transparent) {
const float3 throughput = INTEGRATOR_STATE(path, throughput);		const float3 throughput = INTEGRATOR_STATE(state, path, throughput);
const float transparent = average(holdout_weight * throughput);		const float transparent = average(holdout_weight * throughput);
kernel_accum_transparent(INTEGRATOR_STATE_PASS, transparent, render_buffer);		kernel_accum_transparent(kg, state, transparent, render_buffer);
}		}
if (isequal_float3(holdout_weight, one_float3())) {		if (isequal_float3(holdout_weight, one_float3())) {
return false;		return false;
}		}
}		}

return true;		return true;
}		}
#endif /* __HOLDOUT__ */		#endif /* __HOLDOUT__ */

#ifdef __EMISSION__		#ifdef __EMISSION__
ccl_device_forceinline void integrate_surface_emission(INTEGRATOR_STATE_CONST_ARGS,		ccl_device_forceinline void integrate_surface_emission(KernelGlobals kg,
		ConstIntegratorState state,
ccl_private const ShaderData *sd,		ccl_private const ShaderData *sd,
ccl_global float *ccl_restrict		ccl_global float *ccl_restrict
render_buffer)		render_buffer)
{		{
const uint32_t path_flag = INTEGRATOR_STATE(path, flag);		const uint32_t path_flag = INTEGRATOR_STATE(state, path, flag);

/* Evaluate emissive closure. */		/* Evaluate emissive closure. */
float3 L = shader_emissive_eval(sd);		float3 L = shader_emissive_eval(sd);

# ifdef __HAIR__		# ifdef __HAIR__
if (!(path_flag & PATH_RAY_MIS_SKIP) && (sd->flag & SD_USE_MIS) &&		if (!(path_flag & PATH_RAY_MIS_SKIP) && (sd->flag & SD_USE_MIS) &&
(sd->type & PRIMITIVE_ALL_TRIANGLE))		(sd->type & PRIMITIVE_ALL_TRIANGLE))
# else		# else
if (!(path_flag & PATH_RAY_MIS_SKIP) && (sd->flag & SD_USE_MIS))		if (!(path_flag & PATH_RAY_MIS_SKIP) && (sd->flag & SD_USE_MIS))
# endif		# endif
{		{
const float bsdf_pdf = INTEGRATOR_STATE(path, mis_ray_pdf);		const float bsdf_pdf = INTEGRATOR_STATE(state, path, mis_ray_pdf);
const float t = sd->ray_length + INTEGRATOR_STATE(path, mis_ray_t);		const float t = sd->ray_length + INTEGRATOR_STATE(state, path, mis_ray_t);

/* Multiple importance sampling, get triangle light pdf,		/* Multiple importance sampling, get triangle light pdf,
* and compute weight with respect to BSDF pdf. */		* and compute weight with respect to BSDF pdf. */
float pdf = triangle_light_pdf(kg, sd, t);		float pdf = triangle_light_pdf(kg, sd, t);
float mis_weight = power_heuristic(bsdf_pdf, pdf);		float mis_weight = power_heuristic(bsdf_pdf, pdf);

L *= mis_weight;		L *= mis_weight;
}		}

const float3 throughput = INTEGRATOR_STATE(path, throughput);		const float3 throughput = INTEGRATOR_STATE(state, path, throughput);
kernel_accum_emission(INTEGRATOR_STATE_PASS, throughput, L, render_buffer);		kernel_accum_emission(kg, state, throughput, L, render_buffer);
}		}
#endif /* __EMISSION__ */		#endif /* __EMISSION__ */

#ifdef __EMISSION__		#ifdef __EMISSION__
/* Path tracing: sample point on light and evaluate light shader, then		/* Path tracing: sample point on light and evaluate light shader, then
* queue shadow ray to be traced. */		* queue shadow ray to be traced. */
ccl_device_forceinline void integrate_surface_direct_light(INTEGRATOR_STATE_ARGS,		ccl_device_forceinline void integrate_surface_direct_light(KernelGlobals kg,
		IntegratorState state,
ccl_private ShaderData *sd,		ccl_private ShaderData *sd,
ccl_private const RNGState *rng_state)		ccl_private const RNGState *rng_state)
{		{
/* Test if there is a light or BSDF that needs direct light. */		/* Test if there is a light or BSDF that needs direct light. */
if (!(kernel_data.integrator.use_direct_light && (sd->flag & SD_BSDF_HAS_EVAL))) {		if (!(kernel_data.integrator.use_direct_light && (sd->flag & SD_BSDF_HAS_EVAL))) {
return;		return;
}		}

/* Sample position on a light. */		/* Sample position on a light. */
LightSample ls ccl_optional_struct_init;		LightSample ls ccl_optional_struct_init;
{		{
const int path_flag = INTEGRATOR_STATE(path, flag);		const int path_flag = INTEGRATOR_STATE(state, path, flag);
const uint bounce = INTEGRATOR_STATE(path, bounce);		const uint bounce = INTEGRATOR_STATE(state, path, bounce);
float light_u, light_v;		float light_u, light_v;
path_state_rng_2D(kg, rng_state, PRNG_LIGHT_U, &light_u, &light_v);		path_state_rng_2D(kg, rng_state, PRNG_LIGHT_U, &light_u, &light_v);

if (!light_distribution_sample_from_position(		if (!light_distribution_sample_from_position(
kg, light_u, light_v, sd->time, sd->P, bounce, path_flag, &ls)) {		kg, light_u, light_v, sd->time, sd->P, bounce, path_flag, &ls)) {
return;		return;
}		}
}		}

kernel_assert(ls.pdf != 0.0f);		kernel_assert(ls.pdf != 0.0f);

/* Evaluate light shader.		/* Evaluate light shader.
*		*
* TODO: can we reuse sd memory? In theory we can move this after		* TODO: can we reuse sd memory? In theory we can move this after
* integrate_surface_bounce, evaluate the BSDF, and only then evaluate		* integrate_surface_bounce, evaluate the BSDF, and only then evaluate
* the light shader. This could also move to its own kernel, for		* the light shader. This could also move to its own kernel, for
* non-constant light sources. */		* non-constant light sources. */
ShaderDataTinyStorage emission_sd_storage;		ShaderDataTinyStorage emission_sd_storage;
ccl_private ShaderData *emission_sd = AS_SHADER_DATA(&emission_sd_storage);		ccl_private ShaderData *emission_sd = AS_SHADER_DATA(&emission_sd_storage);
const float3 light_eval = light_sample_shader_eval(		const float3 light_eval = light_sample_shader_eval(kg, state, emission_sd, &ls, sd->time);
INTEGRATOR_STATE_PASS, emission_sd, &ls, sd->time);
if (is_zero(light_eval)) {		if (is_zero(light_eval)) {
return;		return;
}		}

/* Evaluate BSDF. */		/* Evaluate BSDF. */
const bool is_transmission = shader_bsdf_is_transmission(sd, ls.D);		const bool is_transmission = shader_bsdf_is_transmission(sd, ls.D);

BsdfEval bsdf_eval ccl_optional_struct_init;		BsdfEval bsdf_eval ccl_optional_struct_init;
Show All 12 Lines	ccl_device_forceinline void integrate_surface_direct_light(KernelGlobals kg,
}		}

/* Create shadow ray. */		/* Create shadow ray. */
Ray ray ccl_optional_struct_init;		Ray ray ccl_optional_struct_init;
light_sample_to_surface_shadow_ray(kg, sd, &ls, &ray);		light_sample_to_surface_shadow_ray(kg, sd, &ls, &ray);
const bool is_light = light_sample_is_light(&ls);		const bool is_light = light_sample_is_light(&ls);

/* Copy volume stack and enter/exit volume. */		/* Copy volume stack and enter/exit volume. */
integrator_state_copy_volume_stack_to_shadow(INTEGRATOR_STATE_PASS);		integrator_state_copy_volume_stack_to_shadow(kg, state);

if (is_transmission) {		if (is_transmission) {
# ifdef __VOLUME__		# ifdef __VOLUME__
shadow_volume_stack_enter_exit(INTEGRATOR_STATE_PASS, sd);		shadow_volume_stack_enter_exit(kg, state, sd);
# endif		# endif
}		}

/* Write shadow ray and associated state to global memory. */		/* Write shadow ray and associated state to global memory. */
integrator_state_write_shadow_ray(INTEGRATOR_STATE_PASS, &ray);		integrator_state_write_shadow_ray(kg, state, &ray);

/* Copy state from main path to shadow path. */		/* Copy state from main path to shadow path. */
const uint16_t bounce = INTEGRATOR_STATE(path, bounce);		const uint16_t bounce = INTEGRATOR_STATE(state, path, bounce);
const uint16_t transparent_bounce = INTEGRATOR_STATE(path, transparent_bounce);		const uint16_t transparent_bounce = INTEGRATOR_STATE(state, path, transparent_bounce);
uint32_t shadow_flag = INTEGRATOR_STATE(path, flag);		uint32_t shadow_flag = INTEGRATOR_STATE(state, path, flag);
shadow_flag \|= (is_light) ? PATH_RAY_SHADOW_FOR_LIGHT : 0;		shadow_flag \|= (is_light) ? PATH_RAY_SHADOW_FOR_LIGHT : 0;
shadow_flag \|= (is_transmission) ? PATH_RAY_TRANSMISSION_PASS : PATH_RAY_REFLECT_PASS;		shadow_flag \|= (is_transmission) ? PATH_RAY_TRANSMISSION_PASS : PATH_RAY_REFLECT_PASS;
const float3 throughput = INTEGRATOR_STATE(path, throughput) * bsdf_eval_sum(&bsdf_eval);		const float3 throughput = INTEGRATOR_STATE(state, path, throughput) * bsdf_eval_sum(&bsdf_eval);

if (kernel_data.kernel_features & KERNEL_FEATURE_LIGHT_PASSES) {		if (kernel_data.kernel_features & KERNEL_FEATURE_LIGHT_PASSES) {
const float3 diffuse_glossy_ratio = (bounce == 0) ?		const float3 diffuse_glossy_ratio = (bounce == 0) ?
bsdf_eval_diffuse_glossy_ratio(&bsdf_eval) :		bsdf_eval_diffuse_glossy_ratio(&bsdf_eval) :
INTEGRATOR_STATE(path, diffuse_glossy_ratio);		INTEGRATOR_STATE(state, path, diffuse_glossy_ratio);
INTEGRATOR_STATE_WRITE(shadow_path, diffuse_glossy_ratio) = diffuse_glossy_ratio;		INTEGRATOR_STATE_WRITE(state, shadow_path, diffuse_glossy_ratio) = diffuse_glossy_ratio;
}		}

INTEGRATOR_STATE_WRITE(shadow_path, flag) = shadow_flag;		INTEGRATOR_STATE_WRITE(state, shadow_path, flag) = shadow_flag;
INTEGRATOR_STATE_WRITE(shadow_path, bounce) = bounce;		INTEGRATOR_STATE_WRITE(state, shadow_path, bounce) = bounce;
INTEGRATOR_STATE_WRITE(shadow_path, transparent_bounce) = transparent_bounce;		INTEGRATOR_STATE_WRITE(state, shadow_path, transparent_bounce) = transparent_bounce;
INTEGRATOR_STATE_WRITE(shadow_path, throughput) = throughput;		INTEGRATOR_STATE_WRITE(state, shadow_path, throughput) = throughput;

if (kernel_data.kernel_features & KERNEL_FEATURE_SHADOW_PASS) {		if (kernel_data.kernel_features & KERNEL_FEATURE_SHADOW_PASS) {
INTEGRATOR_STATE_WRITE(shadow_path, unshadowed_throughput) = throughput;		INTEGRATOR_STATE_WRITE(state, shadow_path, unshadowed_throughput) = throughput;
}		}

/* Branch off shadow kernel. */		/* Branch off shadow kernel. */
INTEGRATOR_SHADOW_PATH_INIT(DEVICE_KERNEL_INTEGRATOR_INTERSECT_SHADOW);		INTEGRATOR_SHADOW_PATH_INIT(DEVICE_KERNEL_INTEGRATOR_INTERSECT_SHADOW);
}		}
#endif		#endif

/* Path tracing: bounce off or through surface with new direction. */		/* Path tracing: bounce off or through surface with new direction. */
ccl_device_forceinline int integrate_surface_bsdf_bssrdf_bounce(		ccl_device_forceinline int integrate_surface_bsdf_bssrdf_bounce(
INTEGRATOR_STATE_ARGS, ccl_private ShaderData sd, ccl_private const RNGState rng_state)		KernelGlobals kg,
		IntegratorState state,
		ccl_private ShaderData *sd,
		ccl_private const RNGState *rng_state)
{		{
/* Sample BSDF or BSSRDF. */		/* Sample BSDF or BSSRDF. */
if (!(sd->flag & (SD_BSDF \| SD_BSSRDF))) {		if (!(sd->flag & (SD_BSDF \| SD_BSSRDF))) {
return LABEL_NONE;		return LABEL_NONE;
}		}

float bsdf_u, bsdf_v;		float bsdf_u, bsdf_v;
path_state_rng_2D(kg, rng_state, PRNG_BSDF_U, &bsdf_u, &bsdf_v);		path_state_rng_2D(kg, rng_state, PRNG_BSDF_U, &bsdf_u, &bsdf_v);
ccl_private const ShaderClosure *sc = shader_bsdf_bssrdf_pick(sd, &bsdf_u);		ccl_private const ShaderClosure *sc = shader_bsdf_bssrdf_pick(sd, &bsdf_u);

#ifdef __SUBSURFACE__		#ifdef __SUBSURFACE__
/* BSSRDF closure, we schedule subsurface intersection kernel. */		/* BSSRDF closure, we schedule subsurface intersection kernel. */
if (CLOSURE_IS_BSSRDF(sc->type)) {		if (CLOSURE_IS_BSSRDF(sc->type)) {
return subsurface_bounce(INTEGRATOR_STATE_PASS, sd, sc);		return subsurface_bounce(kg, state, sd, sc);
}		}
#endif		#endif

/* BSDF closure, sample direction. */		/* BSDF closure, sample direction. */
float bsdf_pdf;		float bsdf_pdf;
BsdfEval bsdf_eval ccl_optional_struct_init;		BsdfEval bsdf_eval ccl_optional_struct_init;
float3 bsdf_omega_in ccl_optional_struct_init;		float3 bsdf_omega_in ccl_optional_struct_init;
differential3 bsdf_domega_in ccl_optional_struct_init;		differential3 bsdf_domega_in ccl_optional_struct_init;
int label;		int label;

label = shader_bsdf_sample_closure(		label = shader_bsdf_sample_closure(
kg, sd, sc, bsdf_u, bsdf_v, &bsdf_eval, &bsdf_omega_in, &bsdf_domega_in, &bsdf_pdf);		kg, sd, sc, bsdf_u, bsdf_v, &bsdf_eval, &bsdf_omega_in, &bsdf_domega_in, &bsdf_pdf);

if (bsdf_pdf == 0.0f \|\| bsdf_eval_is_zero(&bsdf_eval)) {		if (bsdf_pdf == 0.0f \|\| bsdf_eval_is_zero(&bsdf_eval)) {
return LABEL_NONE;		return LABEL_NONE;
}		}

/* Setup ray. Note that clipping works through transparent bounces. */		/* Setup ray. Note that clipping works through transparent bounces. */
INTEGRATOR_STATE_WRITE(ray, P) = ray_offset(sd->P, (label & LABEL_TRANSMIT) ? -sd->Ng : sd->Ng);		INTEGRATOR_STATE_WRITE(state, ray, P) = ray_offset(sd->P,
INTEGRATOR_STATE_WRITE(ray, D) = normalize(bsdf_omega_in);		(label & LABEL_TRANSMIT) ? -sd->Ng : sd->Ng);
INTEGRATOR_STATE_WRITE(ray, t) = (label & LABEL_TRANSPARENT) ?		INTEGRATOR_STATE_WRITE(state, ray, D) = normalize(bsdf_omega_in);
INTEGRATOR_STATE(ray, t) - sd->ray_length :		INTEGRATOR_STATE_WRITE(state, ray, t) = (label & LABEL_TRANSPARENT) ?
		INTEGRATOR_STATE(state, ray, t) - sd->ray_length :
FLT_MAX;		FLT_MAX;

#ifdef __RAY_DIFFERENTIALS__		#ifdef __RAY_DIFFERENTIALS__
INTEGRATOR_STATE_WRITE(ray, dP) = differential_make_compact(sd->dP);		INTEGRATOR_STATE_WRITE(state, ray, dP) = differential_make_compact(sd->dP);
INTEGRATOR_STATE_WRITE(ray, dD) = differential_make_compact(bsdf_domega_in);		INTEGRATOR_STATE_WRITE(state, ray, dD) = differential_make_compact(bsdf_domega_in);
#endif		#endif

/* Update throughput. */		/* Update throughput. */
float3 throughput = INTEGRATOR_STATE(path, throughput);		float3 throughput = INTEGRATOR_STATE(state, path, throughput);
throughput *= bsdf_eval_sum(&bsdf_eval) / bsdf_pdf;		throughput *= bsdf_eval_sum(&bsdf_eval) / bsdf_pdf;
INTEGRATOR_STATE_WRITE(path, throughput) = throughput;		INTEGRATOR_STATE_WRITE(state, path, throughput) = throughput;

if (kernel_data.kernel_features & KERNEL_FEATURE_LIGHT_PASSES) {		if (kernel_data.kernel_features & KERNEL_FEATURE_LIGHT_PASSES) {
if (INTEGRATOR_STATE(path, bounce) == 0) {		if (INTEGRATOR_STATE(state, path, bounce) == 0) {
INTEGRATOR_STATE_WRITE(path,		INTEGRATOR_STATE_WRITE(state, path, diffuse_glossy_ratio) = bsdf_eval_diffuse_glossy_ratio(
diffuse_glossy_ratio) = bsdf_eval_diffuse_glossy_ratio(&bsdf_eval);		&bsdf_eval);
}		}
}		}

/* Update path state */		/* Update path state */
if (label & LABEL_TRANSPARENT) {		if (label & LABEL_TRANSPARENT) {
INTEGRATOR_STATE_WRITE(path, mis_ray_t) += sd->ray_length;		INTEGRATOR_STATE_WRITE(state, path, mis_ray_t) += sd->ray_length;
}		}
else {		else {
INTEGRATOR_STATE_WRITE(path, mis_ray_pdf) = bsdf_pdf;		INTEGRATOR_STATE_WRITE(state, path, mis_ray_pdf) = bsdf_pdf;
INTEGRATOR_STATE_WRITE(path, mis_ray_t) = 0.0f;		INTEGRATOR_STATE_WRITE(state, path, mis_ray_t) = 0.0f;
INTEGRATOR_STATE_WRITE(path, min_ray_pdf) = fminf(bsdf_pdf,		INTEGRATOR_STATE_WRITE(state, path, min_ray_pdf) = fminf(
INTEGRATOR_STATE(path, min_ray_pdf));		bsdf_pdf, INTEGRATOR_STATE(state, path, min_ray_pdf));
}		}

path_state_next(INTEGRATOR_STATE_PASS, label);		path_state_next(kg, state, label);
return label;		return label;
}		}

#ifdef __VOLUME__		#ifdef __VOLUME__
ccl_device_forceinline bool integrate_surface_volume_only_bounce(INTEGRATOR_STATE_ARGS,		ccl_device_forceinline bool integrate_surface_volume_only_bounce(IntegratorState state,
ccl_private ShaderData *sd)		ccl_private ShaderData *sd)
{		{
if (!path_state_volume_next(INTEGRATOR_STATE_PASS)) {		if (!path_state_volume_next(state)) {
return LABEL_NONE;		return LABEL_NONE;
}		}

/* Setup ray position, direction stays unchanged. */		/* Setup ray position, direction stays unchanged. */
INTEGRATOR_STATE_WRITE(ray, P) = ray_offset(sd->P, -sd->Ng);		INTEGRATOR_STATE_WRITE(state, ray, P) = ray_offset(sd->P, -sd->Ng);

/* Clipping works through transparent. */		/* Clipping works through transparent. */
INTEGRATOR_STATE_WRITE(ray, t) -= sd->ray_length;		INTEGRATOR_STATE_WRITE(state, ray, t) -= sd->ray_length;

# ifdef __RAY_DIFFERENTIALS__		# ifdef __RAY_DIFFERENTIALS__
INTEGRATOR_STATE_WRITE(ray, dP) = differential_make_compact(sd->dP);		INTEGRATOR_STATE_WRITE(state, ray, dP) = differential_make_compact(sd->dP);
# endif		# endif

INTEGRATOR_STATE_WRITE(path, mis_ray_t) += sd->ray_length;		INTEGRATOR_STATE_WRITE(state, path, mis_ray_t) += sd->ray_length;

return LABEL_TRANSMIT \| LABEL_TRANSPARENT;		return LABEL_TRANSMIT \| LABEL_TRANSPARENT;
}		}
#endif		#endif

#if defined(__AO__) && defined(__SHADER_RAYTRACE__)		#if defined(__AO__) && defined(__SHADER_RAYTRACE__)
ccl_device_forceinline void integrate_surface_ao_pass(		ccl_device_forceinline void integrate_surface_ao_pass(
INTEGRATOR_STATE_CONST_ARGS,		KernelGlobals kg,
		ConstIntegratorState state,
ccl_private const ShaderData *ccl_restrict sd,		ccl_private const ShaderData *ccl_restrict sd,
ccl_private const RNGState *ccl_restrict rng_state,		ccl_private const RNGState *ccl_restrict rng_state,
ccl_global float *ccl_restrict render_buffer)		ccl_global float *ccl_restrict render_buffer)
{		{
# ifdef __KERNEL_OPTIX__		# ifdef __KERNEL_OPTIX__
optixDirectCall<void>(2, INTEGRATOR_STATE_PASS, sd, rng_state, render_buffer);		optixDirectCall<void>(2, kg, state, sd, rng_state, render_buffer);
}		}

extern "C" __device__ void __direct_callable__ao_pass(		extern "C" __device__ void __direct_callable__ao_pass(
INTEGRATOR_STATE_CONST_ARGS,		KernelGlobals kg,
		ConstIntegratorState state,
ccl_private const ShaderData *ccl_restrict sd,		ccl_private const ShaderData *ccl_restrict sd,
ccl_private const RNGState *ccl_restrict rng_state,		ccl_private const RNGState *ccl_restrict rng_state,
ccl_global float *ccl_restrict render_buffer)		ccl_global float *ccl_restrict render_buffer)
{		{
# endif /* __KERNEL_OPTIX__ */		# endif /* __KERNEL_OPTIX__ */
float bsdf_u, bsdf_v;		float bsdf_u, bsdf_v;
path_state_rng_2D(kg, rng_state, PRNG_BSDF_U, &bsdf_u, &bsdf_v);		path_state_rng_2D(kg, rng_state, PRNG_BSDF_U, &bsdf_u, &bsdf_v);

const float3 ao_N = shader_bsdf_ao_normal(kg, sd);		const float3 ao_N = shader_bsdf_ao_normal(kg, sd);
float3 ao_D;		float3 ao_D;
float ao_pdf;		float ao_pdf;
sample_cos_hemisphere(ao_N, bsdf_u, bsdf_v, &ao_D, &ao_pdf);		sample_cos_hemisphere(ao_N, bsdf_u, bsdf_v, &ao_D, &ao_pdf);

if (dot(sd->Ng, ao_D) > 0.0f && ao_pdf != 0.0f) {		if (dot(sd->Ng, ao_D) > 0.0f && ao_pdf != 0.0f) {
Ray ray ccl_optional_struct_init;		Ray ray ccl_optional_struct_init;
ray.P = ray_offset(sd->P, sd->Ng);		ray.P = ray_offset(sd->P, sd->Ng);
ray.D = ao_D;		ray.D = ao_D;
ray.t = kernel_data.integrator.ao_bounces_distance;		ray.t = kernel_data.integrator.ao_bounces_distance;
ray.time = sd->time;		ray.time = sd->time;
ray.dP = differential_zero_compact();		ray.dP = differential_zero_compact();
ray.dD = differential_zero_compact();		ray.dD = differential_zero_compact();

Intersection isect ccl_optional_struct_init;		Intersection isect ccl_optional_struct_init;
if (!scene_intersect(kg, &ray, PATH_RAY_SHADOW_OPAQUE, &isect)) {		if (!scene_intersect(kg, &ray, PATH_RAY_SHADOW_OPAQUE, &isect)) {
ccl_global float *buffer = kernel_pass_pixel_render_buffer(INTEGRATOR_STATE_PASS,		ccl_global float *buffer = kernel_pass_pixel_render_buffer(kg, state, render_buffer);
render_buffer);		const float3 throughput = INTEGRATOR_STATE(state, path, throughput);
const float3 throughput = INTEGRATOR_STATE(path, throughput);
kernel_write_pass_float3(buffer + kernel_data.film.pass_ao, throughput);		kernel_write_pass_float3(buffer + kernel_data.film.pass_ao, throughput);
}		}
}		}
}		}
#endif /* defined(__AO__) && defined(__SHADER_RAYTRACE__) */		#endif /* defined(__AO__) && defined(__SHADER_RAYTRACE__) */

template<uint node_feature_mask>		template<uint node_feature_mask>
ccl_device bool integrate_surface(INTEGRATOR_STATE_ARGS,		ccl_device bool integrate_surface(KernelGlobals kg,
		IntegratorState state,
ccl_global float *ccl_restrict render_buffer)		ccl_global float *ccl_restrict render_buffer)

{		{
PROFILING_INIT_FOR_SHADER(kg, PROFILING_SHADE_SURFACE_SETUP);		PROFILING_INIT_FOR_SHADER(kg, PROFILING_SHADE_SURFACE_SETUP);

/* Setup shader data. */		/* Setup shader data. */
ShaderData sd;		ShaderData sd;
integrate_surface_shader_setup(INTEGRATOR_STATE_PASS, &sd);		integrate_surface_shader_setup(kg, state, &sd);
PROFILING_SHADER(sd.object, sd.shader);		PROFILING_SHADER(sd.object, sd.shader);

int continue_path_label = 0;		int continue_path_label = 0;

/* Skip most work for volume bounding surface. */		/* Skip most work for volume bounding surface. */
#ifdef __VOLUME__		#ifdef __VOLUME__
if (!(sd.flag & SD_HAS_ONLY_VOLUME)) {		if (!(sd.flag & SD_HAS_ONLY_VOLUME)) {
#endif		#endif
const int path_flag = INTEGRATOR_STATE(path, flag);		const int path_flag = INTEGRATOR_STATE(state, path, flag);

#ifdef __SUBSURFACE__		#ifdef __SUBSURFACE__
/* Can skip shader evaluation for BSSRDF exit point without bump mapping. */		/* Can skip shader evaluation for BSSRDF exit point without bump mapping. */
if (!(path_flag & PATH_RAY_SUBSURFACE) \|\| ((sd.flag & SD_HAS_BSSRDF_BUMP)))		if (!(path_flag & PATH_RAY_SUBSURFACE) \|\| ((sd.flag & SD_HAS_BSSRDF_BUMP)))
#endif		#endif
{		{
/* Evaluate shader. */		/* Evaluate shader. */
PROFILING_EVENT(PROFILING_SHADE_SURFACE_EVAL);		PROFILING_EVENT(PROFILING_SHADE_SURFACE_EVAL);
shader_eval_surface<node_feature_mask>(INTEGRATOR_STATE_PASS, &sd, render_buffer, path_flag);		shader_eval_surface<node_feature_mask>(kg, state, &sd, render_buffer, path_flag);
}		}

#ifdef __SUBSURFACE__		#ifdef __SUBSURFACE__
if (path_flag & PATH_RAY_SUBSURFACE) {		if (path_flag & PATH_RAY_SUBSURFACE) {
/* When coming from inside subsurface scattering, setup a diffuse		/* When coming from inside subsurface scattering, setup a diffuse
* closure to perform lighting at the exit point. */		* closure to perform lighting at the exit point. */
subsurface_shader_data_setup(INTEGRATOR_STATE_PASS, &sd, path_flag);		subsurface_shader_data_setup(kg, state, &sd, path_flag);
INTEGRATOR_STATE_WRITE(path, flag) &= ~PATH_RAY_SUBSURFACE;		INTEGRATOR_STATE_WRITE(state, path, flag) &= ~PATH_RAY_SUBSURFACE;
}		}
#endif		#endif

shader_prepare_surface_closures(INTEGRATOR_STATE_PASS, &sd);		shader_prepare_surface_closures(kg, state, &sd);

#ifdef __HOLDOUT__		#ifdef __HOLDOUT__
/* Evaluate holdout. */		/* Evaluate holdout. */
if (!integrate_surface_holdout(INTEGRATOR_STATE_PASS, &sd, render_buffer)) {		if (!integrate_surface_holdout(kg, state, &sd, render_buffer)) {
return false;		return false;
}		}
#endif		#endif

#ifdef __EMISSION__		#ifdef __EMISSION__
/* Write emission. */		/* Write emission. */
if (sd.flag & SD_EMISSION) {		if (sd.flag & SD_EMISSION) {
integrate_surface_emission(INTEGRATOR_STATE_PASS, &sd, render_buffer);		integrate_surface_emission(kg, state, &sd, render_buffer);
}		}
#endif		#endif

#ifdef __PASSES__		#ifdef __PASSES__
/* Write render passes. */		/* Write render passes. */
PROFILING_EVENT(PROFILING_SHADE_SURFACE_PASSES);		PROFILING_EVENT(PROFILING_SHADE_SURFACE_PASSES);
kernel_write_data_passes(INTEGRATOR_STATE_PASS, &sd, render_buffer);		kernel_write_data_passes(kg, state, &sd, render_buffer);
#endif		#endif

/* Load random number state. */		/* Load random number state. */
RNGState rng_state;		RNGState rng_state;
path_state_rng_load(INTEGRATOR_STATE_PASS, &rng_state);		path_state_rng_load(state, &rng_state);

/* Perform path termination. Most paths have already been terminated in		/* Perform path termination. Most paths have already been terminated in
* the intersect_closest kernel, this is just for emission and for dividing		* the intersect_closest kernel, this is just for emission and for dividing
* throughput by the probability at the right moment.		* throughput by the probability at the right moment.
*		*
* Also ensure we don't do it twice for SSS at both the entry and exit point. */		* Also ensure we don't do it twice for SSS at both the entry and exit point. */
if (!(path_flag & PATH_RAY_SUBSURFACE)) {		if (!(path_flag & PATH_RAY_SUBSURFACE)) {
const float probability = (path_flag & PATH_RAY_TERMINATE_ON_NEXT_SURFACE) ?		const float probability = (path_flag & PATH_RAY_TERMINATE_ON_NEXT_SURFACE) ?
0.0f :		0.0f :
path_state_continuation_probability(INTEGRATOR_STATE_PASS,		path_state_continuation_probability(kg, state, path_flag);
path_flag);
if (probability == 0.0f) {		if (probability == 0.0f) {
return false;		return false;
}		}
else if (probability != 1.0f) {		else if (probability != 1.0f) {
INTEGRATOR_STATE_WRITE(path, throughput) /= probability;		INTEGRATOR_STATE_WRITE(state, path, throughput) /= probability;
}		}
}		}

#ifdef __DENOISING_FEATURES__		#ifdef __DENOISING_FEATURES__
kernel_write_denoising_features_surface(INTEGRATOR_STATE_PASS, &sd, render_buffer);		kernel_write_denoising_features_surface(kg, state, &sd, render_buffer);
#endif		#endif

#ifdef __SHADOW_CATCHER__		#ifdef __SHADOW_CATCHER__
kernel_write_shadow_catcher_bounce_data(INTEGRATOR_STATE_PASS, &sd, render_buffer);		kernel_write_shadow_catcher_bounce_data(kg, state, &sd, render_buffer);
#endif		#endif

/* Direct light. */		/* Direct light. */
PROFILING_EVENT(PROFILING_SHADE_SURFACE_DIRECT_LIGHT);		PROFILING_EVENT(PROFILING_SHADE_SURFACE_DIRECT_LIGHT);
integrate_surface_direct_light(INTEGRATOR_STATE_PASS, &sd, &rng_state);		integrate_surface_direct_light(kg, state, &sd, &rng_state);

#if defined(__AO__) && defined(__SHADER_RAYTRACE__)		#if defined(__AO__) && defined(__SHADER_RAYTRACE__)
/* Ambient occlusion pass. */		/* Ambient occlusion pass. */
if (node_feature_mask & KERNEL_FEATURE_NODE_RAYTRACE) {		if (node_feature_mask & KERNEL_FEATURE_NODE_RAYTRACE) {
if ((kernel_data.film.pass_ao != PASS_UNUSED) &&		if ((kernel_data.film.pass_ao != PASS_UNUSED) &&
(INTEGRATOR_STATE(path, flag) & PATH_RAY_CAMERA)) {		(INTEGRATOR_STATE(state, path, flag) & PATH_RAY_CAMERA)) {
PROFILING_EVENT(PROFILING_SHADE_SURFACE_AO);		PROFILING_EVENT(PROFILING_SHADE_SURFACE_AO);
integrate_surface_ao_pass(INTEGRATOR_STATE_PASS, &sd, &rng_state, render_buffer);		integrate_surface_ao_pass(kg, state, &sd, &rng_state, render_buffer);
}		}
}		}
#endif		#endif

PROFILING_EVENT(PROFILING_SHADE_SURFACE_INDIRECT_LIGHT);		PROFILING_EVENT(PROFILING_SHADE_SURFACE_INDIRECT_LIGHT);
continue_path_label = integrate_surface_bsdf_bssrdf_bounce(		continue_path_label = integrate_surface_bsdf_bssrdf_bounce(kg, state, &sd, &rng_state);
INTEGRATOR_STATE_PASS, &sd, &rng_state);
#ifdef __VOLUME__		#ifdef __VOLUME__
}		}
else {		else {
PROFILING_EVENT(PROFILING_SHADE_SURFACE_INDIRECT_LIGHT);		PROFILING_EVENT(PROFILING_SHADE_SURFACE_INDIRECT_LIGHT);
continue_path_label = integrate_surface_volume_only_bounce(INTEGRATOR_STATE_PASS, &sd);		continue_path_label = integrate_surface_volume_only_bounce(state, &sd);
}		}

if (continue_path_label & LABEL_TRANSMIT) {		if (continue_path_label & LABEL_TRANSMIT) {
/* Enter/Exit volume. */		/* Enter/Exit volume. */
volume_stack_enter_exit(INTEGRATOR_STATE_PASS, &sd);		volume_stack_enter_exit(kg, state, &sd);
}		}
#endif		#endif

return continue_path_label != 0;		return continue_path_label != 0;
}		}

template<uint node_feature_mask = KERNEL_FEATURE_NODE_MASK_SURFACE & ~KERNEL_FEATURE_NODE_RAYTRACE,		template<uint node_feature_mask = KERNEL_FEATURE_NODE_MASK_SURFACE & ~KERNEL_FEATURE_NODE_RAYTRACE,
int current_kernel = DEVICE_KERNEL_INTEGRATOR_SHADE_SURFACE>		int current_kernel = DEVICE_KERNEL_INTEGRATOR_SHADE_SURFACE>
ccl_device_forceinline void integrator_shade_surface(INTEGRATOR_STATE_ARGS,		ccl_device_forceinline void integrator_shade_surface(KernelGlobals kg,
		IntegratorState state,
ccl_global float *ccl_restrict render_buffer)		ccl_global float *ccl_restrict render_buffer)
{		{
if (integrate_surface<node_feature_mask>(INTEGRATOR_STATE_PASS, render_buffer)) {		if (integrate_surface<node_feature_mask>(kg, state, render_buffer)) {
if (INTEGRATOR_STATE(path, flag) & PATH_RAY_SUBSURFACE) {		if (INTEGRATOR_STATE(state, path, flag) & PATH_RAY_SUBSURFACE) {
INTEGRATOR_PATH_NEXT(current_kernel, DEVICE_KERNEL_INTEGRATOR_INTERSECT_SUBSURFACE);		INTEGRATOR_PATH_NEXT(current_kernel, DEVICE_KERNEL_INTEGRATOR_INTERSECT_SUBSURFACE);
}		}
else {		else {
kernel_assert(INTEGRATOR_STATE(ray, t) != 0.0f);		kernel_assert(INTEGRATOR_STATE(state, ray, t) != 0.0f);
INTEGRATOR_PATH_NEXT(current_kernel, DEVICE_KERNEL_INTEGRATOR_INTERSECT_CLOSEST);		INTEGRATOR_PATH_NEXT(current_kernel, DEVICE_KERNEL_INTEGRATOR_INTERSECT_CLOSEST);
}		}
}		}
else {		else {
INTEGRATOR_PATH_TERMINATE(current_kernel);		INTEGRATOR_PATH_TERMINATE(current_kernel);
}		}
}		}

ccl_device_forceinline void integrator_shade_surface_raytrace(		ccl_device_forceinline void integrator_shade_surface_raytrace(
INTEGRATOR_STATE_ARGS, ccl_global float *ccl_restrict render_buffer)		KernelGlobals kg, IntegratorState state, ccl_global float *ccl_restrict render_buffer)
{		{
integrator_shade_surface<KERNEL_FEATURE_NODE_MASK_SURFACE,		integrator_shade_surface<KERNEL_FEATURE_NODE_MASK_SURFACE,
DEVICE_KERNEL_INTEGRATOR_SHADE_SURFACE_RAYTRACE>(INTEGRATOR_STATE_PASS,		DEVICE_KERNEL_INTEGRATOR_SHADE_SURFACE_RAYTRACE>(
render_buffer);		kg, state, render_buffer);
}		}

CCL_NAMESPACE_END		CCL_NAMESPACE_END