Differential D2023 Diff 6741 intern/cycles/kernel/kernel_shader.h

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intern/cycles/kernel/kernel_shader.h

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* Evaluate one or more closures.		* Evaluate one or more closures.
* Release.		* Release.
*		*
*/		*/

#include "closure/bsdf_util.h"		#include "closure/bsdf_util.h"
#include "closure/bsdf.h"		#include "closure/bsdf.h"
#include "closure/emissive.h"		#include "closure/emissive.h"
		#include "closure/merge.h"

#include "svm/svm.h"		#include "svm/svm.h"

CCL_NAMESPACE_BEGIN		CCL_NAMESPACE_BEGIN

/* ShaderData setup from incoming ray */		/* ShaderData setup from incoming ray */

#ifdef __OBJECT_MOTION__		#ifdef __OBJECT_MOTION__
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#endif		#endif

/* for NDC coordinates */		/* for NDC coordinates */
sd->ray_P = ray->P;		sd->ray_P = ray->P;
sd->ray_dP = ray->dP;		sd->ray_dP = ray->dP;
}		}
#endif		#endif

/* Merging */

#if defined(__BRANCHED_PATH__) \|\| defined(__VOLUME__)
ccl_device void shader_merge_closures(ShaderData *sd)
{
/* merge identical closures, better when we sample a single closure at a time */
for(int i = 0; i < sd->num_closure; i++) {
ShaderClosure *sci = &sd->closure[i];

for(int j = i + 1; j < sd->num_closure; j++) {
ShaderClosure *scj = &sd->closure[j];

#ifdef __OSL__
if(sci->prim \|\| scj->prim)
continue;
#endif

if(!(sci->type == scj->type && sci->data0 == scj->data0 && sci->data1 == scj->data1 && sci->data2 == scj->data2))
continue;

if(CLOSURE_IS_BSDF_OR_BSSRDF(sci->type)) {
if(sci->N != scj->N)
continue;
else if(CLOSURE_IS_BSDF_ANISOTROPIC(sci->type) && sci->T != scj->T)
continue;
}

sci->weight += scj->weight;
sci->sample_weight += scj->sample_weight;

int size = sd->num_closure - (j+1);
if(size > 0) {
for(int k = 0; k < size; k++) {
scj[k] = scj[k+1];
}
}

sd->num_closure--;
kernel_assert(sd->num_closure >= 0);
j--;
}
}
}
#endif

/* BSDF */		/* BSDF */

ccl_device_inline void _shader_bsdf_multi_eval(KernelGlobals kg, const ShaderData sd, const float3 omega_in, float *pdf,		ccl_device_inline void _shader_bsdf_multi_eval(KernelGlobals kg, const ShaderData sd, const float3 omega_in, float *pdf,
int skip_bsdf, BsdfEval *result_eval, float sum_pdf, float sum_sample_weight)		int skip_bsdf, BsdfEval *result_eval, float sum_pdf, float sum_sample_weight)
{		{
/* this is the veach one-sample model with balance heuristic, some pdf		/* this is the veach one-sample model with balance heuristic, some pdf
* factors drop out when using balance heuristic weighting */		* factors drop out when using balance heuristic weighting */
for(int i = 0; i < ccl_fetch(sd, num_closure); i++) {		for(int i = 0; i < ccl_fetch(sd, num_closure); i++) {
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/* Surface Evaluation */		/* Surface Evaluation */

ccl_device void shader_eval_surface(KernelGlobals kg, ShaderData sd,		ccl_device void shader_eval_surface(KernelGlobals kg, ShaderData sd,
ccl_addr_space PathState *state, float randb, int path_flag, ShaderContext ctx)		ccl_addr_space PathState *state, float randb, int path_flag, ShaderContext ctx)
{		{
ccl_fetch(sd, num_closure) = 0;		ccl_fetch(sd, num_closure) = 0;
ccl_fetch(sd, randb_closure) = randb;		ccl_fetch(sd, randb_closure) = randb;

		if(ctx == SHADER_CONTEXT_EMISSION)
		path_flag \|= PATH_RAY_EMISSION;

#ifdef __OSL__		#ifdef __OSL__
if(kg->osl)		if(kg->osl)
OSLShader::eval_surface(kg, sd, state, path_flag, ctx);		OSLShader::eval_surface(kg, sd, state, path_flag, ctx);
else		else
#endif		#endif
{		{
#ifdef __SVM__		#ifdef __SVM__
svm_eval_nodes(kg, sd, state, SHADER_TYPE_SURFACE, path_flag);		svm_eval_nodes(kg, sd, state, SHADER_TYPE_SURFACE, path_flag);
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/* Background Evaluation */		/* Background Evaluation */

ccl_device float3 shader_eval_background(KernelGlobals kg, ShaderData sd,		ccl_device float3 shader_eval_background(KernelGlobals kg, ShaderData sd,
ccl_addr_space PathState *state, int path_flag, ShaderContext ctx)		ccl_addr_space PathState *state, int path_flag, ShaderContext ctx)
{		{
ccl_fetch(sd, num_closure) = 0;		ccl_fetch(sd, num_closure) = 0;
ccl_fetch(sd, randb_closure) = 0.0f;		ccl_fetch(sd, randb_closure) = 0.0f;

		if(ctx == SHADER_CONTEXT_EMISSION)
		path_flag \|= PATH_RAY_EMISSION;

#ifdef __OSL__		#ifdef __OSL__
if(kg->osl) {		if(kg->osl) {
return OSLShader::eval_background(kg, sd, state, path_flag, ctx);		return OSLShader::eval_background(kg, sd, state, path_flag, ctx);
}		}
else		else
#endif		#endif

{		{
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OSLShader::eval_volume(kg, sd, state, path_flag, ctx);		OSLShader::eval_volume(kg, sd, state, path_flag, ctx);
}		}
else		else
# endif		# endif
{		{
svm_eval_nodes(kg, sd, state, SHADER_TYPE_VOLUME, path_flag);		svm_eval_nodes(kg, sd, state, SHADER_TYPE_VOLUME, path_flag);
}		}
#endif		#endif

/* merge closures to avoid exceeding number of closures limit */
if(i > 0)
shader_merge_closures(sd);
}		}
}		}

#endif		#endif

/* Displacement Evaluation */		/* Displacement Evaluation */

ccl_device void shader_eval_displacement(KernelGlobals kg, ShaderData sd, ccl_addr_space PathState *state, ShaderContext ctx)		ccl_device void shader_eval_displacement(KernelGlobals kg, ShaderData sd, ccl_addr_space PathState *state, ShaderContext ctx)
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