98 lines
2.3 KiB
C++
98 lines
2.3 KiB
C++
#pragma once
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#include <filesystem>
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#include "assets/path_id_lookups.hpp"
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#include "assets/data_stores/shader_source_store.hpp"
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#include "assets/data/shader_source_data.hpp"
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namespace assets
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{
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struct glsl_parser
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{
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static constexpr auto name = std::string_view("glsl");
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using data_type = shader_source_data;
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using store_type = shader_source_store;
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using lookup_type = shader_source_id_lookup;
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[[nodiscard]] std::error_code prefetch(
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path_id_lookups& lookups
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);
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[[nodiscard]] std::error_code load(
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const path_id_lookups& lookups,
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store_type& store,
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bool pedantic = false
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);
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protected:
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class parser_context
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{
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public:
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parser_context(store_type& m_store);
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void operator()(lookup_type::const_pointer entry) noexcept;
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protected:
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void reset();
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void tokenize_declarations();
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[[nodiscard]] bool parse_metadata_from_tokens();
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void remove_metadata_declarations();
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private:
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store_type* m_store;
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shader_source_data m_buffer{};
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std::vector<std::string_view> m_value_buffer{};
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std::vector<std::size_t> m_declaration_value_count_buffer{};
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std::array<std::size_t, 4> m_declaration_type_index_buffer{};
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};
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[[nodiscard]] static std::error_code read_file(
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const std::filesystem::path& filename,
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std::vector<char>& source
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);
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[[nodiscard]] static bool parse_geometry_declaration(
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std::span<const std::string_view> values,
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shader_source_data::metadata& meta
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);
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[[nodiscard]] static bool parse_stage_declaration(
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std::span<const std::string_view> values,
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shader_source_data::metadata& meta
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);
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[[nodiscard]] static bool parse_components_declaration(
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std::span<const std::string_view> values,
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shader_source_data::metadata& meta
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);
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[[nodiscard]] static bool parse_static_enable_declaration(
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std::span<const std::string_view> values,
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shader_source_data::metadata& meta
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);
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[[nodiscard]] static bool parse_dynamic_enable_declaration(
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std::span<const std::string_view> values,
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shader_source_data::metadata& meta
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);
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[[nodiscard]] static bool parse_component_tokens(
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std::span<const std::string_view> values,
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model_geometry::types geometry_type,
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shader_components::flags& components
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);
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private:
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std::vector<std::string_view> m_value_token_buffer;
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std::vector<std::size_t> m_declaration_token_count_buffer;
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std::array<std::size_t, 4> m_declaration_type_index_buffer;
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std::vector<lookup_type::const_pointer> m_path_buffer;
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};
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}
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