/* * Copyright 2015-2018 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef SPIRV_CROSS_GLSL_HPP #define SPIRV_CROSS_GLSL_HPP #include "spirv_cross.hpp" #include #include #include #include namespace spirv_cross { enum PlsFormat { PlsNone = 0, PlsR11FG11FB10F, PlsR32F, PlsRG16F, PlsRGB10A2, PlsRGBA8, PlsRG16, PlsRGBA8I, PlsRG16I, PlsRGB10A2UI, PlsRGBA8UI, PlsRG16UI, PlsR32UI }; struct PlsRemap { uint32_t id; PlsFormat format; }; class CompilerGLSL : public Compiler { public: struct Options { // The shading language version. Corresponds to #version $VALUE. uint32_t version = 450; // Emit the OpenGL ES shading language instead of desktop OpenGL. bool es = false; // Debug option to always emit temporary variables for all expressions. bool force_temporary = false; // If true, Vulkan GLSL features are used instead of GL-compatible features. // Mostly useful for debugging SPIR-V files. bool vulkan_semantics = false; // If true, gl_PerVertex is explicitly redeclared in vertex, geometry and tessellation shaders. // The members of gl_PerVertex is determined by which built-ins are declared by the shader. // This option is ignored in ES versions, as redeclaration in ES is not required, and it depends on a different extension // (EXT_shader_io_blocks) which makes things a bit more fuzzy. bool separate_shader_objects = false; // Flattens multidimensional arrays, e.g. float foo[a][b][c] into single-dimensional arrays, // e.g. float foo[a * b * c]. // This function does not change the actual SPIRType of any object. // Only the generated code, including declarations of interface variables are changed to be single array dimension. bool flatten_multidimensional_arrays = false; // For older desktop GLSL targets than version 420, the // GL_ARB_shading_language_420pack extensions is used to be able to support // layout(binding) on UBOs and samplers. // If disabled on older targets, binding decorations will be stripped. bool enable_420pack_extension = true; enum Precision { DontCare, Lowp, Mediump, Highp }; struct { // GLSL: In vertex shaders, rewrite [0, w] depth (Vulkan/D3D style) to [-w, w] depth (GL style). // MSL: In vertex shaders, rewrite [-w, w] depth (GL style) to [0, w] depth. // HLSL: In vertex shaders, rewrite [-w, w] depth (GL style) to [0, w] depth. bool fixup_clipspace = false; // Inverts gl_Position.y or equivalent. bool flip_vert_y = false; // If true, the backend will assume that InstanceIndex will need to apply // a base instance offset. Set to false if you know you will never use base instance // functionality as it might remove some internal uniforms. bool support_nonzero_base_instance = true; } vertex; struct { // Add precision mediump float in ES targets when emitting GLES source. // Add precision highp int in ES targets when emitting GLES source. Precision default_float_precision = Mediump; Precision default_int_precision = Highp; } fragment; }; void remap_pixel_local_storage(std::vector inputs, std::vector outputs) { pls_inputs = std::move(inputs); pls_outputs = std::move(outputs); remap_pls_variables(); } CompilerGLSL(std::vector spirv_) : Compiler(move(spirv_)) { init(); } CompilerGLSL(const uint32_t *ir, size_t word_count) : Compiler(ir, word_count) { init(); } // Deprecate this interface because it doesn't overload properly with subclasses. // Requires awkward static casting, which was a mistake. SPIRV_CROSS_DEPRECATED("get_options() is obsolete, use get_common_options() instead.") const Options &get_options() const { return options; } const Options &get_common_options() const { return options; } // Deprecate this interface because it doesn't overload properly with subclasses. // Requires awkward static casting, which was a mistake. SPIRV_CROSS_DEPRECATED("set_options() is obsolete, use set_common_options() instead.") void set_options(Options &opts) { options = opts; } void set_common_options(const Options &opts) { options = opts; } std::string compile() override; // Returns the current string held in the conversion buffer. Useful for // capturing what has been converted so far when compile() throws an error. std::string get_partial_source(); // Adds a line to be added right after #version in GLSL backend. // This is useful for enabling custom extensions which are outside the scope of SPIRV-Cross. // This can be combined with variable remapping. // A new-line will be added. // // While add_header_line() is a more generic way of adding arbitrary text to the header // of a GLSL file, require_extension() should be used when adding extensions since it will // avoid creating collisions with SPIRV-Cross generated extensions. // // Code added via add_header_line() is typically backend-specific. void add_header_line(const std::string &str); // Adds an extension which is required to run this shader, e.g. // require_extension("GL_KHR_my_extension"); void require_extension(const std::string &ext); // Legacy GLSL compatibility method. // Takes a uniform or push constant variable and flattens it into a (i|u)vec4 array[N]; array instead. // For this to work, all types in the block must be the same basic type, e.g. mixing vec2 and vec4 is fine, but // mixing int and float is not. // The name of the uniform array will be the same as the interface block name. void flatten_buffer_block(uint32_t id); protected: void reset(); void emit_function(SPIRFunction &func, const Bitset &return_flags); bool has_extension(const std::string &ext) const; void require_extension_internal(const std::string &ext); // Virtualize methods which need to be overridden by subclass targets like C++ and such. virtual void emit_function_prototype(SPIRFunction &func, const Bitset &return_flags); SPIRBlock *current_emitting_block = nullptr; SPIRBlock *current_emitting_switch = nullptr; virtual void emit_instruction(const Instruction &instr); void emit_block_instructions(SPIRBlock &block); virtual void emit_glsl_op(uint32_t result_type, uint32_t result_id, uint32_t op, const uint32_t *args, uint32_t count); virtual void emit_spv_amd_shader_ballot_op(uint32_t result_type, uint32_t result_id, uint32_t op, const uint32_t *args, uint32_t count); virtual void emit_spv_amd_shader_explicit_vertex_parameter_op(uint32_t result_type, uint32_t result_id, uint32_t op, const uint32_t *args, uint32_t count); virtual void emit_spv_amd_shader_trinary_minmax_op(uint32_t result_type, uint32_t result_id, uint32_t op, const uint32_t *args, uint32_t count); virtual void emit_spv_amd_gcn_shader_op(uint32_t result_type, uint32_t result_id, uint32_t op, const uint32_t *args, uint32_t count); virtual void emit_header(); virtual void emit_sampled_image_op(uint32_t result_type, uint32_t result_id, uint32_t image_id, uint32_t samp_id); virtual void emit_texture_op(const Instruction &i); virtual void emit_subgroup_op(const Instruction &i); virtual std::string type_to_glsl(const SPIRType &type, uint32_t id = 0); virtual std::string builtin_to_glsl(spv::BuiltIn builtin, spv::StorageClass storage); virtual void emit_struct_member(const SPIRType &type, uint32_t member_type_id, uint32_t index, const std::string &qualifier = "", uint32_t base_offset = 0); virtual std::string image_type_glsl(const SPIRType &type, uint32_t id = 0); std::string constant_expression(const SPIRConstant &c); std::string constant_op_expression(const SPIRConstantOp &cop); virtual std::string constant_expression_vector(const SPIRConstant &c, uint32_t vector); virtual void emit_fixup(); virtual std::string variable_decl(const SPIRType &type, const std::string &name, uint32_t id = 0); virtual std::string to_func_call_arg(uint32_t id); virtual std::string to_function_name(uint32_t img, const SPIRType &imgtype, bool is_fetch, bool is_gather, bool is_proj, bool has_array_offsets, bool has_offset, bool has_grad, bool has_dref, uint32_t lod); virtual std::string to_function_args(uint32_t img, const SPIRType &imgtype, bool is_fetch, bool is_gather, bool is_proj, uint32_t coord, uint32_t coord_components, uint32_t dref, uint32_t grad_x, uint32_t grad_y, uint32_t lod, uint32_t coffset, uint32_t offset, uint32_t bias, uint32_t comp, uint32_t sample, bool *p_forward); virtual void emit_buffer_block(const SPIRVariable &type); virtual void emit_push_constant_block(const SPIRVariable &var); virtual void emit_uniform(const SPIRVariable &var); virtual std::string unpack_expression_type(std::string expr_str, const SPIRType &type); std::unique_ptr buffer; template inline void statement_inner(T &&t) { (*buffer) << std::forward(t); statement_count++; } template inline void statement_inner(T &&t, Ts &&... ts) { (*buffer) << std::forward(t); statement_count++; statement_inner(std::forward(ts)...); } template inline void statement(Ts &&... ts) { if (force_recompile) { // Do not bother emitting code while force_recompile is active. // We will compile again. statement_count++; return; } if (redirect_statement) redirect_statement->push_back(join(std::forward(ts)...)); else { for (uint32_t i = 0; i < indent; i++) (*buffer) << " "; statement_inner(std::forward(ts)...); (*buffer) << '\n'; } } template inline void statement_no_indent(Ts &&... ts) { auto old_indent = indent; indent = 0; statement(std::forward(ts)...); indent = old_indent; } // Used for implementing continue blocks where // we want to obtain a list of statements we can merge // on a single line separated by comma. std::vector *redirect_statement = nullptr; const SPIRBlock *current_continue_block = nullptr; void begin_scope(); void end_scope(); void end_scope_decl(); void end_scope_decl(const std::string &decl); Options options; std::string type_to_array_glsl(const SPIRType &type); std::string to_array_size(const SPIRType &type, uint32_t index); uint32_t to_array_size_literal(const SPIRType &type, uint32_t index) const; std::string variable_decl(const SPIRVariable &variable); std::string variable_decl_function_local(SPIRVariable &variable); void add_local_variable_name(uint32_t id); void add_resource_name(uint32_t id); void add_member_name(SPIRType &type, uint32_t name); void add_function_overload(const SPIRFunction &func); virtual bool is_non_native_row_major_matrix(uint32_t id); virtual bool member_is_non_native_row_major_matrix(const SPIRType &type, uint32_t index); bool member_is_packed_type(const SPIRType &type, uint32_t index) const; virtual std::string convert_row_major_matrix(std::string exp_str, const SPIRType &exp_type, bool is_packed); std::unordered_set local_variable_names; std::unordered_set resource_names; std::unordered_set block_input_names; std::unordered_set block_output_names; std::unordered_set block_ubo_names; std::unordered_set block_ssbo_names; std::unordered_map> function_overloads; bool processing_entry_point = false; // Can be overriden by subclass backends for trivial things which // shouldn't need polymorphism. struct BackendVariations { std::string discard_literal = "discard"; bool float_literal_suffix = false; bool double_literal_suffix = true; bool uint32_t_literal_suffix = true; bool long_long_literal_suffix = false; const char *basic_int_type = "int"; const char *basic_uint_type = "uint"; const char *half_literal_suffix = "hf"; bool swizzle_is_function = false; bool shared_is_implied = false; bool flexible_member_array_supported = true; bool explicit_struct_type = false; bool use_initializer_list = false; bool use_typed_initializer_list = false; bool can_declare_struct_inline = true; bool can_declare_arrays_inline = true; bool native_row_major_matrix = true; bool use_constructor_splatting = true; bool boolean_mix_support = true; bool allow_precision_qualifiers = false; bool can_swizzle_scalar = false; bool force_gl_in_out_block = false; bool can_return_array = true; bool allow_truncated_access_chain = false; bool supports_extensions = false; bool supports_empty_struct = false; bool array_is_value_type = true; } backend; void emit_struct(SPIRType &type); void emit_resources(); void emit_buffer_block_native(const SPIRVariable &var); void emit_buffer_block_legacy(const SPIRVariable &var); void emit_buffer_block_flattened(const SPIRVariable &type); void emit_declared_builtin_block(spv::StorageClass storage, spv::ExecutionModel model); void emit_push_constant_block_vulkan(const SPIRVariable &var); void emit_push_constant_block_glsl(const SPIRVariable &var); void emit_interface_block(const SPIRVariable &type); void emit_flattened_io_block(const SPIRVariable &var, const char *qual); void emit_block_chain(SPIRBlock &block); void emit_hoisted_temporaries(std::vector> &temporaries); void emit_constant(const SPIRConstant &constant); void emit_specialization_constant_op(const SPIRConstantOp &constant); std::string emit_continue_block(uint32_t continue_block); bool attempt_emit_loop_header(SPIRBlock &block, SPIRBlock::Method method); void propagate_loop_dominators(const SPIRBlock &block); void branch(uint32_t from, uint32_t to); void branch_to_continue(uint32_t from, uint32_t to); void branch(uint32_t from, uint32_t cond, uint32_t true_block, uint32_t false_block); void flush_phi(uint32_t from, uint32_t to); bool flush_phi_required(uint32_t from, uint32_t to); void flush_variable_declaration(uint32_t id); void flush_undeclared_variables(SPIRBlock &block); bool should_forward(uint32_t id); void emit_mix_op(uint32_t result_type, uint32_t id, uint32_t left, uint32_t right, uint32_t lerp); bool to_trivial_mix_op(const SPIRType &type, std::string &op, uint32_t left, uint32_t right, uint32_t lerp); void emit_quaternary_func_op(uint32_t result_type, uint32_t result_id, uint32_t op0, uint32_t op1, uint32_t op2, uint32_t op3, const char *op); void emit_trinary_func_op(uint32_t result_type, uint32_t result_id, uint32_t op0, uint32_t op1, uint32_t op2, const char *op); void emit_binary_func_op(uint32_t result_type, uint32_t result_id, uint32_t op0, uint32_t op1, const char *op); void emit_binary_func_op_cast(uint32_t result_type, uint32_t result_id, uint32_t op0, uint32_t op1, const char *op, SPIRType::BaseType input_type, bool skip_cast_if_equal_type); void emit_unary_func_op(uint32_t result_type, uint32_t result_id, uint32_t op0, const char *op); void emit_unrolled_unary_op(uint32_t result_type, uint32_t result_id, uint32_t operand, const char *op); void emit_binary_op(uint32_t result_type, uint32_t result_id, uint32_t op0, uint32_t op1, const char *op); void emit_unrolled_binary_op(uint32_t result_type, uint32_t result_id, uint32_t op0, uint32_t op1, const char *op); void emit_binary_op_cast(uint32_t result_type, uint32_t result_id, uint32_t op0, uint32_t op1, const char *op, SPIRType::BaseType input_type, bool skip_cast_if_equal_type); SPIRType binary_op_bitcast_helper(std::string &cast_op0, std::string &cast_op1, SPIRType::BaseType &input_type, uint32_t op0, uint32_t op1, bool skip_cast_if_equal_type); std::string to_ternary_expression(const SPIRType &result_type, uint32_t select, uint32_t true_value, uint32_t false_value); void emit_unary_op(uint32_t result_type, uint32_t result_id, uint32_t op0, const char *op); bool expression_is_forwarded(uint32_t id); SPIRExpression &emit_op(uint32_t result_type, uint32_t result_id, const std::string &rhs, bool forward_rhs, bool suppress_usage_tracking = false); std::string access_chain_internal(uint32_t base, const uint32_t *indices, uint32_t count, bool index_is_literal, bool chain_only = false, bool *need_transpose = nullptr, bool *result_is_packed = nullptr); std::string access_chain(uint32_t base, const uint32_t *indices, uint32_t count, const SPIRType &target_type, bool *need_transpose = nullptr, bool *result_is_packed = nullptr); std::string flattened_access_chain(uint32_t base, const uint32_t *indices, uint32_t count, const SPIRType &target_type, uint32_t offset, uint32_t matrix_stride, bool need_transpose); std::string flattened_access_chain_struct(uint32_t base, const uint32_t *indices, uint32_t count, const SPIRType &target_type, uint32_t offset); std::string flattened_access_chain_matrix(uint32_t base, const uint32_t *indices, uint32_t count, const SPIRType &target_type, uint32_t offset, uint32_t matrix_stride, bool need_transpose); std::string flattened_access_chain_vector(uint32_t base, const uint32_t *indices, uint32_t count, const SPIRType &target_type, uint32_t offset, uint32_t matrix_stride, bool need_transpose); std::pair flattened_access_chain_offset(const SPIRType &basetype, const uint32_t *indices, uint32_t count, uint32_t offset, uint32_t word_stride, bool *need_transpose = nullptr, uint32_t *matrix_stride = nullptr); const char *index_to_swizzle(uint32_t index); std::string remap_swizzle(const SPIRType &result_type, uint32_t input_components, const std::string &expr); std::string declare_temporary(uint32_t type, uint32_t id); void append_global_func_args(const SPIRFunction &func, uint32_t index, std::vector &arglist); std::string to_expression(uint32_t id); std::string to_enclosed_expression(uint32_t id); std::string to_unpacked_expression(uint32_t id); std::string to_enclosed_unpacked_expression(uint32_t id); std::string to_extract_component_expression(uint32_t id, uint32_t index); std::string enclose_expression(const std::string &expr); void strip_enclosed_expression(std::string &expr); std::string to_member_name(const SPIRType &type, uint32_t index); std::string type_to_glsl_constructor(const SPIRType &type); std::string argument_decl(const SPIRFunction::Parameter &arg); virtual std::string to_qualifiers_glsl(uint32_t id); const char *to_precision_qualifiers_glsl(uint32_t id); virtual const char *to_storage_qualifiers_glsl(const SPIRVariable &var); const char *flags_to_precision_qualifiers_glsl(const SPIRType &type, const Bitset &flags); const char *format_to_glsl(spv::ImageFormat format); virtual std::string layout_for_member(const SPIRType &type, uint32_t index); virtual std::string to_interpolation_qualifiers(const Bitset &flags); std::string layout_for_variable(const SPIRVariable &variable); std::string to_combined_image_sampler(uint32_t image_id, uint32_t samp_id); virtual bool skip_argument(uint32_t id) const; virtual void emit_array_copy(const std::string &lhs, uint32_t rhs_id); virtual void emit_block_hints(const SPIRBlock &block); virtual std::string to_initializer_expression(const SPIRVariable &var); bool buffer_is_packing_standard(const SPIRType &type, BufferPackingStandard packing, uint32_t start_offset = 0, uint32_t end_offset = ~(0u)); uint32_t type_to_packed_base_size(const SPIRType &type, BufferPackingStandard packing); uint32_t type_to_packed_alignment(const SPIRType &type, const Bitset &flags, BufferPackingStandard packing); uint32_t type_to_packed_array_stride(const SPIRType &type, const Bitset &flags, BufferPackingStandard packing); uint32_t type_to_packed_size(const SPIRType &type, const Bitset &flags, BufferPackingStandard packing); std::string bitcast_glsl(const SPIRType &result_type, uint32_t arg); virtual std::string bitcast_glsl_op(const SPIRType &result_type, const SPIRType &argument_type); std::string bitcast_expression(SPIRType::BaseType target_type, uint32_t arg); std::string bitcast_expression(const SPIRType &target_type, SPIRType::BaseType expr_type, const std::string &expr); std::string build_composite_combiner(uint32_t result_type, const uint32_t *elems, uint32_t length); bool remove_duplicate_swizzle(std::string &op); bool remove_unity_swizzle(uint32_t base, std::string &op); // Can modify flags to remote readonly/writeonly if image type // and force recompile. bool check_atomic_image(uint32_t id); virtual void replace_illegal_names(); virtual void emit_entry_point_declarations(); void replace_fragment_output(SPIRVariable &var); void replace_fragment_outputs(); bool check_explicit_lod_allowed(uint32_t lod); std::string legacy_tex_op(const std::string &op, const SPIRType &imgtype, uint32_t lod, uint32_t id); uint32_t indent = 0; std::unordered_set emitted_functions; std::unordered_set flattened_buffer_blocks; std::unordered_set flattened_structs; std::string load_flattened_struct(SPIRVariable &var); std::string to_flattened_struct_member(const SPIRVariable &var, uint32_t index); void store_flattened_struct(SPIRVariable &var, uint32_t value); // Usage tracking. If a temporary is used more than once, use the temporary instead to // avoid AST explosion when SPIRV is generated with pure SSA and doesn't write stuff to variables. std::unordered_map expression_usage_counts; void track_expression_read(uint32_t id); std::vector forced_extensions; std::vector header_lines; uint32_t statement_count; inline bool is_legacy() const { return (options.es && options.version < 300) || (!options.es && options.version < 130); } inline bool is_legacy_es() const { return options.es && options.version < 300; } inline bool is_legacy_desktop() const { return !options.es && options.version < 130; } bool args_will_forward(uint32_t id, const uint32_t *args, uint32_t num_args, bool pure); void register_call_out_argument(uint32_t id); void register_impure_function_call(); void register_control_dependent_expression(uint32_t expr); // GL_EXT_shader_pixel_local_storage support. std::vector pls_inputs; std::vector pls_outputs; std::string pls_decl(const PlsRemap &variable); const char *to_pls_qualifiers_glsl(const SPIRVariable &variable); void emit_pls(); void remap_pls_variables(); void add_variable(std::unordered_set &variables, uint32_t id); void add_variable(std::unordered_set &variables, std::string &name); void check_function_call_constraints(const uint32_t *args, uint32_t length); void handle_invalid_expression(uint32_t id); void find_static_extensions(); std::string emit_for_loop_initializers(const SPIRBlock &block); void emit_while_loop_initializers(const SPIRBlock &block); bool for_loop_initializers_are_same_type(const SPIRBlock &block); bool optimize_read_modify_write(const SPIRType &type, const std::string &lhs, const std::string &rhs); void fixup_image_load_store_access(); bool type_is_empty(const SPIRType &type); virtual void declare_undefined_values(); static std::string sanitize_underscores(const std::string &str); bool can_use_io_location(spv::StorageClass storage, bool block); const Instruction *get_next_instruction_in_block(const Instruction &instr); static uint32_t mask_relevant_memory_semantics(uint32_t semantics); std::string convert_half_to_string(const SPIRConstant &value, uint32_t col, uint32_t row); std::string convert_float_to_string(const SPIRConstant &value, uint32_t col, uint32_t row); std::string convert_double_to_string(const SPIRConstant &value, uint32_t col, uint32_t row); std::string convert_separate_image_to_combined(uint32_t id); // Builtins in GLSL are always specific signedness, but the SPIR-V can declare them // as either unsigned or signed. // Sometimes we will need to automatically perform bitcasts on load and store to make this work. virtual void bitcast_to_builtin_store(uint32_t target_id, std::string &expr, const SPIRType &expr_type); virtual void bitcast_from_builtin_load(uint32_t source_id, std::string &expr, const SPIRType &expr_type); private: void init() { if (source.known) { options.es = source.es; options.version = source.version; } } }; } // namespace spirv_cross #endif