/* SPDX-License-Identifier: Apache-2.0
 * Copyright 2011-2022 Blender Foundation */

#pragma once

CCL_NAMESPACE_BEGIN

struct DeviceString {
#if defined(__KERNEL_GPU__)
  /* Strings are represented by their hashes in CUDA and OptiX. */
  size_t str_;

  ccl_device_inline_method uint64_t hash() const
  {
    return str_;
  }
#elif defined(OPENIMAGEIO_USTRING_H)
  ustring str_;

  ccl_device_inline_method uint64_t hash() const
  {
    return str_.hash();
  }
#else
  const char *str_;
#endif

  ccl_device_inline_method bool operator==(DeviceString b) const
  {
    return str_ == b.str_;
  }
  ccl_device_inline_method bool operator!=(DeviceString b) const
  {
    return str_ != b.str_;
  }
};

ccl_device_inline DeviceString make_string(const char *str, size_t hash)
{
#if defined(__KERNEL_GPU__)
  (void)str;
  return {hash};
#elif defined(OPENIMAGEIO_USTRING_H)
  (void)hash;
  return {ustring(str)};
#else
  (void)hash;
  return {str};
#endif
}

/* Closure */

enum OSLClosureType {
  OSL_CLOSURE_MUL_ID = -1,
  OSL_CLOSURE_ADD_ID = -2,

  OSL_CLOSURE_NONE_ID = 0,

#define OSL_CLOSURE_STRUCT_BEGIN(Upper, lower) OSL_CLOSURE_##Upper##_ID,
#include "closures_template.h"
};

struct OSLClosure {
  OSLClosureType id;
};

struct ccl_align(8) OSLClosureMul : public OSLClosure
{
  packed_float3 weight;
  ccl_private const OSLClosure *closure;
};

struct ccl_align(8) OSLClosureAdd : public OSLClosure
{
  ccl_private const OSLClosure *closureA;
  ccl_private const OSLClosure *closureB;
};

struct ccl_align(8) OSLClosureComponent : public OSLClosure
{
  packed_float3 weight;
};

/* Globals */

struct ShaderGlobals {
  packed_float3 P, dPdx, dPdy;
  packed_float3 dPdz;
  packed_float3 I, dIdx, dIdy;
  packed_float3 N;
  packed_float3 Ng;
  float u, dudx, dudy;
  float v, dvdx, dvdy;
  packed_float3 dPdu, dPdv;
  float time;
  float dtime;
  packed_float3 dPdtime;
  packed_float3 Ps, dPsdx, dPsdy;
  ccl_private void *renderstate;
  ccl_private void *tracedata;
  ccl_private void *objdata;
  void *context;
  void *renderer;
  ccl_private void *object2common;
  ccl_private void *shader2common;
  ccl_private OSLClosure *Ci;
  float surfacearea;
  int raytype;
  int flipHandedness;
  int backfacing;
};

struct OSLNoiseOptions {
};

struct OSLTextureOptions {
};

CCL_NAMESPACE_END