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test/intern/cycles/kernel/osl/services.h
Sergey Sharybin dcae48d1d3 Cycles: Add Portal Depth light pass information 
It allows to implement tricks based on a knowledge whether the path
ever cam through a portal or not, and even something more advanced
based on the number of portals.

The main current objective is for strokes shading: stroke shader
uses Ray Portal BSDF to place ray to the center of the stroke and
point it in the direction of the surface it is generated for. This
gives stroke a single color which matches shading of the original
object. For this usecase to work the ray bounced from the original
surface should ignore the strokes, which is now possible by using
Portal Depth input and mixing with the Transparent BSDF. It also
helps to make shading look better when there are multiple stroke
layers.

A solution of using portal depth is chosen over a single flag due
to various factors:
- Last time we've looked into it it was a bit tricky to implement
	as a flag due to us running out of bits.
- It feels to be more flexible solution, even though it is a bit
	hard to come up with 100% compelling setup for it.
- It needs to be slightly different from the current "Is Foo"
	flags, and be more "Is Portal Descendant" or something.

An extra uint16 is added to the state to count the portal depth,
but it is only allocated for scenes that use Ray Portal BSDF.

Portal BSDF still increments Transparent bounce, as it is required
to have some "limiting" factor so that ray does not get infinitely
move to different place of the scene.

Ref #125213

Pull Request: https://projects.blender.org/blender/blender/pulls/143107
2025-07-25 18:09:38 +02:00

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/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
*
* SPDX-License-Identifier: Apache-2.0 */
#pragma once
/* OSL Render Services
*
* Implementation of OSL render services, to retriever matrices, attributes,
* textures and point clouds. In principle this should only be accessing
* kernel data, but currently we also reach back into the Scene to retrieve
* attributes.
*/
#include <OSL/oslclosure.h>
#include <OSL/oslexec.h>
#include <OSL/rendererservices.h>
#include <OpenImageIO/unordered_map_concurrent.h>
#include "scene/image.h"
#include "kernel/osl/compat.h"
#include "kernel/osl/types.h"
CCL_NAMESPACE_BEGIN
class Scene;
struct ShaderData;
struct ThreadKernelGlobalsCPU;
/* OSL Texture Handle
*
* OSL texture lookups are string based. If those strings are known at compile
* time, the OSL compiler can cache a texture handle to use instead of a string.
*
* By default it uses TextureSystem::TextureHandle. But since we want to support
* different kinds of textures and color space conversions, this is our own handle
* with additional data.
*
* These are stored in a concurrent hash map, because OSL can compile multiple
* shaders in parallel.
*
* NOTE: The svm_slots array contains a compressed mapping of tile to svm_slot pairs
* stored as follows: x:tile_a, y:svm_slot_a, z:tile_b, w:svm_slot_b etc. */
struct OSLTextureHandle {
enum Type { OIIO, SVM, IES, BEVEL, AO };
OSLTextureHandle(Type type, const vector<int4> &svm_slots) : type(type), svm_slots(svm_slots) {}
OSLTextureHandle(Type type = OIIO, const int svm_slot = -1)
: OSLTextureHandle(type, {make_int4(0, svm_slot, -1, -1)})
{
}
OSLTextureHandle(const ImageHandle &handle)
: type(SVM), svm_slots(handle.get_svm_slots()), handle(handle)
{
}
Type type;
vector<int4> svm_slots;
OSL::TextureSystem::TextureHandle *oiio_handle = nullptr;
ColorSpaceProcessor *processor = nullptr;
ImageHandle handle;
};
using OSLTextureHandleMap = OIIO::unordered_map_concurrent<OSLUStringHash, OSLTextureHandle>;
/* OSL Render Services
*
* Interface for OSL to access attributes, textures and other scene data. */
class OSLRenderServices : public OSL::RendererServices {
public:
OSLRenderServices(OSL::TextureSystem *texture_system, const int device_type);
~OSLRenderServices() override;
static void register_closures(OSL::ShadingSystem *ss);
int supports(string_view feature) const override;
bool get_matrix(OSL::ShaderGlobals *sg,
OSL::Matrix44 &result,
OSL::TransformationPtr xform,
float time) override;
bool get_inverse_matrix(OSL::ShaderGlobals *sg,
OSL::Matrix44 &result,
OSL::TransformationPtr xform,
float time) override;
bool get_matrix(OSL::ShaderGlobals *sg,
OSL::Matrix44 &result,
OSLUStringHash from,
float time) override;
bool get_inverse_matrix(OSL::ShaderGlobals *sg,
OSL::Matrix44 &result,
OSLUStringHash to,
float time) override;
bool get_matrix(OSL::ShaderGlobals *sg,
OSL::Matrix44 &result,
OSL::TransformationPtr xform) override;
bool get_inverse_matrix(OSL::ShaderGlobals *sg,
OSL::Matrix44 &result,
OSL::TransformationPtr xform) override;
bool get_matrix(OSL::ShaderGlobals *sg, OSL::Matrix44 &result, OSLUStringHash from) override;
bool get_inverse_matrix(OSL::ShaderGlobals *sg,
OSL::Matrix44 &result,
OSLUStringHash to) override;
bool get_array_attribute(OSL::ShaderGlobals *sg,
bool derivatives,
OSLUStringHash object,
const TypeDesc type,
OSLUStringHash name,
const int index,
void *val) override;
bool get_attribute(OSL::ShaderGlobals *sg,
bool derivatives,
OSLUStringHash object,
const TypeDesc type,
OSLUStringHash name,
void *val) override;
bool get_userdata(bool derivatives,
OSLUStringHash name,
const TypeDesc type,
OSL::ShaderGlobals *sg,
void *val) override;
int pointcloud_search(OSL::ShaderGlobals *sg,
OSLUStringHash filename,
const OSL::Vec3 &center,
const float radius,
const int max_points,
bool sort,
#if OSL_LIBRARY_VERSION_CODE >= 11400
int *out_indices,
#else
size_t *out_indices,
#endif
float *out_distances,
int derivs_offset) override;
int pointcloud_get(OSL::ShaderGlobals *sg,
OSLUStringHash filename,
#if OSL_LIBRARY_VERSION_CODE >= 11400
const int *indices,
#else
size_t *indices,
#endif
const int count,
OSLUStringHash attr_name,
const TypeDesc attr_type,
void *out_data) override;
bool pointcloud_write(OSL::ShaderGlobals *sg,
OSLUStringHash filename,
const OSL::Vec3 &pos,
const int nattribs,
const OSLUStringRep *names,
const TypeDesc *types,
const void **data) override;
bool trace(TraceOpt &options,
OSL::ShaderGlobals *sg,
const OSL::Vec3 &P,
const OSL::Vec3 &dPdx,
const OSL::Vec3 &dPdy,
const OSL::Vec3 &R,
const OSL::Vec3 &dRdx,
const OSL::Vec3 &dRdy) override;
bool getmessage(OSL::ShaderGlobals *sg,
OSLUStringHash source,
OSLUStringHash name,
const TypeDesc type,
void *val,
bool derivatives) override;
OSL::TextureSystem::TextureHandle *get_texture_handle(OSL::ustring filename,
OSL::ShadingContext *context,
const OSL::TextureOpt *options) override;
OSL::TextureSystem::TextureHandle *get_texture_handle(OSLUStringHash filename,
OSL::ShadingContext *context,
const OSL::TextureOpt *options) override;
bool good(OSL::TextureSystem::TextureHandle *texture_handle) override;
bool texture(OSLUStringHash filename,
OSL::TextureSystem::TextureHandle *texture_handle,
TexturePerthread *texture_thread_info,
OSL::TextureOpt &options,
OSL::ShaderGlobals *sg,
const float s,
const float t,
const float dsdx,
const float dtdx,
const float dsdy,
const float dtdy,
const int nchannels,
float *result,
float *dresultds,
float *dresultdt,
OSLUStringHash *errormessage) override;
bool texture3d(OSLUStringHash filename,
TextureHandle *texture_handle,
TexturePerthread *texture_thread_info,
OSL::TextureOpt &options,
OSL::ShaderGlobals *sg,
const OSL::Vec3 &P,
const OSL::Vec3 &dPdx,
const OSL::Vec3 &dPdy,
const OSL::Vec3 &dPdz,
const int nchannels,
float *result,
float *dresultds,
float *dresultdt,
float *dresultdr,
OSLUStringHash *errormessage) override;
bool environment(OSLUStringHash filename,
TextureHandle *texture_handle,
TexturePerthread *texture_thread_info,
OSL::TextureOpt &options,
OSL::ShaderGlobals *sg,
const OSL::Vec3 &R,
const OSL::Vec3 &dRdx,
const OSL::Vec3 &dRdy,
const int nchannels,
float *result,
float *dresultds,
float *dresultdt,
OSLUStringHash *errormessage) override;
bool get_texture_info(OSLUStringHash filename,
TextureHandle *texture_handle,
TexturePerthread *texture_thread_info,
OSL::ShaderGlobals *sg,
const int subimage,
OSLUStringHash dataname,
const TypeDesc datatype,
void *data,
OSLUStringHash *errormessage) override;
static bool get_background_attribute(ShaderGlobals *globals,
OSLUStringHash name,
const TypeDesc type,
bool derivatives,
void *val);
static bool get_camera_attribute(
ShaderGlobals *globals, OSLUStringHash name, TypeDesc type, bool derivatives, void *val);
static bool get_object_standard_attribute(ShaderGlobals *globals,
OSLUStringHash name,
const TypeDesc type,
bool derivatives,
void *val);
static ustring u_distance;
static ustring u_index;
static ustring u_world;
static ustring u_camera;
static ustring u_screen;
static ustring u_raster;
static ustring u_ndc;
static ustring u_object_location;
static ustring u_object_color;
static ustring u_object_alpha;
static ustring u_object_index;
static ustring u_object_is_light;
static ustring u_bump_map_normal;
static ustring u_geom_dupli_generated;
static ustring u_geom_dupli_uv;
static ustring u_material_index;
static ustring u_object_random;
static ustring u_particle_index;
static ustring u_particle_random;
static ustring u_particle_age;
static ustring u_particle_lifetime;
static ustring u_particle_location;
static ustring u_particle_rotation;
static ustring u_particle_size;
static ustring u_particle_velocity;
static ustring u_particle_angular_velocity;
static ustring u_geom_numpolyvertices;
static ustring u_geom_trianglevertices;
static ustring u_geom_polyvertices;
static ustring u_geom_name;
static ustring u_geom_undisplaced;
static ustring u_is_smooth;
static ustring u_is_curve;
static ustring u_curve_thickness;
static ustring u_curve_length;
static ustring u_curve_tangent_normal;
static ustring u_curve_random;
static ustring u_is_point;
static ustring u_point_position;
static ustring u_point_radius;
static ustring u_point_random;
static ustring u_normal_map_normal;
static ustring u_path_ray_length;
static ustring u_path_ray_depth;
static ustring u_path_diffuse_depth;
static ustring u_path_glossy_depth;
static ustring u_path_transparent_depth;
static ustring u_path_transmission_depth;
static ustring u_path_portal_depth;
static ustring u_trace;
static ustring u_hit;
static ustring u_hitdist;
static ustring u_N;
static ustring u_Ng;
static ustring u_P;
static ustring u_I;
static ustring u_u;
static ustring u_v;
static ustring u_empty;
static ustring u_at_bevel;
static ustring u_at_ao;
/* Attributes for camera shaders. */
static ustring u_sensor_size;
static ustring u_image_resolution;
static ustring u_aperture_aspect_ratio;
static ustring u_aperture_size;
static ustring u_aperture_position;
static ustring u_focal_distance;
/* Texture system and texture handle map are part of the services instead of
* globals to be shared between different render sessions. This saves memory,
* and is required because texture handles are cached as part of the shared
* shading system. */
OSLTextureHandleMap textures;
static ImageManager *image_manager;
private:
int device_type_;
};
CCL_NAMESPACE_END
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