mirror of
https://github.com/RetroDECK/Duckstation.git
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251 lines
8.9 KiB
C++
251 lines
8.9 KiB
C++
/*
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* Copyright (C) 2014 Patrick Mours
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#pragma once
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#include "effect_token.hpp"
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#include <cstdint>
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namespace reshadefx
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{
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/// <summary>
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/// Structure which encapsulates a parsed value type
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/// </summary>
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struct type
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{
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enum datatype : uint8_t
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{
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t_void,
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t_bool,
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t_min16int,
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t_int,
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t_min16uint,
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t_uint,
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t_min16float,
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t_float,
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t_string,
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t_struct,
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t_texture1d,
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t_texture2d,
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t_texture3d,
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t_sampler1d_int,
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t_sampler2d_int,
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t_sampler3d_int,
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t_sampler1d_uint,
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t_sampler2d_uint,
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t_sampler3d_uint,
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t_sampler1d_float,
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t_sampler2d_float,
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t_sampler3d_float,
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t_storage1d_int,
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t_storage2d_int,
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t_storage3d_int,
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t_storage1d_uint,
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t_storage2d_uint,
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t_storage3d_uint,
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t_storage1d_float,
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t_storage2d_float,
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t_storage3d_float,
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t_function,
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};
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enum qualifier : uint32_t
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{
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q_extern = 1 << 0,
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q_static = 1 << 1,
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q_uniform = 1 << 2,
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q_volatile = 1 << 3,
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q_precise = 1 << 4,
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q_groupshared = 1 << 14,
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q_in = 1 << 5,
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q_out = 1 << 6,
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q_inout = q_in | q_out,
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q_const = 1 << 8,
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q_linear = 1 << 10,
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q_noperspective = 1 << 11,
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q_centroid = 1 << 12,
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q_nointerpolation = 1 << 13,
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};
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/// <summary>
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/// Gets the result type of an operation involving the two input types.
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/// </summary>
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static type merge(const type &lhs, const type &rhs);
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/// <summary>
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/// Calculates the ranking between two types which can be used to select the best matching function overload. The higher the rank, the better the match. A value of zero indicates that the types are not compatible.
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/// </summary>
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static unsigned int rank(const type &src, const type &dst);
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/// <summary>
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/// Returns a human-readable description of this type definition.
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/// </summary>
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std::string description() const;
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bool has(qualifier x) const { return (qualifiers & x) == x; }
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bool is_void() const { return base == t_void; }
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bool is_boolean() const { return base == t_bool; }
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bool is_numeric() const { return base >= t_bool && base <= t_float; }
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bool is_integral() const { return (base >= t_bool && base <= t_uint) || (base >= t_sampler1d_int && base <= t_sampler3d_uint) || (base >= t_storage1d_int && base <= t_storage3d_uint); }
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bool is_floating_point() const { return base == t_min16float || base == t_float || (base >= t_sampler1d_float && base <= t_sampler3d_float) || (base >= t_storage1d_float && base <= t_storage3d_float); }
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bool is_signed() const { return base == t_min16int || base == t_int || (base >= t_sampler1d_int && base <= t_sampler3d_int) || (base >= t_storage1d_int && base <= t_storage3d_int) || is_floating_point(); }
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bool is_unsigned() const { return base == t_min16uint || base == t_uint || (base >= t_sampler1d_uint && base <= t_sampler3d_uint) || (base >= t_storage1d_uint && base <= t_storage3d_uint); }
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bool is_struct() const { return base == t_struct; }
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bool is_object() const { return is_texture() || is_sampler() || is_storage(); }
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bool is_texture() const { return base >= t_texture1d && base <= t_texture3d; }
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bool is_sampler() const { return base >= t_sampler1d_int && base <= t_sampler3d_float; }
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bool is_storage() const { return base >= t_storage1d_int && base <= t_storage3d_float; }
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bool is_function() const { return base == t_function; }
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bool is_array() const { return array_length != 0; }
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bool is_scalar() const { return is_numeric() && !is_matrix() && !is_vector() && !is_array(); }
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bool is_vector() const { return is_numeric() && rows > 1 && cols == 1; }
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bool is_matrix() const { return is_numeric() && rows >= 1 && cols > 1; }
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unsigned int precision() const { return base == t_min16int || base == t_min16uint || base == t_min16float ? 16 : 32; }
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unsigned int components() const { return rows * cols; }
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unsigned int texture_dimension() const { return base >= t_texture1d && base <= t_storage3d_float ? ((base - t_texture1d) % 3) + 1 : 0; }
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friend inline bool operator==(const type &lhs, const type &rhs)
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{
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return lhs.base == rhs.base && lhs.rows == rhs.rows && lhs.cols == rhs.cols && lhs.array_length == rhs.array_length && lhs.definition == rhs.definition;
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}
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friend inline bool operator!=(const type &lhs, const type &rhs)
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{
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return !operator==(lhs, rhs);
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}
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// Underlying base type ('int', 'float', ...)
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datatype base = t_void;
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// Number of rows if this is a vector type
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unsigned int rows = 0;
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// Number of columns if this is a matrix type
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unsigned int cols = 0;
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// Bit mask of all the qualifiers decorating the type
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unsigned int qualifiers = 0;
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// Negative if an unsized array, otherwise the number of elements if this is an array type
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int array_length = 0;
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// ID of the matching struct if this is a struct type
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uint32_t definition = 0;
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};
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/// <summary>
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/// Structure which encapsulates a parsed constant value
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/// </summary>
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struct constant
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{
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union
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{
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float as_float[16];
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int32_t as_int[16];
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uint32_t as_uint[16];
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};
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// Optional string associated with this constant
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std::string string_data;
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// Optional additional elements if this is an array constant
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std::vector<constant> array_data;
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};
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/// <summary>
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/// Structures which keeps track of the access chain of an expression
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/// </summary>
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struct expression
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{
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struct operation
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{
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enum op_type
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{
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op_cast,
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op_member,
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op_dynamic_index,
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op_constant_index,
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op_swizzle,
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};
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op_type op;
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reshadefx::type from, to;
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uint32_t index = 0;
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signed char swizzle[4] = {};
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};
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uint32_t base = 0;
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reshadefx::type type = {};
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reshadefx::constant constant = {};
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bool is_lvalue = false;
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bool is_constant = false;
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reshadefx::location location;
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std::vector<operation> chain;
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/// <summary>
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/// Initializes the expression to a l-value.
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/// </summary>
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/// <param name="loc">Code location of the expression.</param>
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/// <param name="base">SSA ID of the l-value.</param>
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/// <param name="type">Value type of the expression result.</param>
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void reset_to_lvalue(const reshadefx::location &loc, uint32_t base, const reshadefx::type &type);
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/// <summary>
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/// Initializes the expression to a r-value.
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/// </summary>
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/// <param name="loc">Code location of the expression.</param>
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/// <param name="base">SSA ID of the r-value.</param>
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/// <param name="type">Value type of the expression result.</param>
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void reset_to_rvalue(const reshadefx::location &loc, uint32_t base, const reshadefx::type &type);
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/// <summary>
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/// Initializes the expression to a constant value.
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/// </summary>
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/// <param name="loc">Code location of the constant expression.</param>
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/// <param name="data">Constant value to initialize to.</param>
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void reset_to_rvalue_constant(const reshadefx::location &loc, bool data);
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void reset_to_rvalue_constant(const reshadefx::location &loc, float data);
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void reset_to_rvalue_constant(const reshadefx::location &loc, int32_t data);
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void reset_to_rvalue_constant(const reshadefx::location &loc, uint32_t data);
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void reset_to_rvalue_constant(const reshadefx::location &loc, std::string data);
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void reset_to_rvalue_constant(const reshadefx::location &loc, reshadefx::constant data, const reshadefx::type &type);
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/// <summary>
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/// Adds a cast operation to the current access chain.
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/// </summary>
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/// <param name="type">Type to cast the expression to.</param>
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void add_cast_operation(const reshadefx::type &type);
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/// <summary>
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/// Adds a structure member lookup to the current access chain.
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/// </summary>
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/// <param name="index">Index of the member to dereference.</param>
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/// <param name="type">Value type of the member.</param>
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void add_member_access(unsigned int index, const reshadefx::type &type);
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/// <summary>
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/// Adds an index operation to the current access chain.
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/// </summary>
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/// <param name="index_expression">SSA ID of the indexing value.</param>
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void add_dynamic_index_access(uint32_t index_expression);
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/// <summary>
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/// Adds an constant index operation to the current access chain.
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/// </summary>
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/// <param name="index">Constant indexing value.</param>
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void add_constant_index_access(unsigned int index);
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/// <summary>
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/// Adds a swizzle operation to the current access chain.
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/// </summary>
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/// <param name="swizzle">Swizzle for each component. -1 = unused, 0 = x, 1 = y, 2 = z, 3 = w.</param>
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/// <param name="length">Number of components in the swizzle. The maximum is 4.</param>
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void add_swizzle_access(const signed char swizzle[4], unsigned int length);
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/// <summary>
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/// Applies an unary operation to this constant expression.
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/// </summary>
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/// <param name="op">Unary operator to apply.</param>
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bool evaluate_constant_expression(reshadefx::tokenid op);
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/// <summary>
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/// Applies a binary operation to this constant expression.
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/// </summary>
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/// <param name="op">Binary operator to apply.</param>
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/// <param name="rhs">Constant value to use as right-hand side of the binary operation.</param>
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bool evaluate_constant_expression(reshadefx::tokenid op, const reshadefx::constant &rhs);
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};
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}
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