forked from bartvdbraak/blender
95b85a8c37
This does not actually work: The context must not be shared between threads, but using the same context between different samples actually seems to prevent OSL from switching between shaders. The proper solution would be to ensure memory pooling works correctly. This reverts commit 69f87e69258d6266dcb20f09f7e3d4021e663432.
464 lines
14 KiB
C++
464 lines
14 KiB
C++
/*
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* Copyright 2011, Blender Foundation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "kernel_compat_cpu.h"
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#include "kernel_types.h"
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#include "kernel_globals.h"
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#include "kernel_object.h"
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#include "osl_services.h"
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#include "osl_shader.h"
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#include "util_foreach.h"
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#include <OSL/oslexec.h>
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CCL_NAMESPACE_BEGIN
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tls_ptr(OSLGlobals::ThreadData, OSLGlobals::thread_data);
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/* Threads */
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void OSLShader::thread_init(KernelGlobals *kg)
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{
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OSL::ShadingSystem *ss = kg->osl.ss;
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OSLGlobals::ThreadData *tdata = new OSLGlobals::ThreadData();
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memset(&tdata->globals, 0, sizeof(OSL::ShaderGlobals));
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tdata->thread_info = ss->create_thread_info();
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tls_set(kg->osl.thread_data, tdata);
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kg->osl.services->thread_init(kg);
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}
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void OSLShader::thread_free(KernelGlobals *kg)
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{
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OSL::ShadingSystem *ss = kg->osl.ss;
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OSLGlobals::ThreadData *tdata = tls_get(OSLGlobals::ThreadData, kg->osl.thread_data);
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ss->destroy_thread_info(tdata->thread_info);
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delete tdata;
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}
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/* Globals */
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#define TO_VEC3(v) (*(OSL::Vec3 *)&(v))
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#define TO_COLOR3(v) (*(OSL::Color3 *)&(v))
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#define TO_FLOAT3(v) make_float3(v[0], v[1], v[2])
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static void shaderdata_to_shaderglobals(KernelGlobals *kg, ShaderData *sd,
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int path_flag, OSL::ShaderGlobals *globals)
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{
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/* copy from shader data to shader globals */
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globals->P = TO_VEC3(sd->P);
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globals->dPdx = TO_VEC3(sd->dP.dx);
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globals->dPdy = TO_VEC3(sd->dP.dy);
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globals->I = TO_VEC3(sd->I);
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globals->dIdx = TO_VEC3(sd->dI.dx);
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globals->dIdy = TO_VEC3(sd->dI.dy);
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globals->N = TO_VEC3(sd->N);
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globals->Ng = TO_VEC3(sd->Ng);
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globals->u = sd->u;
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globals->dudx = sd->du.dx;
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globals->dudy = sd->du.dy;
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globals->v = sd->v;
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globals->dvdx = sd->dv.dx;
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globals->dvdy = sd->dv.dy;
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globals->dPdu = TO_VEC3(sd->dPdu);
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globals->dPdv = TO_VEC3(sd->dPdv);
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globals->surfacearea = (sd->object == ~0) ? 1.0f : object_surface_area(kg, sd->object);
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/* booleans */
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globals->raytype = path_flag; /* todo: add our own ray types */
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globals->backfacing = (sd->flag & SD_BACKFACING);
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/* don't know yet if we need this */
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globals->flipHandedness = false;
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/* shader data to be used in services callbacks */
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globals->renderstate = sd;
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/* hacky, we leave it to services to fetch actual object matrix */
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globals->shader2common = sd;
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globals->object2common = sd;
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/* must be set to NULL before execute */
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globals->Ci = NULL;
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}
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/* Surface */
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static void flatten_surface_closure_tree(ShaderData *sd, bool no_glossy,
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const OSL::ClosureColor *closure, float3 weight = make_float3(1.0f, 1.0f, 1.0f))
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{
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/* OSL gives us a closure tree, we flatten it into arrays per
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* closure type, for evaluation, sampling, etc later on. */
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if (closure->type == OSL::ClosureColor::COMPONENT) {
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OSL::ClosureComponent *comp = (OSL::ClosureComponent *)closure;
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OSL::ClosurePrimitive *prim = (OSL::ClosurePrimitive *)comp->data();
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if (prim) {
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ShaderClosure sc;
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sc.prim = prim;
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sc.weight = weight;
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switch (prim->category()) {
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case OSL::ClosurePrimitive::BSDF: {
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if (sd->num_closure == MAX_CLOSURE)
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return;
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OSL::BSDFClosure *bsdf = (OSL::BSDFClosure *)prim;
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ustring scattering = bsdf->scattering();
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/* no caustics option */
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if (no_glossy && scattering == OSL::Labels::GLOSSY)
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return;
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/* sample weight */
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float albedo = bsdf->albedo(TO_VEC3(sd->I));
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float sample_weight = fabsf(average(weight)) * albedo;
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sc.sample_weight = sample_weight;
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sc.type = CLOSURE_BSDF_ID;
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/* scattering flags */
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if (scattering == OSL::Labels::DIFFUSE)
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sd->flag |= SD_BSDF | SD_BSDF_HAS_EVAL;
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else if (scattering == OSL::Labels::GLOSSY)
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sd->flag |= SD_BSDF | SD_BSDF_HAS_EVAL | SD_BSDF_GLOSSY;
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else
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sd->flag |= SD_BSDF;
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/* add */
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sd->closure[sd->num_closure++] = sc;
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break;
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}
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case OSL::ClosurePrimitive::Emissive: {
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if (sd->num_closure == MAX_CLOSURE)
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return;
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/* sample weight */
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float sample_weight = fabsf(average(weight));
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sc.sample_weight = sample_weight;
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sc.type = CLOSURE_EMISSION_ID;
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/* flag */
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sd->flag |= SD_EMISSION;
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sd->closure[sd->num_closure++] = sc;
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break;
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}
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case OSL::ClosurePrimitive::Holdout:
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if (sd->num_closure == MAX_CLOSURE)
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return;
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sc.sample_weight = 0.0f;
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sc.type = CLOSURE_HOLDOUT_ID;
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sd->flag |= SD_HOLDOUT;
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sd->closure[sd->num_closure++] = sc;
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break;
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case OSL::ClosurePrimitive::BSSRDF:
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case OSL::ClosurePrimitive::Debug:
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break; /* not implemented */
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case OSL::ClosurePrimitive::Background:
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case OSL::ClosurePrimitive::Volume:
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break; /* not relevant */
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}
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}
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}
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else if (closure->type == OSL::ClosureColor::MUL) {
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OSL::ClosureMul *mul = (OSL::ClosureMul *)closure;
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flatten_surface_closure_tree(sd, no_glossy, mul->closure, TO_FLOAT3(mul->weight) * weight);
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}
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else if (closure->type == OSL::ClosureColor::ADD) {
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OSL::ClosureAdd *add = (OSL::ClosureAdd *)closure;
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flatten_surface_closure_tree(sd, no_glossy, add->closureA, weight);
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flatten_surface_closure_tree(sd, no_glossy, add->closureB, weight);
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}
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}
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void OSLShader::eval_surface(KernelGlobals *kg, ShaderData *sd, float randb, int path_flag)
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{
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/* gather pointers */
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OSL::ShadingSystem *ss = kg->osl.ss;
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OSLGlobals::ThreadData *tdata = tls_get(OSLGlobals::ThreadData, kg->osl.thread_data);
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OSL::ShaderGlobals *globals = &tdata->globals;
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OSL::ShadingContext *ctx = ss->get_context(tdata->thread_info);
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/* setup shader globals from shader data */
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sd->osl_ctx = ctx;
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shaderdata_to_shaderglobals(kg, sd, path_flag, globals);
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/* execute shader for this point */
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int shader = sd->shader & SHADER_MASK;
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if (kg->osl.surface_state[shader])
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ss->execute(*ctx, *(kg->osl.surface_state[shader]), *globals);
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/* flatten closure tree */
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sd->num_closure = 0;
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sd->randb_closure = randb;
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if (globals->Ci) {
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bool no_glossy = (path_flag & PATH_RAY_DIFFUSE) && kernel_data.integrator.no_caustics;
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flatten_surface_closure_tree(sd, no_glossy, globals->Ci);
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}
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}
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/* Background */
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static float3 flatten_background_closure_tree(const OSL::ClosureColor *closure)
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{
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/* OSL gives us a closure tree, if we are shading for background there
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* is only one supported closure type at the moment, which has no evaluation
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* functions, so we just sum the weights */
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if (closure->type == OSL::ClosureColor::COMPONENT) {
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OSL::ClosureComponent *comp = (OSL::ClosureComponent *)closure;
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OSL::ClosurePrimitive *prim = (OSL::ClosurePrimitive *)comp->data();
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if (prim && prim->category() == OSL::ClosurePrimitive::Background)
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return make_float3(1.0f, 1.0f, 1.0f);
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}
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else if (closure->type == OSL::ClosureColor::MUL) {
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OSL::ClosureMul *mul = (OSL::ClosureMul *)closure;
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return TO_FLOAT3(mul->weight) * flatten_background_closure_tree(mul->closure);
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}
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else if (closure->type == OSL::ClosureColor::ADD) {
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OSL::ClosureAdd *add = (OSL::ClosureAdd *)closure;
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return flatten_background_closure_tree(add->closureA) +
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flatten_background_closure_tree(add->closureB);
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}
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return make_float3(0.0f, 0.0f, 0.0f);
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}
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float3 OSLShader::eval_background(KernelGlobals *kg, ShaderData *sd, int path_flag)
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{
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/* gather pointers */
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OSL::ShadingSystem *ss = kg->osl.ss;
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OSLGlobals::ThreadData *tdata = tls_get(OSLGlobals::ThreadData, kg->osl.thread_data);
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OSL::ShaderGlobals *globals = &tdata->globals;
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OSL::ShadingContext *ctx = ss->get_context(tdata->thread_info);
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/* setup shader globals from shader data */
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sd->osl_ctx = ctx;
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shaderdata_to_shaderglobals(kg, sd, path_flag, globals);
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/* execute shader for this point */
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if (kg->osl.background_state)
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ss->execute(*ctx, *(kg->osl.background_state), *globals);
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/* return background color immediately */
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if (globals->Ci)
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return flatten_background_closure_tree(globals->Ci);
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return make_float3(0.0f, 0.0f, 0.0f);
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}
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/* Volume */
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static void flatten_volume_closure_tree(ShaderData *sd,
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const OSL::ClosureColor *closure, float3 weight = make_float3(1.0f, 1.0f, 1.0f))
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{
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/* OSL gives us a closure tree, we flatten it into arrays per
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* closure type, for evaluation, sampling, etc later on. */
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if (closure->type == OSL::ClosureColor::COMPONENT) {
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OSL::ClosureComponent *comp = (OSL::ClosureComponent *)closure;
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OSL::ClosurePrimitive *prim = (OSL::ClosurePrimitive *)comp->data();
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if (prim) {
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ShaderClosure sc;
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sc.prim = prim;
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sc.weight = weight;
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switch (prim->category()) {
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case OSL::ClosurePrimitive::Volume: {
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if (sd->num_closure == MAX_CLOSURE)
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return;
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/* sample weight */
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float sample_weight = fabsf(average(weight));
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sc.sample_weight = sample_weight;
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sc.type = CLOSURE_VOLUME_ID;
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/* add */
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sd->closure[sd->num_closure++] = sc;
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break;
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}
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case OSL::ClosurePrimitive::Holdout:
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case OSL::ClosurePrimitive::Debug:
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break; /* not implemented */
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case OSL::ClosurePrimitive::Background:
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case OSL::ClosurePrimitive::BSDF:
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case OSL::ClosurePrimitive::Emissive:
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case OSL::ClosurePrimitive::BSSRDF:
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break; /* not relevant */
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}
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}
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}
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else if (closure->type == OSL::ClosureColor::MUL) {
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OSL::ClosureMul *mul = (OSL::ClosureMul *)closure;
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flatten_volume_closure_tree(sd, mul->closure, TO_FLOAT3(mul->weight) * weight);
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}
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else if (closure->type == OSL::ClosureColor::ADD) {
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OSL::ClosureAdd *add = (OSL::ClosureAdd *)closure;
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flatten_volume_closure_tree(sd, add->closureA, weight);
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flatten_volume_closure_tree(sd, add->closureB, weight);
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}
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}
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void OSLShader::eval_volume(KernelGlobals *kg, ShaderData *sd, float randb, int path_flag)
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{
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/* gather pointers */
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OSL::ShadingSystem *ss = kg->osl.ss;
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OSLGlobals::ThreadData *tdata = tls_get(OSLGlobals::ThreadData, kg->osl.thread_data);
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OSL::ShaderGlobals *globals = &tdata->globals;
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OSL::ShadingContext *ctx = ss->get_context(tdata->thread_info);
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/* setup shader globals from shader data */
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sd->osl_ctx = ctx;
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shaderdata_to_shaderglobals(kg, sd, path_flag, globals);
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/* execute shader */
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int shader = sd->shader & SHADER_MASK;
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if (kg->osl.volume_state[shader])
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ss->execute(*ctx, *(kg->osl.volume_state[shader]), *globals);
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if (globals->Ci)
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flatten_volume_closure_tree(sd, globals->Ci);
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}
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/* Displacement */
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void OSLShader::eval_displacement(KernelGlobals *kg, ShaderData *sd)
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{
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/* gather pointers */
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OSL::ShadingSystem *ss = kg->osl.ss;
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OSLGlobals::ThreadData *tdata = tls_get(OSLGlobals::ThreadData, kg->osl.thread_data);
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OSL::ShaderGlobals *globals = &tdata->globals;
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OSL::ShadingContext *ctx = ss->get_context(tdata->thread_info);
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/* setup shader globals from shader data */
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sd->osl_ctx = ctx;
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shaderdata_to_shaderglobals(kg, sd, 0, globals);
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/* execute shader */
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int shader = sd->shader & SHADER_MASK;
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if (kg->osl.displacement_state[shader])
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ss->execute(*ctx, *(kg->osl.displacement_state[shader]), *globals);
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/* get back position */
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sd->P = TO_FLOAT3(globals->P);
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}
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void OSLShader::release(KernelGlobals *kg, const ShaderData *sd)
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{
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OSL::ShadingSystem *ss = kg->osl.ss;
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ss->release_context((OSL::ShadingContext *)sd->osl_ctx);
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}
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/* BSDF Closure */
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int OSLShader::bsdf_sample(const ShaderData *sd, const ShaderClosure *sc, float randu, float randv, float3& eval, float3& omega_in, differential3& domega_in, float& pdf)
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{
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OSL::BSDFClosure *sample_bsdf = (OSL::BSDFClosure *)sc->prim;
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int label = LABEL_NONE;
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pdf = 0.0f;
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/* sample BSDF closure */
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ustring ulabel;
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ulabel = sample_bsdf->sample(TO_VEC3(sd->Ng),
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TO_VEC3(sd->I), TO_VEC3(sd->dI.dx), TO_VEC3(sd->dI.dy),
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randu, randv,
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TO_VEC3(omega_in), TO_VEC3(domega_in.dx), TO_VEC3(domega_in.dy),
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pdf, TO_COLOR3(eval));
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/* convert OSL label */
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if (ulabel == OSL::Labels::REFLECT)
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label = LABEL_REFLECT;
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else if (ulabel == OSL::Labels::TRANSMIT)
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label = LABEL_TRANSMIT;
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else
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return LABEL_NONE; /* sampling failed */
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/* convert scattering to our bitflag label */
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ustring uscattering = sample_bsdf->scattering();
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if (uscattering == OSL::Labels::DIFFUSE)
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label |= LABEL_DIFFUSE;
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else if (uscattering == OSL::Labels::GLOSSY)
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label |= LABEL_GLOSSY;
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else if (uscattering == OSL::Labels::SINGULAR)
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label |= LABEL_SINGULAR;
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else
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label |= LABEL_TRANSPARENT;
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return label;
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}
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float3 OSLShader::bsdf_eval(const ShaderData *sd, const ShaderClosure *sc, const float3& omega_in, float& pdf)
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{
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OSL::BSDFClosure *bsdf = (OSL::BSDFClosure *)sc->prim;
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OSL::Color3 bsdf_eval;
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if (dot(sd->Ng, omega_in) >= 0.0f)
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bsdf_eval = bsdf->eval_reflect(TO_VEC3(sd->I), TO_VEC3(omega_in), pdf);
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else
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bsdf_eval = bsdf->eval_transmit(TO_VEC3(sd->I), TO_VEC3(omega_in), pdf);
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return TO_FLOAT3(bsdf_eval);
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}
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/* Emissive Closure */
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float3 OSLShader::emissive_eval(const ShaderData *sd, const ShaderClosure *sc)
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{
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OSL::EmissiveClosure *emissive = (OSL::EmissiveClosure *)sc->prim;
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OSL::Color3 emissive_eval = emissive->eval(TO_VEC3(sd->Ng), TO_VEC3(sd->I));
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return TO_FLOAT3(emissive_eval);
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}
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/* Volume Closure */
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float3 OSLShader::volume_eval_phase(const ShaderData *sd, const ShaderClosure *sc, const float3 omega_in, const float3 omega_out)
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{
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OSL::VolumeClosure *volume = (OSL::VolumeClosure *)sc->prim;
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OSL::Color3 volume_eval = volume->eval_phase(TO_VEC3(omega_in), TO_VEC3(omega_out));
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return TO_FLOAT3(volume_eval) * sc->weight;
|
|
}
|
|
|
|
CCL_NAMESPACE_END
|
|
|