/* * Copyright © 2010 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ #pragma once #ifndef GLSL_PARSER_EXTRAS_H #define GLSL_PARSER_EXTRAS_H /* * Most of the definitions here only apply to C++ */ #ifdef __cplusplus #include #include "glsl_symbol_table.h" struct gl_context; struct glsl_switch_state { /** Temporary variables needed for switch statement. */ ir_variable *test_var; ir_variable *is_fallthru_var; ir_variable *is_break_var; class ast_switch_statement *switch_nesting_ast; /** Table of constant values already used in case labels */ struct hash_table *labels_ht; class ast_case_label *previous_default; bool is_switch_innermost; // if switch stmt is closest to break, ... }; const char * glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version); typedef struct YYLTYPE { int first_line; int first_column; int last_line; int last_column; unsigned source; } YYLTYPE; # define YYLTYPE_IS_DECLARED 1 # define YYLTYPE_IS_TRIVIAL 1 extern void _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state, const char *fmt, ...); struct _mesa_glsl_parse_state { _mesa_glsl_parse_state(struct gl_context *_ctx, gl_shader_stage stage, void *mem_ctx); DECLARE_RALLOC_CXX_OPERATORS(_mesa_glsl_parse_state); /** * Generate a string representing the GLSL version currently being compiled * (useful for error messages). */ const char *get_version_string() { return glsl_compute_version_string(this, this->es_shader, this->language_version); } /** * Determine whether the current GLSL version is sufficiently high to * support a certain feature. * * \param required_glsl_version is the desktop GLSL version that is * required to support the feature, or 0 if no version of desktop GLSL * supports the feature. * * \param required_glsl_es_version is the GLSL ES version that is required * to support the feature, or 0 if no version of GLSL ES suports the * feature. */ bool is_version(unsigned required_glsl_version, unsigned required_glsl_es_version) const { unsigned required_version = this->es_shader ? required_glsl_es_version : required_glsl_version; return required_version != 0 && this->language_version >= required_version; } bool check_version(unsigned required_glsl_version, unsigned required_glsl_es_version, YYLTYPE *locp, const char *fmt, ...) PRINTFLIKE(5, 6); bool check_precision_qualifiers_allowed(YYLTYPE *locp) { return check_version(130, 100, locp, "precision qualifiers are forbidden"); } bool check_bitwise_operations_allowed(YYLTYPE *locp) { return check_version(130, 300, locp, "bit-wise operations are forbidden"); } bool check_explicit_attrib_location_allowed(YYLTYPE *locp, const ir_variable *var) { if (!this->has_explicit_attrib_location()) { const char *const requirement = this->es_shader ? "GLSL ES 300" : "GL_ARB_explicit_attrib_location extension or GLSL 330"; _mesa_glsl_error(locp, this, "%s explicit location requires %s", mode_string(var), requirement); return false; } return true; } bool check_separate_shader_objects_allowed(YYLTYPE *locp, const ir_variable *var) { if (!this->has_separate_shader_objects()) { const char *const requirement = this->es_shader ? "GL_EXT_separate_shader_objects extension" : "GL_ARB_separate_shader_objects extension or GLSL 420"; _mesa_glsl_error(locp, this, "%s explicit location requires %s", mode_string(var), requirement); return false; } return true; } bool has_explicit_attrib_location() const { return ARB_explicit_attrib_location_enable || is_version(330, 300); } bool has_uniform_buffer_objects() const { return ARB_uniform_buffer_object_enable || is_version(140, 300); } bool has_separate_shader_objects() const { return ARB_separate_shader_objects_enable || is_version(410, 0) || EXT_separate_shader_objects_enable; } void process_version_directive(YYLTYPE *locp, int version, const char *ident); struct gl_context *const ctx; void *scanner; exec_list translation_unit; glsl_symbol_table *symbols; unsigned num_supported_versions; struct { unsigned ver; bool es; } supported_versions[12]; bool es_shader; unsigned language_version; gl_shader_stage stage; /** * Number of nested struct_specifier levels * * Outside a struct_specifier, this is zero. */ unsigned struct_specifier_depth; /** * Default uniform layout qualifiers tracked during parsing. * Currently affects uniform blocks and uniform buffer variables in * those blocks. */ struct ast_type_qualifier *default_uniform_qualifier; /** * Variables to track different cases if a fragment shader redeclares * built-in variable gl_FragCoord. * * Note: These values are computed at ast_to_hir time rather than at parse * time. */ bool fs_redeclares_gl_fragcoord; bool fs_origin_upper_left; bool fs_pixel_center_integer; bool fs_redeclares_gl_fragcoord_with_no_layout_qualifiers; /** * True if a geometry shader input primitive type was specified using a * layout directive. * * Note: this value is computed at ast_to_hir time rather than at parse * time. */ bool gs_input_prim_type_specified; /** Input layout qualifiers from GLSL 1.50. (geometry shader controls)*/ struct ast_type_qualifier *in_qualifier; /** * True if a compute shader input local size was specified using a layout * directive. * * Note: this value is computed at ast_to_hir time rather than at parse * time. */ bool cs_input_local_size_specified; /** * If cs_input_local_size_specified is true, the local size that was * specified. Otherwise ignored. */ unsigned cs_input_local_size[3]; /** Output layout qualifiers from GLSL 1.50. (geometry shader controls)*/ struct ast_type_qualifier *out_qualifier; /** * Printable list of GLSL versions supported by the current context * * \note * This string should probably be generated per-context instead of per * invokation of the compiler. This should be changed when the method of * tracking supported GLSL versions changes. */ const char *supported_version_string; /** * Implementation defined limits that affect built-in variables, etc. * * \sa struct gl_constants (in mtypes.h) */ struct { /* 1.10 */ unsigned MaxLights; unsigned MaxClipPlanes; unsigned MaxTextureUnits; unsigned MaxTextureCoords; unsigned MaxVertexAttribs; unsigned MaxVertexUniformComponents; unsigned MaxVertexTextureImageUnits; unsigned MaxCombinedTextureImageUnits; unsigned MaxTextureImageUnits; unsigned MaxFragmentUniformComponents; /* ARB_draw_buffers */ unsigned MaxDrawBuffers; /* 3.00 ES */ int MinProgramTexelOffset; int MaxProgramTexelOffset; /* 1.50 */ unsigned MaxVertexOutputComponents; unsigned MaxGeometryInputComponents; unsigned MaxGeometryOutputComponents; unsigned MaxFragmentInputComponents; unsigned MaxGeometryTextureImageUnits; unsigned MaxGeometryOutputVertices; unsigned MaxGeometryTotalOutputComponents; unsigned MaxGeometryUniformComponents; /* ARB_shader_atomic_counters */ unsigned MaxVertexAtomicCounters; unsigned MaxGeometryAtomicCounters; unsigned MaxFragmentAtomicCounters; unsigned MaxCombinedAtomicCounters; unsigned MaxAtomicBufferBindings; /* ARB_compute_shader */ unsigned MaxComputeWorkGroupCount[3]; unsigned MaxComputeWorkGroupSize[3]; /* ARB_shader_image_load_store */ unsigned MaxImageUnits; unsigned MaxCombinedImageUnitsAndFragmentOutputs; unsigned MaxImageSamples; unsigned MaxVertexImageUniforms; unsigned MaxGeometryImageUniforms; unsigned MaxFragmentImageUniforms; unsigned MaxCombinedImageUniforms; } Const; /** * During AST to IR conversion, pointer to current IR function * * Will be \c NULL whenever the AST to IR conversion is not inside a * function definition. */ class ir_function_signature *current_function; /** * During AST to IR conversion, pointer to the toplevel IR * instruction list being generated. */ exec_list *toplevel_ir; /** Have we found a return statement in this function? */ bool found_return; /** Was there an error during compilation? */ bool error; /** * Are all shader inputs / outputs invariant? * * This is set when the 'STDGL invariant(all)' pragma is used. */ bool all_invariant; /** Loop or switch statement containing the current instructions. */ class ast_iteration_statement *loop_nesting_ast; struct glsl_switch_state switch_state; /** List of structures defined in user code. */ const glsl_type **user_structures; unsigned num_user_structures; char *info_log; /** * \name Enable bits for GLSL extensions */ /*@{*/ /* ARB extensions go here, sorted alphabetically. */ bool ARB_arrays_of_arrays_enable; bool ARB_arrays_of_arrays_warn; bool ARB_compute_shader_enable; bool ARB_compute_shader_warn; bool ARB_conservative_depth_enable; bool ARB_conservative_depth_warn; bool ARB_draw_buffers_enable; bool ARB_draw_buffers_warn; bool ARB_draw_instanced_enable; bool ARB_draw_instanced_warn; bool ARB_explicit_attrib_location_enable; bool ARB_explicit_attrib_location_warn; bool ARB_fragment_coord_conventions_enable; bool ARB_fragment_coord_conventions_warn; bool ARB_gpu_shader5_enable; bool ARB_gpu_shader5_warn; bool ARB_sample_shading_enable; bool ARB_sample_shading_warn; bool ARB_separate_shader_objects_enable; bool ARB_separate_shader_objects_warn; bool ARB_shader_atomic_counters_enable; bool ARB_shader_atomic_counters_warn; bool ARB_shader_bit_encoding_enable; bool ARB_shader_bit_encoding_warn; bool ARB_shader_image_load_store_enable; bool ARB_shader_image_load_store_warn; bool ARB_shader_stencil_export_enable; bool ARB_shader_stencil_export_warn; bool ARB_shader_texture_lod_enable; bool ARB_shader_texture_lod_warn; bool ARB_shading_language_420pack_enable; bool ARB_shading_language_420pack_warn; bool ARB_shading_language_packing_enable; bool ARB_shading_language_packing_warn; bool ARB_texture_cube_map_array_enable; bool ARB_texture_cube_map_array_warn; bool ARB_texture_gather_enable; bool ARB_texture_gather_warn; bool ARB_texture_multisample_enable; bool ARB_texture_multisample_warn; bool ARB_texture_query_levels_enable; bool ARB_texture_query_levels_warn; bool ARB_texture_query_lod_enable; bool ARB_texture_query_lod_warn; bool ARB_texture_rectangle_enable; bool ARB_texture_rectangle_warn; bool ARB_uniform_buffer_object_enable; bool ARB_uniform_buffer_object_warn; bool ARB_viewport_array_enable; bool ARB_viewport_array_warn; /* KHR extensions go here, sorted alphabetically. */ /* OES extensions go here, sorted alphabetically. */ bool OES_EGL_image_external_enable; bool OES_EGL_image_external_warn; bool OES_standard_derivatives_enable; bool OES_standard_derivatives_warn; bool OES_texture_3D_enable; bool OES_texture_3D_warn; /* All other extensions go here, sorted alphabetically. */ bool AMD_conservative_depth_enable; bool AMD_conservative_depth_warn; bool AMD_shader_stencil_export_enable; bool AMD_shader_stencil_export_warn; bool AMD_shader_trinary_minmax_enable; bool AMD_shader_trinary_minmax_warn; bool AMD_vertex_shader_layer_enable; bool AMD_vertex_shader_layer_warn; bool EXT_separate_shader_objects_enable; bool EXT_separate_shader_objects_warn; bool EXT_shader_integer_mix_enable; bool EXT_shader_integer_mix_warn; bool EXT_texture_array_enable; bool EXT_texture_array_warn; /*@}*/ /** Extensions supported by the OpenGL implementation. */ const struct gl_extensions *extensions; bool uses_builtin_functions; bool fs_uses_gl_fragcoord; /** * For geometry shaders, size of the most recently seen input declaration * that was a sized array, or 0 if no sized input array declarations have * been seen. * * Unused for other shader types. */ unsigned gs_input_size; bool early_fragment_tests; /** Atomic counter offsets by binding */ unsigned atomic_counter_offsets[MAX_COMBINED_ATOMIC_BUFFERS]; }; # define YYLLOC_DEFAULT(Current, Rhs, N) \ do { \ if (N) \ { \ (Current).first_line = YYRHSLOC(Rhs, 1).first_line; \ (Current).first_column = YYRHSLOC(Rhs, 1).first_column; \ (Current).last_line = YYRHSLOC(Rhs, N).last_line; \ (Current).last_column = YYRHSLOC(Rhs, N).last_column; \ } \ else \ { \ (Current).first_line = (Current).last_line = \ YYRHSLOC(Rhs, 0).last_line; \ (Current).first_column = (Current).last_column = \ YYRHSLOC(Rhs, 0).last_column; \ } \ (Current).source = 0; \ } while (0) /** * Emit a warning to the shader log * * \sa _mesa_glsl_error */ extern void _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state, const char *fmt, ...); extern void _mesa_glsl_lexer_ctor(struct _mesa_glsl_parse_state *state, const char *string); extern void _mesa_glsl_lexer_dtor(struct _mesa_glsl_parse_state *state); union YYSTYPE; extern int _mesa_glsl_lexer_lex(union YYSTYPE *yylval, YYLTYPE *yylloc, void *scanner); extern int _mesa_glsl_parse(struct _mesa_glsl_parse_state *); /** * Process elements of the #extension directive * * \return * If \c name and \c behavior are valid, \c true is returned. Otherwise * \c false is returned. */ extern bool _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp, const char *behavior, YYLTYPE *behavior_locp, _mesa_glsl_parse_state *state); #endif /* __cplusplus */ /* * These definitions apply to C and C++ */ #ifdef __cplusplus extern "C" { #endif /** * Get the textual name of the specified shader stage (which is a * gl_shader_stage). */ extern const char * _mesa_shader_stage_to_string(unsigned stage); extern int glcpp_preprocess(void *ctx, const char **shader, char **info_log, const struct gl_extensions *extensions, struct gl_context *gl_ctx); extern void _mesa_destroy_shader_compiler(void); extern void _mesa_destroy_shader_compiler_caches(void); #ifdef __cplusplus } #endif #endif /* GLSL_PARSER_EXTRAS_H */