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test/intern/cycles/device/optix/device_impl.cpp

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/* SPDX-FileCopyrightText: 2019 NVIDIA Corporation
* SPDX-FileCopyrightText: 2019-2022 Blender Foundation
*
* SPDX-License-Identifier: Apache-2.0 */
#ifdef WITH_OPTIX
# include "device/optix/device_impl.h"
# include "device/optix/queue.h"
# include "bvh/bvh.h"
# include "bvh/optix.h"
# include "scene/hair.h"
# include "scene/mesh.h"
# include "scene/object.h"
# include "scene/pointcloud.h"
# include "scene/scene.h"
# include "util/debug.h"
# include "util/log.h"
# include "util/path.h"
# include "util/progress.h"
# include "util/task.h"
# define __KERNEL_OPTIX__
# include "kernel/device/optix/globals.h"
CCL_NAMESPACE_BEGIN
# if OPTIX_ABI_VERSION >= 55
static void execute_optix_task(TaskPool &pool, OptixTask task, OptixResult &failure_reason)
{
OptixTask additional_tasks[16];
unsigned int num_additional_tasks = 0;
const OptixResult result = optixTaskExecute(task, additional_tasks, 16, &num_additional_tasks);
if (result == OPTIX_SUCCESS) {
for (unsigned int i = 0; i < num_additional_tasks; ++i) {
pool.push([&pool, additional_task = additional_tasks[i], &failure_reason] {
execute_optix_task(pool, additional_task, failure_reason);
});
}
}
else {
failure_reason = result;
}
}
# endif
OptiXDevice::OptiXDevice(const DeviceInfo &info, Stats &stats, Profiler &profiler, bool headless)
: CUDADevice(info, stats, profiler, headless),
sbt_data(this, "__sbt", MEM_READ_ONLY),
launch_params(this, "kernel_params", false)
{
/* Make the CUDA context current. */
if (!cuContext) {
/* Do not initialize if CUDA context creation failed already. */
return;
}
const CUDAContextScope scope(this);
/* Create OptiX context for this device. */
OptixDeviceContextOptions options = {};
# ifdef WITH_CYCLES_LOGGING
options.logCallbackLevel = 4; /* Fatal = 1, Error = 2, Warning = 3, Print = 4. */
options.logCallbackFunction = [](unsigned int level, const char *, const char *message, void *) {
switch (level) {
case 1:
LOG_IF(FATAL, VLOG_IS_ON(1)) << message;
break;
case 2:
LOG_IF(ERROR, VLOG_IS_ON(1)) << message;
break;
case 3:
LOG_IF(WARNING, VLOG_IS_ON(1)) << message;
break;
case 4:
LOG_IF(INFO, VLOG_IS_ON(1)) << message;
break;
default:
break;
}
};
# endif
if (DebugFlags().optix.use_debug) {
VLOG_INFO << "Using OptiX debug mode.";
options.validationMode = OPTIX_DEVICE_CONTEXT_VALIDATION_MODE_ALL;
}
optix_assert(optixDeviceContextCreate(cuContext, &options, &context));
# ifdef WITH_CYCLES_LOGGING
optix_assert(optixDeviceContextSetLogCallback(
context, options.logCallbackFunction, options.logCallbackData, options.logCallbackLevel));
# endif
/* Fix weird compiler bug that assigns wrong size. */
launch_params.data_elements = sizeof(KernelParamsOptiX);
/* Allocate launch parameter buffer memory on device. */
launch_params.alloc_to_device(1);
}
OptiXDevice::~OptiXDevice()
{
/* Make CUDA context current. */
const CUDAContextScope scope(this);
free_bvh_memory_delayed();
sbt_data.free();
texture_info.free();
launch_params.free();
/* Unload modules. */
if (optix_module != nullptr) {
optixModuleDestroy(optix_module);
}
for (int i = 0; i < 2; ++i) {
if (builtin_modules[i] != nullptr) {
optixModuleDestroy(builtin_modules[i]);
}
}
for (int i = 0; i < NUM_PIPELINES; ++i) {
if (pipelines[i] != nullptr) {
optixPipelineDestroy(pipelines[i]);
}
}
for (int i = 0; i < NUM_PROGRAM_GROUPS; ++i) {
if (groups[i] != nullptr) {
optixProgramGroupDestroy(groups[i]);
}
}
# ifdef WITH_OSL
for (const OptixModule &module : osl_modules) {
if (module != nullptr) {
optixModuleDestroy(module);
}
}
for (const OptixProgramGroup &group : osl_groups) {
if (group != nullptr) {
optixProgramGroupDestroy(group);
}
}
# endif
optixDeviceContextDestroy(context);
}
unique_ptr<DeviceQueue> OptiXDevice::gpu_queue_create()
{
return make_unique<OptiXDeviceQueue>(this);
}
BVHLayoutMask OptiXDevice::get_bvh_layout_mask(uint /*kernel_features*/) const
{
/* OptiX has its own internal acceleration structure format. */
return BVH_LAYOUT_OPTIX;
}
static string get_optix_include_dir()
{
const char *env_dir = getenv("OPTIX_ROOT_DIR");
const char *default_dir = CYCLES_RUNTIME_OPTIX_ROOT_DIR;
if (env_dir && env_dir[0]) {
const string env_include_dir = path_join(env_dir, "include");
return env_include_dir;
}
if (default_dir[0]) {
const string default_include_dir = path_join(default_dir, "include");
return default_include_dir;
}
return string();
}
string OptiXDevice::compile_kernel_get_common_cflags(const uint kernel_features)
{
string common_cflags = CUDADevice::compile_kernel_get_common_cflags(kernel_features);
/* Add OptiX SDK include directory to include paths. */
common_cflags += string_printf(" -I\"%s\"", get_optix_include_dir().c_str());
/* Specialization for shader ray-tracing. */
if (kernel_features & KERNEL_FEATURE_NODE_RAYTRACE) {
common_cflags += " --keep-device-functions";
}
return common_cflags;
}
bool OptiXDevice::load_kernels(const uint kernel_features)
{
if (have_error()) {
/* Abort early if context creation failed already. */
return false;
}
# ifdef WITH_OSL
const bool use_osl = (kernel_features & KERNEL_FEATURE_OSL);
# else
const bool use_osl = false;
# endif
/* Skip creating OptiX module if only doing denoising. */
const bool need_optix_kernels = (kernel_features &
(KERNEL_FEATURE_PATH_TRACING | KERNEL_FEATURE_BAKING));
/* Detect existence of OptiX kernel and SDK here early. So we can error out
* before compiling the CUDA kernels, to avoid failing right after when
* compiling the OptiX kernel. */
string suffix = use_osl ? "_osl" :
(kernel_features & (KERNEL_FEATURE_NODE_RAYTRACE | KERNEL_FEATURE_MNEE)) ?
"_shader_raytrace" :
"";
string ptx_filename;
if (need_optix_kernels) {
ptx_filename = path_get("lib/kernel_optix" + suffix + ".ptx.zst");
if (use_adaptive_compilation() || path_file_size(ptx_filename) == -1) {
std::string optix_include_dir = get_optix_include_dir();
if (optix_include_dir.empty()) {
set_error(
"Unable to compile OptiX kernels at runtime. Set OPTIX_ROOT_DIR environment variable "
"to a directory containing the OptiX SDK.");
return false;
}
if (!path_is_directory(optix_include_dir)) {
set_error(string_printf(
"OptiX headers not found at %s, unable to compile OptiX kernels at runtime. Install "
"OptiX SDK in the specified location, or set OPTIX_ROOT_DIR environment variable to a "
"directory containing the OptiX SDK.",
optix_include_dir.c_str()));
return false;
}
}
}
/* Load CUDA modules because we need some of the utility kernels. */
if (!CUDADevice::load_kernels(kernel_features)) {
return false;
}
if (!need_optix_kernels) {
return true;
}
const CUDAContextScope scope(this);
/* Unload existing OptiX module and pipelines first. */
if (optix_module != nullptr) {
optixModuleDestroy(optix_module);
optix_module = nullptr;
}
for (int i = 0; i < 2; ++i) {
if (builtin_modules[i] != nullptr) {
optixModuleDestroy(builtin_modules[i]);
builtin_modules[i] = nullptr;
}
}
for (int i = 0; i < NUM_PIPELINES; ++i) {
if (pipelines[i] != nullptr) {
optixPipelineDestroy(pipelines[i]);
pipelines[i] = nullptr;
}
}
for (int i = 0; i < NUM_PROGRAM_GROUPS; ++i) {
if (groups[i] != nullptr) {
optixProgramGroupDestroy(groups[i]);
groups[i] = nullptr;
}
}
# ifdef WITH_OSL
/* Recreating base OptiX module invalidates all OSL modules too, since they link against it. */
for (const OptixModule &module : osl_modules) {
if (module != nullptr) {
optixModuleDestroy(module);
}
}
osl_modules.clear();
for (const OptixProgramGroup &group : osl_groups) {
if (group != nullptr) {
optixProgramGroupDestroy(group);
}
}
osl_groups.clear();
# endif
OptixModuleCompileOptions module_options = {};
module_options.maxRegisterCount = 0; /* Do not set an explicit register limit. */
if (DebugFlags().optix.use_debug) {
module_options.optLevel = OPTIX_COMPILE_OPTIMIZATION_LEVEL_0;
module_options.debugLevel = OPTIX_COMPILE_DEBUG_LEVEL_FULL;
}
else {
module_options.optLevel = OPTIX_COMPILE_OPTIMIZATION_LEVEL_3;
module_options.debugLevel = OPTIX_COMPILE_DEBUG_LEVEL_NONE;
}
module_options.boundValues = nullptr;
module_options.numBoundValues = 0;
# if OPTIX_ABI_VERSION >= 55
module_options.payloadTypes = nullptr;
module_options.numPayloadTypes = 0;
# endif
/* Default to no motion blur and two-level graph, since it is the fastest option. */
pipeline_options.usesMotionBlur = false;
pipeline_options.traversableGraphFlags =
OPTIX_TRAVERSABLE_GRAPH_FLAG_ALLOW_SINGLE_LEVEL_INSTANCING;
pipeline_options.numPayloadValues = 8;
pipeline_options.numAttributeValues = 2; /* u, v */
pipeline_options.exceptionFlags = OPTIX_EXCEPTION_FLAG_NONE;
pipeline_options.pipelineLaunchParamsVariableName = "kernel_params"; /* See globals.h */
pipeline_options.usesPrimitiveTypeFlags = OPTIX_PRIMITIVE_TYPE_FLAGS_TRIANGLE;
if (kernel_features & KERNEL_FEATURE_HAIR) {
if (kernel_features & KERNEL_FEATURE_HAIR_THICK) {
# if OPTIX_ABI_VERSION >= 55
pipeline_options.usesPrimitiveTypeFlags |= OPTIX_PRIMITIVE_TYPE_FLAGS_ROUND_CATMULLROM;
# else
pipeline_options.usesPrimitiveTypeFlags |= OPTIX_PRIMITIVE_TYPE_FLAGS_ROUND_CUBIC_BSPLINE;
# endif
}
else {
pipeline_options.usesPrimitiveTypeFlags |= OPTIX_PRIMITIVE_TYPE_FLAGS_CUSTOM;
}
}
if (kernel_features & KERNEL_FEATURE_POINTCLOUD) {
pipeline_options.usesPrimitiveTypeFlags |= OPTIX_PRIMITIVE_TYPE_FLAGS_CUSTOM;
}
/* Keep track of whether motion blur is enabled, so to enable/disable motion in BVH builds
* This is necessary since objects may be reported to have motion if the Vector pass is
* active, but may still need to be rendered without motion blur if that isn't active as well. */
if (kernel_features & KERNEL_FEATURE_OBJECT_MOTION) {
pipeline_options.usesMotionBlur = true;
/* Motion blur can insert motion transforms into the traversal graph.
* It is no longer a two-level graph then, so need to set flags to allow any configuration. */
pipeline_options.traversableGraphFlags = OPTIX_TRAVERSABLE_GRAPH_FLAG_ALLOW_ANY;
}
{ /* Load and compile PTX module with OptiX kernels. */
string ptx_data;
if (use_adaptive_compilation() || path_file_size(ptx_filename) == -1) {
string cflags = compile_kernel_get_common_cflags(kernel_features);
ptx_filename = compile_kernel(cflags, ("kernel" + suffix).c_str(), "optix", true);
}
if (ptx_filename.empty() || !path_read_compressed_text(ptx_filename, ptx_data)) {
set_error(string_printf("Failed to load OptiX kernel from '%s'", ptx_filename.c_str()));
return false;
}
# if OPTIX_ABI_VERSION >= 84
OptixTask task = nullptr;
OptixResult result = optixModuleCreateWithTasks(context,
&module_options,
&pipeline_options,
ptx_data.data(),
ptx_data.size(),
nullptr,
nullptr,
&optix_module,
&task);
if (result == OPTIX_SUCCESS) {
TaskPool pool;
execute_optix_task(pool, task, result);
pool.wait_work();
}
# elif OPTIX_ABI_VERSION >= 55
OptixTask task = nullptr;
OptixResult result = optixModuleCreateFromPTXWithTasks(context,
&module_options,
&pipeline_options,
ptx_data.data(),
ptx_data.size(),
nullptr,
nullptr,
&optix_module,
&task);
if (result == OPTIX_SUCCESS) {
TaskPool pool;
execute_optix_task(pool, task, result);
pool.wait_work();
}
# else
const OptixResult result = optixModuleCreateFromPTX(context,
&module_options,
&pipeline_options,
ptx_data.data(),
ptx_data.size(),
nullptr,
nullptr,
&optix_module);
# endif
if (result != OPTIX_SUCCESS) {
set_error(string_printf("Failed to load OptiX kernel from '%s' (%s)",
ptx_filename.c_str(),
optixGetErrorName(result)));
return false;
}
}
/* Create program groups. */
OptixProgramGroupDesc group_descs[NUM_PROGRAM_GROUPS] = {};
OptixProgramGroupOptions group_options = {}; /* There are no options currently. */
group_descs[PG_RGEN_INTERSECT_CLOSEST].kind = OPTIX_PROGRAM_GROUP_KIND_RAYGEN;
group_descs[PG_RGEN_INTERSECT_CLOSEST].raygen.module = optix_module;
group_descs[PG_RGEN_INTERSECT_CLOSEST].raygen.entryFunctionName =
"__raygen__kernel_optix_integrator_intersect_closest";
group_descs[PG_RGEN_INTERSECT_SHADOW].kind = OPTIX_PROGRAM_GROUP_KIND_RAYGEN;
group_descs[PG_RGEN_INTERSECT_SHADOW].raygen.module = optix_module;
group_descs[PG_RGEN_INTERSECT_SHADOW].raygen.entryFunctionName =
"__raygen__kernel_optix_integrator_intersect_shadow";
group_descs[PG_RGEN_INTERSECT_SUBSURFACE].kind = OPTIX_PROGRAM_GROUP_KIND_RAYGEN;
group_descs[PG_RGEN_INTERSECT_SUBSURFACE].raygen.module = optix_module;
group_descs[PG_RGEN_INTERSECT_SUBSURFACE].raygen.entryFunctionName =
"__raygen__kernel_optix_integrator_intersect_subsurface";
group_descs[PG_RGEN_INTERSECT_VOLUME_STACK].kind = OPTIX_PROGRAM_GROUP_KIND_RAYGEN;
group_descs[PG_RGEN_INTERSECT_VOLUME_STACK].raygen.module = optix_module;
group_descs[PG_RGEN_INTERSECT_VOLUME_STACK].raygen.entryFunctionName =
"__raygen__kernel_optix_integrator_intersect_volume_stack";
group_descs[PG_RGEN_INTERSECT_DEDICATED_LIGHT].kind = OPTIX_PROGRAM_GROUP_KIND_RAYGEN;
group_descs[PG_RGEN_INTERSECT_DEDICATED_LIGHT].raygen.module = optix_module;
group_descs[PG_RGEN_INTERSECT_DEDICATED_LIGHT].raygen.entryFunctionName =
"__raygen__kernel_optix_integrator_intersect_dedicated_light";
group_descs[PG_MISS].kind = OPTIX_PROGRAM_GROUP_KIND_MISS;
group_descs[PG_MISS].miss.module = optix_module;
group_descs[PG_MISS].miss.entryFunctionName = "__miss__kernel_optix_miss";
group_descs[PG_HITD].kind = OPTIX_PROGRAM_GROUP_KIND_HITGROUP;
group_descs[PG_HITD].hitgroup.moduleCH = optix_module;
group_descs[PG_HITD].hitgroup.entryFunctionNameCH = "__closesthit__kernel_optix_hit";
group_descs[PG_HITD].hitgroup.moduleAH = optix_module;
group_descs[PG_HITD].hitgroup.entryFunctionNameAH = "__anyhit__kernel_optix_visibility_test";
group_descs[PG_HITS].kind = OPTIX_PROGRAM_GROUP_KIND_HITGROUP;
group_descs[PG_HITS].hitgroup.moduleAH = optix_module;
group_descs[PG_HITS].hitgroup.entryFunctionNameAH = "__anyhit__kernel_optix_shadow_all_hit";
group_descs[PG_HITV].kind = OPTIX_PROGRAM_GROUP_KIND_HITGROUP;
group_descs[PG_HITV].hitgroup.moduleCH = optix_module;
group_descs[PG_HITV].hitgroup.entryFunctionNameCH = "__closesthit__kernel_optix_hit";
group_descs[PG_HITV].hitgroup.moduleAH = optix_module;
group_descs[PG_HITV].hitgroup.entryFunctionNameAH = "__anyhit__kernel_optix_volume_test";
if (kernel_features & KERNEL_FEATURE_HAIR) {
if (kernel_features & KERNEL_FEATURE_HAIR_THICK) {
/* Built-in thick curve intersection. */
OptixBuiltinISOptions builtin_options = {};
# if OPTIX_ABI_VERSION >= 55
builtin_options.builtinISModuleType = OPTIX_PRIMITIVE_TYPE_ROUND_CATMULLROM;
builtin_options.buildFlags = OPTIX_BUILD_FLAG_PREFER_FAST_TRACE |
OPTIX_BUILD_FLAG_ALLOW_COMPACTION |
OPTIX_BUILD_FLAG_ALLOW_UPDATE;
builtin_options.curveEndcapFlags = OPTIX_CURVE_ENDCAP_DEFAULT; /* Disable end-caps. */
# else
builtin_options.builtinISModuleType = OPTIX_PRIMITIVE_TYPE_ROUND_CUBIC_BSPLINE;
# endif
builtin_options.usesMotionBlur = false;
optix_assert(optixBuiltinISModuleGet(
context, &module_options, &pipeline_options, &builtin_options, &builtin_modules[0]));
group_descs[PG_HITD].hitgroup.moduleIS = builtin_modules[0];
group_descs[PG_HITD].hitgroup.entryFunctionNameIS = nullptr;
group_descs[PG_HITS].hitgroup.moduleIS = builtin_modules[0];
group_descs[PG_HITS].hitgroup.entryFunctionNameIS = nullptr;
if (pipeline_options.usesMotionBlur) {
builtin_options.usesMotionBlur = true;
optix_assert(optixBuiltinISModuleGet(
context, &module_options, &pipeline_options, &builtin_options, &builtin_modules[1]));
group_descs[PG_HITD_MOTION] = group_descs[PG_HITD];
group_descs[PG_HITD_MOTION].hitgroup.moduleIS = builtin_modules[1];
group_descs[PG_HITS_MOTION] = group_descs[PG_HITS];
group_descs[PG_HITS_MOTION].hitgroup.moduleIS = builtin_modules[1];
}
}
else {
/* Custom ribbon intersection. */
group_descs[PG_HITD].hitgroup.moduleIS = optix_module;
group_descs[PG_HITS].hitgroup.moduleIS = optix_module;
group_descs[PG_HITD].hitgroup.entryFunctionNameIS = "__intersection__curve_ribbon";
group_descs[PG_HITS].hitgroup.entryFunctionNameIS = "__intersection__curve_ribbon";
}
}
if (kernel_features & KERNEL_FEATURE_POINTCLOUD) {
group_descs[PG_HITD_POINTCLOUD] = group_descs[PG_HITD];
group_descs[PG_HITD_POINTCLOUD].kind = OPTIX_PROGRAM_GROUP_KIND_HITGROUP;
group_descs[PG_HITD_POINTCLOUD].hitgroup.moduleIS = optix_module;
group_descs[PG_HITD_POINTCLOUD].hitgroup.entryFunctionNameIS = "__intersection__point";
group_descs[PG_HITS_POINTCLOUD] = group_descs[PG_HITS];
group_descs[PG_HITS_POINTCLOUD].kind = OPTIX_PROGRAM_GROUP_KIND_HITGROUP;
group_descs[PG_HITS_POINTCLOUD].hitgroup.moduleIS = optix_module;
group_descs[PG_HITS_POINTCLOUD].hitgroup.entryFunctionNameIS = "__intersection__point";
}
/* Add hit group for local intersections. */
if (kernel_features & (KERNEL_FEATURE_SUBSURFACE | KERNEL_FEATURE_NODE_RAYTRACE)) {
group_descs[PG_HITL].kind = OPTIX_PROGRAM_GROUP_KIND_HITGROUP;
group_descs[PG_HITL].hitgroup.moduleAH = optix_module;
group_descs[PG_HITL].hitgroup.entryFunctionNameAH = "__anyhit__kernel_optix_local_hit";
}
/* Shader ray-tracing replaces some functions with direct callables. */
if (kernel_features & KERNEL_FEATURE_NODE_RAYTRACE) {
group_descs[PG_RGEN_SHADE_SURFACE_RAYTRACE].kind = OPTIX_PROGRAM_GROUP_KIND_RAYGEN;
group_descs[PG_RGEN_SHADE_SURFACE_RAYTRACE].raygen.module = optix_module;
group_descs[PG_RGEN_SHADE_SURFACE_RAYTRACE].raygen.entryFunctionName =
"__raygen__kernel_optix_integrator_shade_surface_raytrace";
/* Kernels with OSL support are built without SVM, so can skip those direct callables there. */
if (!use_osl) {
group_descs[PG_CALL_SVM_AO].kind = OPTIX_PROGRAM_GROUP_KIND_CALLABLES;
group_descs[PG_CALL_SVM_AO].callables.moduleDC = optix_module;
group_descs[PG_CALL_SVM_AO].callables.entryFunctionNameDC = "__direct_callable__svm_node_ao";
group_descs[PG_CALL_SVM_BEVEL].kind = OPTIX_PROGRAM_GROUP_KIND_CALLABLES;
group_descs[PG_CALL_SVM_BEVEL].callables.moduleDC = optix_module;
group_descs[PG_CALL_SVM_BEVEL].callables.entryFunctionNameDC =
"__direct_callable__svm_node_bevel";
}
}
if (kernel_features & KERNEL_FEATURE_MNEE) {
group_descs[PG_RGEN_SHADE_SURFACE_MNEE].kind = OPTIX_PROGRAM_GROUP_KIND_RAYGEN;
group_descs[PG_RGEN_SHADE_SURFACE_MNEE].raygen.module = optix_module;
group_descs[PG_RGEN_SHADE_SURFACE_MNEE].raygen.entryFunctionName =
"__raygen__kernel_optix_integrator_shade_surface_mnee";
}
/* OSL uses direct callables to execute, so shading needs to be done in OptiX if OSL is used. */
if (use_osl) {
group_descs[PG_RGEN_SHADE_BACKGROUND].kind = OPTIX_PROGRAM_GROUP_KIND_RAYGEN;
group_descs[PG_RGEN_SHADE_BACKGROUND].raygen.module = optix_module;
group_descs[PG_RGEN_SHADE_BACKGROUND].raygen.entryFunctionName =
"__raygen__kernel_optix_integrator_shade_background";
group_descs[PG_RGEN_SHADE_LIGHT].kind = OPTIX_PROGRAM_GROUP_KIND_RAYGEN;
group_descs[PG_RGEN_SHADE_LIGHT].raygen.module = optix_module;
group_descs[PG_RGEN_SHADE_LIGHT].raygen.entryFunctionName =
"__raygen__kernel_optix_integrator_shade_light";
group_descs[PG_RGEN_SHADE_SURFACE].kind = OPTIX_PROGRAM_GROUP_KIND_RAYGEN;
group_descs[PG_RGEN_SHADE_SURFACE].raygen.module = optix_module;
group_descs[PG_RGEN_SHADE_SURFACE].raygen.entryFunctionName =
"__raygen__kernel_optix_integrator_shade_surface";
group_descs[PG_RGEN_SHADE_VOLUME].kind = OPTIX_PROGRAM_GROUP_KIND_RAYGEN;
group_descs[PG_RGEN_SHADE_VOLUME].raygen.module = optix_module;
group_descs[PG_RGEN_SHADE_VOLUME].raygen.entryFunctionName =
"__raygen__kernel_optix_integrator_shade_volume";
group_descs[PG_RGEN_SHADE_SHADOW].kind = OPTIX_PROGRAM_GROUP_KIND_RAYGEN;
group_descs[PG_RGEN_SHADE_SHADOW].raygen.module = optix_module;
group_descs[PG_RGEN_SHADE_SHADOW].raygen.entryFunctionName =
"__raygen__kernel_optix_integrator_shade_shadow";
group_descs[PG_RGEN_SHADE_DEDICATED_LIGHT].kind = OPTIX_PROGRAM_GROUP_KIND_RAYGEN;
group_descs[PG_RGEN_SHADE_DEDICATED_LIGHT].raygen.module = optix_module;
group_descs[PG_RGEN_SHADE_DEDICATED_LIGHT].raygen.entryFunctionName =
"__raygen__kernel_optix_integrator_shade_dedicated_light";
group_descs[PG_RGEN_EVAL_DISPLACE].kind = OPTIX_PROGRAM_GROUP_KIND_RAYGEN;
group_descs[PG_RGEN_EVAL_DISPLACE].raygen.module = optix_module;
group_descs[PG_RGEN_EVAL_DISPLACE].raygen.entryFunctionName =
"__raygen__kernel_optix_shader_eval_displace";
group_descs[PG_RGEN_EVAL_BACKGROUND].kind = OPTIX_PROGRAM_GROUP_KIND_RAYGEN;
group_descs[PG_RGEN_EVAL_BACKGROUND].raygen.module = optix_module;
group_descs[PG_RGEN_EVAL_BACKGROUND].raygen.entryFunctionName =
"__raygen__kernel_optix_shader_eval_background";
group_descs[PG_RGEN_EVAL_CURVE_SHADOW_TRANSPARENCY].kind = OPTIX_PROGRAM_GROUP_KIND_RAYGEN;
group_descs[PG_RGEN_EVAL_CURVE_SHADOW_TRANSPARENCY].raygen.module = optix_module;
group_descs[PG_RGEN_EVAL_CURVE_SHADOW_TRANSPARENCY].raygen.entryFunctionName =
"__raygen__kernel_optix_shader_eval_curve_shadow_transparency";
}
optix_assert(optixProgramGroupCreate(
context, group_descs, NUM_PROGRAM_GROUPS, &group_options, nullptr, nullptr, groups));
/* Get program stack sizes. */
OptixStackSizes stack_size[NUM_PROGRAM_GROUPS] = {};
/* Set up SBT, which in this case is used only to select between different programs. */
sbt_data.alloc(NUM_PROGRAM_GROUPS);
memset(sbt_data.host_pointer, 0, sizeof(SbtRecord) * NUM_PROGRAM_GROUPS);
for (int i = 0; i < NUM_PROGRAM_GROUPS; ++i) {
optix_assert(optixSbtRecordPackHeader(groups[i], &sbt_data[i]));
# if OPTIX_ABI_VERSION >= 84
optix_assert(optixProgramGroupGetStackSize(groups[i], &stack_size[i], nullptr));
# else
optix_assert(optixProgramGroupGetStackSize(groups[i], &stack_size[i]));
# endif
}
sbt_data.copy_to_device(); /* Upload SBT to device. */
/* Calculate maximum trace continuation stack size. */
unsigned int trace_css = stack_size[PG_HITD].cssCH;
/* This is based on the maximum of closest-hit and any-hit/intersection programs. */
trace_css = std::max(trace_css, stack_size[PG_HITD].cssIS + stack_size[PG_HITD].cssAH);
trace_css = std::max(trace_css, stack_size[PG_HITS].cssIS + stack_size[PG_HITS].cssAH);
trace_css = std::max(trace_css, stack_size[PG_HITL].cssIS + stack_size[PG_HITL].cssAH);
trace_css = std::max(trace_css, stack_size[PG_HITV].cssIS + stack_size[PG_HITV].cssAH);
trace_css = std::max(trace_css,
stack_size[PG_HITD_MOTION].cssIS + stack_size[PG_HITD_MOTION].cssAH);
trace_css = std::max(trace_css,
stack_size[PG_HITS_MOTION].cssIS + stack_size[PG_HITS_MOTION].cssAH);
trace_css = std::max(
trace_css, stack_size[PG_HITD_POINTCLOUD].cssIS + stack_size[PG_HITD_POINTCLOUD].cssAH);
trace_css = std::max(
trace_css, stack_size[PG_HITS_POINTCLOUD].cssIS + stack_size[PG_HITS_POINTCLOUD].cssAH);
OptixPipelineLinkOptions link_options = {};
link_options.maxTraceDepth = 1;
# if OPTIX_ABI_VERSION < 84
link_options.debugLevel = module_options.debugLevel;
# endif
if (use_osl) {
/* Re-create OSL pipeline in case kernels are reloaded after it has been created before. */
load_osl_kernels();
}
else if (kernel_features & (KERNEL_FEATURE_NODE_RAYTRACE | KERNEL_FEATURE_MNEE)) {
/* Create shader ray-tracing and MNEE pipeline. */
vector<OptixProgramGroup> pipeline_groups;
pipeline_groups.reserve(NUM_PROGRAM_GROUPS);
if (kernel_features & KERNEL_FEATURE_NODE_RAYTRACE) {
pipeline_groups.push_back(groups[PG_RGEN_SHADE_SURFACE_RAYTRACE]);
pipeline_groups.push_back(groups[PG_CALL_SVM_AO]);
pipeline_groups.push_back(groups[PG_CALL_SVM_BEVEL]);
}
if (kernel_features & KERNEL_FEATURE_MNEE) {
pipeline_groups.push_back(groups[PG_RGEN_SHADE_SURFACE_MNEE]);
}
pipeline_groups.push_back(groups[PG_MISS]);
pipeline_groups.push_back(groups[PG_HITD]);
pipeline_groups.push_back(groups[PG_HITS]);
pipeline_groups.push_back(groups[PG_HITL]);
pipeline_groups.push_back(groups[PG_HITV]);
if (pipeline_options.usesMotionBlur) {
pipeline_groups.push_back(groups[PG_HITD_MOTION]);
pipeline_groups.push_back(groups[PG_HITS_MOTION]);
}
if (kernel_features & KERNEL_FEATURE_POINTCLOUD) {
pipeline_groups.push_back(groups[PG_HITD_POINTCLOUD]);
pipeline_groups.push_back(groups[PG_HITS_POINTCLOUD]);
}
optix_assert(optixPipelineCreate(context,
&pipeline_options,
&link_options,
pipeline_groups.data(),
pipeline_groups.size(),
nullptr,
nullptr,
&pipelines[PIP_SHADE]));
/* Combine ray generation and trace continuation stack size. */
const unsigned int css = std::max(stack_size[PG_RGEN_SHADE_SURFACE_RAYTRACE].cssRG,
stack_size[PG_RGEN_SHADE_SURFACE_MNEE].cssRG) +
link_options.maxTraceDepth * trace_css;
const unsigned int dss = std::max(stack_size[PG_CALL_SVM_AO].dssDC,
stack_size[PG_CALL_SVM_BEVEL].dssDC);
/* Set stack size depending on pipeline options. */
optix_assert(optixPipelineSetStackSize(
pipelines[PIP_SHADE], 0, dss, css, pipeline_options.usesMotionBlur ? 3 : 2));
}
{ /* Create intersection-only pipeline. */
vector<OptixProgramGroup> pipeline_groups;
pipeline_groups.reserve(NUM_PROGRAM_GROUPS);
pipeline_groups.push_back(groups[PG_RGEN_INTERSECT_CLOSEST]);
pipeline_groups.push_back(groups[PG_RGEN_INTERSECT_SHADOW]);
pipeline_groups.push_back(groups[PG_RGEN_INTERSECT_SUBSURFACE]);
pipeline_groups.push_back(groups[PG_RGEN_INTERSECT_VOLUME_STACK]);
pipeline_groups.push_back(groups[PG_RGEN_INTERSECT_DEDICATED_LIGHT]);
pipeline_groups.push_back(groups[PG_MISS]);
pipeline_groups.push_back(groups[PG_HITD]);
pipeline_groups.push_back(groups[PG_HITS]);
pipeline_groups.push_back(groups[PG_HITL]);
pipeline_groups.push_back(groups[PG_HITV]);
if (pipeline_options.usesMotionBlur) {
pipeline_groups.push_back(groups[PG_HITD_MOTION]);
pipeline_groups.push_back(groups[PG_HITS_MOTION]);
}
if (kernel_features & KERNEL_FEATURE_POINTCLOUD) {
pipeline_groups.push_back(groups[PG_HITD_POINTCLOUD]);
pipeline_groups.push_back(groups[PG_HITS_POINTCLOUD]);
}
optix_assert(optixPipelineCreate(context,
&pipeline_options,
&link_options,
pipeline_groups.data(),
pipeline_groups.size(),
nullptr,
nullptr,
&pipelines[PIP_INTERSECT]));
/* Calculate continuation stack size based on the maximum of all ray generation stack sizes. */
const unsigned int css =
std::max(stack_size[PG_RGEN_INTERSECT_CLOSEST].cssRG,
std::max(stack_size[PG_RGEN_INTERSECT_SHADOW].cssRG,
std::max(stack_size[PG_RGEN_INTERSECT_SUBSURFACE].cssRG,
stack_size[PG_RGEN_INTERSECT_VOLUME_STACK].cssRG))) +
link_options.maxTraceDepth * trace_css;
optix_assert(optixPipelineSetStackSize(
pipelines[PIP_INTERSECT], 0, 0, css, pipeline_options.usesMotionBlur ? 3 : 2));
}
return !have_error();
}
bool OptiXDevice::load_osl_kernels()
{
# ifdef WITH_OSL
if (have_error()) {
return false;
}
struct OSLKernel {
string ptx;
string fused_entry;
};
/* This has to be in the same order as the ShaderType enum, so that the index calculation in
* osl_eval_nodes checks out */
vector<OSLKernel> osl_kernels;
for (ShaderType type = SHADER_TYPE_SURFACE; type <= SHADER_TYPE_BUMP;
type = static_cast<ShaderType>(type + 1))
{
const vector<OSL::ShaderGroupRef> &groups = (type == SHADER_TYPE_SURFACE ?
osl_globals.surface_state :
type == SHADER_TYPE_VOLUME ?
osl_globals.volume_state :
type == SHADER_TYPE_DISPLACEMENT ?
osl_globals.displacement_state :
osl_globals.bump_state);
for (const OSL::ShaderGroupRef &group : groups) {
if (group) {
string osl_ptx, fused_name;
osl_globals.ss->getattribute(group.get(), "group_fused_name", fused_name);
osl_globals.ss->getattribute(
group.get(), "ptx_compiled_version", OSL::TypeDesc::PTR, &osl_ptx);
int groupdata_size = 0;
osl_globals.ss->getattribute(group.get(), "llvm_groupdata_size", groupdata_size);
if (groupdata_size == 0) {
// Old attribute name from our patched OSL version as fallback.
osl_globals.ss->getattribute(group.get(), "groupdata_size", groupdata_size);
}
if (groupdata_size > 2048) { /* See 'group_data' array in kernel/osl/osl.h */
set_error(
string_printf("Requested OSL group data size (%d) is greater than the maximum "
"supported with OptiX (2048)",
groupdata_size));
return false;
}
osl_kernels.push_back({std::move(osl_ptx), std::move(fused_name)});
}
else {
/* Add empty entry for non-existent shader groups, so that the index stays stable. */
osl_kernels.emplace_back();
}
}
}
const CUDAContextScope scope(this);
if (pipelines[PIP_SHADE]) {
optixPipelineDestroy(pipelines[PIP_SHADE]);
}
for (OptixModule &module : osl_modules) {
if (module != nullptr) {
optixModuleDestroy(module);
module = nullptr;
}
}
for (OptixProgramGroup &group : osl_groups) {
if (group != nullptr) {
optixProgramGroupDestroy(group);
group = nullptr;
}
}
if (osl_kernels.empty()) {
/* No OSL shader groups, so no need to create a pipeline. */
return true;
}
OptixProgramGroupOptions group_options = {}; /* There are no options currently. */
OptixModuleCompileOptions module_options = {};
module_options.optLevel = OPTIX_COMPILE_OPTIMIZATION_LEVEL_3;
module_options.debugLevel = OPTIX_COMPILE_DEBUG_LEVEL_NONE;
osl_groups.resize(osl_kernels.size() + 1);
osl_modules.resize(osl_kernels.size() + 1);
{ /* Load and compile PTX module with OSL services. */
string ptx_data, ptx_filename = path_get("lib/kernel_optix_osl_services.ptx.zst");
if (!path_read_compressed_text(ptx_filename, ptx_data)) {
set_error(string_printf("Failed to load OptiX OSL services kernel from '%s'",
ptx_filename.c_str()));
return false;
}
# if OPTIX_ABI_VERSION >= 84
const OptixResult result = optixModuleCreate(context,
&module_options,
&pipeline_options,
ptx_data.data(),
ptx_data.size(),
nullptr,
nullptr,
,
&osl_modules.back());
# else
const OptixResult result = optixModuleCreateFromPTX(context,
&module_options,
&pipeline_options,
ptx_data.data(),
ptx_data.size(),
nullptr,
nullptr,
&osl_modules.back());
# endif
if (result != OPTIX_SUCCESS) {
set_error(string_printf("Failed to load OptiX OSL services kernel from '%s' (%s)",
ptx_filename.c_str(),
optixGetErrorName(result)));
return false;
}
OptixProgramGroupDesc group_desc = {};
group_desc.kind = OPTIX_PROGRAM_GROUP_KIND_CALLABLES;
group_desc.callables.entryFunctionNameDC = "__direct_callable__dummy_services";
group_desc.callables.moduleDC = osl_modules.back();
optix_assert(optixProgramGroupCreate(
context, &group_desc, 1, &group_options, nullptr, nullptr, &osl_groups.back()));
}
TaskPool pool;
vector<OptixResult> results(osl_kernels.size(), OPTIX_SUCCESS);
for (size_t i = 0; i < osl_kernels.size(); ++i) {
if (osl_kernels[i].ptx.empty()) {
continue;
}
# if OPTIX_ABI_VERSION >= 84
OptixTask task = nullptr;
results[i] = optixModuleCreateWithTasks(context,
&module_options,
&pipeline_options,
osl_kernels[i].ptx.data(),
osl_kernels[i].ptx.size(),
nullptr,
nullptr,
&osl_modules[i],
&task);
if (results[i] == OPTIX_SUCCESS) {
execute_optix_task(pool, task, results[i]);
}
# elif OPTIX_ABI_VERSION >= 55
OptixTask task = nullptr;
results[i] = optixModuleCreateFromPTXWithTasks(context,
&module_options,
&pipeline_options,
osl_kernels[i].ptx.data(),
osl_kernels[i].ptx.size(),
nullptr,
nullptr,
&osl_modules[i],
&task);
if (results[i] == OPTIX_SUCCESS) {
execute_optix_task(pool, task, results[i]);
}
# else
pool.push([this, &results, i, &module_options, &osl_kernels]() {
results[i] = optixModuleCreateFromPTX(context,
&module_options,
&pipeline_options,
osl_kernels[i].ptx.data(),
osl_kernels[i].ptx.size(),
nullptr,
nullptr,
&osl_modules[i]);
});
# endif
}
pool.wait_work();
for (size_t i = 0; i < osl_kernels.size(); ++i) {
if (osl_kernels[i].ptx.empty()) {
continue;
}
if (results[i] != OPTIX_SUCCESS) {
set_error(string_printf("Failed to load OptiX OSL kernel for %s (%s)",
osl_kernels[i].fused_entry.c_str(),
optixGetErrorName(results[i])));
return false;
}
OptixProgramGroupDesc group_desc = {};
group_desc.kind = OPTIX_PROGRAM_GROUP_KIND_CALLABLES;
group_desc.callables.entryFunctionNameDC = osl_kernels[i].fused_entry.c_str();
group_desc.callables.moduleDC = osl_modules[i];
optix_assert(optixProgramGroupCreate(
context, &group_desc, 1, &group_options, nullptr, nullptr, &osl_groups[i]));
}
/* Update SBT with new entries. */
sbt_data.alloc(NUM_PROGRAM_GROUPS + osl_groups.size());
for (int i = 0; i < NUM_PROGRAM_GROUPS; ++i) {
optix_assert(optixSbtRecordPackHeader(groups[i], &sbt_data[i]));
}
for (size_t i = 0; i < osl_groups.size(); ++i) {
if (osl_groups[i] != nullptr) {
optix_assert(optixSbtRecordPackHeader(osl_groups[i], &sbt_data[NUM_PROGRAM_GROUPS + i]));
}
else {
/* Default to "__direct_callable__dummy_services", so that OSL evaluation for empty
* materials has direct callables to call and does not crash. */
optix_assert(optixSbtRecordPackHeader(osl_groups.back(), &sbt_data[NUM_PROGRAM_GROUPS + i]));
}
}
sbt_data.copy_to_device(); /* Upload updated SBT to device. */
OptixPipelineLinkOptions link_options = {};
link_options.maxTraceDepth = 0;
# if OPTIX_ABI_VERSION < 84
link_options.debugLevel = OPTIX_COMPILE_DEBUG_LEVEL_NONE;
# endif
{
vector<OptixProgramGroup> pipeline_groups;
pipeline_groups.reserve(NUM_PROGRAM_GROUPS);
pipeline_groups.push_back(groups[PG_RGEN_SHADE_BACKGROUND]);
pipeline_groups.push_back(groups[PG_RGEN_SHADE_LIGHT]);
pipeline_groups.push_back(groups[PG_RGEN_SHADE_SURFACE]);
pipeline_groups.push_back(groups[PG_RGEN_SHADE_SURFACE_RAYTRACE]);
pipeline_groups.push_back(groups[PG_RGEN_SHADE_SURFACE_MNEE]);
pipeline_groups.push_back(groups[PG_RGEN_SHADE_VOLUME]);
pipeline_groups.push_back(groups[PG_RGEN_SHADE_SHADOW]);
pipeline_groups.push_back(groups[PG_RGEN_SHADE_DEDICATED_LIGHT]);
pipeline_groups.push_back(groups[PG_RGEN_EVAL_DISPLACE]);
pipeline_groups.push_back(groups[PG_RGEN_EVAL_BACKGROUND]);
pipeline_groups.push_back(groups[PG_RGEN_EVAL_CURVE_SHADOW_TRANSPARENCY]);
for (const OptixProgramGroup &group : osl_groups) {
if (group != nullptr) {
pipeline_groups.push_back(group);
}
}
optix_assert(optixPipelineCreate(context,
&pipeline_options,
&link_options,
pipeline_groups.data(),
pipeline_groups.size(),
nullptr,
nullptr,
&pipelines[PIP_SHADE]));
/* Get program stack sizes. */
OptixStackSizes stack_size[NUM_PROGRAM_GROUPS] = {};
vector<OptixStackSizes> osl_stack_size(osl_groups.size());
for (int i = 0; i < NUM_PROGRAM_GROUPS; ++i) {
# if OPTIX_ABI_VERSION >= 84
optix_assert(optixProgramGroupGetStackSize(groups[i], &stack_size[i], nullptr));
# else
optix_assert(optixProgramGroupGetStackSize(groups[i], &stack_size[i]));
# endif
}
for (size_t i = 0; i < osl_groups.size(); ++i) {
if (osl_groups[i] != nullptr) {
# if OPTIX_ABI_VERSION >= 84
optix_assert(optixProgramGroupGetStackSize(
osl_groups[i], &osl_stack_size[i], pipelines[PIP_SHADE]));
# else
optix_assert(optixProgramGroupGetStackSize(osl_groups[i], &osl_stack_size[i]));
# endif
}
}
const unsigned int css = std::max(stack_size[PG_RGEN_SHADE_SURFACE_RAYTRACE].cssRG,
stack_size[PG_RGEN_SHADE_SURFACE_MNEE].cssRG);
unsigned int dss = 0;
for (unsigned int i = 0; i < osl_stack_size.size(); ++i) {
dss = std::max(dss, osl_stack_size[i].dssDC);
}
optix_assert(optixPipelineSetStackSize(
pipelines[PIP_SHADE], 0, dss, css, pipeline_options.usesMotionBlur ? 3 : 2));
}
return !have_error();
# else
return false;
# endif
}
OSLGlobals *OptiXDevice::get_cpu_osl_memory()
{
# ifdef WITH_OSL
return &osl_globals;
# else
return nullptr;
# endif
}
bool OptiXDevice::build_optix_bvh(BVHOptiX *bvh,
OptixBuildOperation operation,
const OptixBuildInput &build_input,
const uint16_t num_motion_steps)
{
/* Allocate and build acceleration structures only one at a time, to prevent parallel builds
* from running out of memory (since both original and compacted acceleration structure memory
* may be allocated at the same time for the duration of this function). The builds would
* otherwise happen on the same CUDA stream anyway. */
static thread_mutex mutex;
thread_scoped_lock lock(mutex);
const CUDAContextScope scope(this);
bool use_fast_trace_bvh = (bvh->params.bvh_type == BVH_TYPE_STATIC);
/* Compute memory usage. */
OptixAccelBufferSizes sizes = {};
OptixAccelBuildOptions options = {};
options.operation = operation;
if (build_input.type == OPTIX_BUILD_INPUT_TYPE_CURVES) {
/* The build flags have to match the ones used to query the built-in curve intersection
* program (see optixBuiltinISModuleGet above) */
options.buildFlags = OPTIX_BUILD_FLAG_PREFER_FAST_TRACE | OPTIX_BUILD_FLAG_ALLOW_COMPACTION |
OPTIX_BUILD_FLAG_ALLOW_UPDATE;
use_fast_trace_bvh = true;
}
else if (use_fast_trace_bvh) {
VLOG_INFO << "Using fast to trace OptiX BVH";
options.buildFlags = OPTIX_BUILD_FLAG_PREFER_FAST_TRACE | OPTIX_BUILD_FLAG_ALLOW_COMPACTION;
}
else {
VLOG_INFO << "Using fast to update OptiX BVH";
options.buildFlags = OPTIX_BUILD_FLAG_PREFER_FAST_BUILD | OPTIX_BUILD_FLAG_ALLOW_UPDATE;
}
options.motionOptions.numKeys = num_motion_steps;
options.motionOptions.flags = OPTIX_MOTION_FLAG_START_VANISH | OPTIX_MOTION_FLAG_END_VANISH;
options.motionOptions.timeBegin = 0.0f;
options.motionOptions.timeEnd = 1.0f;
optix_assert(optixAccelComputeMemoryUsage(context, &options, &build_input, 1, &sizes));
/* Allocate required output buffers. */
device_only_memory<char> temp_mem(this, "optix temp as build mem", true);
temp_mem.alloc_to_device(align_up(sizes.tempSizeInBytes, 8) + 8);
if (!temp_mem.device_pointer) {
/* Make sure temporary memory allocation succeeded. */
return false;
}
/* Acceleration structure memory has to be allocated on the device (not allowed on the host). */
device_only_memory<char> &out_data = *bvh->as_data;
if (operation == OPTIX_BUILD_OPERATION_BUILD) {
assert(out_data.device == this);
out_data.alloc_to_device(sizes.outputSizeInBytes);
if (!out_data.device_pointer) {
return false;
}
}
else {
assert(out_data.device_pointer && out_data.device_size >= sizes.outputSizeInBytes);
}
/* Finally build the acceleration structure. */
OptixAccelEmitDesc compacted_size_prop = {};
compacted_size_prop.type = OPTIX_PROPERTY_TYPE_COMPACTED_SIZE;
/* A tiny space was allocated for this property at the end of the temporary buffer above.
* Make sure this pointer is 8-byte aligned. */
compacted_size_prop.result = align_up(temp_mem.device_pointer + sizes.tempSizeInBytes, 8);
OptixTraversableHandle out_handle = 0;
optix_assert(optixAccelBuild(context,
nullptr,
&options,
&build_input,
1,
temp_mem.device_pointer,
sizes.tempSizeInBytes,
out_data.device_pointer,
sizes.outputSizeInBytes,
&out_handle,
use_fast_trace_bvh ? &compacted_size_prop : nullptr,
use_fast_trace_bvh ? 1 : 0));
bvh->traversable_handle = static_cast<uint64_t>(out_handle);
/* Wait for all operations to finish. */
cuda_assert(cuStreamSynchronize(nullptr));
/* Compact acceleration structure to save memory (do not do this in viewport for faster builds).
*/
if (use_fast_trace_bvh) {
uint64_t compacted_size = sizes.outputSizeInBytes;
cuda_assert(cuMemcpyDtoH(&compacted_size, compacted_size_prop.result, sizeof(compacted_size)));
/* Temporary memory is no longer needed, so free it now to make space. */
temp_mem.free();
/* There is no point compacting if the size does not change. */
if (compacted_size < sizes.outputSizeInBytes) {
device_only_memory<char> compacted_data(this, "optix compacted as", false);
compacted_data.alloc_to_device(compacted_size);
if (!compacted_data.device_pointer) {
/* Do not compact if memory allocation for compacted acceleration structure fails.
* Can just use the uncompacted one then, so succeed here regardless. */
return !have_error();
}
optix_assert(optixAccelCompact(context,
nullptr,
out_handle,
compacted_data.device_pointer,
compacted_size,
&out_handle));
bvh->traversable_handle = static_cast<uint64_t>(out_handle);
/* Wait for compaction to finish. */
cuda_assert(cuStreamSynchronize(nullptr));
std::swap(out_data.device_size, compacted_data.device_size);
std::swap(out_data.device_pointer, compacted_data.device_pointer);
/* Original acceleration structure memory is freed when 'compacted_data' goes out of scope.
*/
}
}
return !have_error();
}
void OptiXDevice::build_bvh(BVH *bvh, Progress &progress, bool refit)
{
const bool use_fast_trace_bvh = (bvh->params.bvh_type == BVH_TYPE_STATIC);
free_bvh_memory_delayed();
BVHOptiX *const bvh_optix = static_cast<BVHOptiX *>(bvh);
progress.set_substatus("Building OptiX acceleration structure");
if (!bvh->params.top_level) {
assert(bvh->objects.size() == 1 && bvh->geometry.size() == 1);
/* Refit is only possible in viewport for now (because AS is built with
* OPTIX_BUILD_FLAG_ALLOW_UPDATE only there, see above). */
OptixBuildOperation operation = OPTIX_BUILD_OPERATION_BUILD;
if (refit && !use_fast_trace_bvh) {
assert(bvh_optix->traversable_handle != 0);
operation = OPTIX_BUILD_OPERATION_UPDATE;
}
else {
bvh_optix->as_data->free();
bvh_optix->traversable_handle = 0;
}
/* Build bottom level acceleration structures (BLAS). */
Geometry *const geom = bvh->geometry[0];
if (geom->is_hair()) {
/* Build BLAS for curve primitives. */
Hair *const hair = static_cast<Hair *const>(geom);
if (hair->num_segments() == 0) {
return;
}
const size_t num_segments = hair->num_segments();
size_t num_motion_steps = 1;
Attribute *motion_keys = hair->attributes.find(ATTR_STD_MOTION_VERTEX_POSITION);
if (pipeline_options.usesMotionBlur && hair->get_use_motion_blur() && motion_keys) {
num_motion_steps = hair->get_motion_steps();
}
device_vector<OptixAabb> aabb_data(this, "optix temp aabb data", MEM_READ_ONLY);
device_vector<int> index_data(this, "optix temp index data", MEM_READ_ONLY);
device_vector<float4> vertex_data(this, "optix temp vertex data", MEM_READ_ONLY);
/* Four control points for each curve segment. */
size_t num_vertices = num_segments * 4;
if (hair->curve_shape == CURVE_THICK) {
# if OPTIX_ABI_VERSION >= 55
num_vertices = hair->num_keys() + 2 * hair->num_curves();
# endif
index_data.alloc(num_segments);
vertex_data.alloc(num_vertices * num_motion_steps);
}
else {
aabb_data.alloc(num_segments * num_motion_steps);
}
/* Get AABBs for each motion step. */
for (size_t step = 0; step < num_motion_steps; ++step) {
/* The center step for motion vertices is not stored in the attribute. */
const float3 *keys = hair->get_curve_keys().data();
size_t center_step = (num_motion_steps - 1) / 2;
if (step != center_step) {
size_t attr_offset = (step > center_step) ? step - 1 : step;
/* Technically this is a float4 array, but sizeof(float3) == sizeof(float4). */
keys = motion_keys->data_float3() + attr_offset * hair->get_curve_keys().size();
}
# if OPTIX_ABI_VERSION >= 55
if (hair->curve_shape == CURVE_THICK) {
for (size_t curve_index = 0, segment_index = 0, vertex_index = step * num_vertices;
curve_index < hair->num_curves();
++curve_index)
{
const Hair::Curve curve = hair->get_curve(curve_index);
const array<float> &curve_radius = hair->get_curve_radius();
const int first_key_index = curve.first_key;
{
vertex_data[vertex_index++] = make_float4(keys[first_key_index].x,
keys[first_key_index].y,
keys[first_key_index].z,
curve_radius[first_key_index]);
}
for (int k = 0; k < curve.num_segments(); ++k) {
if (step == 0) {
index_data[segment_index++] = vertex_index - 1;
}
vertex_data[vertex_index++] = make_float4(keys[first_key_index + k].x,
keys[first_key_index + k].y,
keys[first_key_index + k].z,
curve_radius[first_key_index + k]);
}
const int last_key_index = first_key_index + curve.num_keys - 1;
{
vertex_data[vertex_index++] = make_float4(keys[last_key_index].x,
keys[last_key_index].y,
keys[last_key_index].z,
curve_radius[last_key_index]);
vertex_data[vertex_index++] = make_float4(keys[last_key_index].x,
keys[last_key_index].y,
keys[last_key_index].z,
curve_radius[last_key_index]);
}
}
}
else
# endif
{
for (size_t curve_index = 0, i = 0; curve_index < hair->num_curves(); ++curve_index) {
const Hair::Curve curve = hair->get_curve(curve_index);
for (int segment = 0; segment < curve.num_segments(); ++segment, ++i) {
# if OPTIX_ABI_VERSION < 55
if (hair->curve_shape == CURVE_THICK) {
const array<float> &curve_radius = hair->get_curve_radius();
int k0 = curve.first_key + segment;
int k1 = k0 + 1;
int ka = max(k0 - 1, curve.first_key);
int kb = min(k1 + 1, curve.first_key + curve.num_keys - 1);
index_data[i] = i * 4;
float4 *const v = vertex_data.data() + step * num_vertices + index_data[i];
const float4 px = make_float4(keys[ka].x, keys[k0].x, keys[k1].x, keys[kb].x);
const float4 py = make_float4(keys[ka].y, keys[k0].y, keys[k1].y, keys[kb].y);
const float4 pz = make_float4(keys[ka].z, keys[k0].z, keys[k1].z, keys[kb].z);
const float4 pw = make_float4(
curve_radius[ka], curve_radius[k0], curve_radius[k1], curve_radius[kb]);
/* Convert Catmull-Rom data to B-spline. */
static const float4 cr2bsp0 = make_float4(+7, -4, +5, -2) / 6.f;
static const float4 cr2bsp1 = make_float4(-2, 11, -4, +1) / 6.f;
static const float4 cr2bsp2 = make_float4(+1, -4, 11, -2) / 6.f;
static const float4 cr2bsp3 = make_float4(-2, +5, -4, +7) / 6.f;
v[0] = make_float4(
dot(cr2bsp0, px), dot(cr2bsp0, py), dot(cr2bsp0, pz), dot(cr2bsp0, pw));
v[1] = make_float4(
dot(cr2bsp1, px), dot(cr2bsp1, py), dot(cr2bsp1, pz), dot(cr2bsp1, pw));
v[2] = make_float4(
dot(cr2bsp2, px), dot(cr2bsp2, py), dot(cr2bsp2, pz), dot(cr2bsp2, pw));
v[3] = make_float4(
dot(cr2bsp3, px), dot(cr2bsp3, py), dot(cr2bsp3, pz), dot(cr2bsp3, pw));
}
else
# endif
{
BoundBox bounds = BoundBox::empty;
curve.bounds_grow(segment, keys, hair->get_curve_radius().data(), bounds);
const size_t index = step * num_segments + i;
aabb_data[index].minX = bounds.min.x;
aabb_data[index].minY = bounds.min.y;
aabb_data[index].minZ = bounds.min.z;
aabb_data[index].maxX = bounds.max.x;
aabb_data[index].maxY = bounds.max.y;
aabb_data[index].maxZ = bounds.max.z;
}
}
}
}
}
/* Upload AABB data to GPU. */
aabb_data.copy_to_device();
index_data.copy_to_device();
vertex_data.copy_to_device();
vector<device_ptr> aabb_ptrs;
aabb_ptrs.reserve(num_motion_steps);
vector<device_ptr> width_ptrs;
vector<device_ptr> vertex_ptrs;
width_ptrs.reserve(num_motion_steps);
vertex_ptrs.reserve(num_motion_steps);
for (size_t step = 0; step < num_motion_steps; ++step) {
aabb_ptrs.push_back(aabb_data.device_pointer + step * num_segments * sizeof(OptixAabb));
const device_ptr base_ptr = vertex_data.device_pointer +
step * num_vertices * sizeof(float4);
width_ptrs.push_back(base_ptr + 3 * sizeof(float)); /* Offset by vertex size. */
vertex_ptrs.push_back(base_ptr);
}
/* Force a single any-hit call, so shadow record-all behavior works correctly. */
unsigned int build_flags = OPTIX_GEOMETRY_FLAG_REQUIRE_SINGLE_ANYHIT_CALL;
OptixBuildInput build_input = {};
if (hair->curve_shape == CURVE_THICK) {
build_input.type = OPTIX_BUILD_INPUT_TYPE_CURVES;
# if OPTIX_ABI_VERSION >= 55
build_input.curveArray.curveType = OPTIX_PRIMITIVE_TYPE_ROUND_CATMULLROM;
# else
build_input.curveArray.curveType = OPTIX_PRIMITIVE_TYPE_ROUND_CUBIC_BSPLINE;
# endif
build_input.curveArray.numPrimitives = num_segments;
build_input.curveArray.vertexBuffers = (CUdeviceptr *)vertex_ptrs.data();
build_input.curveArray.numVertices = num_vertices;
build_input.curveArray.vertexStrideInBytes = sizeof(float4);
build_input.curveArray.widthBuffers = (CUdeviceptr *)width_ptrs.data();
build_input.curveArray.widthStrideInBytes = sizeof(float4);
build_input.curveArray.indexBuffer = (CUdeviceptr)index_data.device_pointer;
build_input.curveArray.indexStrideInBytes = sizeof(int);
build_input.curveArray.flag = build_flags;
build_input.curveArray.primitiveIndexOffset = hair->curve_segment_offset;
}
else {
/* Disable visibility test any-hit program, since it is already checked during
* intersection. Those trace calls that require any-hit can force it with a ray flag. */
build_flags |= OPTIX_GEOMETRY_FLAG_DISABLE_ANYHIT;
build_input.type = OPTIX_BUILD_INPUT_TYPE_CUSTOM_PRIMITIVES;
build_input.customPrimitiveArray.aabbBuffers = (CUdeviceptr *)aabb_ptrs.data();
build_input.customPrimitiveArray.numPrimitives = num_segments;
build_input.customPrimitiveArray.strideInBytes = sizeof(OptixAabb);
build_input.customPrimitiveArray.flags = &build_flags;
build_input.customPrimitiveArray.numSbtRecords = 1;
build_input.customPrimitiveArray.primitiveIndexOffset = hair->curve_segment_offset;
}
if (!build_optix_bvh(bvh_optix, operation, build_input, num_motion_steps)) {
progress.set_error("Failed to build OptiX acceleration structure");
}
}
else if (geom->is_mesh() || geom->is_volume()) {
/* Build BLAS for triangle primitives. */
Mesh *const mesh = static_cast<Mesh *const>(geom);
if (mesh->num_triangles() == 0) {
return;
}
const size_t num_verts = mesh->get_verts().size();
size_t num_motion_steps = 1;
Attribute *motion_keys = mesh->attributes.find(ATTR_STD_MOTION_VERTEX_POSITION);
if (pipeline_options.usesMotionBlur && mesh->get_use_motion_blur() && motion_keys) {
num_motion_steps = mesh->get_motion_steps();
}
device_vector<int> index_data(this, "optix temp index data", MEM_READ_ONLY);
index_data.alloc(mesh->get_triangles().size());
memcpy(index_data.data(),
mesh->get_triangles().data(),
mesh->get_triangles().size() * sizeof(int));
device_vector<float4> vertex_data(this, "optix temp vertex data", MEM_READ_ONLY);
vertex_data.alloc(num_verts * num_motion_steps);
for (size_t step = 0; step < num_motion_steps; ++step) {
const float3 *verts = mesh->get_verts().data();
size_t center_step = (num_motion_steps - 1) / 2;
/* The center step for motion vertices is not stored in the attribute. */
if (step != center_step) {
verts = motion_keys->data_float3() + (step > center_step ? step - 1 : step) * num_verts;
}
memcpy(vertex_data.data() + num_verts * step, verts, num_verts * sizeof(float3));
}
/* Upload triangle data to GPU. */
index_data.copy_to_device();
vertex_data.copy_to_device();
vector<device_ptr> vertex_ptrs;
vertex_ptrs.reserve(num_motion_steps);
for (size_t step = 0; step < num_motion_steps; ++step) {
vertex_ptrs.push_back(vertex_data.device_pointer + num_verts * step * sizeof(float3));
}
/* Force a single any-hit call, so shadow record-all behavior works correctly. */
unsigned int build_flags = OPTIX_GEOMETRY_FLAG_REQUIRE_SINGLE_ANYHIT_CALL;
OptixBuildInput build_input = {};
build_input.type = OPTIX_BUILD_INPUT_TYPE_TRIANGLES;
build_input.triangleArray.vertexBuffers = (CUdeviceptr *)vertex_ptrs.data();
build_input.triangleArray.numVertices = num_verts;
build_input.triangleArray.vertexFormat = OPTIX_VERTEX_FORMAT_FLOAT3;
build_input.triangleArray.vertexStrideInBytes = sizeof(float4);
build_input.triangleArray.indexBuffer = index_data.device_pointer;
build_input.triangleArray.numIndexTriplets = mesh->num_triangles();
build_input.triangleArray.indexFormat = OPTIX_INDICES_FORMAT_UNSIGNED_INT3;
build_input.triangleArray.indexStrideInBytes = 3 * sizeof(int);
build_input.triangleArray.flags = &build_flags;
/* The SBT does not store per primitive data since Cycles already allocates separate
* buffers for that purpose. OptiX does not allow this to be zero though, so just pass in
* one and rely on that having the same meaning in this case. */
build_input.triangleArray.numSbtRecords = 1;
build_input.triangleArray.primitiveIndexOffset = mesh->prim_offset;
if (!build_optix_bvh(bvh_optix, operation, build_input, num_motion_steps)) {
progress.set_error("Failed to build OptiX acceleration structure");
}
}
else if (geom->is_pointcloud()) {
/* Build BLAS for points primitives. */
PointCloud *const pointcloud = static_cast<PointCloud *const>(geom);
const size_t num_points = pointcloud->num_points();
if (num_points == 0) {
return;
}
size_t num_motion_steps = 1;
Attribute *motion_points = pointcloud->attributes.find(ATTR_STD_MOTION_VERTEX_POSITION);
if (pipeline_options.usesMotionBlur && pointcloud->get_use_motion_blur() && motion_points) {
num_motion_steps = pointcloud->get_motion_steps();
}
device_vector<OptixAabb> aabb_data(this, "optix temp aabb data", MEM_READ_ONLY);
aabb_data.alloc(num_points * num_motion_steps);
/* Get AABBs for each motion step. */
for (size_t step = 0; step < num_motion_steps; ++step) {
/* The center step for motion vertices is not stored in the attribute. */
size_t center_step = (num_motion_steps - 1) / 2;
if (step == center_step) {
const float3 *points = pointcloud->get_points().data();
const float *radius = pointcloud->get_radius().data();
for (size_t i = 0; i < num_points; ++i) {
const PointCloud::Point point = pointcloud->get_point(i);
BoundBox bounds = BoundBox::empty;
point.bounds_grow(points, radius, bounds);
const size_t index = step * num_points + i;
aabb_data[index].minX = bounds.min.x;
aabb_data[index].minY = bounds.min.y;
aabb_data[index].minZ = bounds.min.z;
aabb_data[index].maxX = bounds.max.x;
aabb_data[index].maxY = bounds.max.y;
aabb_data[index].maxZ = bounds.max.z;
}
}
else {
size_t attr_offset = (step > center_step) ? step - 1 : step;
const float4 *points = motion_points->data_float4() + attr_offset * num_points;
for (size_t i = 0; i < num_points; ++i) {
const PointCloud::Point point = pointcloud->get_point(i);
BoundBox bounds = BoundBox::empty;
point.bounds_grow(points[i], bounds);
const size_t index = step * num_points + i;
aabb_data[index].minX = bounds.min.x;
aabb_data[index].minY = bounds.min.y;
aabb_data[index].minZ = bounds.min.z;
aabb_data[index].maxX = bounds.max.x;
aabb_data[index].maxY = bounds.max.y;
aabb_data[index].maxZ = bounds.max.z;
}
}
}
/* Upload AABB data to GPU. */
aabb_data.copy_to_device();
vector<device_ptr> aabb_ptrs;
aabb_ptrs.reserve(num_motion_steps);
for (size_t step = 0; step < num_motion_steps; ++step) {
aabb_ptrs.push_back(aabb_data.device_pointer + step * num_points * sizeof(OptixAabb));
}
/* Disable visibility test any-hit program, since it is already checked during
* intersection. Those trace calls that require anyhit can force it with a ray flag.
* For those, force a single any-hit call, so shadow record-all behavior works correctly. */
unsigned int build_flags = OPTIX_GEOMETRY_FLAG_DISABLE_ANYHIT |
OPTIX_GEOMETRY_FLAG_REQUIRE_SINGLE_ANYHIT_CALL;
OptixBuildInput build_input = {};
build_input.type = OPTIX_BUILD_INPUT_TYPE_CUSTOM_PRIMITIVES;
# if OPTIX_ABI_VERSION < 23
build_input.aabbArray.aabbBuffers = (CUdeviceptr *)aabb_ptrs.data();
build_input.aabbArray.numPrimitives = num_points;
build_input.aabbArray.strideInBytes = sizeof(OptixAabb);
build_input.aabbArray.flags = &build_flags;
build_input.aabbArray.numSbtRecords = 1;
build_input.aabbArray.primitiveIndexOffset = pointcloud->prim_offset;
# else
build_input.customPrimitiveArray.aabbBuffers = (CUdeviceptr *)aabb_ptrs.data();
build_input.customPrimitiveArray.numPrimitives = num_points;
build_input.customPrimitiveArray.strideInBytes = sizeof(OptixAabb);
build_input.customPrimitiveArray.flags = &build_flags;
build_input.customPrimitiveArray.numSbtRecords = 1;
build_input.customPrimitiveArray.primitiveIndexOffset = pointcloud->prim_offset;
# endif
if (!build_optix_bvh(bvh_optix, operation, build_input, num_motion_steps)) {
progress.set_error("Failed to build OptiX acceleration structure");
}
}
}
else {
unsigned int num_instances = 0;
unsigned int max_num_instances = 0xFFFFFFFF;
bvh_optix->as_data->free();
bvh_optix->traversable_handle = 0;
bvh_optix->motion_transform_data->free();
optixDeviceContextGetProperty(context,
OPTIX_DEVICE_PROPERTY_LIMIT_MAX_INSTANCE_ID,
&max_num_instances,
sizeof(max_num_instances));
/* Do not count first bit, which is used to distinguish instanced and non-instanced objects. */
max_num_instances >>= 1;
if (bvh->objects.size() > max_num_instances) {
progress.set_error(
"Failed to build OptiX acceleration structure because there are too many instances");
return;
}
/* Fill instance descriptions. */
device_vector<OptixInstance> instances(this, "optix tlas instances", MEM_READ_ONLY);
instances.alloc(bvh->objects.size());
/* Calculate total motion transform size and allocate memory for them. */
size_t motion_transform_offset = 0;
if (pipeline_options.usesMotionBlur) {
size_t total_motion_transform_size = 0;
for (Object *const ob : bvh->objects) {
if (ob->is_traceable() && ob->use_motion()) {
total_motion_transform_size = align_up(total_motion_transform_size,
OPTIX_TRANSFORM_BYTE_ALIGNMENT);
const size_t motion_keys = max(ob->get_motion().size(), (size_t)2) - 2;
total_motion_transform_size = total_motion_transform_size +
sizeof(OptixSRTMotionTransform) +
motion_keys * sizeof(OptixSRTData);
}
}
assert(bvh_optix->motion_transform_data->device == this);
bvh_optix->motion_transform_data->alloc_to_device(total_motion_transform_size);
}
for (Object *ob : bvh->objects) {
/* Skip non-traceable objects. */
if (!ob->is_traceable()) {
continue;
}
BVHOptiX *const blas = static_cast<BVHOptiX *>(ob->get_geometry()->bvh);
OptixTraversableHandle handle = blas->traversable_handle;
if (handle == 0) {
continue;
}
OptixInstance &instance = instances[num_instances++];
memset(&instance, 0, sizeof(instance));
/* Clear transform to identity matrix. */
instance.transform[0] = 1.0f;
instance.transform[5] = 1.0f;
instance.transform[10] = 1.0f;
/* Set user instance ID to object index. */
instance.instanceId = ob->get_device_index();
/* Add some of the object visibility bits to the mask.
* __prim_visibility contains the combined visibility bits of all instances, so is not
* reliable if they differ between instances. But the OptiX visibility mask can only contain
* 8 bits, so have to trade-off here and select just a few important ones.
*/
instance.visibilityMask = ob->visibility_for_tracing() & 0xFF;
/* Have to have at least one bit in the mask, or else instance would always be culled. */
if (0 == instance.visibilityMask) {
instance.visibilityMask = 0xFF;
}
if (ob->get_geometry()->is_hair() &&
static_cast<const Hair *>(ob->get_geometry())->curve_shape == CURVE_THICK)
{
if (pipeline_options.usesMotionBlur && ob->get_geometry()->has_motion_blur()) {
/* Select between motion blur and non-motion blur built-in intersection module. */
instance.sbtOffset = PG_HITD_MOTION - PG_HITD;
}
}
else if (ob->get_geometry()->is_pointcloud()) {
/* Use the hit group that has an intersection program for point clouds. */
instance.sbtOffset = PG_HITD_POINTCLOUD - PG_HITD;
/* Also skip point clouds in local trace calls. */
instance.visibilityMask |= 4;
}
# if OPTIX_ABI_VERSION < 55
/* Cannot disable any-hit program for thick curves, since it needs to filter out end-caps. */
else
# endif
{
/* Can disable __anyhit__kernel_optix_visibility_test by default (except for thick curves,
* since it needs to filter out end-caps there).
*
* It is enabled where necessary (visibility mask exceeds 8 bits or the other any-hit
* programs like __anyhit__kernel_optix_shadow_all_hit) via OPTIX_RAY_FLAG_ENFORCE_ANYHIT.
*/
instance.flags = OPTIX_INSTANCE_FLAG_DISABLE_ANYHIT;
}
/* Insert motion traversable if object has motion. */
if (pipeline_options.usesMotionBlur && ob->use_motion()) {
size_t motion_keys = max(ob->get_motion().size(), (size_t)2) - 2;
size_t motion_transform_size = sizeof(OptixSRTMotionTransform) +
motion_keys * sizeof(OptixSRTData);
const CUDAContextScope scope(this);
motion_transform_offset = align_up(motion_transform_offset,
OPTIX_TRANSFORM_BYTE_ALIGNMENT);
CUdeviceptr motion_transform_gpu = bvh_optix->motion_transform_data->device_pointer +
motion_transform_offset;
motion_transform_offset += motion_transform_size;
/* Allocate host side memory for motion transform and fill it with transform data. */
OptixSRTMotionTransform &motion_transform = *reinterpret_cast<OptixSRTMotionTransform *>(
new uint8_t[motion_transform_size]);
motion_transform.child = handle;
motion_transform.motionOptions.numKeys = ob->get_motion().size();
motion_transform.motionOptions.flags = OPTIX_MOTION_FLAG_NONE;
motion_transform.motionOptions.timeBegin = 0.0f;
motion_transform.motionOptions.timeEnd = 1.0f;
OptixSRTData *const srt_data = motion_transform.srtData;
array<DecomposedTransform> decomp(ob->get_motion().size());
transform_motion_decompose(
decomp.data(), ob->get_motion().data(), ob->get_motion().size());
for (size_t i = 0; i < ob->get_motion().size(); ++i) {
/* Scale. */
srt_data[i].sx = decomp[i].y.w; /* scale.x.x */
srt_data[i].sy = decomp[i].z.w; /* scale.y.y */
srt_data[i].sz = decomp[i].w.w; /* scale.z.z */
/* Shear. */
srt_data[i].a = decomp[i].z.x; /* scale.x.y */
srt_data[i].b = decomp[i].z.y; /* scale.x.z */
srt_data[i].c = decomp[i].w.x; /* scale.y.z */
assert(decomp[i].z.z == 0.0f); /* scale.y.x */
assert(decomp[i].w.y == 0.0f); /* scale.z.x */
assert(decomp[i].w.z == 0.0f); /* scale.z.y */
/* Pivot point. */
srt_data[i].pvx = 0.0f;
srt_data[i].pvy = 0.0f;
srt_data[i].pvz = 0.0f;
/* Rotation. */
srt_data[i].qx = decomp[i].x.x;
srt_data[i].qy = decomp[i].x.y;
srt_data[i].qz = decomp[i].x.z;
srt_data[i].qw = decomp[i].x.w;
/* Translation. */
srt_data[i].tx = decomp[i].y.x;
srt_data[i].ty = decomp[i].y.y;
srt_data[i].tz = decomp[i].y.z;
}
/* Upload motion transform to GPU. */
cuMemcpyHtoD(motion_transform_gpu, &motion_transform, motion_transform_size);
delete[] reinterpret_cast<uint8_t *>(&motion_transform);
/* Get traversable handle to motion transform. */
optixConvertPointerToTraversableHandle(context,
motion_transform_gpu,
OPTIX_TRAVERSABLE_TYPE_SRT_MOTION_TRANSFORM,
&instance.traversableHandle);
}
else {
instance.traversableHandle = handle;
if (ob->get_geometry()->is_instanced()) {
/* Set transform matrix. */
memcpy(instance.transform, &ob->get_tfm(), sizeof(instance.transform));
}
}
}
/* Upload instance descriptions. */
instances.resize(num_instances);
instances.copy_to_device();
/* Build top-level acceleration structure (TLAS) */
OptixBuildInput build_input = {};
build_input.type = OPTIX_BUILD_INPUT_TYPE_INSTANCES;
build_input.instanceArray.instances = instances.device_pointer;
build_input.instanceArray.numInstances = num_instances;
if (!build_optix_bvh(bvh_optix, OPTIX_BUILD_OPERATION_BUILD, build_input, 0)) {
progress.set_error("Failed to build OptiX acceleration structure");
}
tlas_handle = bvh_optix->traversable_handle;
}
}
void OptiXDevice::release_bvh(BVH *bvh)
{
thread_scoped_lock lock(delayed_free_bvh_mutex);
/* Do delayed free of BVH memory, since geometry holding BVH might be deleted
* while GPU is still rendering. */
BVHOptiX *const bvh_optix = static_cast<BVHOptiX *>(bvh);
delayed_free_bvh_memory.emplace_back(std::move(bvh_optix->as_data));
delayed_free_bvh_memory.emplace_back(std::move(bvh_optix->motion_transform_data));
bvh_optix->traversable_handle = 0;
}
void OptiXDevice::free_bvh_memory_delayed()
{
thread_scoped_lock lock(delayed_free_bvh_mutex);
delayed_free_bvh_memory.free_memory();
}
void OptiXDevice::const_copy_to(const char *name, void *host, const size_t size)
{
/* Set constant memory for CUDA module. */
CUDADevice::const_copy_to(name, host, size);
if (strcmp(name, "data") == 0) {
assert(size <= sizeof(KernelData));
/* Update traversable handle (since it is different for each device on multi devices). */
KernelData *const data = (KernelData *)host;
*(OptixTraversableHandle *)&data->device_bvh = tlas_handle;
update_launch_params(offsetof(KernelParamsOptiX, data), host, size);
return;
}
/* Update data storage pointers in launch parameters. */
# define KERNEL_DATA_ARRAY(data_type, data_name) \
if (strcmp(name, #data_name) == 0) { \
update_launch_params(offsetof(KernelParamsOptiX, data_name), host, size); \
return; \
}
KERNEL_DATA_ARRAY(IntegratorStateGPU, integrator_state)
# include "kernel/data_arrays.h"
# undef KERNEL_DATA_ARRAY
}
void OptiXDevice::update_launch_params(const size_t offset, void *data, const size_t data_size)
{
const CUDAContextScope scope(this);
cuda_assert(cuMemcpyHtoD(launch_params.device_pointer + offset, data, data_size));
}
CCL_NAMESPACE_END
#endif /* WITH_OPTIX */
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