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// Copyright 2023 The Dawn & Tint Authors
//
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#ifndef SRC_TINT_LANG_HLSL_WRITER_COMMON_OPTIONS_H_
#define SRC_TINT_LANG_HLSL_WRITER_COMMON_OPTIONS_H_
#include <bitset>
#include <optional>
#include <unordered_map>
#include <vector>
#include "src/tint/api/common/binding_point.h"
#include "src/tint/api/options/binding_remapper.h"
#include "src/tint/api/options/external_texture.h"
#include "src/tint/api/options/pixel_local.h"
#include "src/tint/lang/core/access.h"
#include "src/tint/utils/math/hash.h"
#include "src/tint/utils/reflection/reflection.h"
namespace tint::hlsl::writer {
namespace binding {
/// Generic binding point
struct BindingInfo {
/// The group
uint32_t group = 0;
/// The binding
uint32_t binding = 0;
/// Equality operator
/// @param rhs the BindingInfo to compare against
/// @returns true if this BindingInfo is equal to `rhs`
inline bool operator==(const BindingInfo& rhs) const {
return group == rhs.group && binding == rhs.binding;
}
/// Inequality operator
/// @param rhs the BindingInfo to compare against
/// @returns true if this BindingInfo is not equal to `rhs`
inline bool operator!=(const BindingInfo& rhs) const { return !(*this == rhs); }
/// @returns the hash code of the BindingInfo
tint::HashCode HashCode() const { return Hash(group, binding); }
/// Reflect the fields of this class so that it can be used by tint::ForeachField()
TINT_REFLECT(BindingInfo, group, binding);
};
using Uniform = BindingInfo;
using Storage = BindingInfo;
using Texture = BindingInfo;
using StorageTexture = BindingInfo;
using Sampler = BindingInfo;
/// An external texture
struct ExternalTexture {
/// Metadata
BindingInfo metadata{};
/// Plane0 binding data
BindingInfo plane0{};
/// Plane1 binding data;
BindingInfo plane1{};
/// Reflect the fields of this class so that it can be used by tint::ForeachField()
TINT_REFLECT(ExternalTexture, metadata, plane0, plane1);
};
} // namespace binding
/// Maps the WGSL binding point to the SPIR-V group,binding for uniforms
using UniformBindings = std::unordered_map<BindingPoint, binding::Uniform>;
/// Maps the WGSL binding point to the SPIR-V group,binding for storage
using StorageBindings = std::unordered_map<BindingPoint, binding::Storage>;
/// Maps the WGSL binding point to the SPIR-V group,binding for textures
using TextureBindings = std::unordered_map<BindingPoint, binding::Texture>;
/// Maps the WGSL binding point to the SPIR-V group,binding for storage textures
using StorageTextureBindings = std::unordered_map<BindingPoint, binding::StorageTexture>;
/// Maps the WGSL binding point to the SPIR-V group,binding for samplers
using SamplerBindings = std::unordered_map<BindingPoint, binding::Sampler>;
/// Maps the WGSL binding point to the plane0, plane1, and metadata for external textures
using ExternalTextureBindings = std::unordered_map<BindingPoint, binding::ExternalTexture>;
/// Binding information
struct Bindings {
/// Uniform bindings
UniformBindings uniform{};
/// Storage bindings
StorageBindings storage{};
/// Texture bindings
TextureBindings texture{};
/// Storage texture bindings
StorageTextureBindings storage_texture{};
/// Sampler bindings
SamplerBindings sampler{};
/// External bindings
ExternalTextureBindings external_texture{};
/// Mapping of BindingPoint to new Access
std::unordered_map<BindingPoint, tint::core::Access> access_controls;
/// The binding points that will be ignored by the rebustness transform.
std::vector<BindingPoint> ignored_by_robustness_transform;
/// Reflect the fields of this class so that it can be used by tint::ForeachField()
TINT_REFLECT(Bindings,
uniform,
storage,
texture,
storage_texture,
sampler,
external_texture,
access_controls,
ignored_by_robustness_transform);
};
/// kMaxInterStageLocations == D3D11_PS_INPUT_REGISTER_COUNT - 2
/// D3D11_PS_INPUT_REGISTER_COUNT == D3D12_PS_INPUT_REGISTER_COUNT
constexpr uint32_t kMaxInterStageLocations = 30;
/// Options used to specify a mapping of binding points to indices into a UBO
/// from which to load buffer sizes.
struct ArrayLengthFromUniformOptions {
/// The HLSL binding point to use to generate a uniform buffer from which to read buffer sizes.
binding::Uniform ubo_binding;
/// The mapping from the storage buffer binding points in WGSL binding-point space to the index
/// into the uniform buffer where the length of the buffer is stored.
std::unordered_map<BindingPoint, uint32_t> bindpoint_to_size_index;
/// Reflect the fields of this class so that it can be used by tint::ForeachField()
TINT_REFLECT(ArrayLengthFromUniformOptions, ubo_binding, bindpoint_to_size_index);
};
/// Configuration options used for generating HLSL.
struct Options {
/// Constructor
Options();
/// Destructor
~Options();
/// Copy constructor
Options(const Options&);
/// Copy assignment
/// @returns this Options
Options& operator=(const Options&);
/// Set to `true` to disable software robustness that prevents out-of-bounds accesses.
bool disable_robustness = false;
/// Set to `true` to disable workgroup memory zero initialization
bool disable_workgroup_init = false;
/// Set to `true` to run the TruncateInterstageVariables transform.
bool truncate_interstage_variables = false;
/// Set to `true` to generate polyfill for `reflect` builtin for vec2<f32>
bool polyfill_reflect_vec2_f32 = false;
/// Set to `true` to generate polyfill for `dot4I8Packed` and `dot4U8Packed` builtins
bool polyfill_dot_4x8_packed = false;
/// Set to `true` to disable the polyfills on integer division and modulo.
bool disable_polyfill_integer_div_mod = false;
/// Set to `true` to generate polyfill for `pack4xI8`, `pack4xU8`, `pack4xI8Clamp`,
/// `unpack4xI8` and `unpack4xU8` builtins
bool polyfill_pack_unpack_4x8 = false;
/// Options used to specify a mapping of binding points to indices into a UBO
/// from which to load buffer sizes.
ArrayLengthFromUniformOptions array_length_from_uniform = {};
/// Interstage locations actually used as inputs in the next stage of the pipeline.
/// This is potentially used for truncating unused interstage outputs at current shader stage.
std::bitset<kMaxInterStageLocations> interstage_locations;
/// The binding point to use for information passed via root constants.
std::optional<BindingPoint> root_constant_binding_point;
/// The bindings
Bindings bindings;
/// Options used to deal with pixel local storage variables
PixelLocalOptions pixel_local_options = {};
/// Reflect the fields of this class so that it can be used by tint::ForeachField()
TINT_REFLECT(Options,
disable_robustness,
disable_workgroup_init,
truncate_interstage_variables,
polyfill_reflect_vec2_f32,
polyfill_dot_4x8_packed,
disable_polyfill_integer_div_mod,
polyfill_pack_unpack_4x8,
array_length_from_uniform,
interstage_locations,
root_constant_binding_point,
bindings,
pixel_local_options);
};
} // namespace tint::hlsl::writer
#endif // SRC_TINT_LANG_HLSL_WRITER_COMMON_OPTIONS_H_