diff options
Diffstat (limited to 'src/mesa/shader/slang')
| -rw-r--r-- | src/mesa/shader/slang/slang_compile.c | 34 | ||||
| -rw-r--r-- | src/mesa/shader/slang/slang_preprocess.c | 1098 | ||||
| -rw-r--r-- | src/mesa/shader/slang/slang_preprocess.h | 5 | ||||
| -rw-r--r-- | src/mesa/shader/slang/slang_utility.c | 95 | ||||
| -rw-r--r-- | src/mesa/shader/slang/slang_utility.h | 38 |
5 files changed, 1253 insertions, 17 deletions
diff --git a/src/mesa/shader/slang/slang_compile.c b/src/mesa/shader/slang/slang_compile.c index 46bdf830f92..357d61b246a 100644 --- a/src/mesa/shader/slang/slang_compile.c +++ b/src/mesa/shader/slang/slang_compile.c @@ -1,6 +1,6 @@ /* * Mesa 3-D graphics library - * Version: 6.5 + * Version: 6.6 * * Copyright (C) 2005-2006 Brian Paul All Rights Reserved. * @@ -1918,10 +1918,11 @@ static GLboolean compile_with_grammar (grammar id, const char *source, slang_code_unit *unit, slang_unit_type type, slang_info_log *infolog, slang_code_unit *builtin) { - byte *prod; + byte *prod; GLuint size, start, version; + slang_string preprocessed; - /* retrieve version */ + /* First retrieve the version number. */ if (!_slang_preprocess_version (source, &version, &start, infolog)) return GL_FALSE; @@ -1930,22 +1931,31 @@ compile_with_grammar (grammar id, const char *source, slang_code_unit *unit, sla return GL_FALSE; } - /* check the syntax and generate its binary representation */ - if (!grammar_fast_check (id, (const byte *) source + start, &prod, &size, 65536)) - { - char buf[1024]; - unsigned int pos; - grammar_get_last_error ( (unsigned char*) buf, 1024, (int*) &pos); + /* Now preprocess the source string. */ + slang_string_init (&preprocessed); + if (!_slang_preprocess_directives (&preprocessed, &source[start], infolog)) { + slang_string_free (&preprocessed); + slang_info_log_error (infolog, "failed to preprocess the source."); + return GL_FALSE; + } + + /* Finally check the syntax and generate its binary representation. */ + if (!grammar_fast_check (id, (const byte *) (slang_string_cstr (&preprocessed)), &prod, &size, 65536)) { + char buf[1024]; + GLint pos; + + slang_string_free (&preprocessed); + grammar_get_last_error ((byte *) (buf), sizeof (buf), &pos); slang_info_log_error (infolog, buf); return GL_FALSE; - } + } + slang_string_free (&preprocessed); - /* syntax is okay - translate it to internal representation */ + /* Syntax is okay - translate it to internal representation. */ if (!compile_binary (prod, unit, type, infolog, builtin, &builtin[SLANG_BUILTIN_TOTAL - 1])) { grammar_alloc_free (prod); return GL_FALSE; } - grammar_alloc_free (prod); return GL_TRUE; } diff --git a/src/mesa/shader/slang/slang_preprocess.c b/src/mesa/shader/slang/slang_preprocess.c index bd9ff9002e9..43aa9a1e95e 100644 --- a/src/mesa/shader/slang/slang_preprocess.c +++ b/src/mesa/shader/slang/slang_preprocess.c @@ -1,6 +1,6 @@ /* * Mesa 3-D graphics library - * Version: 6.5 + * Version: 6.6 * * Copyright (C) 2005-2006 Brian Paul All Rights Reserved. * @@ -32,6 +32,14 @@ #include "grammar_mesa.h" #include "slang_preprocess.h" +static const char *slang_pp_directives_syn = +#include "library/slang_pp_directives_syn.h" +; + +static const char *slang_pp_expression_syn = +#include "library/slang_pp_expression_syn.h" +; + static const char *slang_pp_version_syn = #include "library/slang_pp_version_syn.h" ; @@ -40,7 +48,7 @@ static GLvoid grammar_error_to_log (slang_info_log *log) { char buf[1024]; - int pos; + GLint pos; grammar_get_last_error ((byte *) (buf), sizeof (buf), &pos); slang_info_log_error (log, buf); @@ -75,3 +83,1089 @@ _slang_preprocess_version (const char *text, GLuint *version, GLuint *eaten, sla return GL_TRUE; } +/* + * The preprocessor does the following work. + * 1. Remove comments. Each comment block is replaced with a single space and if the + * block contains new-lines, they are preserved. This ensures that line numbers + * stay the same and if a comment block delimits two tokens, the are delitmited + * by the space after comment removal. + * 2. Remove preprocessor directives from the source string, checking their syntax and + * executing them if appropriate. Again, new-lines are preserved. + * 3. Expand macros. + * 4. Tokenize the source string by ensuring there is at least one space between every + * two adjacent tokens. + */ + +#define PP_ANNOTATE 0 + +static GLvoid +pp_annotate (slang_string *output, const char *fmt, ...) +{ +#if PP_ANNOTATE + va_list va; + char buffer[1024]; + + va_start (va, fmt); + _mesa_vsprintf (buffer, fmt, va); + va_end (va); + slang_string_pushs (output, buffer, _mesa_strlen (buffer)); +#else + (GLvoid) (output); + (GLvoid) (fmt); +#endif +} + + /* + * The expression is executed on a fixed-sized stack. The PUSH macro makes a runtime + * check if the stack is not overflown by too complex expressions. In that situation the + * GLSL preprocessor should report internal compiler error. + * The BINARYDIV makes a runtime check if the divider is not 0. If it is, it reports + * compilation error. + */ + +#define EXECUTION_STACK_SIZE 1024 + +#define PUSH(x)\ + do {\ + if (sp == 0) {\ + slang_info_log_error (elog, "internal compiler error: preprocessor execution stack overflow.");\ + return GL_FALSE;\ + }\ + stack[--sp] = x;\ + } while (GL_FALSE) + +#define POP(x)\ + do {\ + assert (sp < EXECUTION_STACK_SIZE);\ + x = stack[sp++];\ + } while (GL_FALSE) + +#define BINARY(op)\ + do {\ + GLint a, b;\ + POP(b);\ + POP(a);\ + PUSH(a op b);\ + } while (GL_FALSE) + +#define BINARYDIV(op)\ + do {\ + GLint a, b;\ + POP(b);\ + POP(a);\ + if (b == 0) {\ + slang_info_log_error (elog, "division by zero in preprocessor expression.");\ + return GL_FALSE;\ + }\ + PUSH(a op b);\ + } while (GL_FALSE) + +#define UNARY(op)\ + do {\ + GLint a;\ + POP(a);\ + PUSH(op a);\ + } while (GL_FALSE) + +#define OP_END 0 +#define OP_PUSHINT 1 +#define OP_LOGICALOR 2 +#define OP_LOGICALAND 3 +#define OP_OR 4 +#define OP_XOR 5 +#define OP_AND 6 +#define OP_EQUAL 7 +#define OP_NOTEQUAL 8 +#define OP_LESSEQUAL 9 +#define OP_GREATEREQUAL 10 +#define OP_LESS 11 +#define OP_GREATER 12 +#define OP_LEFTSHIFT 13 +#define OP_RIGHTSHIFT 14 +#define OP_ADD 15 +#define OP_SUBTRACT 16 +#define OP_MULTIPLY 17 +#define OP_DIVIDE 18 +#define OP_MODULUS 19 +#define OP_PLUS 20 +#define OP_MINUS 21 +#define OP_NEGATE 22 +#define OP_COMPLEMENT 23 + +static GLboolean +execute_expression (slang_string *output, const byte *code, GLuint *pi, GLint *result, + slang_info_log *elog) +{ + GLuint i = *pi; + GLint stack[EXECUTION_STACK_SIZE]; + GLuint sp = EXECUTION_STACK_SIZE; + + while (code[i] != OP_END) { + switch (code[i++]) { + case OP_PUSHINT: + i++; + PUSH(_mesa_atoi ((const char *) (&code[i]))); + i += _mesa_strlen ((const char *) (&code[i])) + 1; + break; + case OP_LOGICALOR: + BINARY(||); + break; + case OP_LOGICALAND: + BINARY(&&); + break; + case OP_OR: + BINARY(|); + break; + case OP_XOR: + BINARY(^); + break; + case OP_AND: + BINARY(&); + break; + case OP_EQUAL: + BINARY(==); + break; + case OP_NOTEQUAL: + BINARY(!=); + break; + case OP_LESSEQUAL: + BINARY(<=); + break; + case OP_GREATEREQUAL: + BINARY(>=); + break; + case OP_LESS: + BINARY(<); + break; + case OP_GREATER: + BINARY(>); + break; + case OP_LEFTSHIFT: + BINARY(<<); + break; + case OP_RIGHTSHIFT: + BINARY(>>); + break; + case OP_ADD: + BINARY(+); + break; + case OP_SUBTRACT: + BINARY(-); + break; + case OP_MULTIPLY: + BINARY(*); + break; + case OP_DIVIDE: + BINARYDIV(/); + break; + case OP_MODULUS: + BINARYDIV(%); + break; + case OP_PLUS: + UNARY(+); + break; + case OP_MINUS: + UNARY(-); + break; + case OP_NEGATE: + UNARY(!); + break; + case OP_COMPLEMENT: + UNARY(~); + break; + default: + assert (0); + } + } + + /* Write-back the index skipping the OP_END. */ + *pi = i + 1; + + /* There should be exactly one value left on the stack. This is our result. */ + POP(*result); + pp_annotate (output, "%d ", *result); + assert (sp == EXECUTION_STACK_SIZE); + return GL_TRUE; +} + +/* + * Function execute_expressions() executes up to 2 expressions. The second expression is there + * for the #line directive which takes 1 or 2 expressions that indicate line and file numbers. + * If it fails, it returns 0. If it succeeds, it returns the number of executed expressions. + */ + +#define EXP_END 0 +#define EXP_EXPRESSION 1 + +static GLuint +execute_expressions (slang_string *output, grammar eid, const byte *expr, GLint results[2], + slang_info_log *elog) +{ + GLint success; + byte *code; + GLuint size, count = 0; + + success = grammar_fast_check (eid, expr, &code, &size, 64); + if (success) { + GLuint i = 0; + + while (code[i++] == EXP_EXPRESSION) { + assert (count < 2); + + if (!execute_expression (output, code, &i, &results[count], elog)) { + count = 0; + break; + } + count++; + } + grammar_alloc_free (code); + } + else { + slang_info_log_error (elog, "syntax error in preprocessor expression.");\ + } + return count; +} + +/* + * The pp_symbol structure is used to hold macro definitions and macro formal parameters. The + * pp_symbols strcture is a collection of pp_symbol. It is used both for storing macro formal + * parameters and all global macro definitions. Making this unification wastes some memory, + * becuse macro formal parameters don't need further lists of symbols. We lose 8 bytes per + * formal parameter here, but making this we can use the same code to substitute macro parameters + * as well as macros in the source string. + */ + +typedef struct +{ + struct pp_symbol_ *symbols; + GLuint count; +} pp_symbols; + +static GLvoid +pp_symbols_init (pp_symbols *self) +{ + self->symbols = NULL; + self->count = 0; +} + +static GLvoid +pp_symbols_free (pp_symbols *); + +typedef struct pp_symbol_ +{ + slang_string name; + slang_string replacement; + pp_symbols parameters; +} pp_symbol; + +static GLvoid +pp_symbol_init (pp_symbol *self) +{ + slang_string_init (&self->name); + slang_string_init (&self->replacement); + pp_symbols_init (&self->parameters); +} + +static GLvoid +pp_symbol_free (pp_symbol *self) +{ + slang_string_free (&self->name); + slang_string_free (&self->replacement); + pp_symbols_free (&self->parameters); +} + +static GLvoid +pp_symbol_reset (pp_symbol *self) +{ + /* Leave symbol name intact. */ + slang_string_reset (&self->replacement); + pp_symbols_free (&self->parameters); + pp_symbols_init (&self->parameters); +} + +static GLvoid +pp_symbols_free (pp_symbols *self) +{ + GLuint i; + + for (i = 0; i < self->count; i++) + pp_symbol_free (&self->symbols[i]); + _mesa_free (self->symbols); +} + +static pp_symbol * +pp_symbols_push (pp_symbols *self) +{ + self->symbols = (pp_symbol *) (_mesa_realloc (self->symbols, self->count * sizeof (pp_symbol), + (self->count + 1) * sizeof (pp_symbol))); + if (self->symbols == NULL) + return NULL; + pp_symbol_init (&self->symbols[self->count]); + return &self->symbols[self->count++]; +} + +static GLboolean +pp_symbols_erase (pp_symbols *self, pp_symbol *symbol) +{ + assert (symbol >= self->symbols && symbol < self->symbols + self->count); + + self->count--; + pp_symbol_free (symbol); + if (symbol < self->symbols + self->count) + _mesa_memcpy (symbol, symbol + 1, sizeof (pp_symbol) * (self->symbols + self->count - symbol)); + self->symbols = (pp_symbol *) (_mesa_realloc (self->symbols, (self->count + 1) * sizeof (pp_symbol), + self->count * sizeof (pp_symbol))); + return self->symbols != NULL; +} + +static pp_symbol * +pp_symbols_find (pp_symbols *self, const char *name) +{ + GLuint i; + + for (i = 0; i < self->count; i++) + if (_mesa_strcmp (name, slang_string_cstr (&self->symbols[i].name)) == 0) + return &self->symbols[i]; + return NULL; +} + +/* + * The condition context of a single #if/#else/#endif level. Those can be nested, so there + * is a stack of condition contexts. + * There is a special global context on the bottom of the stack. It is there to simplify + * context handling. + */ + +typedef struct +{ + GLboolean current; /* The condition value of this level. */ + GLboolean effective; /* The effective product of current condition, outer level conditions + * and position within #if-#else-#endif sections. */ + GLboolean else_allowed; /* TRUE if in #if-#else section, FALSE if in #else-#endif section + * and for global context. */ + GLboolean endif_required; /* FALSE for global context only. */ +} pp_cond_ctx; + +/* Should be enuff. */ +#define CONDITION_STACK_SIZE 64 + +typedef struct +{ + pp_cond_ctx stack[CONDITION_STACK_SIZE]; + pp_cond_ctx *top; +} pp_cond_stack; + +static GLboolean +pp_cond_stack_push (pp_cond_stack *self, slang_info_log *elog) +{ + if (self->top == self->stack) { + slang_info_log_error (elog, "internal compiler error: preprocessor condition stack overflow."); + return GL_FALSE; + } + self->top--; + return GL_TRUE; +} + +static GLvoid +pp_cond_stack_reevaluate (pp_cond_stack *self) +{ + /* There must be at least 2 conditions on the stack - one global and one being evaluated. */ + assert (self->top <= &self->stack[CONDITION_STACK_SIZE - 2]); + + self->top->effective = self->top->current && self->top[1].effective; +} + +/* + * Extension enables through #extension directive. + * NOTE: Currently, only enable/disable state is stored. + */ + +typedef struct +{ + GLboolean MESA_shader_debug; /* GL_MESA_shader_debug enable */ +} pp_ext; + +/* + * Disable all extensions. Called at startup and on #extension all: disable. + */ +static GLvoid +pp_ext_disable_all (pp_ext *self) +{ + self->MESA_shader_debug = GL_FALSE; +} + +static GLvoid +pp_ext_init (pp_ext *self) +{ + pp_ext_disable_all (self); + /* Other initialization code goes here. */ +} + +static GLboolean +pp_ext_set (pp_ext *self, const char *name, GLboolean enable) +{ + if (_mesa_strcmp (name, "MESA_shader_debug") == 0) + self->MESA_shader_debug = enable; + /* Next extension name tests go here. */ + else + return GL_FALSE; + return GL_TRUE; +} + +/* + * The state of preprocessor: current line, file and version number, list of all defined macros + * and the #if/#endif context. + */ + +typedef struct +{ + GLint line; + GLint file; + GLint version; + pp_symbols symbols; + pp_ext ext; + slang_info_log *elog; + pp_cond_stack cond; +} pp_state; + +static GLvoid +pp_state_init (pp_state *self, slang_info_log *elog) +{ + self->line = 0; + self->file = 1; + self->version = 110; + pp_symbols_init (&self->symbols); + pp_ext_init (&self->ext); + self->elog = elog; + + /* Initialize condition stack and create the global context. */ + self->cond.top = &self->cond.stack[CONDITION_STACK_SIZE - 1]; + self->cond.top->current = GL_TRUE; + self->cond.top->effective = GL_TRUE; + self->cond.top->else_allowed = GL_FALSE; + self->cond.top->endif_required = GL_FALSE; +} + +static GLvoid +pp_state_free (pp_state *self) +{ + pp_symbols_free (&self->symbols); +} + +#define IS_FIRST_ID_CHAR(x) (((x) >= 'a' && (x) <= 'z') || ((x) >= 'A' && (x) <= 'Z') || (x) == '_') +#define IS_NEXT_ID_CHAR(x) (IS_FIRST_ID_CHAR(x) || ((x) >= '0' && (x) <= '9')) +#define IS_WHITE(x) ((x) == ' ' || (x) == '\n') +#define IS_NULL(x) ((x) == '\0') + +#define SKIP_WHITE(x) do { while (IS_WHITE(*(x))) (x)++; } while (GL_FALSE) + +typedef struct +{ + slang_string *output; + const char *input; + pp_state *state; +} expand_state; + +static GLboolean +expand_defined (expand_state *e, slang_string *buffer) +{ + GLboolean in_paren = GL_FALSE; + const char *id; + + /* Parse the optional opening parenthesis. */ + SKIP_WHITE(e->input); + if (*e->input == '(') { + e->input++; + in_paren = GL_TRUE; + SKIP_WHITE(e->input); + } + + /* Parse operand. */ + if (!IS_FIRST_ID_CHAR(*e->input)) { + slang_info_log_error (e->state->elog, + "preprocess error: identifier expected after operator 'defined'."); + return GL_FALSE; + } + slang_string_reset (buffer); + slang_string_pushc (buffer, *e->input++); + while (IS_NEXT_ID_CHAR(*e->input)) + slang_string_pushc (buffer, *e->input++); + id = slang_string_cstr (buffer); + + /* Check if the operand is defined. Output 1 if it is defined, output 0 if not. */ + if (pp_symbols_find (&e->state->symbols, id) == NULL) + slang_string_pushs (e->output, " 0 ", 3); + else + slang_string_pushs (e->output, " 1 ", 3); + + /* Parse the closing parentehesis if the opening one was there. */ + if (in_paren) { + SKIP_WHITE(e->input); + if (*e->input != ')') { + slang_info_log_error (e->state->elog, "preprocess error: ')' expected."); + return GL_FALSE; + } + e->input++; + SKIP_WHITE(e->input); + } + return GL_TRUE; +} + +static GLboolean +expand (expand_state *, pp_symbols *); + +static GLboolean +expand_symbol (expand_state *e, pp_symbol *symbol) +{ + expand_state es; + + /* If the macro has some parameters, we need to parse them. */ + if (symbol->parameters.count != 0) { + GLuint i; + + /* Parse the opening parenthesis. */ + SKIP_WHITE(e->input); + if (*e->input != '(') { + slang_info_log_error (e->state->elog, "preprocess error: '(' expected."); + return GL_FALSE; + } + e->input++; + SKIP_WHITE(e->input); + + /* Parse macro actual parameters. This can be anything, separated by a colon. + * TODO: What about nested/grouped parameters by parenthesis? */ + for (i = 0; i < symbol->parameters.count; i++) { + if (*e->input == ')') { + slang_info_log_error (e->state->elog, "preprocess error: unexpected ')'."); + return GL_FALSE; + } + + /* Eat all characters up to the comma or closing parentheses. */ + pp_symbol_reset (&symbol->parameters.symbols[i]); + while (!IS_NULL(*e->input) && *e->input != ',' && *e->input != ')') + slang_string_pushc (&symbol->parameters.symbols[i].replacement, *e->input++); + + /* If it was not the last paremeter, skip the comma. Otherwise, skip the + * closing parentheses. */ + if (i + 1 == symbol->parameters.count) { + /* This is the last paremeter - skip the closing parentheses. */ + if (*e->input != ')') { + slang_info_log_error (e->state->elog, "preprocess error: ')' expected."); + return GL_FALSE; + } + e->input++; + SKIP_WHITE(e->input); + } + else { + /* Skip the separating comma. */ + if (*e->input != ',') { + slang_info_log_error (e->state->elog, "preprocess error: ',' expected."); + return GL_FALSE; + } + e->input++; + SKIP_WHITE(e->input); + } + } + } + + /* Expand the macro. Use its parameters as a priority symbol list to expand + * macro parameters correctly. */ + es.output = e->output; + es.input = slang_string_cstr (&symbol->replacement); + es.state = e->state; + slang_string_pushc (e->output, ' '); + if (!expand (&es, &symbol->parameters)) + return GL_FALSE; + slang_string_pushc (e->output, ' '); + return GL_TRUE; +} + +/* + * Function expand() expands source text from <input> to <output>. The expansion is made using + * the list passed in <symbols> parameter. It allows us to expand macro formal parameters with + * actual parameters. The global list of symbols from pp state is used when doing a recursive + * call of expand(). + */ + +static GLboolean +expand (expand_state *e, pp_symbols *symbols) +{ + while (!IS_NULL(*e->input)) { + if (IS_FIRST_ID_CHAR(*e->input)) { + slang_string buffer; + const char *id; + + /* Parse the identifier. */ + slang_string_init (&buffer); + slang_string_pushc (&buffer, *e->input++); + while (IS_NEXT_ID_CHAR(*e->input)) + slang_string_pushc (&buffer, *e->input++); + id = slang_string_cstr (&buffer); + + /* Now check if the identifier is special in some way. The "defined" identifier is + * actually an operator that we must handle here and expand it either to " 0 " or " 1 ". + * The other identifiers start with "__" and we expand it to appropriate values + * taken from the preprocessor state. */ + if (_mesa_strcmp (id, "defined") == 0) { + if (!expand_defined (e, &buffer)) + return GL_FALSE; + } + else if (_mesa_strcmp (id, "__LINE__") == 0) { + slang_string_pushc (e->output, ' '); + slang_string_pushi (e->output, e->state->line); + slang_string_pushc (e->output, ' '); + } + else if (_mesa_strcmp (id, "__FILE__") == 0) { + slang_string_pushc (e->output, ' '); + slang_string_pushi (e->output, e->state->file); + slang_string_pushc (e->output, ' '); + } + else if (_mesa_strcmp (id, "__VERSION__") == 0) { + slang_string_pushc (e->output, ' '); + slang_string_pushi (e->output, e->state->version); + slang_string_pushc (e->output, ' '); + } + else { + pp_symbol *symbol; + + /* The list of symbols from <symbols> take precedence over the list from <state>. + * Note that in some cases this is the same list so avoid double look-up. */ + symbol = pp_symbols_find (symbols, id); + if (symbol == NULL && symbols != &e->state->symbols) + symbol = pp_symbols_find (&e->state->symbols, id); + + /* If the symbol was found, recursively expand its definition. */ + if (symbol != NULL) { + if (!expand_symbol (e, symbol)) { + slang_string_free (&buffer); + return GL_FALSE; + } + } + else { + slang_string_push (e->output, &buffer); + } + } + slang_string_free (&buffer); + } + else if (IS_WHITE(*e->input)) { + slang_string_pushc (e->output, *e->input++); + } + else { + while (!IS_WHITE(*e->input) && !IS_NULL(*e->input) && !IS_FIRST_ID_CHAR(*e->input)) + slang_string_pushc (e->output, *e->input++); + } + } + return GL_TRUE; +} + +static GLboolean +parse_if (slang_string *output, const byte *prod, GLuint *pi, GLint *result, pp_state *state, + grammar eid) +{ + const char *text; + GLuint len; + + text = (const char *) (&prod[*pi]); + len = _mesa_strlen (text); + + if (state->cond.top->effective) { + slang_string expr; + GLuint count; + GLint results[2]; + expand_state es; + + /* Expand the expression. */ + slang_string_init (&expr); + es.output = &expr; + es.input = text; + es.state = state; + if (!expand (&es, &state->symbols)) + return GL_FALSE; + + /* Execute the expression. */ + count = execute_expressions (output, eid, (const byte *) (slang_string_cstr (&expr)), + results, state->elog); + slang_string_free (&expr); + if (count != 1) + return GL_FALSE; + *result = results[0]; + } + else { + /* The directive is dead. */ + *result = 0; + } + + *pi += len + 1; + return GL_TRUE; +} + +#define ESCAPE_TOKEN 0 + +#define TOKEN_END 0 +#define TOKEN_DEFINE 1 +#define TOKEN_UNDEF 2 +#define TOKEN_IF 3 +#define TOKEN_ELSE 4 +#define TOKEN_ELIF 5 +#define TOKEN_ENDIF 6 +#define TOKEN_ERROR 7 +#define TOKEN_PRAGMA 8 +#define TOKEN_EXTENSION 9 +#define TOKEN_LINE 10 + +#define PARAM_END 0 +#define PARAM_PARAMETER 1 + +#define BEHAVIOR_REQUIRE 1 +#define BEHAVIOR_ENABLE 2 +#define BEHAVIOR_WARN 3 +#define BEHAVIOR_DISABLE 4 + +static GLboolean +preprocess_source (slang_string *output, const char *source, grammar pid, grammar eid, + slang_info_log *elog) +{ + byte *prod; + GLuint size, i; + pp_state state; + + if (!grammar_fast_check (pid, (const byte *) (source), &prod, &size, 65536)) { + grammar_error_to_log (elog); + return GL_FALSE; + } + + pp_state_init (&state, elog); + + i = 0; + while (i < size) { + if (prod[i] != ESCAPE_TOKEN) { + if (state.cond.top->effective) { + slang_string input; + expand_state es; + + /* Eat only one line of source code to expand it. + * FIXME: This approach has one drawback. If a macro with parameters spans across + * multiple lines, the preprocessor will raise an error. */ + slang_string_init (&input); + while (prod[i] != '\0' && prod[i] != '\n') + slang_string_pushc (&input, prod[i++]); + if (prod[i] != '\0') + slang_string_pushc (&input, prod[i++]); + + /* Increment line number. */ + state.line++; + + es.output = output; + es.input = slang_string_cstr (&input); + es.state = &state; + if (!expand (&es, &state.symbols)) + goto error; + + slang_string_free (&input); + } + else { + /* Condition stack is disabled - keep track on line numbers and output only newlines. */ + if (prod[i] == '\n') { + state.line++; + /*pp_annotate (output, "%c", prod[i]);*/ + } + else { + /*pp_annotate (output, "%c", prod[i]);*/ + } + i++; + } + } + else { + const char *id; + GLuint idlen; + + i++; + switch (prod[i++]) { + + case TOKEN_END: + /* End of source string. + * Check if all #ifs have been terminated by matching #endifs. + * On condition stack there should be only the global condition context. */ + if (state.cond.top->endif_required) { + slang_info_log_error (elog, "end of source without matching #endif."); + return GL_FALSE; + } + break; + + case TOKEN_DEFINE: + { + pp_symbol *symbol = NULL; + + /* Parse macro name. */ + id = (const char *) (&prod[i]); + idlen = _mesa_strlen (id); + if (state.cond.top->effective) { + pp_annotate (output, "// #define %s(", id); + + /* If the symbol is already defined, override it. */ + symbol = pp_symbols_find (&state.symbols, id); + if (symbol == NULL) { + symbol = pp_symbols_push (&state.symbols); + if (symbol == NULL) + goto error; + slang_string_pushs (&symbol->name, id, idlen); + } + else { + pp_symbol_reset (symbol); + } + } + i += idlen + 1; + + /* Parse optional macro parameters. */ + while (prod[i++] != PARAM_END) { + if (state.cond.top->effective) { + pp_symbol *param; + + id = (const char *) (&prod[i]); + idlen = _mesa_strlen (id); + pp_annotate (output, "%s, ", id); + param = pp_symbols_push (&symbol->parameters); + if (param == NULL) + goto error; + slang_string_pushs (¶m->name, id, idlen); + } + i += idlen + 1; + } + + /* Parse macro replacement. */ + id = (const char *) (&prod[i]); + idlen = _mesa_strlen (id); + if (state.cond.top->effective) { + pp_annotate (output, ") %s", id); + slang_string_pushs (&symbol->replacement, id, idlen); + } + i += idlen + 1; + } + break; + + case TOKEN_UNDEF: + id = (const char *) (&prod[i]); + i += _mesa_strlen (id) + 1; + if (state.cond.top->effective) { + pp_symbol *symbol; + + pp_annotate (output, "// #undef %s", id); + /* Try to find symbol with given name and remove it. */ + symbol = pp_symbols_find (&state.symbols, id); + if (symbol != NULL) + if (!pp_symbols_erase (&state.symbols, symbol)) + goto error; + } + break; + + case TOKEN_IF: + { + GLint result; + + /* Parse #if expression end execute it. */ + pp_annotate (output, "// #if "); + if (!parse_if (output, prod, &i, &result, &state, eid)) + goto error; + + /* Push new condition on the stack. */ + if (!pp_cond_stack_push (&state.cond, state.elog)) + goto error; + state.cond.top->current = result ? GL_TRUE : GL_FALSE; + state.cond.top->else_allowed = GL_TRUE; + state.cond.top->endif_required = GL_TRUE; + pp_cond_stack_reevaluate (&state.cond); + } + break; + + case TOKEN_ELSE: + /* Check if #else is alloved here. */ + if (!state.cond.top->else_allowed) { + slang_info_log_error (elog, "#else without matching #if."); + goto error; + } + + /* Negate current condition and reevaluate it. */ + state.cond.top->current = !state.cond.top->current; + state.cond.top->else_allowed = GL_FALSE; + pp_cond_stack_reevaluate (&state.cond); + if (state.cond.top->effective) + pp_annotate (output, "// #else"); + break; + + case TOKEN_ELIF: + /* Check if #elif is alloved here. */ + if (!state.cond.top->else_allowed) { + slang_info_log_error (elog, "#elif without matching #if."); + goto error; + } + + /* Negate current condition and reevaluate it. */ + state.cond.top->current = !state.cond.top->current; + pp_cond_stack_reevaluate (&state.cond); + + if (state.cond.top->effective) + pp_annotate (output, "// #elif "); + + { + GLint result; + + /* Parse #elif expression end execute it. */ + if (!parse_if (output, prod, &i, &result, &state, eid)) + goto error; + + /* Update current condition and reevaluate it. */ + state.cond.top->current = result ? GL_TRUE : GL_FALSE; + pp_cond_stack_reevaluate (&state.cond); + } + break; + + case TOKEN_ENDIF: + /* Check if #endif is alloved here. */ + if (!state.cond.top->endif_required) { + slang_info_log_error (elog, "#endif without matching #if."); + goto error; + } + + /* Pop the condition off the stack. */ + state.cond.top++; + if (state.cond.top->effective) + pp_annotate (output, "// #endif"); + break; + + case TOKEN_EXTENSION: + /* Parse the extension name. */ + id = (const char *) (&prod[i]); + i += _mesa_strlen (id) + 1; + if (state.cond.top->effective) + pp_annotate (output, "// #extension %s: ", id); + + /* Parse and apply extension behavior. */ + if (state.cond.top->effective) { + switch (prod[i++]) { + + case BEHAVIOR_REQUIRE: + pp_annotate (output, "require"); + if (!pp_ext_set (&state.ext, id, GL_TRUE)) { + if (_mesa_strcmp (id, "all") == 0) { + slang_info_log_error (elog, "require: bad behavior for #extension all."); + goto error; + } + else { + slang_info_log_error (elog, "%s: required extension is not supported.", id); + goto error; + } + } + break; + + case BEHAVIOR_ENABLE: + pp_annotate (output, "enable"); + if (!pp_ext_set (&state.ext, id, GL_TRUE)) { + if (_mesa_strcmp (id, "all") == 0) { + slang_info_log_error (elog, "enable: bad behavior for #extension all."); + goto error; + } + else { + slang_info_log_warning (elog, "%s: enabled extension is not supported.", id); + } + } + break; + + case BEHAVIOR_WARN: + pp_annotate (output, "warn"); + if (!pp_ext_set (&state.ext, id, GL_TRUE)) { + if (_mesa_strcmp (id, "all") != 0) { + slang_info_log_warning (elog, "%s: enabled extension is not supported.", id); + } + } + break; + + case BEHAVIOR_DISABLE: + pp_annotate (output, "disable"); + if (!pp_ext_set (&state.ext, id, GL_FALSE)) { + if (_mesa_strcmp (id, "all") == 0) { + pp_ext_disable_all (&state.ext); + } + else { + slang_info_log_warning (elog, "%s: disabled extension is not supported.", id); + } + } + break; + + default: + assert (0); + } + } + break; + + case TOKEN_LINE: + id = (const char *) (&prod[i]); + i += _mesa_strlen (id) + 1; + + if (state.cond.top->effective) { + slang_string buffer; + GLuint count; + GLint results[2]; + expand_state es; + + slang_string_init (&buffer); + state.line++; + es.output = &buffer; + es.input = id; + es.state = &state; + if (!expand (&es, &state.symbols)) + goto error; + + pp_annotate (output, "// #line "); + count = execute_expressions (output, eid, + (const byte *) (slang_string_cstr (&buffer)), + results, state.elog); + slang_string_free (&buffer); + if (count == 0) + goto error; + + state.line = results[0] - 1; + if (count == 2) + state.file = results[1]; + } + break; + } + } + } + + /* Check for missing #endifs. */ + if (state.cond.top->endif_required) { + slang_info_log_error (elog, "#endif expected but end of source found."); + goto error; + } + + pp_state_free (&state); + return GL_TRUE; + +error: + pp_state_free (&state); + return GL_FALSE; +} + +GLboolean +_slang_preprocess_directives (slang_string *output, const char *input, slang_info_log *elog) +{ + grammar pid, eid; + GLboolean success; + + pid = grammar_load_from_text ((const byte *) (slang_pp_directives_syn)); + if (pid == 0) { + grammar_error_to_log (elog); + return GL_FALSE; + } + eid = grammar_load_from_text ((const byte *) (slang_pp_expression_syn)); + if (eid == 0) { + grammar_error_to_log (elog); + grammar_destroy (pid); + return GL_FALSE; + } + success = preprocess_source (output, input, pid, eid, elog); + grammar_destroy (eid); + grammar_destroy (pid); + return success; +} + diff --git a/src/mesa/shader/slang/slang_preprocess.h b/src/mesa/shader/slang/slang_preprocess.h index b55852dc4c0..f83e6e6e3fc 100644 --- a/src/mesa/shader/slang/slang_preprocess.h +++ b/src/mesa/shader/slang/slang_preprocess.h @@ -1,6 +1,6 @@ /* * Mesa 3-D graphics library - * Version: 6.5 + * Version: 6.6 * * Copyright (C) 2005-2006 Brian Paul All Rights Reserved. * @@ -34,6 +34,9 @@ extern "C" { GLboolean _slang_preprocess_version (const char *, GLuint *, GLuint *, slang_info_log *); +GLboolean +_slang_preprocess_directives (slang_string *output, const char *input, slang_info_log *); + #ifdef __cplusplus } #endif diff --git a/src/mesa/shader/slang/slang_utility.c b/src/mesa/shader/slang/slang_utility.c index 20ea6abae59..54fcc8a2382 100644 --- a/src/mesa/shader/slang/slang_utility.c +++ b/src/mesa/shader/slang/slang_utility.c @@ -1,6 +1,6 @@ /* * Mesa 3-D graphics library - * Version: 6.5 + * Version: 6.6 * * Copyright (C) 2005-2006 Brian Paul All Rights Reserved. * @@ -36,6 +36,99 @@ char *slang_string_concat (char *dst, const char *src) return _mesa_strcpy (dst + _mesa_strlen (dst), src); } +/* slang_string */ + +GLvoid +slang_string_init (slang_string *self) +{ + self->data = NULL; + self->capacity = 0; + self->length = 0; + self->fail = GL_FALSE; +} + +GLvoid +slang_string_free (slang_string *self) +{ + if (self->data != NULL) + _mesa_free (self->data); +} + +GLvoid +slang_string_reset (slang_string *self) +{ + self->length = 0; + self->fail = GL_FALSE; +} + +static GLboolean +grow (slang_string *self, GLuint size) +{ + if (self->fail) + return GL_FALSE; + if (size > self->capacity) { + /* do not overflow 32-bit range */ + assert (size < 0x80000000); + + self->data = (char *) (_mesa_realloc (self->data, self->capacity, size * 2)); + self->capacity = size * 2; + if (self->data == NULL) { + self->capacity = 0; + self->fail = GL_TRUE; + return GL_FALSE; + } + } + return GL_TRUE; +} + +GLvoid +slang_string_push (slang_string *self, const slang_string *str) +{ + if (str->fail) { + self->fail = GL_TRUE; + return; + } + if (grow (self, self->length + str->length)) { + _mesa_memcpy (&self->data[self->length], str->data, str->length); + self->length += str->length; + } +} + +GLvoid +slang_string_pushc (slang_string *self, const char c) +{ + if (grow (self, self->length + 1)) { + self->data[self->length] = c; + self->length++; + } +} + +GLvoid +slang_string_pushs (slang_string *self, const char *cstr, GLuint len) +{ + if (grow (self, self->length + len)) { + _mesa_memcpy (&self->data[self->length], cstr, len); + self->length += len; + } +} + +GLvoid +slang_string_pushi (slang_string *self, GLint i) +{ + char buffer[12]; + + _mesa_sprintf (buffer, "%d", i); + slang_string_pushs (self, buffer, strlen (buffer)); +} + +const char * +slang_string_cstr (slang_string *self) +{ + if (grow (self, self->length + 1)) + self->data[self->length] = '\0'; + return self->data; +} + /* slang_atom_pool */ void slang_atom_pool_construct (slang_atom_pool *pool) diff --git a/src/mesa/shader/slang/slang_utility.h b/src/mesa/shader/slang/slang_utility.h index 7a1997e5597..565de4e4b02 100644 --- a/src/mesa/shader/slang/slang_utility.h +++ b/src/mesa/shader/slang/slang_utility.h @@ -1,6 +1,6 @@ /* * Mesa 3-D graphics library - * Version: 6.5 + * Version: 6.6 * * Copyright (C) 2005-2006 Brian Paul All Rights Reserved. * @@ -44,6 +44,42 @@ extern "C" { char *slang_string_concat (char *, const char *); +/* slang_string */ + +typedef struct +{ + char *data; + GLuint length; + GLuint capacity; + GLboolean fail; +} slang_string; + +GLvoid +slang_string_init (slang_string *); + +GLvoid +slang_string_free (slang_string *); + +GLvoid +slang_string_reset (slang_string *); + +GLvoid +slang_string_push (slang_string *, const slang_string *); + +GLvoid +slang_string_pushc (slang_string *, const char); + +GLvoid +slang_string_pushs (slang_string *, const char *, GLuint); + +GLvoid +slang_string_pushi (slang_string *, GLint); + +const char * +slang_string_cstr (slang_string *); + +/* slang_atom */ + typedef GLvoid *slang_atom; #define SLANG_ATOM_NULL ((slang_atom) 0) |