static void flatten_volume_closure_tree(ShaderData *sd,
const OSL::ClosureColor *closure,
float3 weight = make_float3(1.0f, 1.0f, 1.0f))
{
/* OSL gives us a closure tree, we flatten it into arrays per
* closure type, for evaluation, sampling, etc later on. */
switch(closure->id) {
case OSL::ClosureColor::MUL: {
OSL::ClosureMul *mul = (OSL::ClosureMul *)closure;
flatten_volume_closure_tree(sd, mul->closure, TO_FLOAT3(mul->weight) * weight);
break;
}
case OSL::ClosureColor::ADD: {
OSL::ClosureAdd *add = (OSL::ClosureAdd *)closure;
flatten_volume_closure_tree(sd, add->closureA, weight);
flatten_volume_closure_tree(sd, add->closureB, weight);
break;
}
default: {
OSL::ClosureComponent *comp = (OSL::ClosureComponent *)closure;
CClosurePrimitive *prim = (CClosurePrimitive *)comp->data();
if(prim) {
#ifdef OSL_SUPPORTS_WEIGHTED_CLOSURE_COMPONENTS
weight = weight*TO_FLOAT3(comp->w);
#endif
prim->setup(sd, 0, weight);
}
}
}
}
static void flatten_volume_closure_tree(ShaderData *sd,
const OSL::ClosureColor *closure, float3 weight = make_float3(1.0f, 1.0f, 1.0f))
{
/* OSL gives us a closure tree, we flatten it into arrays per
* closure type, for evaluation, sampling, etc later on. */
if (closure->type == OSL::ClosureColor::COMPONENT) {
OSL::ClosureComponent *comp = (OSL::ClosureComponent *)closure;
CClosurePrimitive *prim = (CClosurePrimitive *)comp->data();
if (prim) {
ShaderClosure sc;
#ifdef OSL_SUPPORTS_WEIGHTED_CLOSURE_COMPONENTS
weight = weight*TO_FLOAT3(comp->w);
#endif
sc.weight = weight;
prim->setup();
switch (prim->category) {
case CClosurePrimitive::Volume: {
/* sample weight */
float sample_weight = fabsf(average(weight));
sc.sample_weight = sample_weight;
sc.type = CLOSURE_VOLUME_ID;
sc.data0 = 0.0f;
sc.data1 = 0.0f;
sc.prim = NULL;
/* add */
if(sc.sample_weight > 1e-5f && sd->num_closure < MAX_CLOSURE)
sd->closure[sd->num_closure++] = sc;
break;
}
case CClosurePrimitive::Holdout:
break; /* not implemented */
case CClosurePrimitive::Background:
case CClosurePrimitive::BSDF:
case CClosurePrimitive::Emissive:
case CClosurePrimitive::BSSRDF:
case CClosurePrimitive::AmbientOcclusion:
break; /* not relevant */
}
}
}
else if (closure->type == OSL::ClosureColor::MUL) {
OSL::ClosureMul *mul = (OSL::ClosureMul *)closure;
flatten_volume_closure_tree(sd, mul->closure, TO_FLOAT3(mul->weight) * weight);
}
else if (closure->type == OSL::ClosureColor::ADD) {
OSL::ClosureAdd *add = (OSL::ClosureAdd *)closure;
flatten_volume_closure_tree(sd, add->closureA, weight);
flatten_volume_closure_tree(sd, add->closureB, weight);
}
}
static void flatten_volume_closure_tree(ShaderData *sd,
const OSL::ClosureColor *closure, float3 weight = make_float3(1.0f, 1.0f, 1.0f))
{
/* OSL gives use a closure tree, we flatten it into arrays per
* closure type, for evaluation, sampling, etc later on. */
if(closure->type == OSL::ClosureColor::COMPONENT) {
OSL::ClosureComponent *comp = (OSL::ClosureComponent*)closure;
OSL::ClosurePrimitive *prim = (OSL::ClosurePrimitive*)comp->data();
if(prim) {
ShaderClosure sc;
sc.prim = prim;
sc.weight = weight;
switch(prim->category()) {
case ClosurePrimitive::Volume: {
if(sd->num_closure == MAX_CLOSURE)
return;
/* sample weight */
float sample_weight = fabsf(average(weight));
float sample_sum = sd->osl_closure.volume_sample_sum + sample_weight;
sc.sample_weight = sample_weight;
sc.type = CLOSURE_VOLUME_ID;
sd->osl_closure.volume_sample_sum = sample_sum;
/* add */
sd->closure[sd->num_closure++] = sc;
break;
}
case ClosurePrimitive::Holdout:
case ClosurePrimitive::Debug:
break; /* not implemented */
case ClosurePrimitive::Background:
case ClosurePrimitive::BSDF:
case ClosurePrimitive::Emissive:
case ClosurePrimitive::BSSRDF:
break; /* not relevant */
}
}
}
else if(closure->type == OSL::ClosureColor::MUL) {
OSL::ClosureMul *mul = (OSL::ClosureMul*)closure;
flatten_volume_closure_tree(sd, mul->closure, TO_FLOAT3(mul->weight) * weight);
}
else if(closure->type == OSL::ClosureColor::ADD) {
OSL::ClosureAdd *add = (OSL::ClosureAdd*)closure;
flatten_volume_closure_tree(sd, add->closureA, weight);
flatten_volume_closure_tree(sd, add->closureB, weight);
}
}
void OSLShader::eval_volume(KernelGlobals *kg, ShaderData *sd, float randb, int path_flag)
{
/* gather pointers */
OSL::pvt::ShadingSystemImpl *ssi = (OSL::pvt::ShadingSystemImpl*)kg->osl.ss;
OSLGlobals::ThreadData *tdata = tls_get(OSLGlobals::ThreadData, kg->osl.thread_data);
OSL::ShaderGlobals *globals = &tdata->globals;
OSL::pvt::ShadingContext *ctx = ssi->get_context(tdata->thread_info);
/* setup shader globals from shader data */
sd->osl_ctx = ctx;
shaderdata_to_shaderglobals(kg, sd, path_flag, globals);
/* execute shader */
int shader = sd->shader & SHADER_MASK;
if(kg->osl.volume_state[shader])
ctx->execute(OSL::pvt::ShadUseSurface, *(kg->osl.volume_state[shader]), *globals);
/* retrieve resulting closures */
sd->osl_closure.volume_sample_sum = 0.0f;
sd->osl_closure.num_volume = 0;
sd->osl_closure.randb = randb;
if(globals->Ci)
flatten_volume_closure_tree(sd, globals->Ci);
}
void OSLShader::eval_volume(KernelGlobals *kg, ShaderData *sd, float randb, int path_flag, ShaderContext ctx)
{
/* setup shader globals from shader data */
OSLThreadData *tdata = kg->osl_tdata;
shaderdata_to_shaderglobals(kg, sd, path_flag, tdata);
/* execute shader */
OSL::ShadingSystem *ss = (OSL::ShadingSystem*)kg->osl_ss;
OSL::ShaderGlobals *globals = &tdata->globals;
OSL::ShadingContext *octx = tdata->context[(int)ctx];
int shader = sd->shader & SHADER_MASK;
if (kg->osl->volume_state[shader])
ss->execute(*octx, *(kg->osl->volume_state[shader]), *globals);
if (globals->Ci)
flatten_volume_closure_tree(sd, globals->Ci);
}
static void flatten_volume_closure_tree(ShaderData *sd,
const OSL::ClosureColor *closure, float3 weight = make_float3(1.0f, 1.0f, 1.0f))
{
/* OSL gives us a closure tree, we flatten it into arrays per
* closure type, for evaluation, sampling, etc later on. */
#if OSL_LIBRARY_VERSION_CODE < 10700
switch(closure->type) {
#else
switch(closure->id) {
#endif
case OSL::ClosureColor::MUL: {
OSL::ClosureMul *mul = (OSL::ClosureMul *)closure;
flatten_volume_closure_tree(sd, mul->closure, TO_FLOAT3(mul->weight) * weight);
break;
}
case OSL::ClosureColor::ADD: {
OSL::ClosureAdd *add = (OSL::ClosureAdd *)closure;
flatten_volume_closure_tree(sd, add->closureA, weight);
flatten_volume_closure_tree(sd, add->closureB, weight);
break;
}
default: {
OSL::ClosureComponent *comp = (OSL::ClosureComponent *)closure;
CClosurePrimitive *prim = (CClosurePrimitive *)comp->data();
if(prim) {
ShaderClosure sc;
#ifdef OSL_SUPPORTS_WEIGHTED_CLOSURE_COMPONENTS
weight = weight*TO_FLOAT3(comp->w);
#endif
sc.weight = weight;
prim->setup();
switch(prim->category) {
case CClosurePrimitive::Volume: {
CVolumeClosure *volume = (CVolumeClosure *)prim;
/* sample weight */
float sample_weight = fabsf(average(weight));
sc.sample_weight = sample_weight;
sc.type = volume->sc.type;
sc.data0 = volume->sc.data0;
sc.data1 = volume->sc.data1;
/* add */
if((sc.sample_weight > CLOSURE_WEIGHT_CUTOFF) &&
(sd->num_closure < MAX_CLOSURE))
{
sd->closure[sd->num_closure++] = sc;
sd->flag |= volume->shaderdata_flag();
}
break;
}
case CClosurePrimitive::Emissive: {
/* sample weight */
float sample_weight = fabsf(average(weight));
sc.sample_weight = sample_weight;
sc.type = CLOSURE_EMISSION_ID;
sc.data0 = 0.0f;
sc.data1 = 0.0f;
sc.prim = NULL;
/* flag */
if(sd->num_closure < MAX_CLOSURE) {
sd->closure[sd->num_closure++] = sc;
sd->flag |= SD_EMISSION;
}
break;
}
case CClosurePrimitive::Holdout:
break; /* not implemented */
case CClosurePrimitive::Background:
case CClosurePrimitive::BSDF:
case CClosurePrimitive::BSSRDF:
case CClosurePrimitive::AmbientOcclusion:
break; /* not relevant */
}
}
}
}
}
void OSLShader::eval_volume(KernelGlobals *kg, ShaderData *sd, PathState *state, int path_flag, ShaderContext ctx)
{
/* setup shader globals from shader data */
OSLThreadData *tdata = kg->osl_tdata;
shaderdata_to_shaderglobals(kg, sd, state, path_flag, tdata);
/* execute shader */
OSL::ShadingSystem *ss = (OSL::ShadingSystem*)kg->osl_ss;
OSL::ShaderGlobals *globals = &tdata->globals;
OSL::ShadingContext *octx = tdata->context[(int)ctx];
int shader = sd->shader & SHADER_MASK;
if(kg->osl->volume_state[shader]) {
#if OSL_LIBRARY_VERSION_CODE < 10600
ss->execute(*octx, *(kg->osl->volume_state[shader]), *globals);
#else
ss->execute(octx, *(kg->osl->volume_state[shader]), *globals);
#endif
}
/* flatten closure tree */
if(globals->Ci)
flatten_volume_closure_tree(sd, globals->Ci);
}
