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// Copyright 2009-2021 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#include "../common/tutorial/tutorial_device.isph"
#include "../common/math/random_sampler.isph"
#include "../common/math/sampling.isph"
#include "../common/tutorial/scene_device.h"
/* the scene to render */
extern RTCScene g_scene;
extern ISPCScene* uniform g_ispc_scene;
/* intensity scaling for traversal cost visualization */
extern uniform float scale;
extern uniform bool g_changed;
extern uniform float g_debug;
#if defined(EMBREE_SYCL_TUTORIAL) && !defined(EMBREE_SYCL_RT_SIMULATION)
static const sycl::specialization_id<RTCFeatureFlags> spec_feature_mask;
#endif
extern uniform RTCFeatureFlags g_feature_mask;
struct DebugShaderData
{
RTCScene scene;
RTCTraversable traversable;
ISPCScene* uniform ispc_scene;
/* intensity scaling for traversal cost visualization */
uniform float scale;
uniform float debug;
uniform Shader shader;
};
void DebugShaderData_Constructor(uniform DebugShaderData* uniform This)
{
This->scene = g_scene;
This->traversable = rtcGetSceneTraversable(g_scene);
This->ispc_scene = g_ispc_scene;
This->scale = scale;
This->debug = g_debug;
This->shader = shader;
}
#define RENDER_FRAME_FUNCTION_ISPC(Name) \
void renderTile##Name(uniform int taskIndex, \
uniform int threadIndex, \
const uniform DebugShaderData& data, \
uniform int* uniform pixels, \
const uniform unsigned int width, \
const uniform unsigned int height, \
const uniform float time, \
const uniform ISPCCamera& camera, \
const uniform int numTilesX, \
const uniform int numTilesY) \
{ \
const uniform int t = taskIndex; \
const uniform unsigned int tileY = t / numTilesX; \
const uniform unsigned int tileX = t - tileY * numTilesX; \
const uniform unsigned int x0 = tileX * TILE_SIZE_X; \
const uniform unsigned int x1 = min(x0+TILE_SIZE_X,width); \
const uniform unsigned int y0 = tileY * TILE_SIZE_Y; \
const uniform unsigned int y1 = min(y0+TILE_SIZE_Y,height); \
\
foreach_tiled (y = y0 ... y1, x = x0 ... x1) \
{ \
Vec3f color = renderPixel##Name(data,(float)x,(float)y,camera,g_stats[threadIndex],RTC_FEATURE_FLAG_ALL); \
\
/* write color to framebuffer */ \
unsigned int r = (unsigned int) (255.0f * clamp(color.x,0.0f,1.0f)); \
unsigned int g = (unsigned int) (255.0f * clamp(color.y,0.0f,1.0f)); \
unsigned int b = (unsigned int) (255.0f * clamp(color.z,0.0f,1.0f)); \
pixels[y*width+x] = (b << 16) + (g << 8) + r; \
} \
} \
\
task void renderTileTask##Name(const uniform DebugShaderData& data, \
uniform int* uniform pixels, \
const uniform unsigned int width, \
const uniform unsigned int height, \
const uniform float time, \
const uniform ISPCCamera& camera, \
const uniform int numTilesX, \
const uniform int numTilesY) \
{ \
renderTile##Name(taskIndex,threadIndex,data,pixels,width,height,time,camera,numTilesX,numTilesY); \
} \
\
export void renderFrame##Name (uniform int* uniform pixels, \
const uniform unsigned int width, \
const uniform unsigned int height, \
const uniform float time, \
const uniform ISPCCamera& camera) \
{ \
uniform DebugShaderData data; \
DebugShaderData_Constructor(&data); \
const uniform int numTilesX = (width +TILE_SIZE_X-1)/TILE_SIZE_X; \
const uniform int numTilesY = (height+TILE_SIZE_Y-1)/TILE_SIZE_Y; \
launch[numTilesX*numTilesY] renderTileTask##Name(data,pixels,width,height,time,camera,numTilesX,numTilesY); sync; \
}
#define RENDER_FRAME_FUNCTION_CPP(Name) \
void renderTile##Name(uniform int taskIndex, \
uniform int threadIndex, \
const DebugShaderData& data, \
uniform int* uniform pixels, \
const uniform unsigned int width, \
const uniform unsigned int height, \
const uniform float time, \
const uniform ISPCCamera& camera, \
const uniform int numTilesX, \
const uniform int numTilesY) \
{ \
const uniform int t = taskIndex; \
const uniform unsigned int tileY = t / numTilesX; \
const uniform unsigned int tileX = t - tileY * numTilesX; \
const uniform unsigned int x0 = tileX * TILE_SIZE_X; \
const uniform unsigned int x1 = min(x0+TILE_SIZE_X,width); \
const uniform unsigned int y0 = tileY * TILE_SIZE_Y; \
const uniform unsigned int y1 = min(y0+TILE_SIZE_Y,height); \
\
foreach_tiled (y = y0 ... y1, x = x0 ... x1) \
{ \
Vec3f color = renderPixel##Name(data,(float)x,(float)y,camera,g_stats[threadIndex],RTC_FEATURE_FLAG_ALL); \
\
/* write color to framebuffer */ \
unsigned int r = (unsigned int) (255.0f * clamp(color.x,0.0f,1.0f)); \
unsigned int g = (unsigned int) (255.0f * clamp(color.y,0.0f,1.0f)); \
unsigned int b = (unsigned int) (255.0f * clamp(color.z,0.0f,1.0f)); \
pixels[y*width+x] = (b << 16) + (g << 8) + r; \
} \
} \
\
void renderTileTask##Name(int taskIndex, int threadIndex, \
const DebugShaderData& data, \
uniform int* uniform pixels, \
const uniform unsigned int width, \
const uniform unsigned int height, \
const uniform float time, \
const uniform ISPCCamera& camera, \
const uniform int numTilesX, \
const uniform int numTilesY) \
{ \
renderTile##Name(taskIndex,threadIndex,data,pixels,width,height,time,camera,numTilesX,numTilesY); \
} \
\
extern "C" void renderFrame##Name (uniform int* uniform pixels, \
const uniform unsigned int width, \
const uniform unsigned int height, \
const uniform float time, \
const uniform ISPCCamera& camera) \
{ \
DebugShaderData data; \
DebugShaderData_Constructor(&data); \
const uniform int numTilesX = (width +TILE_SIZE_X-1)/TILE_SIZE_X; \
const uniform int numTilesY = (height+TILE_SIZE_Y-1)/TILE_SIZE_Y; \
parallel_for(size_t(0),size_t(numTilesX*numTilesY),[&](const range<size_t>& range) { \
const int threadIndex = (int)TaskScheduler::threadIndex(); \
for (size_t i=range.begin(); i<range.end(); i++) \
renderTileTask##Name((int)i,threadIndex,data,pixels,width,height,time,camera,numTilesX,numTilesY); \
}); \
}
#define RENDER_FRAME_FUNCTION_SYCL(Name) \
extern "C" void renderFrame##Name (uniform int* uniform pixels, \
const uniform unsigned int width, \
const uniform unsigned int height, \
const uniform float time, \
const uniform ISPCCamera& camera) \
{ \
DebugShaderData data; \
DebugShaderData_Constructor(&data); \
sycl::event event; \
\
event = global_gpu_queue->submit([=](sycl::handler& cgh) {\
cgh.set_specialization_constant<spec_feature_mask>(g_feature_mask);\
const sycl::nd_range<2> nd_range = make_nd_range(height,width); \
cgh.parallel_for(nd_range,[=](sycl::nd_item<2> item, sycl::kernel_handler kh) { \
const unsigned int x = item.get_global_id(1); if (x >= width ) return; \
const unsigned int y = item.get_global_id(0); if (y >= height) return; \
RayStats stats; \
const RTCFeatureFlags feature_mask = kh.get_specialization_constant<spec_feature_mask>(); \
Vec3fa color = renderPixel##Name(data,x,y,camera,stats,feature_mask); \
unsigned int r = (unsigned int) (255.0f * clamp(color.x,0.0f,1.0f)); \
unsigned int g = (unsigned int) (255.0f * clamp(color.y,0.0f,1.0f)); \
unsigned int b = (unsigned int) (255.0f * clamp(color.z,0.0f,1.0f)); \
pixels[y*width+x] = (b << 16) + (g << 8) + r; \
}); \
}); \
global_gpu_queue->wait_and_throw();\
\
const auto t0 = event.template get_profiling_info<sycl::info::event_profiling::command_start>();\
const auto t1 = event.template get_profiling_info<sycl::info::event_profiling::command_end>();\
const double dt = (t1-t0)*1E-9;\
((ISPCCamera*)&camera)->render_time = dt;\
}
Vec3f randomColor(const int ID)
{
int r = ((ID+13)*17*23) & 255;
int g = ((ID+15)*11*13) & 255;
int b = ((ID+17)* 7*19) & 255;
const float oneOver255f = 1.f/255.f;
return make_Vec3f(r*oneOver255f,g*oneOver255f,b*oneOver255f);
}
/* renders a single pixel with eyelight shading */
Vec3f renderPixelDebugShader(const uniform DebugShaderData& data, float x, float y, const uniform ISPCCamera& camera, uniform RayStats& stats, const uniform RTCFeatureFlags feature_mask)
{
/* initialize ray */
Ray ray;
ray.org = make_Vec3f_(camera.xfm.p);
ray.dir = make_Vec3f_(normalize(x*camera.xfm.l.vx + y*camera.xfm.l.vy + camera.xfm.l.vz));
ray.tnear = 0.0f;
ray.tfar = inf;
ray.geomID = RTC_INVALID_GEOMETRY_ID;
ray.primID = RTC_INVALID_GEOMETRY_ID;
ray.mask = -1;
ray.time = data.debug;
/* intersect ray with scene */
uniform int64 c0 = get_tsc();
if (data.shader == SHADER_OCCLUSION)
{
uniform RTCOccludedArguments args;
rtcInitOccludedArguments(&args);
args.feature_mask = feature_mask;
rtcTraversableOccludedV(data.traversable,RTCRay_(ray),&args);
}
else
{
uniform RTCIntersectArguments args;
rtcInitIntersectArguments(&args);
args.feature_mask = feature_mask;
rtcTraversableIntersectV(data.traversable,RTCRayHit_(ray),&args);
}
uniform int64 c1 = get_tsc();
RayStats_addRay(stats);
/* shade pixel */
switch (data.shader)
{
case SHADER_EYELIGHT:
if (ray.geomID == RTC_INVALID_GEOMETRY_ID)
return make_Vec3f(0.0f);
else if (dot(ray.dir,ray.Ng) < 0.0f)
return make_Vec3f(0.0f,abs(dot(ray.dir,normalize(ray.Ng))),0.0f);
else
return make_Vec3f(abs(dot(ray.dir,normalize(ray.Ng))),0.0f,0.0f);
case SHADER_OCCLUSION:
if (ray.tfar >= 0.0f)
return make_Vec3f(0.0f,0.0f,0.0f);
else
return make_Vec3f(1.0f,1.0f,1.0f);
case SHADER_UV:
if (ray.geomID == RTC_INVALID_GEOMETRY_ID) return make_Vec3f(0.0f,0.0f,0.0f);
else return make_Vec3f(ray.u,ray.v,1.0f-ray.u-ray.v);
case SHADER_TEXCOORDS:
case SHADER_TEXCOORDS_GRID:
#if !defined(__SYCL_DEVICE_ONLY__)
if (ray.geomID == RTC_INVALID_GEOMETRY_ID)
return make_Vec3f(0.0f,0.0f,1.0f);
else if (data.ispc_scene)
{
Vec2f st = make_Vec2f(0,0);
foreach_unique (geomID in ray.geomID) {
RTCGeometry geometry = rtcGetGeometry(data.scene,geomID);
rtcInterpolateV0(geometry,ray.primID,ray.u,ray.v,RTC_BUFFER_TYPE_VERTEX_ATTRIBUTE,2,&st.x,2);
}
if (data.shader == SHADER_TEXCOORDS)
return make_Vec3f(st.x,st.y,0.0f);
else
return ((int)(10.0f*st.x)+(int)(10.0f*st.y)) % 2 == 0 ? make_Vec3f(1,0,0) : make_Vec3f(0,1,0);
}
#endif
return make_Vec3f(1.0f);
case SHADER_NG:
if (ray.geomID == RTC_INVALID_GEOMETRY_ID) return make_Vec3f(0.0f,0.0f,0.0f);
else return abs(normalize(make_Vec3f(ray.Ng.x,ray.Ng.y,ray.Ng.z)));
//else return normalize(make_Vec3f(ray.Ng.x,ray.Ng.y,ray.Ng.z));
case SHADER_GEOMID:
if (ray.geomID == RTC_INVALID_GEOMETRY_ID) return make_Vec3f(0.0f);
else return randomColor(ray.geomID);
case SHADER_GEOMID_PRIMID:
if (ray.geomID == RTC_INVALID_GEOMETRY_ID) return make_Vec3f(0.0f);
else return randomColor(ray.geomID ^ ray.primID)*make_Vec3f(abs(dot(ray.dir,normalize(ray.Ng))));
case SHADER_CYCLES:
return make_Vec3f((uniform float)(c1-c0)*data.scale,0.0f,0.0f);
case SHADER_AO:
return make_Vec3f(0,0,0);
case SHADER_DEFAULT:
return make_Vec3f(0,0,0);
}
return make_Vec3f(0,0,0);
}
/* renders a single pixel with eyelight shading */
Vec3f renderPixelAOShader(const uniform DebugShaderData& data, float x, float y, const uniform ISPCCamera& camera, uniform RayStats& stats, const uniform RTCFeatureFlags feature_mask)
{
/* initialize ray */
Ray ray;
ray.org = make_Vec3f_(camera.xfm.p);
ray.dir = make_Vec3f_(normalize(x*camera.xfm.l.vx + y*camera.xfm.l.vy + camera.xfm.l.vz));
ray.tnear = 0.0f;
ray.tfar = inf;
ray.geomID = RTC_INVALID_GEOMETRY_ID;
ray.primID = RTC_INVALID_GEOMETRY_ID;
ray.mask = -1;
ray.time = data.debug;
/* intersect ray with scene */
uniform RTCIntersectArguments args;
rtcInitIntersectArguments(&args);
args.feature_mask = feature_mask;
rtcTraversableIntersectV(data.traversable,RTCRayHit_(ray),&args);
RayStats_addRay(stats);
/* shade pixel */
if (ray.geomID == RTC_INVALID_GEOMETRY_ID) return make_Vec3f(0.0f);
Vec3f Ng = normalize(ray.Ng);
Vec3f Nf = faceforward(Ng,ray.dir,Ng);
Vec3f col = make_Vec3f(min(1.f,.3f+.8f*abs(dot(Ng,normalize(ray.dir)))));
/* calculate hit point */
float intensity = 0;
Vec3f hitPos = ray.org + ray.tfar * ray.dir;
#define AMBIENT_OCCLUSION_SAMPLES 64
/* trace some ambient occlusion rays */
RandomSampler sampler;
RandomSampler_init(sampler, (int)x, (int)y, 0);
for (uniform int i=0; i<AMBIENT_OCCLUSION_SAMPLES; i++)
{
Vec2f sample = RandomSampler_get2D(sampler);
Sample3f dir = cosineSampleHemisphere(sample.x,sample.y,Nf);
/* initialize shadow ray */
Ray shadow;
shadow.org = make_Vec3f_(hitPos);
shadow.dir = make_Vec3f_(dir.v);
shadow.tnear = 0.001f;
shadow.tfar = inf;
shadow.geomID = RTC_INVALID_GEOMETRY_ID;
shadow.primID = RTC_INVALID_GEOMETRY_ID;
shadow.mask = -1;
shadow.time = data.debug;
/* trace shadow ray */
uniform RTCOccludedArguments args;
rtcInitOccludedArguments(&args);
args.feature_mask = feature_mask;
rtcTraversableOccludedV(data.traversable,RTCRay_(shadow),&args);
RayStats_addShadowRay(stats);
/* add light contribution */
if (shadow.tfar >= 0.0f)
intensity += 1.0f;
}
intensity *= 1.0f/AMBIENT_OCCLUSION_SAMPLES;
/* shade pixel */
return col * intensity;
}
#if defined(EMBREE_SYCL_TUTORIAL) && !defined(EMBREE_SYCL_RT_SIMULATION)
RENDER_FRAME_FUNCTION_SYCL(DebugShader)
RENDER_FRAME_FUNCTION_SYCL(AOShader)
#else
RENDER_FRAME_FUNCTION_ISPC(DebugShader)
RENDER_FRAME_FUNCTION_ISPC(AOShader)
#endif
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