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/* SPDX-License-Identifier: BSD-3-Clause
*
* Adapted from Open Shading Language
* Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al.
* All Rights Reserved.
*
* Modifications Copyright 2011-2022 Blender Foundation. */
#include <OSL/genclosure.h>
#include <OSL/oslclosure.h>
#include "kernel/types.h"
#include "kernel/osl/globals.h"
#include "kernel/osl/services.h"
#include "util/math.h"
#include "util/param.h"
#include "kernel/device/cpu/compat.h"
#include "kernel/device/cpu/globals.h"
#include "kernel/geom/object.h"
#include "kernel/util/differential.h"
#include "kernel/osl/osl.h"
#define TO_VEC3(v) OSL::Vec3(v.x, v.y, v.z)
#define TO_FLOAT3(v) make_float3(v[0], v[1], v[2])
CCL_NAMESPACE_BEGIN
static_assert(sizeof(OSLClosure) == sizeof(OSL::ClosureColor) &&
sizeof(OSLClosureAdd) == sizeof(OSL::ClosureAdd) &&
sizeof(OSLClosureMul) == sizeof(OSL::ClosureMul) &&
sizeof(OSLClosureComponent) == sizeof(OSL::ClosureComponent));
static_assert(sizeof(ShaderGlobals) == sizeof(OSL::ShaderGlobals) &&
offsetof(ShaderGlobals, Ci) == offsetof(OSL::ShaderGlobals, Ci));
/* Registration */
#define OSL_CLOSURE_STRUCT_BEGIN(Upper, lower) \
static OSL::ClosureParam *osl_closure_##lower##_params() \
{ \
static OSL::ClosureParam params[] = {
#define OSL_CLOSURE_STRUCT_END(Upper, lower) \
CLOSURE_STRING_KEYPARAM(Upper##Closure, label, "label"), CLOSURE_FINISH_PARAM(Upper##Closure) \
} \
; \
return params; \
}
#define OSL_CLOSURE_STRUCT_MEMBER(Upper, TYPE, type, name, key) \
CLOSURE_##TYPE##_KEYPARAM(Upper##Closure, name, key),
#define OSL_CLOSURE_STRUCT_ARRAY_MEMBER(Upper, TYPE, type, name, key, size) \
CLOSURE_##TYPE##_ARRAY_PARAM(Upper##Closure, name, size),
#include "closures_template.h"
void OSLRenderServices::register_closures(OSL::ShadingSystem *ss)
{
#define OSL_CLOSURE_STRUCT_BEGIN(Upper, lower) \
ss->register_closure( \
#lower, OSL_CLOSURE_##Upper##_ID, osl_closure_##lower##_params(), nullptr, nullptr);
#include "closures_template.h"
}
/* Surface & Background */
template<>
void osl_eval_nodes<SHADER_TYPE_SURFACE>(const KernelGlobalsCPU *kg,
const void *state,
ShaderData *sd,
uint32_t path_flag)
{
/* setup shader globals from shader data */
OSLThreadData *tdata = kg->osl_tdata;
shaderdata_to_shaderglobals(
kg, sd, path_flag, reinterpret_cast<ShaderGlobals *>(&tdata->globals));
/* clear trace data */
tdata->tracedata.init = false;
/* Used by render-services. */
sd->osl_globals = kg;
if (path_flag & PATH_RAY_SHADOW) {
sd->osl_path_state = nullptr;
sd->osl_shadow_path_state = (const IntegratorShadowStateCPU *)state;
}
else {
sd->osl_path_state = (const IntegratorStateCPU *)state;
sd->osl_shadow_path_state = nullptr;
}
/* execute shader for this point */
OSL::ShadingSystem *ss = (OSL::ShadingSystem *)kg->osl_ss;
OSL::ShaderGlobals *globals = &tdata->globals;
OSL::ShadingContext *octx = tdata->context;
int shader = sd->shader & SHADER_MASK;
if (sd->object == OBJECT_NONE && sd->lamp == LAMP_NONE) {
/* background */
if (kg->osl->background_state) {
ss->execute(octx, *(kg->osl->background_state), *globals);
}
}
else {
/* automatic bump shader */
if (kg->osl->bump_state[shader]) {
/* save state */
const float3 P = sd->P;
const float dP = sd->dP;
const OSL::Vec3 dPdx = globals->dPdx;
const OSL::Vec3 dPdy = globals->dPdy;
/* set state as if undisplaced */
if (sd->flag & SD_HAS_DISPLACEMENT) {
float data[9];
bool found = kg->osl->services->get_attribute(sd,
true,
OSLRenderServices::u_empty,
TypeDesc::TypeVector,
OSLRenderServices::u_geom_undisplaced,
data);
(void)found;
assert(found);
differential3 tmp_dP;
memcpy(&sd->P, data, sizeof(float) * 3);
memcpy(&tmp_dP.dx, data + 3, sizeof(float) * 3);
memcpy(&tmp_dP.dy, data + 6, sizeof(float) * 3);
object_position_transform(kg, sd, &sd->P);
object_dir_transform(kg, sd, &tmp_dP.dx);
object_dir_transform(kg, sd, &tmp_dP.dy);
sd->dP = differential_make_compact(tmp_dP);
globals->P = TO_VEC3(sd->P);
globals->dPdx = TO_VEC3(tmp_dP.dx);
globals->dPdy = TO_VEC3(tmp_dP.dy);
}
/* execute bump shader */
ss->execute(octx, *(kg->osl->bump_state[shader]), *globals);
/* reset state */
sd->P = P;
sd->dP = dP;
globals->P = TO_VEC3(P);
globals->dPdx = TO_VEC3(dPdx);
globals->dPdy = TO_VEC3(dPdy);
}
/* surface shader */
if (kg->osl->surface_state[shader]) {
ss->execute(octx, *(kg->osl->surface_state[shader]), *globals);
}
}
/* flatten closure tree */
if (globals->Ci) {
flatten_closure_tree(kg, sd, path_flag, reinterpret_cast<OSLClosure *>(globals->Ci));
}
}
/* Volume */
template<>
void osl_eval_nodes<SHADER_TYPE_VOLUME>(const KernelGlobalsCPU *kg,
const void *state,
ShaderData *sd,
uint32_t path_flag)
{
/* setup shader globals from shader data */
OSLThreadData *tdata = kg->osl_tdata;
shaderdata_to_shaderglobals(
kg, sd, path_flag, reinterpret_cast<ShaderGlobals *>(&tdata->globals));
/* clear trace data */
tdata->tracedata.init = false;
/* Used by render-services. */
sd->osl_globals = kg;
if (path_flag & PATH_RAY_SHADOW) {
sd->osl_path_state = nullptr;
sd->osl_shadow_path_state = (const IntegratorShadowStateCPU *)state;
}
else {
sd->osl_path_state = (const IntegratorStateCPU *)state;
sd->osl_shadow_path_state = nullptr;
}
/* execute shader */
OSL::ShadingSystem *ss = (OSL::ShadingSystem *)kg->osl_ss;
OSL::ShaderGlobals *globals = &tdata->globals;
OSL::ShadingContext *octx = tdata->context;
int shader = sd->shader & SHADER_MASK;
if (kg->osl->volume_state[shader]) {
ss->execute(octx, *(kg->osl->volume_state[shader]), *globals);
}
/* flatten closure tree */
if (globals->Ci) {
flatten_closure_tree(kg, sd, path_flag, reinterpret_cast<OSLClosure *>(globals->Ci));
}
}
/* Displacement */
template<>
void osl_eval_nodes<SHADER_TYPE_DISPLACEMENT>(const KernelGlobalsCPU *kg,
const void *state,
ShaderData *sd,
uint32_t path_flag)
{
/* setup shader globals from shader data */
OSLThreadData *tdata = kg->osl_tdata;
shaderdata_to_shaderglobals(
kg, sd, path_flag, reinterpret_cast<ShaderGlobals *>(&tdata->globals));
/* clear trace data */
tdata->tracedata.init = false;
/* Used by render-services. */
sd->osl_globals = kg;
sd->osl_path_state = (const IntegratorStateCPU *)state;
sd->osl_shadow_path_state = nullptr;
/* execute shader */
OSL::ShadingSystem *ss = (OSL::ShadingSystem *)kg->osl_ss;
OSL::ShaderGlobals *globals = &tdata->globals;
OSL::ShadingContext *octx = tdata->context;
int shader = sd->shader & SHADER_MASK;
if (kg->osl->displacement_state[shader]) {
ss->execute(octx, *(kg->osl->displacement_state[shader]), *globals);
}
/* get back position */
sd->P = TO_FLOAT3(globals->P);
}
CCL_NAMESPACE_END
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