blender/intern/cycles/kernel/kernel_shader.h
Brecht Van Lommel 16204bd647 Cycles: prepare to make CUDA 5.0 the official version we use
* Add CUDA compiler version detection to cmake/scons/runtime
* Remove noinline in kernel_shader.h and reenable --use_fast_math if CUDA 5.x
  is used, these were workarounds for CUDA 4.2 bugs
* Change max number of registers to 32 for sm 2.x (based on performance tests
  from Martijn Berger and confirmed here), and also for NVidia OpenCL.

Overall it seems that with these changes and the latest CUDA 5.0 download, that
performance is as good as or better than the 2.67b release with the scenes and
graphics cards I tested.
2013-06-19 17:54:23 +00:00

947 lines
22 KiB
C

/*
* Copyright 2011, Blender Foundation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/*
* ShaderData, used in four steps:
*
* Setup from incoming ray, sampled position and background.
* Execute for surface, volume or displacement.
* Evaluate one or more closures.
* Release.
*
*/
#include "closure/bsdf_util.h"
#include "closure/bsdf.h"
#include "closure/emissive.h"
#include "closure/volume.h"
#include "svm/svm.h"
CCL_NAMESPACE_BEGIN
/* ShaderData setup from incoming ray */
#ifdef __OBJECT_MOTION__
#if defined(__KERNEL_CUDA_VERSION__) && __KERNEL_CUDA_VERSION__ <= 42
__device_noinline
#else
__device
#endif
void shader_setup_object_transforms(KernelGlobals *kg, ShaderData *sd, float time)
{
/* note that this is a separate non-inlined function to work around crash
* on CUDA sm 2.0, otherwise kernel execution crashes (compiler bug?) */
if(sd->flag & SD_OBJECT_MOTION) {
sd->ob_tfm = object_fetch_transform_motion(kg, sd->object, time);
sd->ob_itfm= transform_quick_inverse(sd->ob_tfm);
}
else {
sd->ob_tfm = object_fetch_transform(kg, sd->object, OBJECT_TRANSFORM);
sd->ob_itfm = object_fetch_transform(kg, sd->object, OBJECT_INVERSE_TRANSFORM);
}
}
#endif
#if defined(__KERNEL_CUDA_VERSION__) && __KERNEL_CUDA_VERSION__ <= 42
__device_noinline
#else
__device
#endif
void shader_setup_from_ray(KernelGlobals *kg, ShaderData *sd,
const Intersection *isect, const Ray *ray)
{
#ifdef __INSTANCING__
sd->object = (isect->object == ~0)? kernel_tex_fetch(__prim_object, isect->prim): isect->object;
#endif
sd->flag = kernel_tex_fetch(__object_flag, sd->object);
/* matrices and time */
#ifdef __OBJECT_MOTION__
shader_setup_object_transforms(kg, sd, ray->time);
sd->time = ray->time;
#endif
sd->prim = kernel_tex_fetch(__prim_index, isect->prim);
sd->ray_length = isect->t;
#ifdef __HAIR__
if(kernel_tex_fetch(__prim_segment, isect->prim) != ~0) {
/* Strand Shader setting*/
float4 curvedata = kernel_tex_fetch(__curves, sd->prim);
sd->shader = __float_as_int(curvedata.z);
sd->segment = isect->segment;
float tcorr = isect->t;
if(kernel_data.curve_kernel_data.curveflags & CURVE_KN_POSTINTERSECTCORRECTION) {
tcorr = (isect->u < 0)? tcorr + sqrtf(isect->v) : tcorr - sqrtf(isect->v);
sd->ray_length = tcorr;
}
sd->P = bvh_curve_refine(kg, sd, isect, ray, tcorr);
}
else {
#endif
/* fetch triangle data */
float4 Ns = kernel_tex_fetch(__tri_normal, sd->prim);
float3 Ng = make_float3(Ns.x, Ns.y, Ns.z);
sd->shader = __float_as_int(Ns.w);
#ifdef __HAIR__
sd->segment = ~0;
/*elements for minimum hair width using transparency bsdf*/
/*sd->curve_transparency = 0.0f;*/
/*sd->curve_radius = 0.0f;*/
#endif
#ifdef __UV__
sd->u = isect->u;
sd->v = isect->v;
#endif
/* vectors */
sd->P = bvh_triangle_refine(kg, sd, isect, ray);
sd->Ng = Ng;
sd->N = Ng;
/* smooth normal */
if(sd->shader & SHADER_SMOOTH_NORMAL)
sd->N = triangle_smooth_normal(kg, sd->prim, sd->u, sd->v);
#ifdef __DPDU__
/* dPdu/dPdv */
triangle_dPdudv(kg, &sd->dPdu, &sd->dPdv, sd->prim);
#endif
#ifdef __HAIR__
}
#endif
sd->I = -ray->D;
sd->flag |= kernel_tex_fetch(__shader_flag, (sd->shader & SHADER_MASK)*2);
#ifdef __INSTANCING__
if(isect->object != ~0) {
/* instance transform */
object_normal_transform(kg, sd, &sd->N);
object_normal_transform(kg, sd, &sd->Ng);
#ifdef __DPDU__
object_dir_transform(kg, sd, &sd->dPdu);
object_dir_transform(kg, sd, &sd->dPdv);
#endif
}
#endif
/* backfacing test */
bool backfacing = (dot(sd->Ng, sd->I) < 0.0f);
if(backfacing) {
sd->flag |= SD_BACKFACING;
sd->Ng = -sd->Ng;
sd->N = -sd->N;
#ifdef __DPDU__
sd->dPdu = -sd->dPdu;
sd->dPdv = -sd->dPdv;
#endif
}
#ifdef __RAY_DIFFERENTIALS__
/* differentials */
differential_transfer(&sd->dP, ray->dP, ray->D, ray->dD, sd->Ng, isect->t);
differential_incoming(&sd->dI, ray->dD);
differential_dudv(&sd->du, &sd->dv, sd->dPdu, sd->dPdv, sd->dP, sd->Ng);
#endif
}
/* ShaderData setup from BSSRDF scatter */
#ifdef __SUBSURFACE__
__device_inline void shader_setup_from_subsurface(KernelGlobals *kg, ShaderData *sd,
const Intersection *isect, const Ray *ray)
{
bool backfacing = sd->flag & SD_BACKFACING;
/* object, matrices, time, ray_length stay the same */
sd->flag = kernel_tex_fetch(__object_flag, sd->object);
sd->prim = kernel_tex_fetch(__prim_index, isect->prim);
#ifdef __HAIR__
if(kernel_tex_fetch(__prim_segment, isect->prim) != ~0) {
/* Strand Shader setting*/
float4 curvedata = kernel_tex_fetch(__curves, sd->prim);
sd->shader = __float_as_int(curvedata.z);
sd->segment = isect->segment;
float tcorr = isect->t;
if(kernel_data.curve_kernel_data.curveflags & CURVE_KN_POSTINTERSECTCORRECTION)
tcorr = (isect->u < 0)? tcorr + sqrtf(isect->v) : tcorr - sqrtf(isect->v);
sd->P = bvh_curve_refine(kg, sd, isect, ray, tcorr);
}
else {
#endif
/* fetch triangle data */
float4 Ns = kernel_tex_fetch(__tri_normal, sd->prim);
float3 Ng = make_float3(Ns.x, Ns.y, Ns.z);
sd->shader = __float_as_int(Ns.w);
#ifdef __HAIR__
sd->segment = ~0;
#endif
#ifdef __UV__
sd->u = isect->u;
sd->v = isect->v;
#endif
/* vectors */
sd->P = bvh_triangle_refine(kg, sd, isect, ray);
sd->Ng = Ng;
sd->N = Ng;
/* smooth normal */
if(sd->shader & SHADER_SMOOTH_NORMAL)
sd->N = triangle_smooth_normal(kg, sd->prim, sd->u, sd->v);
#ifdef __DPDU__
/* dPdu/dPdv */
triangle_dPdudv(kg, &sd->dPdu, &sd->dPdv, sd->prim);
#endif
#ifdef __HAIR__
}
#endif
sd->flag |= kernel_tex_fetch(__shader_flag, (sd->shader & SHADER_MASK)*2);
#ifdef __INSTANCING__
if(isect->object != ~0) {
/* instance transform */
object_normal_transform(kg, sd, &sd->N);
object_normal_transform(kg, sd, &sd->Ng);
#ifdef __DPDU__
object_dir_transform(kg, sd, &sd->dPdu);
object_dir_transform(kg, sd, &sd->dPdv);
#endif
}
#endif
/* backfacing test */
if(backfacing) {
sd->flag |= SD_BACKFACING;
sd->Ng = -sd->Ng;
sd->N = -sd->N;
#ifdef __DPDU__
sd->dPdu = -sd->dPdu;
sd->dPdv = -sd->dPdv;
#endif
}
/* should not get used in principle as the shading will only use a diffuse
* BSDF, but the shader might still access it */
sd->I = sd->N;
#ifdef __RAY_DIFFERENTIALS__
/* differentials */
differential_dudv(&sd->du, &sd->dv, sd->dPdu, sd->dPdv, sd->dP, sd->Ng);
/* don't modify dP and dI */
#endif
}
#endif
/* ShaderData setup from position sampled on mesh */
#if defined(__KERNEL_CUDA_VERSION__) && __KERNEL_CUDA_VERSION__ <= 42
__device_noinline
#else
__device
#endif
void shader_setup_from_sample(KernelGlobals *kg, ShaderData *sd,
const float3 P, const float3 Ng, const float3 I,
int shader, int object, int prim, float u, float v, float t, float time, int segment)
{
/* vectors */
sd->P = P;
sd->N = Ng;
sd->Ng = Ng;
sd->I = I;
sd->shader = shader;
#ifdef __HAIR__
sd->segment = segment;
#endif
/* primitive */
#ifdef __INSTANCING__
sd->object = object;
#endif
/* currently no access to bvh prim index for strand sd->prim - this will cause errors with needs fixing*/
sd->prim = prim;
#ifdef __UV__
sd->u = u;
sd->v = v;
#endif
sd->ray_length = t;
/* detect instancing, for non-instanced the object index is -object-1 */
#ifdef __INSTANCING__
bool instanced = false;
if(sd->prim != ~0) {
if(sd->object >= 0)
instanced = true;
else
#endif
sd->object = ~sd->object;
#ifdef __INSTANCING__
}
#endif
sd->flag = kernel_tex_fetch(__shader_flag, (sd->shader & SHADER_MASK)*2);
if(sd->object != -1) {
sd->flag |= kernel_tex_fetch(__object_flag, sd->object);
#ifdef __OBJECT_MOTION__
shader_setup_object_transforms(kg, sd, time);
}
sd->time = time;
#else
}
#endif
/* smooth normal */
#ifdef __HAIR__
if(sd->shader & SHADER_SMOOTH_NORMAL && sd->segment == ~0) {
sd->N = triangle_smooth_normal(kg, sd->prim, sd->u, sd->v);
#else
if(sd->shader & SHADER_SMOOTH_NORMAL) {
sd->N = triangle_smooth_normal(kg, sd->prim, sd->u, sd->v);
#endif
#ifdef __INSTANCING__
if(instanced)
object_normal_transform(kg, sd, &sd->N);
#endif
}
#ifdef __DPDU__
/* dPdu/dPdv */
#ifdef __HAIR__
if(sd->prim == ~0 || sd->segment != ~0) {
sd->dPdu = make_float3(0.0f, 0.0f, 0.0f);
sd->dPdv = make_float3(0.0f, 0.0f, 0.0f);
}
#else
if(sd->prim == ~0) {
sd->dPdu = make_float3(0.0f, 0.0f, 0.0f);
sd->dPdv = make_float3(0.0f, 0.0f, 0.0f);
}
#endif
else {
triangle_dPdudv(kg, &sd->dPdu, &sd->dPdv, sd->prim);
#ifdef __INSTANCING__
if(instanced) {
object_dir_transform(kg, sd, &sd->dPdu);
object_dir_transform(kg, sd, &sd->dPdv);
}
#endif
}
#endif
/* backfacing test */
if(sd->prim != ~0) {
bool backfacing = (dot(sd->Ng, sd->I) < 0.0f);
if(backfacing) {
sd->flag |= SD_BACKFACING;
sd->Ng = -sd->Ng;
sd->N = -sd->N;
#ifdef __DPDU__
sd->dPdu = -sd->dPdu;
sd->dPdv = -sd->dPdv;
#endif
}
}
#ifdef __RAY_DIFFERENTIALS__
/* no ray differentials here yet */
sd->dP = differential3_zero();
sd->dI = differential3_zero();
sd->du = differential_zero();
sd->dv = differential_zero();
#endif
}
/* ShaderData setup for displacement */
__device void shader_setup_from_displace(KernelGlobals *kg, ShaderData *sd,
int object, int prim, float u, float v)
{
float3 P, Ng, I = make_float3(0.0f, 0.0f, 0.0f);
int shader;
P = triangle_point_MT(kg, prim, u, v);
Ng = triangle_normal_MT(kg, prim, &shader);
/* force smooth shading for displacement */
shader |= SHADER_SMOOTH_NORMAL;
/* watch out: no instance transform currently */
shader_setup_from_sample(kg, sd, P, Ng, I, shader, object, prim, u, v, 0.0f, TIME_INVALID, ~0);
}
/* ShaderData setup from ray into background */
__device_inline void shader_setup_from_background(KernelGlobals *kg, ShaderData *sd, const Ray *ray)
{
/* vectors */
sd->P = ray->D;
sd->N = -ray->D;
sd->Ng = -ray->D;
sd->I = -ray->D;
sd->shader = kernel_data.background.shader;
sd->flag = kernel_tex_fetch(__shader_flag, (sd->shader & SHADER_MASK)*2);
#ifdef __OBJECT_MOTION__
sd->time = ray->time;
#endif
sd->ray_length = 0.0f;
#ifdef __INSTANCING__
sd->object = ~0;
#endif
sd->prim = ~0;
#ifdef __HAIR__
sd->segment = ~0;
#endif
#ifdef __UV__
sd->u = 0.0f;
sd->v = 0.0f;
#endif
#ifdef __DPDU__
/* dPdu/dPdv */
sd->dPdu = make_float3(0.0f, 0.0f, 0.0f);
sd->dPdv = make_float3(0.0f, 0.0f, 0.0f);
#endif
#ifdef __RAY_DIFFERENTIALS__
/* differentials */
sd->dP = ray->dD;
differential_incoming(&sd->dI, sd->dP);
sd->du = differential_zero();
sd->dv = differential_zero();
#endif
/* for NDC coordinates */
sd->ray_P = ray->P;
sd->ray_dP = ray->dP;
}
/* BSDF */
#ifdef __MULTI_CLOSURE__
__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)
{
for(int i = 0; i< sd->num_closure; i++) {
if(i == skip_bsdf)
continue;
const ShaderClosure *sc = &sd->closure[i];
if(CLOSURE_IS_BSDF(sc->type)) {
float bsdf_pdf = 0.0f;
float3 eval = bsdf_eval(kg, sd, sc, omega_in, &bsdf_pdf);
if(bsdf_pdf != 0.0f) {
bsdf_eval_accum(result_eval, sc->type, eval*sc->weight);
sum_pdf += bsdf_pdf*sc->sample_weight;
}
sum_sample_weight += sc->sample_weight;
}
}
*pdf = (sum_sample_weight > 0.0f)? sum_pdf/sum_sample_weight: 0.0f;
}
#endif
__device void shader_bsdf_eval(KernelGlobals *kg, const ShaderData *sd,
const float3 omega_in, BsdfEval *eval, float *pdf)
{
#ifdef __MULTI_CLOSURE__
bsdf_eval_init(eval, NBUILTIN_CLOSURES, make_float3(0.0f, 0.0f, 0.0f), kernel_data.film.use_light_pass);
return _shader_bsdf_multi_eval(kg, sd, omega_in, pdf, -1, eval, 0.0f, 0.0f);
#else
const ShaderClosure *sc = &sd->closure;
*pdf = 0.0f;
*eval = bsdf_eval(kg, sd, sc, omega_in, pdf)*sc->weight;
#endif
}
__device int shader_bsdf_sample(KernelGlobals *kg, const ShaderData *sd,
float randu, float randv, BsdfEval *bsdf_eval,
float3 *omega_in, differential3 *domega_in, float *pdf)
{
#ifdef __MULTI_CLOSURE__
int sampled = 0;
if(sd->num_closure > 1) {
/* pick a BSDF closure based on sample weights */
float sum = 0.0f;
for(sampled = 0; sampled < sd->num_closure; sampled++) {
const ShaderClosure *sc = &sd->closure[sampled];
if(CLOSURE_IS_BSDF(sc->type))
sum += sc->sample_weight;
}
float r = sd->randb_closure*sum;
sum = 0.0f;
for(sampled = 0; sampled < sd->num_closure; sampled++) {
const ShaderClosure *sc = &sd->closure[sampled];
if(CLOSURE_IS_BSDF(sc->type)) {
sum += sc->sample_weight;
if(r <= sum)
break;
}
}
if(sampled == sd->num_closure) {
*pdf = 0.0f;
return LABEL_NONE;
}
}
const ShaderClosure *sc = &sd->closure[sampled];
int label;
float3 eval;
*pdf = 0.0f;
label = bsdf_sample(kg, sd, sc, randu, randv, &eval, omega_in, domega_in, pdf);
if(*pdf != 0.0f) {
bsdf_eval_init(bsdf_eval, sc->type, eval*sc->weight, kernel_data.film.use_light_pass);
if(sd->num_closure > 1) {
float sweight = sc->sample_weight;
_shader_bsdf_multi_eval(kg, sd, *omega_in, pdf, sampled, bsdf_eval, *pdf*sweight, sweight);
}
}
return label;
#else
/* sample the single closure that we picked */
*pdf = 0.0f;
int label = bsdf_sample(kg, sd, &sd->closure, randu, randv, bsdf_eval, omega_in, domega_in, pdf);
*bsdf_eval *= sd->closure.weight;
return label;
#endif
}
__device int shader_bsdf_sample_closure(KernelGlobals *kg, const ShaderData *sd,
const ShaderClosure *sc, float randu, float randv, BsdfEval *bsdf_eval,
float3 *omega_in, differential3 *domega_in, float *pdf)
{
int label;
float3 eval;
*pdf = 0.0f;
label = bsdf_sample(kg, sd, sc, randu, randv, &eval, omega_in, domega_in, pdf);
if(*pdf != 0.0f)
bsdf_eval_init(bsdf_eval, sc->type, eval*sc->weight, kernel_data.film.use_light_pass);
return label;
}
__device void shader_bsdf_blur(KernelGlobals *kg, ShaderData *sd, float roughness)
{
#ifdef __MULTI_CLOSURE__
for(int i = 0; i< sd->num_closure; i++) {
ShaderClosure *sc = &sd->closure[i];
if(CLOSURE_IS_BSDF(sc->type))
bsdf_blur(kg, sc, roughness);
}
#else
bsdf_blur(kg, &sd->closure, roughness);
#endif
}
__device float3 shader_bsdf_transparency(KernelGlobals *kg, ShaderData *sd)
{
#ifdef __MULTI_CLOSURE__
float3 eval = make_float3(0.0f, 0.0f, 0.0f);
for(int i = 0; i< sd->num_closure; i++) {
ShaderClosure *sc = &sd->closure[i];
if(sc->type == CLOSURE_BSDF_TRANSPARENT_ID) // todo: make this work for osl
eval += sc->weight;
}
return eval;
#else
if(sd->closure.type == CLOSURE_BSDF_TRANSPARENT_ID)
return sd->closure.weight;
else
return make_float3(0.0f, 0.0f, 0.0f);
#endif
}
__device float3 shader_bsdf_diffuse(KernelGlobals *kg, ShaderData *sd)
{
#ifdef __MULTI_CLOSURE__
float3 eval = make_float3(0.0f, 0.0f, 0.0f);
for(int i = 0; i< sd->num_closure; i++) {
ShaderClosure *sc = &sd->closure[i];
if(CLOSURE_IS_BSDF_DIFFUSE(sc->type))
eval += sc->weight;
}
return eval;
#else
if(CLOSURE_IS_BSDF_DIFFUSE(sd->closure.type))
return sd->closure.weight;
else
return make_float3(0.0f, 0.0f, 0.0f);
#endif
}
__device float3 shader_bsdf_glossy(KernelGlobals *kg, ShaderData *sd)
{
#ifdef __MULTI_CLOSURE__
float3 eval = make_float3(0.0f, 0.0f, 0.0f);
for(int i = 0; i< sd->num_closure; i++) {
ShaderClosure *sc = &sd->closure[i];
if(CLOSURE_IS_BSDF_GLOSSY(sc->type))
eval += sc->weight;
}
return eval;
#else
if(CLOSURE_IS_BSDF_GLOSSY(sd->closure.type))
return sd->closure.weight;
else
return make_float3(0.0f, 0.0f, 0.0f);
#endif
}
__device float3 shader_bsdf_transmission(KernelGlobals *kg, ShaderData *sd)
{
#ifdef __MULTI_CLOSURE__
float3 eval = make_float3(0.0f, 0.0f, 0.0f);
for(int i = 0; i< sd->num_closure; i++) {
ShaderClosure *sc = &sd->closure[i];
if(CLOSURE_IS_BSDF_TRANSMISSION(sc->type))
eval += sc->weight;
}
return eval;
#else
if(CLOSURE_IS_BSDF_TRANSMISSION(sd->closure.type))
return sd->closure.weight;
else
return make_float3(0.0f, 0.0f, 0.0f);
#endif
}
__device float3 shader_bsdf_ao(KernelGlobals *kg, ShaderData *sd, float ao_factor, float3 *N)
{
#ifdef __MULTI_CLOSURE__
float3 eval = make_float3(0.0f, 0.0f, 0.0f);
*N = make_float3(0.0f, 0.0f, 0.0f);
for(int i = 0; i< sd->num_closure; i++) {
ShaderClosure *sc = &sd->closure[i];
if(CLOSURE_IS_BSDF_DIFFUSE(sc->type)) {
eval += sc->weight*ao_factor;
*N += sc->N*average(sc->weight);
}
if(CLOSURE_IS_AMBIENT_OCCLUSION(sc->type)) {
eval += sc->weight;
*N += sd->N*average(sc->weight);
}
}
if(is_zero(*N))
*N = sd->N;
else
*N = normalize(*N);
return eval;
#else
*N = sd->N;
if(CLOSURE_IS_BSDF_DIFFUSE(sd->closure.type))
return sd->closure.weight*ao_factor;
else if(CLOSURE_IS_AMBIENT_OCCLUSION(sd->closure.type))
return sd->closure.weight;
else
return make_float3(0.0f, 0.0f, 0.0f);
#endif
}
/* Emission */
__device float3 emissive_eval(KernelGlobals *kg, ShaderData *sd, ShaderClosure *sc)
{
#ifdef __OSL__
if(kg->osl && sc->prim)
return OSLShader::emissive_eval(sd, sc);
#endif
return emissive_simple_eval(sd->Ng, sd->I);
}
__device float3 shader_emissive_eval(KernelGlobals *kg, ShaderData *sd)
{
float3 eval;
#ifdef __MULTI_CLOSURE__
eval = make_float3(0.0f, 0.0f, 0.0f);
for(int i = 0; i < sd->num_closure; i++) {
ShaderClosure *sc = &sd->closure[i];
if(CLOSURE_IS_EMISSION(sc->type))
eval += emissive_eval(kg, sd, sc)*sc->weight;
}
#else
eval = emissive_eval(kg, sd, &sd->closure)*sd->closure.weight;
#endif
return eval;
}
/* Holdout */
__device float3 shader_holdout_eval(KernelGlobals *kg, ShaderData *sd)
{
#ifdef __MULTI_CLOSURE__
float3 weight = make_float3(0.0f, 0.0f, 0.0f);
for(int i = 0; i < sd->num_closure; i++) {
ShaderClosure *sc = &sd->closure[i];
if(CLOSURE_IS_HOLDOUT(sc->type))
weight += sc->weight;
}
return weight;
#else
if(sd->closure.type == CLOSURE_HOLDOUT_ID)
return make_float3(1.0f, 1.0f, 1.0f);
return make_float3(0.0f, 0.0f, 0.0f);
#endif
}
/* Surface Evaluation */
__device void shader_eval_surface(KernelGlobals *kg, ShaderData *sd,
float randb, int path_flag, ShaderContext ctx)
{
#ifdef __OSL__
if (kg->osl)
OSLShader::eval_surface(kg, sd, randb, path_flag, ctx);
else
#endif
{
#ifdef __SVM__
svm_eval_nodes(kg, sd, SHADER_TYPE_SURFACE, randb, path_flag);
#else
sd->closure.weight = make_float3(0.8f, 0.8f, 0.8f);
sd->closure.N = sd->N;
sd->flag |= bsdf_diffuse_setup(&sd->closure);
#endif
}
}
/* Background Evaluation */
__device float3 shader_eval_background(KernelGlobals *kg, ShaderData *sd, int path_flag, ShaderContext ctx)
{
#ifdef __OSL__
if (kg->osl)
return OSLShader::eval_background(kg, sd, path_flag, ctx);
else
#endif
{
#ifdef __SVM__
svm_eval_nodes(kg, sd, SHADER_TYPE_SURFACE, 0.0f, path_flag);
#ifdef __MULTI_CLOSURE__
float3 eval = make_float3(0.0f, 0.0f, 0.0f);
for(int i = 0; i< sd->num_closure; i++) {
const ShaderClosure *sc = &sd->closure[i];
if(CLOSURE_IS_BACKGROUND(sc->type))
eval += sc->weight;
}
return eval;
#else
if(sd->closure.type == CLOSURE_BACKGROUND_ID)
return sd->closure.weight;
else
return make_float3(0.0f, 0.0f, 0.0f);
#endif
#else
return make_float3(0.8f, 0.8f, 0.8f);
#endif
}
}
/* Volume */
__device float3 shader_volume_eval_phase(KernelGlobals *kg, ShaderData *sd,
float3 omega_in, float3 omega_out)
{
#ifdef __MULTI_CLOSURE__
float3 eval = make_float3(0.0f, 0.0f, 0.0f);
for(int i = 0; i< sd->num_closure; i++) {
const ShaderClosure *sc = &sd->closure[i];
if(CLOSURE_IS_VOLUME(sc->type))
eval += volume_eval_phase(kg, sc, omega_in, omega_out);
}
return eval;
#else
return volume_eval_phase(kg, &sd->closure, omega_in, omega_out);
#endif
}
/* Volume Evaluation */
__device void shader_eval_volume(KernelGlobals *kg, ShaderData *sd,
float randb, int path_flag, ShaderContext ctx)
{
#ifdef __SVM__
#ifdef __OSL__
if (kg->osl)
OSLShader::eval_volume(kg, sd, randb, path_flag, ctx);
else
#endif
svm_eval_nodes(kg, sd, SHADER_TYPE_VOLUME, randb, path_flag);
#endif
}
/* Displacement Evaluation */
__device void shader_eval_displacement(KernelGlobals *kg, ShaderData *sd, ShaderContext ctx)
{
/* this will modify sd->P */
#ifdef __SVM__
#ifdef __OSL__
if (kg->osl)
OSLShader::eval_displacement(kg, sd, ctx);
else
#endif
svm_eval_nodes(kg, sd, SHADER_TYPE_DISPLACEMENT, 0.0f, 0);
#endif
}
/* Transparent Shadows */
#ifdef __TRANSPARENT_SHADOWS__
__device bool shader_transparent_shadow(KernelGlobals *kg, Intersection *isect)
{
int prim = kernel_tex_fetch(__prim_index, isect->prim);
int shader = 0;
#ifdef __HAIR__
if(kernel_tex_fetch(__prim_segment, isect->prim) == ~0) {
#endif
float4 Ns = kernel_tex_fetch(__tri_normal, prim);
shader = __float_as_int(Ns.w);
#ifdef __HAIR__
}
else {
float4 str = kernel_tex_fetch(__curves, prim);
shader = __float_as_int(str.z);
}
#endif
int flag = kernel_tex_fetch(__shader_flag, (shader & SHADER_MASK)*2);
return (flag & SD_HAS_TRANSPARENT_SHADOW) != 0;
}
#endif
/* Merging */
#ifdef __NON_PROGRESSIVE__
__device void shader_merge_closures(KernelGlobals *kg, 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 && sci->type == scj->type && sci->data0 == scj->data0 && sci->data1 == scj->data1) {
#else
if(sci->type == scj->type && sci->data0 == scj->data0 && sci->data1 == scj->data1) {
#endif
sci->weight += scj->weight;
sci->sample_weight += scj->sample_weight;
int size = sd->num_closure - (j+1);
if(size > 0)
memmove(scj, scj+1, size*sizeof(ShaderClosure));
sd->num_closure--;
j--;
}
}
}
}
#endif
CCL_NAMESPACE_END