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Diffstat (limited to 'mesalib/src/mesa/shader/slang/slang_compile.c')
-rw-r--r--mesalib/src/mesa/shader/slang/slang_compile.c2825
1 files changed, 2825 insertions, 0 deletions
diff --git a/mesalib/src/mesa/shader/slang/slang_compile.c b/mesalib/src/mesa/shader/slang/slang_compile.c
new file mode 100644
index 000000000..c1b97c7cb
--- /dev/null
+++ b/mesalib/src/mesa/shader/slang/slang_compile.c
@@ -0,0 +1,2825 @@
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 2005-2006 Brian Paul All Rights Reserved.
+ * Copyright (C) 2008 VMware, Inc. All Rights Reserved.
+ *
+ * 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 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
+ * BRIAN PAUL 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.
+ */
+
+/**
+ * \file slang_compile.c
+ * slang front-end compiler
+ * \author Michal Krol
+ */
+
+#include "main/imports.h"
+#include "main/context.h"
+#include "shader/program.h"
+#include "shader/programopt.h"
+#include "shader/prog_optimize.h"
+#include "shader/prog_print.h"
+#include "shader/prog_parameter.h"
+#include "shader/grammar/grammar_mesa.h"
+#include "slang_codegen.h"
+#include "slang_compile.h"
+#include "slang_preprocess.h"
+#include "slang_storage.h"
+#include "slang_emit.h"
+#include "slang_log.h"
+#include "slang_mem.h"
+#include "slang_vartable.h"
+#include "slang_simplify.h"
+
+#include "slang_print.h"
+
+/*
+ * This is a straightforward implementation of the slang front-end
+ * compiler. Lots of error-checking functionality is missing but
+ * every well-formed shader source should compile successfully and
+ * execute as expected. However, some semantically ill-formed shaders
+ * may be accepted resulting in undefined behaviour.
+ */
+
+
+/** re-defined below, should be the same though */
+#define TYPE_SPECIFIER_COUNT 32
+
+
+/**
+ * Check if the given identifier is legal.
+ */
+static GLboolean
+legal_identifier(slang_atom name)
+{
+ /* "gl_" is a reserved prefix */
+ if (_mesa_strncmp((char *) name, "gl_", 3) == 0) {
+ return GL_FALSE;
+ }
+ return GL_TRUE;
+}
+
+
+/*
+ * slang_code_unit
+ */
+
+GLvoid
+_slang_code_unit_ctr(slang_code_unit * self,
+ struct slang_code_object_ * object)
+{
+ _slang_variable_scope_ctr(&self->vars);
+ _slang_function_scope_ctr(&self->funs);
+ _slang_struct_scope_ctr(&self->structs);
+ self->object = object;
+}
+
+GLvoid
+_slang_code_unit_dtr(slang_code_unit * self)
+{
+ slang_variable_scope_destruct(&self->vars);
+ slang_function_scope_destruct(&self->funs);
+ slang_struct_scope_destruct(&self->structs);
+}
+
+/*
+ * slang_code_object
+ */
+
+GLvoid
+_slang_code_object_ctr(slang_code_object * self)
+{
+ GLuint i;
+
+ for (i = 0; i < SLANG_BUILTIN_TOTAL; i++)
+ _slang_code_unit_ctr(&self->builtin[i], self);
+ _slang_code_unit_ctr(&self->unit, self);
+ slang_atom_pool_construct(&self->atompool);
+}
+
+GLvoid
+_slang_code_object_dtr(slang_code_object * self)
+{
+ GLuint i;
+
+ for (i = 0; i < SLANG_BUILTIN_TOTAL; i++)
+ _slang_code_unit_dtr(&self->builtin[i]);
+ _slang_code_unit_dtr(&self->unit);
+ slang_atom_pool_destruct(&self->atompool);
+}
+
+
+/* slang_parse_ctx */
+
+typedef struct slang_parse_ctx_
+{
+ const byte *I;
+ slang_info_log *L;
+ int parsing_builtin;
+ GLboolean global_scope; /**< Is object being declared a global? */
+ slang_atom_pool *atoms;
+ slang_unit_type type; /**< Vertex vs. Fragment */
+ GLuint version; /**< user-specified (or default) #version */
+} slang_parse_ctx;
+
+/* slang_output_ctx */
+
+typedef struct slang_output_ctx_
+{
+ slang_variable_scope *vars;
+ slang_function_scope *funs;
+ slang_struct_scope *structs;
+ struct gl_program *program;
+ struct gl_sl_pragmas *pragmas;
+ slang_var_table *vartable;
+ GLuint default_precision[TYPE_SPECIFIER_COUNT];
+ GLboolean allow_precision;
+ GLboolean allow_invariant;
+ GLboolean allow_centroid;
+ GLboolean allow_array_types; /* float[] syntax */
+} slang_output_ctx;
+
+/* _slang_compile() */
+
+
+/* Debugging aid, print file/line where parsing error is detected */
+#define RETURN0 \
+ do { \
+ if (0) \
+ printf("slang error at %s:%d\n", __FILE__, __LINE__); \
+ return 0; \
+ } while (0)
+
+
+static void
+parse_identifier_str(slang_parse_ctx * C, char **id)
+{
+ *id = (char *) C->I;
+ C->I += _mesa_strlen(*id) + 1;
+}
+
+static slang_atom
+parse_identifier(slang_parse_ctx * C)
+{
+ const char *id;
+
+ id = (const char *) C->I;
+ C->I += _mesa_strlen(id) + 1;
+ return slang_atom_pool_atom(C->atoms, id);
+}
+
+static int
+parse_number(slang_parse_ctx * C, int *number)
+{
+ const int radix = (int) (*C->I++);
+ *number = 0;
+ while (*C->I != '\0') {
+ int digit;
+ if (*C->I >= '0' && *C->I <= '9')
+ digit = (int) (*C->I - '0');
+ else if (*C->I >= 'A' && *C->I <= 'Z')
+ digit = (int) (*C->I - 'A') + 10;
+ else
+ digit = (int) (*C->I - 'a') + 10;
+ *number = *number * radix + digit;
+ C->I++;
+ }
+ C->I++;
+ if (*number > 65535)
+ slang_info_log_warning(C->L, "%d: literal integer overflow.", *number);
+ return 1;
+}
+
+static int
+parse_float(slang_parse_ctx * C, float *number)
+{
+ char *integral = NULL;
+ char *fractional = NULL;
+ char *exponent = NULL;
+ char *whole = NULL;
+
+ parse_identifier_str(C, &integral);
+ parse_identifier_str(C, &fractional);
+ parse_identifier_str(C, &exponent);
+
+ whole = (char *) _slang_alloc((_mesa_strlen(integral) +
+ _mesa_strlen(fractional) +
+ _mesa_strlen(exponent) + 3) * sizeof(char));
+ if (whole == NULL) {
+ slang_info_log_memory(C->L);
+ RETURN0;
+ }
+
+ slang_string_copy(whole, integral);
+ slang_string_concat(whole, ".");
+ slang_string_concat(whole, fractional);
+ slang_string_concat(whole, "E");
+ slang_string_concat(whole, exponent);
+
+ *number = (float) (_mesa_strtod(whole, (char **) NULL));
+
+ _slang_free(whole);
+
+ return 1;
+}
+
+/* revision number - increment after each change affecting emitted output */
+#define REVISION 5
+
+static int
+check_revision(slang_parse_ctx * C)
+{
+ if (*C->I != REVISION) {
+ slang_info_log_error(C->L, "Internal compiler error.");
+ RETURN0;
+ }
+ C->I++;
+ return 1;
+}
+
+static int parse_statement(slang_parse_ctx *, slang_output_ctx *,
+ slang_operation *);
+static int parse_expression(slang_parse_ctx *, slang_output_ctx *,
+ slang_operation *);
+static int parse_type_specifier(slang_parse_ctx *, slang_output_ctx *,
+ slang_type_specifier *);
+static int
+parse_type_array_size(slang_parse_ctx *C,
+ slang_output_ctx *O,
+ GLint *array_len);
+
+static GLboolean
+parse_array_len(slang_parse_ctx * C, slang_output_ctx * O, GLuint * len)
+{
+ slang_operation array_size;
+ slang_name_space space;
+ GLboolean result;
+
+ if (!slang_operation_construct(&array_size))
+ return GL_FALSE;
+ if (!parse_expression(C, O, &array_size)) {
+ slang_operation_destruct(&array_size);
+ return GL_FALSE;
+ }
+
+ space.funcs = O->funs;
+ space.structs = O->structs;
+ space.vars = O->vars;
+
+ /* evaluate compile-time expression which is array size */
+ _slang_simplify(&array_size, &space, C->atoms);
+
+ if (array_size.type == SLANG_OPER_LITERAL_INT) {
+ result = GL_TRUE;
+ *len = (GLint) array_size.literal[0];
+ } else if (array_size.type == SLANG_OPER_IDENTIFIER) {
+ slang_variable *var = _slang_variable_locate(array_size.locals, array_size.a_id, GL_TRUE);
+ if (!var) {
+ slang_info_log_error(C->L, "undefined variable '%s'",
+ (char *) array_size.a_id);
+ result = GL_FALSE;
+ } else if (var->type.qualifier == SLANG_QUAL_CONST &&
+ var->type.specifier.type == SLANG_SPEC_INT) {
+ if (var->initializer &&
+ var->initializer->type == SLANG_OPER_LITERAL_INT) {
+ *len = (GLint) var->initializer->literal[0];
+ result = GL_TRUE;
+ } else {
+ slang_info_log_error(C->L, "unable to parse array size declaration");
+ result = GL_FALSE;
+ }
+ } else {
+ slang_info_log_error(C->L, "unable to parse array size declaration");
+ result = GL_FALSE;
+ }
+ } else {
+ result = GL_FALSE;
+ }
+
+ slang_operation_destruct(&array_size);
+ return result;
+}
+
+static GLboolean
+calculate_var_size(slang_parse_ctx * C, slang_output_ctx * O,
+ slang_variable * var)
+{
+ slang_storage_aggregate agg;
+
+ if (!slang_storage_aggregate_construct(&agg))
+ return GL_FALSE;
+ if (!_slang_aggregate_variable(&agg, &var->type.specifier, var->array_len,
+ O->funs, O->structs, O->vars, C->atoms)) {
+ slang_storage_aggregate_destruct(&agg);
+ return GL_FALSE;
+ }
+ var->size = _slang_sizeof_aggregate(&agg);
+ slang_storage_aggregate_destruct(&agg);
+ return GL_TRUE;
+}
+
+static void
+promote_type_to_array(slang_parse_ctx *C,
+ slang_fully_specified_type *type,
+ GLint array_len)
+{
+ slang_type_specifier *baseType =
+ slang_type_specifier_new(type->specifier.type, NULL, NULL);
+
+ type->specifier.type = SLANG_SPEC_ARRAY;
+ type->specifier._array = baseType;
+ type->array_len = array_len;
+}
+
+
+static GLboolean
+convert_to_array(slang_parse_ctx * C, slang_variable * var,
+ const slang_type_specifier * sp)
+{
+ /* sized array - mark it as array, copy the specifier to the array element
+ * and parse the expression */
+ var->type.specifier.type = SLANG_SPEC_ARRAY;
+ var->type.specifier._array = (slang_type_specifier *)
+ _slang_alloc(sizeof(slang_type_specifier));
+ if (var->type.specifier._array == NULL) {
+ slang_info_log_memory(C->L);
+ return GL_FALSE;
+ }
+ slang_type_specifier_ctr(var->type.specifier._array);
+ return slang_type_specifier_copy(var->type.specifier._array, sp);
+}
+
+/* structure field */
+#define FIELD_NONE 0
+#define FIELD_NEXT 1
+#define FIELD_ARRAY 2
+
+static GLboolean
+parse_struct_field_var(slang_parse_ctx * C, slang_output_ctx * O,
+ slang_variable * var, slang_atom a_name,
+ const slang_type_specifier * sp,
+ GLuint array_len)
+{
+ var->a_name = a_name;
+ if (var->a_name == SLANG_ATOM_NULL)
+ return GL_FALSE;
+
+ switch (*C->I++) {
+ case FIELD_NONE:
+ if (array_len != -1) {
+ if (!convert_to_array(C, var, sp))
+ return GL_FALSE;
+ var->array_len = array_len;
+ }
+ else {
+ if (!slang_type_specifier_copy(&var->type.specifier, sp))
+ return GL_FALSE;
+ }
+ break;
+ case FIELD_ARRAY:
+ if (array_len != -1)
+ return GL_FALSE;
+ if (!convert_to_array(C, var, sp))
+ return GL_FALSE;
+ if (!parse_array_len(C, O, &var->array_len))
+ return GL_FALSE;
+ break;
+ default:
+ return GL_FALSE;
+ }
+
+ return calculate_var_size(C, O, var);
+}
+
+static int
+parse_struct_field(slang_parse_ctx * C, slang_output_ctx * O,
+ slang_struct * st, slang_type_specifier * sp)
+{
+ slang_output_ctx o = *O;
+ GLint array_len;
+
+ o.structs = st->structs;
+ if (!parse_type_specifier(C, &o, sp))
+ RETURN0;
+ if (!parse_type_array_size(C, &o, &array_len))
+ RETURN0;
+
+ do {
+ slang_atom a_name;
+ slang_variable *var = slang_variable_scope_grow(st->fields);
+ if (!var) {
+ slang_info_log_memory(C->L);
+ RETURN0;
+ }
+ a_name = parse_identifier(C);
+ if (_slang_variable_locate(st->fields, a_name, GL_FALSE)) {
+ slang_info_log_error(C->L, "duplicate field '%s'", (char *) a_name);
+ RETURN0;
+ }
+
+ if (!parse_struct_field_var(C, &o, var, a_name, sp, array_len))
+ RETURN0;
+ }
+ while (*C->I++ != FIELD_NONE);
+
+ return 1;
+}
+
+static int
+parse_struct(slang_parse_ctx * C, slang_output_ctx * O, slang_struct ** st)
+{
+ slang_atom a_name;
+ const char *name;
+
+ /* parse struct name (if any) and make sure it is unique in current scope */
+ a_name = parse_identifier(C);
+ if (a_name == SLANG_ATOM_NULL)
+ RETURN0;
+
+ name = slang_atom_pool_id(C->atoms, a_name);
+ if (name[0] != '\0'
+ && slang_struct_scope_find(O->structs, a_name, 0) != NULL) {
+ slang_info_log_error(C->L, "%s: duplicate type name.", name);
+ RETURN0;
+ }
+
+ /* set-up a new struct */
+ *st = (slang_struct *) _slang_alloc(sizeof(slang_struct));
+ if (*st == NULL) {
+ slang_info_log_memory(C->L);
+ RETURN0;
+ }
+ if (!slang_struct_construct(*st)) {
+ _slang_free(*st);
+ *st = NULL;
+ slang_info_log_memory(C->L);
+ RETURN0;
+ }
+ (**st).a_name = a_name;
+ (**st).structs->outer_scope = O->structs;
+
+ /* parse individual struct fields */
+ do {
+ slang_type_specifier sp;
+
+ slang_type_specifier_ctr(&sp);
+ if (!parse_struct_field(C, O, *st, &sp)) {
+ slang_type_specifier_dtr(&sp);
+ RETURN0;
+ }
+ slang_type_specifier_dtr(&sp);
+ }
+ while (*C->I++ != FIELD_NONE);
+
+ /* if named struct, copy it to current scope */
+ if (name[0] != '\0') {
+ slang_struct *s;
+
+ O->structs->structs =
+ (slang_struct *) _slang_realloc(O->structs->structs,
+ O->structs->num_structs
+ * sizeof(slang_struct),
+ (O->structs->num_structs + 1)
+ * sizeof(slang_struct));
+ if (O->structs->structs == NULL) {
+ slang_info_log_memory(C->L);
+ RETURN0;
+ }
+ s = &O->structs->structs[O->structs->num_structs];
+ if (!slang_struct_construct(s))
+ RETURN0;
+ O->structs->num_structs++;
+ if (!slang_struct_copy(s, *st))
+ RETURN0;
+ }
+
+ return 1;
+}
+
+
+/* invariant qualifer */
+#define TYPE_VARIANT 90
+#define TYPE_INVARIANT 91
+
+static int
+parse_type_variant(slang_parse_ctx * C, slang_type_variant *variant)
+{
+ GLuint invariant = *C->I++;
+ switch (invariant) {
+ case TYPE_VARIANT:
+ *variant = SLANG_VARIANT;
+ return 1;
+ case TYPE_INVARIANT:
+ *variant = SLANG_INVARIANT;
+ return 1;
+ default:
+ RETURN0;
+ }
+}
+
+
+/* centroid qualifer */
+#define TYPE_CENTER 95
+#define TYPE_CENTROID 96
+
+static int
+parse_type_centroid(slang_parse_ctx * C, slang_type_centroid *centroid)
+{
+ GLuint c = *C->I++;
+ switch (c) {
+ case TYPE_CENTER:
+ *centroid = SLANG_CENTER;
+ return 1;
+ case TYPE_CENTROID:
+ *centroid = SLANG_CENTROID;
+ return 1;
+ default:
+ RETURN0;
+ }
+}
+
+
+/* type qualifier */
+#define TYPE_QUALIFIER_NONE 0
+#define TYPE_QUALIFIER_CONST 1
+#define TYPE_QUALIFIER_ATTRIBUTE 2
+#define TYPE_QUALIFIER_VARYING 3
+#define TYPE_QUALIFIER_UNIFORM 4
+#define TYPE_QUALIFIER_FIXEDOUTPUT 5
+#define TYPE_QUALIFIER_FIXEDINPUT 6
+
+static int
+parse_type_qualifier(slang_parse_ctx * C, slang_type_qualifier * qual)
+{
+ GLuint qualifier = *C->I++;
+ switch (qualifier) {
+ case TYPE_QUALIFIER_NONE:
+ *qual = SLANG_QUAL_NONE;
+ break;
+ case TYPE_QUALIFIER_CONST:
+ *qual = SLANG_QUAL_CONST;
+ break;
+ case TYPE_QUALIFIER_ATTRIBUTE:
+ *qual = SLANG_QUAL_ATTRIBUTE;
+ break;
+ case TYPE_QUALIFIER_VARYING:
+ *qual = SLANG_QUAL_VARYING;
+ break;
+ case TYPE_QUALIFIER_UNIFORM:
+ *qual = SLANG_QUAL_UNIFORM;
+ break;
+ case TYPE_QUALIFIER_FIXEDOUTPUT:
+ *qual = SLANG_QUAL_FIXEDOUTPUT;
+ break;
+ case TYPE_QUALIFIER_FIXEDINPUT:
+ *qual = SLANG_QUAL_FIXEDINPUT;
+ break;
+ default:
+ RETURN0;
+ }
+ return 1;
+}
+
+/* type specifier */
+#define TYPE_SPECIFIER_VOID 0
+#define TYPE_SPECIFIER_BOOL 1
+#define TYPE_SPECIFIER_BVEC2 2
+#define TYPE_SPECIFIER_BVEC3 3
+#define TYPE_SPECIFIER_BVEC4 4
+#define TYPE_SPECIFIER_INT 5
+#define TYPE_SPECIFIER_IVEC2 6
+#define TYPE_SPECIFIER_IVEC3 7
+#define TYPE_SPECIFIER_IVEC4 8
+#define TYPE_SPECIFIER_FLOAT 9
+#define TYPE_SPECIFIER_VEC2 10
+#define TYPE_SPECIFIER_VEC3 11
+#define TYPE_SPECIFIER_VEC4 12
+#define TYPE_SPECIFIER_MAT2 13
+#define TYPE_SPECIFIER_MAT3 14
+#define TYPE_SPECIFIER_MAT4 15
+#define TYPE_SPECIFIER_SAMPLER1D 16
+#define TYPE_SPECIFIER_SAMPLER2D 17
+#define TYPE_SPECIFIER_SAMPLER3D 18
+#define TYPE_SPECIFIER_SAMPLERCUBE 19
+#define TYPE_SPECIFIER_SAMPLER1DSHADOW 20
+#define TYPE_SPECIFIER_SAMPLER2DSHADOW 21
+#define TYPE_SPECIFIER_SAMPLER2DRECT 22
+#define TYPE_SPECIFIER_SAMPLER2DRECTSHADOW 23
+#define TYPE_SPECIFIER_STRUCT 24
+#define TYPE_SPECIFIER_TYPENAME 25
+#define TYPE_SPECIFIER_MAT23 26
+#define TYPE_SPECIFIER_MAT32 27
+#define TYPE_SPECIFIER_MAT24 28
+#define TYPE_SPECIFIER_MAT42 29
+#define TYPE_SPECIFIER_MAT34 30
+#define TYPE_SPECIFIER_MAT43 31
+#define TYPE_SPECIFIER_COUNT 32
+
+static int
+parse_type_specifier(slang_parse_ctx * C, slang_output_ctx * O,
+ slang_type_specifier * spec)
+{
+ switch (*C->I++) {
+ case TYPE_SPECIFIER_VOID:
+ spec->type = SLANG_SPEC_VOID;
+ break;
+ case TYPE_SPECIFIER_BOOL:
+ spec->type = SLANG_SPEC_BOOL;
+ break;
+ case TYPE_SPECIFIER_BVEC2:
+ spec->type = SLANG_SPEC_BVEC2;
+ break;
+ case TYPE_SPECIFIER_BVEC3:
+ spec->type = SLANG_SPEC_BVEC3;
+ break;
+ case TYPE_SPECIFIER_BVEC4:
+ spec->type = SLANG_SPEC_BVEC4;
+ break;
+ case TYPE_SPECIFIER_INT:
+ spec->type = SLANG_SPEC_INT;
+ break;
+ case TYPE_SPECIFIER_IVEC2:
+ spec->type = SLANG_SPEC_IVEC2;
+ break;
+ case TYPE_SPECIFIER_IVEC3:
+ spec->type = SLANG_SPEC_IVEC3;
+ break;
+ case TYPE_SPECIFIER_IVEC4:
+ spec->type = SLANG_SPEC_IVEC4;
+ break;
+ case TYPE_SPECIFIER_FLOAT:
+ spec->type = SLANG_SPEC_FLOAT;
+ break;
+ case TYPE_SPECIFIER_VEC2:
+ spec->type = SLANG_SPEC_VEC2;
+ break;
+ case TYPE_SPECIFIER_VEC3:
+ spec->type = SLANG_SPEC_VEC3;
+ break;
+ case TYPE_SPECIFIER_VEC4:
+ spec->type = SLANG_SPEC_VEC4;
+ break;
+ case TYPE_SPECIFIER_MAT2:
+ spec->type = SLANG_SPEC_MAT2;
+ break;
+ case TYPE_SPECIFIER_MAT3:
+ spec->type = SLANG_SPEC_MAT3;
+ break;
+ case TYPE_SPECIFIER_MAT4:
+ spec->type = SLANG_SPEC_MAT4;
+ break;
+ case TYPE_SPECIFIER_MAT23:
+ spec->type = SLANG_SPEC_MAT23;
+ break;
+ case TYPE_SPECIFIER_MAT32:
+ spec->type = SLANG_SPEC_MAT32;
+ break;
+ case TYPE_SPECIFIER_MAT24:
+ spec->type = SLANG_SPEC_MAT24;
+ break;
+ case TYPE_SPECIFIER_MAT42:
+ spec->type = SLANG_SPEC_MAT42;
+ break;
+ case TYPE_SPECIFIER_MAT34:
+ spec->type = SLANG_SPEC_MAT34;
+ break;
+ case TYPE_SPECIFIER_MAT43:
+ spec->type = SLANG_SPEC_MAT43;
+ break;
+ case TYPE_SPECIFIER_SAMPLER1D:
+ spec->type = SLANG_SPEC_SAMPLER1D;
+ break;
+ case TYPE_SPECIFIER_SAMPLER2D:
+ spec->type = SLANG_SPEC_SAMPLER2D;
+ break;
+ case TYPE_SPECIFIER_SAMPLER3D:
+ spec->type = SLANG_SPEC_SAMPLER3D;
+ break;
+ case TYPE_SPECIFIER_SAMPLERCUBE:
+ spec->type = SLANG_SPEC_SAMPLERCUBE;
+ break;
+ case TYPE_SPECIFIER_SAMPLER2DRECT:
+ spec->type = SLANG_SPEC_SAMPLER2DRECT;
+ break;
+ case TYPE_SPECIFIER_SAMPLER1DSHADOW:
+ spec->type = SLANG_SPEC_SAMPLER1DSHADOW;
+ break;
+ case TYPE_SPECIFIER_SAMPLER2DSHADOW:
+ spec->type = SLANG_SPEC_SAMPLER2DSHADOW;
+ break;
+ case TYPE_SPECIFIER_SAMPLER2DRECTSHADOW:
+ spec->type = SLANG_SPEC_SAMPLER2DRECTSHADOW;
+ break;
+ case TYPE_SPECIFIER_STRUCT:
+ spec->type = SLANG_SPEC_STRUCT;
+ if (!parse_struct(C, O, &spec->_struct))
+ RETURN0;
+ break;
+ case TYPE_SPECIFIER_TYPENAME:
+ spec->type = SLANG_SPEC_STRUCT;
+ {
+ slang_atom a_name;
+ slang_struct *stru;
+
+ a_name = parse_identifier(C);
+ if (a_name == NULL)
+ RETURN0;
+
+ stru = slang_struct_scope_find(O->structs, a_name, 1);
+ if (stru == NULL) {
+ slang_info_log_error(C->L, "undeclared type name '%s'",
+ slang_atom_pool_id(C->atoms, a_name));
+ RETURN0;
+ }
+
+ spec->_struct = (slang_struct *) _slang_alloc(sizeof(slang_struct));
+ if (spec->_struct == NULL) {
+ slang_info_log_memory(C->L);
+ RETURN0;
+ }
+ if (!slang_struct_construct(spec->_struct)) {
+ _slang_free(spec->_struct);
+ spec->_struct = NULL;
+ RETURN0;
+ }
+ if (!slang_struct_copy(spec->_struct, stru))
+ RETURN0;
+ }
+ break;
+ default:
+ RETURN0;
+ }
+ return 1;
+}
+
+#define TYPE_SPECIFIER_NONARRAY 0
+#define TYPE_SPECIFIER_ARRAY 1
+
+static int
+parse_type_array_size(slang_parse_ctx *C,
+ slang_output_ctx *O,
+ GLint *array_len)
+{
+ GLuint size;
+
+ switch (*C->I++) {
+ case TYPE_SPECIFIER_NONARRAY:
+ *array_len = -1; /* -1 = not an array */
+ break;
+ case TYPE_SPECIFIER_ARRAY:
+ if (!parse_array_len(C, O, &size))
+ RETURN0;
+ *array_len = (GLint) size;
+ break;
+ default:
+ assert(0);
+ RETURN0;
+ }
+ return 1;
+}
+
+#define PRECISION_DEFAULT 0
+#define PRECISION_LOW 1
+#define PRECISION_MEDIUM 2
+#define PRECISION_HIGH 3
+
+static int
+parse_type_precision(slang_parse_ctx *C,
+ slang_type_precision *precision)
+{
+ GLint prec = *C->I++;
+ switch (prec) {
+ case PRECISION_DEFAULT:
+ *precision = SLANG_PREC_DEFAULT;
+ return 1;
+ case PRECISION_LOW:
+ *precision = SLANG_PREC_LOW;
+ return 1;
+ case PRECISION_MEDIUM:
+ *precision = SLANG_PREC_MEDIUM;
+ return 1;
+ case PRECISION_HIGH:
+ *precision = SLANG_PREC_HIGH;
+ return 1;
+ default:
+ RETURN0;
+ }
+}
+
+static int
+parse_fully_specified_type(slang_parse_ctx * C, slang_output_ctx * O,
+ slang_fully_specified_type * type)
+{
+ if (!parse_type_variant(C, &type->variant))
+ RETURN0;
+
+ if (!parse_type_centroid(C, &type->centroid))
+ RETURN0;
+
+ if (!parse_type_qualifier(C, &type->qualifier))
+ RETURN0;
+
+ if (!parse_type_precision(C, &type->precision))
+ RETURN0;
+
+ if (!parse_type_specifier(C, O, &type->specifier))
+ RETURN0;
+
+ if (!parse_type_array_size(C, O, &type->array_len))
+ RETURN0;
+
+ if (!O->allow_invariant && type->variant == SLANG_INVARIANT) {
+ slang_info_log_error(C->L,
+ "'invariant' keyword not allowed (perhaps set #version 120)");
+ RETURN0;
+ }
+
+ if (!O->allow_centroid && type->centroid == SLANG_CENTROID) {
+ slang_info_log_error(C->L,
+ "'centroid' keyword not allowed (perhaps set #version 120)");
+ RETURN0;
+ }
+ else if (type->centroid == SLANG_CENTROID &&
+ type->qualifier != SLANG_QUAL_VARYING) {
+ slang_info_log_error(C->L,
+ "'centroid' keyword only allowed for varying vars");
+ RETURN0;
+ }
+
+
+ /* need this?
+ if (type->qualifier != SLANG_QUAL_VARYING &&
+ type->variant == SLANG_INVARIANT) {
+ slang_info_log_error(C->L,
+ "invariant qualifer only allowed for varying vars");
+ RETURN0;
+ }
+ */
+
+ if (O->allow_precision) {
+ if (type->precision == SLANG_PREC_DEFAULT) {
+ assert(type->specifier.type < TYPE_SPECIFIER_COUNT);
+ /* use the default precision for this datatype */
+ type->precision = O->default_precision[type->specifier.type];
+ }
+ }
+ else {
+ /* only default is allowed */
+ if (type->precision != SLANG_PREC_DEFAULT) {
+ slang_info_log_error(C->L, "precision qualifiers not allowed");
+ RETURN0;
+ }
+ }
+
+ if (!O->allow_array_types && type->array_len >= 0) {
+ slang_info_log_error(C->L, "first-class array types not allowed");
+ RETURN0;
+ }
+
+ if (type->array_len >= 0) {
+ /* convert type to array type (ex: convert "int" to "array of int" */
+ promote_type_to_array(C, type, type->array_len);
+ }
+
+ return 1;
+}
+
+/* operation */
+#define OP_END 0
+#define OP_BLOCK_BEGIN_NO_NEW_SCOPE 1
+#define OP_BLOCK_BEGIN_NEW_SCOPE 2
+#define OP_DECLARE 3
+#define OP_ASM 4
+#define OP_BREAK 5
+#define OP_CONTINUE 6
+#define OP_DISCARD 7
+#define OP_RETURN 8
+#define OP_EXPRESSION 9
+#define OP_IF 10
+#define OP_WHILE 11
+#define OP_DO 12
+#define OP_FOR 13
+#define OP_PUSH_VOID 14
+#define OP_PUSH_BOOL 15
+#define OP_PUSH_INT 16
+#define OP_PUSH_FLOAT 17
+#define OP_PUSH_IDENTIFIER 18
+#define OP_SEQUENCE 19
+#define OP_ASSIGN 20
+#define OP_ADDASSIGN 21
+#define OP_SUBASSIGN 22
+#define OP_MULASSIGN 23
+#define OP_DIVASSIGN 24
+/*#define OP_MODASSIGN 25*/
+/*#define OP_LSHASSIGN 26*/
+/*#define OP_RSHASSIGN 27*/
+/*#define OP_ORASSIGN 28*/
+/*#define OP_XORASSIGN 29*/
+/*#define OP_ANDASSIGN 30*/
+#define OP_SELECT 31
+#define OP_LOGICALOR 32
+#define OP_LOGICALXOR 33
+#define OP_LOGICALAND 34
+/*#define OP_BITOR 35*/
+/*#define OP_BITXOR 36*/
+/*#define OP_BITAND 37*/
+#define OP_EQUAL 38
+#define OP_NOTEQUAL 39
+#define OP_LESS 40
+#define OP_GREATER 41
+#define OP_LESSEQUAL 42
+#define OP_GREATEREQUAL 43
+/*#define OP_LSHIFT 44*/
+/*#define OP_RSHIFT 45*/
+#define OP_ADD 46
+#define OP_SUBTRACT 47
+#define OP_MULTIPLY 48
+#define OP_DIVIDE 49
+/*#define OP_MODULUS 50*/
+#define OP_PREINCREMENT 51
+#define OP_PREDECREMENT 52
+#define OP_PLUS 53
+#define OP_MINUS 54
+/*#define OP_COMPLEMENT 55*/
+#define OP_NOT 56
+#define OP_SUBSCRIPT 57
+#define OP_CALL 58
+#define OP_FIELD 59
+#define OP_POSTINCREMENT 60
+#define OP_POSTDECREMENT 61
+#define OP_PRECISION 62
+#define OP_METHOD 63
+
+
+/**
+ * When parsing a compound production, this function is used to parse the
+ * children.
+ * For example, a while-loop compound will have two children, the
+ * while condition expression and the loop body. So, this function will
+ * be called twice to parse those two sub-expressions.
+ * \param C the parsing context
+ * \param O the output context
+ * \param oper the operation we're parsing
+ * \param statement indicates whether parsing a statement, or expression
+ * \return 1 if success, 0 if error
+ */
+static int
+parse_child_operation(slang_parse_ctx * C, slang_output_ctx * O,
+ slang_operation * oper, GLboolean statement)
+{
+ slang_operation *ch;
+
+ /* grow child array */
+ ch = slang_operation_grow(&oper->num_children, &oper->children);
+ if (statement)
+ return parse_statement(C, O, ch);
+ return parse_expression(C, O, ch);
+}
+
+static int parse_declaration(slang_parse_ctx * C, slang_output_ctx * O);
+
+static int
+parse_statement(slang_parse_ctx * C, slang_output_ctx * O,
+ slang_operation * oper)
+{
+ int op;
+
+ oper->locals->outer_scope = O->vars;
+
+ op = *C->I++;
+ switch (op) {
+ case OP_BLOCK_BEGIN_NO_NEW_SCOPE:
+ /* parse child statements, do not create new variable scope */
+ oper->type = SLANG_OPER_BLOCK_NO_NEW_SCOPE;
+ while (*C->I != OP_END)
+ if (!parse_child_operation(C, O, oper, GL_TRUE))
+ RETURN0;
+ C->I++;
+ break;
+ case OP_BLOCK_BEGIN_NEW_SCOPE:
+ /* parse child statements, create new variable scope */
+ {
+ slang_output_ctx o = *O;
+
+ oper->type = SLANG_OPER_BLOCK_NEW_SCOPE;
+ o.vars = oper->locals;
+ while (*C->I != OP_END)
+ if (!parse_child_operation(C, &o, oper, GL_TRUE))
+ RETURN0;
+ C->I++;
+ }
+ break;
+ case OP_DECLARE:
+ /* local variable declaration, individual declarators are stored as
+ * children identifiers
+ */
+ oper->type = SLANG_OPER_BLOCK_NO_NEW_SCOPE;
+ {
+ const unsigned int first_var = O->vars->num_variables;
+
+ /* parse the declaration, note that there can be zero or more
+ * than one declarators
+ */
+ if (!parse_declaration(C, O))
+ RETURN0;
+ if (first_var < O->vars->num_variables) {
+ const unsigned int num_vars = O->vars->num_variables - first_var;
+ unsigned int i;
+ assert(oper->num_children == 0);
+ oper->num_children = num_vars;
+ oper->children = slang_operation_new(num_vars);
+ if (oper->children == NULL) {
+ slang_info_log_memory(C->L);
+ RETURN0;
+ }
+ for (i = first_var; i < O->vars->num_variables; i++) {
+ slang_operation *o = &oper->children[i - first_var];
+ slang_variable *var = O->vars->variables[i];
+ o->type = SLANG_OPER_VARIABLE_DECL;
+ o->locals->outer_scope = O->vars;
+ o->a_id = var->a_name;
+
+ /* new/someday...
+ calculate_var_size(C, O, var);
+ */
+
+ if (!legal_identifier(o->a_id)) {
+ slang_info_log_error(C->L, "illegal variable name '%s'",
+ (char *) o->a_id);
+ RETURN0;
+ }
+ }
+ }
+ }
+ break;
+ case OP_ASM:
+ /* the __asm statement, parse the mnemonic and all its arguments
+ * as expressions
+ */
+ oper->type = SLANG_OPER_ASM;
+ oper->a_id = parse_identifier(C);
+ if (oper->a_id == SLANG_ATOM_NULL)
+ RETURN0;
+ while (*C->I != OP_END) {
+ if (!parse_child_operation(C, O, oper, GL_FALSE))
+ RETURN0;
+ }
+ C->I++;
+ break;
+ case OP_BREAK:
+ oper->type = SLANG_OPER_BREAK;
+ break;
+ case OP_CONTINUE:
+ oper->type = SLANG_OPER_CONTINUE;
+ break;
+ case OP_DISCARD:
+ oper->type = SLANG_OPER_DISCARD;
+ break;
+ case OP_RETURN:
+ oper->type = SLANG_OPER_RETURN;
+ if (!parse_child_operation(C, O, oper, GL_FALSE))
+ RETURN0;
+ break;
+ case OP_EXPRESSION:
+ oper->type = SLANG_OPER_EXPRESSION;
+ if (!parse_child_operation(C, O, oper, GL_FALSE))
+ RETURN0;
+ break;
+ case OP_IF:
+ oper->type = SLANG_OPER_IF;
+ if (!parse_child_operation(C, O, oper, GL_FALSE))
+ RETURN0;
+ if (!parse_child_operation(C, O, oper, GL_TRUE))
+ RETURN0;
+ if (!parse_child_operation(C, O, oper, GL_TRUE))
+ RETURN0;
+ break;
+ case OP_WHILE:
+ {
+ slang_output_ctx o = *O;
+
+ oper->type = SLANG_OPER_WHILE;
+ o.vars = oper->locals;
+ if (!parse_child_operation(C, &o, oper, GL_TRUE))
+ RETURN0;
+ if (!parse_child_operation(C, &o, oper, GL_TRUE))
+ RETURN0;
+ }
+ break;
+ case OP_DO:
+ oper->type = SLANG_OPER_DO;
+ if (!parse_child_operation(C, O, oper, GL_TRUE))
+ RETURN0;
+ if (!parse_child_operation(C, O, oper, GL_FALSE))
+ RETURN0;
+ break;
+ case OP_FOR:
+ {
+ slang_output_ctx o = *O;
+
+ oper->type = SLANG_OPER_FOR;
+ o.vars = oper->locals;
+ if (!parse_child_operation(C, &o, oper, GL_TRUE))
+ RETURN0;
+ if (!parse_child_operation(C, &o, oper, GL_TRUE))
+ RETURN0;
+ if (!parse_child_operation(C, &o, oper, GL_FALSE))
+ RETURN0;
+ if (!parse_child_operation(C, &o, oper, GL_TRUE))
+ RETURN0;
+ }
+ break;
+ case OP_PRECISION:
+ {
+ /* set default precision for a type in this scope */
+ /* ignored at this time */
+ int prec_qual = *C->I++;
+ int datatype = *C->I++;
+ (void) prec_qual;
+ (void) datatype;
+ }
+ break;
+ default:
+ /*printf("Unexpected operation %d\n", op);*/
+ RETURN0;
+ }
+ return 1;
+}
+
+static int
+handle_nary_expression(slang_parse_ctx * C, slang_operation * op,
+ slang_operation ** ops, unsigned int *total_ops,
+ unsigned int n)
+{
+ unsigned int i;
+
+ op->children = slang_operation_new(n);
+ if (op->children == NULL) {
+ slang_info_log_memory(C->L);
+ RETURN0;
+ }
+ op->num_children = n;
+
+ for (i = 0; i < n; i++) {
+ slang_operation_destruct(&op->children[i]);
+ op->children[i] = (*ops)[*total_ops - (n + 1 - i)];
+ }
+
+ (*ops)[*total_ops - (n + 1)] = (*ops)[*total_ops - 1];
+ *total_ops -= n;
+
+ *ops = (slang_operation *)
+ _slang_realloc(*ops,
+ (*total_ops + n) * sizeof(slang_operation),
+ *total_ops * sizeof(slang_operation));
+ if (*ops == NULL) {
+ slang_info_log_memory(C->L);
+ RETURN0;
+ }
+ return 1;
+}
+
+static int
+is_constructor_name(const char *name, slang_atom a_name,
+ slang_struct_scope * structs)
+{
+ if (slang_type_specifier_type_from_string(name) != SLANG_SPEC_VOID)
+ return 1;
+ return slang_struct_scope_find(structs, a_name, 1) != NULL;
+}
+
+#define FUNCTION_CALL_NONARRAY 0
+#define FUNCTION_CALL_ARRAY 1
+
+static int
+parse_expression(slang_parse_ctx * C, slang_output_ctx * O,
+ slang_operation * oper)
+{
+ slang_operation *ops = NULL;
+ unsigned int num_ops = 0;
+ int number;
+
+ while (*C->I != OP_END) {
+ slang_operation *op;
+ const unsigned int op_code = *C->I++;
+
+ /* allocate default operation, becomes a no-op if not used */
+ ops = (slang_operation *)
+ _slang_realloc(ops,
+ num_ops * sizeof(slang_operation),
+ (num_ops + 1) * sizeof(slang_operation));
+ if (ops == NULL) {
+ slang_info_log_memory(C->L);
+ RETURN0;
+ }
+ op = &ops[num_ops];
+ if (!slang_operation_construct(op)) {
+ slang_info_log_memory(C->L);
+ RETURN0;
+ }
+ num_ops++;
+ op->locals->outer_scope = O->vars;
+
+ switch (op_code) {
+ case OP_PUSH_VOID:
+ op->type = SLANG_OPER_VOID;
+ break;
+ case OP_PUSH_BOOL:
+ op->type = SLANG_OPER_LITERAL_BOOL;
+ if (!parse_number(C, &number))
+ RETURN0;
+ op->literal[0] =
+ op->literal[1] =
+ op->literal[2] =
+ op->literal[3] = (GLfloat) number;
+ op->literal_size = 1;
+ break;
+ case OP_PUSH_INT:
+ op->type = SLANG_OPER_LITERAL_INT;
+ if (!parse_number(C, &number))
+ RETURN0;
+ op->literal[0] =
+ op->literal[1] =
+ op->literal[2] =
+ op->literal[3] = (GLfloat) number;
+ op->literal_size = 1;
+ break;
+ case OP_PUSH_FLOAT:
+ op->type = SLANG_OPER_LITERAL_FLOAT;
+ if (!parse_float(C, &op->literal[0]))
+ RETURN0;
+ op->literal[1] =
+ op->literal[2] =
+ op->literal[3] = op->literal[0];
+ op->literal_size = 1;
+ break;
+ case OP_PUSH_IDENTIFIER:
+ op->type = SLANG_OPER_IDENTIFIER;
+ op->a_id = parse_identifier(C);
+ if (op->a_id == SLANG_ATOM_NULL)
+ RETURN0;
+ break;
+ case OP_SEQUENCE:
+ op->type = SLANG_OPER_SEQUENCE;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ case OP_ASSIGN:
+ op->type = SLANG_OPER_ASSIGN;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ case OP_ADDASSIGN:
+ op->type = SLANG_OPER_ADDASSIGN;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ case OP_SUBASSIGN:
+ op->type = SLANG_OPER_SUBASSIGN;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ case OP_MULASSIGN:
+ op->type = SLANG_OPER_MULASSIGN;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ case OP_DIVASSIGN:
+ op->type = SLANG_OPER_DIVASSIGN;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ /*case OP_MODASSIGN: */
+ /*case OP_LSHASSIGN: */
+ /*case OP_RSHASSIGN: */
+ /*case OP_ORASSIGN: */
+ /*case OP_XORASSIGN: */
+ /*case OP_ANDASSIGN: */
+ case OP_SELECT:
+ op->type = SLANG_OPER_SELECT;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 3))
+ RETURN0;
+ break;
+ case OP_LOGICALOR:
+ op->type = SLANG_OPER_LOGICALOR;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ case OP_LOGICALXOR:
+ op->type = SLANG_OPER_LOGICALXOR;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ case OP_LOGICALAND:
+ op->type = SLANG_OPER_LOGICALAND;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ /*case OP_BITOR: */
+ /*case OP_BITXOR: */
+ /*case OP_BITAND: */
+ case OP_EQUAL:
+ op->type = SLANG_OPER_EQUAL;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ case OP_NOTEQUAL:
+ op->type = SLANG_OPER_NOTEQUAL;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ case OP_LESS:
+ op->type = SLANG_OPER_LESS;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ case OP_GREATER:
+ op->type = SLANG_OPER_GREATER;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ case OP_LESSEQUAL:
+ op->type = SLANG_OPER_LESSEQUAL;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ case OP_GREATEREQUAL:
+ op->type = SLANG_OPER_GREATEREQUAL;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ /*case OP_LSHIFT: */
+ /*case OP_RSHIFT: */
+ case OP_ADD:
+ op->type = SLANG_OPER_ADD;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ case OP_SUBTRACT:
+ op->type = SLANG_OPER_SUBTRACT;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ case OP_MULTIPLY:
+ op->type = SLANG_OPER_MULTIPLY;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ case OP_DIVIDE:
+ op->type = SLANG_OPER_DIVIDE;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ /*case OP_MODULUS: */
+ case OP_PREINCREMENT:
+ op->type = SLANG_OPER_PREINCREMENT;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
+ RETURN0;
+ break;
+ case OP_PREDECREMENT:
+ op->type = SLANG_OPER_PREDECREMENT;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
+ RETURN0;
+ break;
+ case OP_PLUS:
+ op->type = SLANG_OPER_PLUS;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
+ RETURN0;
+ break;
+ case OP_MINUS:
+ op->type = SLANG_OPER_MINUS;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
+ RETURN0;
+ break;
+ case OP_NOT:
+ op->type = SLANG_OPER_NOT;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
+ RETURN0;
+ break;
+ /*case OP_COMPLEMENT: */
+ case OP_SUBSCRIPT:
+ op->type = SLANG_OPER_SUBSCRIPT;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
+ RETURN0;
+ break;
+ case OP_METHOD:
+ op->type = SLANG_OPER_METHOD;
+ op->a_obj = parse_identifier(C);
+ if (op->a_obj == SLANG_ATOM_NULL)
+ RETURN0;
+
+ op->a_id = parse_identifier(C);
+ if (op->a_id == SLANG_ATOM_NULL)
+ RETURN0;
+
+ assert(*C->I == OP_END);
+ C->I++;
+
+ while (*C->I != OP_END)
+ if (!parse_child_operation(C, O, op, GL_FALSE))
+ RETURN0;
+ C->I++;
+#if 0
+ /* don't lookup the method (not yet anyway) */
+ if (!C->parsing_builtin
+ && !slang_function_scope_find_by_name(O->funs, op->a_id, 1)) {
+ const char *id;
+
+ id = slang_atom_pool_id(C->atoms, op->a_id);
+ if (!is_constructor_name(id, op->a_id, O->structs)) {
+ slang_info_log_error(C->L, "%s: undeclared function name.", id);
+ RETURN0;
+ }
+ }
+#endif
+ break;
+ case OP_CALL:
+ {
+ GLboolean array_constructor = GL_FALSE;
+ GLint array_constructor_size = 0;
+
+ op->type = SLANG_OPER_CALL;
+ op->a_id = parse_identifier(C);
+ if (op->a_id == SLANG_ATOM_NULL)
+ RETURN0;
+ switch (*C->I++) {
+ case FUNCTION_CALL_NONARRAY:
+ /* Nothing to do. */
+ break;
+ case FUNCTION_CALL_ARRAY:
+ /* Calling an array constructor. For example:
+ * float[3](1.1, 2.2, 3.3);
+ */
+ if (!O->allow_array_types) {
+ slang_info_log_error(C->L,
+ "array constructors not allowed "
+ "in this GLSL version");
+ RETURN0;
+ }
+ else {
+ /* parse the array constructor size */
+ slang_operation array_size;
+ array_constructor = GL_TRUE;
+ slang_operation_construct(&array_size);
+ if (!parse_expression(C, O, &array_size)) {
+ slang_operation_destruct(&array_size);
+ return GL_FALSE;
+ }
+ if (array_size.type != SLANG_OPER_LITERAL_INT) {
+ slang_info_log_error(C->L,
+ "constructor array size is not an integer");
+ slang_operation_destruct(&array_size);
+ RETURN0;
+ }
+ array_constructor_size = (int) array_size.literal[0];
+ op->array_constructor = GL_TRUE;
+ slang_operation_destruct(&array_size);
+ }
+ break;
+ default:
+ assert(0);
+ RETURN0;
+ }
+ while (*C->I != OP_END)
+ if (!parse_child_operation(C, O, op, GL_FALSE))
+ RETURN0;
+ C->I++;
+
+ if (array_constructor &&
+ array_constructor_size != op->num_children) {
+ slang_info_log_error(C->L, "number of parameters to array"
+ " constructor does not match array size");
+ RETURN0;
+ }
+
+ if (!C->parsing_builtin
+ && !slang_function_scope_find_by_name(O->funs, op->a_id, 1)) {
+ const char *id;
+
+ id = slang_atom_pool_id(C->atoms, op->a_id);
+ if (!is_constructor_name(id, op->a_id, O->structs)) {
+ slang_info_log_error(C->L, "%s: undeclared function name.", id);
+ RETURN0;
+ }
+ }
+ }
+ break;
+ case OP_FIELD:
+ op->type = SLANG_OPER_FIELD;
+ op->a_id = parse_identifier(C);
+ if (op->a_id == SLANG_ATOM_NULL)
+ RETURN0;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
+ RETURN0;
+ break;
+ case OP_POSTINCREMENT:
+ op->type = SLANG_OPER_POSTINCREMENT;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
+ RETURN0;
+ break;
+ case OP_POSTDECREMENT:
+ op->type = SLANG_OPER_POSTDECREMENT;
+ if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
+ RETURN0;
+ break;
+ default:
+ RETURN0;
+ }
+ }
+ C->I++;
+
+ slang_operation_destruct(oper);
+ *oper = *ops; /* struct copy */
+ _slang_free(ops);
+
+ return 1;
+}
+
+/* parameter qualifier */
+#define PARAM_QUALIFIER_IN 0
+#define PARAM_QUALIFIER_OUT 1
+#define PARAM_QUALIFIER_INOUT 2
+
+/* function parameter array presence */
+#define PARAMETER_ARRAY_NOT_PRESENT 0
+#define PARAMETER_ARRAY_PRESENT 1
+
+static int
+parse_parameter_declaration(slang_parse_ctx * C, slang_output_ctx * O,
+ slang_variable * param)
+{
+ int param_qual, precision_qual;
+
+ /* parse and validate the parameter's type qualifiers (there can be
+ * two at most) because not all combinations are valid
+ */
+ if (!parse_type_qualifier(C, &param->type.qualifier))
+ RETURN0;
+
+ param_qual = *C->I++;
+ switch (param_qual) {
+ case PARAM_QUALIFIER_IN:
+ if (param->type.qualifier != SLANG_QUAL_CONST
+ && param->type.qualifier != SLANG_QUAL_NONE) {
+ slang_info_log_error(C->L, "Invalid type qualifier.");
+ RETURN0;
+ }
+ break;
+ case PARAM_QUALIFIER_OUT:
+ if (param->type.qualifier == SLANG_QUAL_NONE)
+ param->type.qualifier = SLANG_QUAL_OUT;
+ else {
+ slang_info_log_error(C->L, "Invalid type qualifier.");
+ RETURN0;
+ }
+ break;
+ case PARAM_QUALIFIER_INOUT:
+ if (param->type.qualifier == SLANG_QUAL_NONE)
+ param->type.qualifier = SLANG_QUAL_INOUT;
+ else {
+ slang_info_log_error(C->L, "Invalid type qualifier.");
+ RETURN0;
+ }
+ break;
+ default:
+ RETURN0;
+ }
+
+ /* parse precision qualifier (lowp, mediump, highp */
+ precision_qual = *C->I++;
+ /* ignored at this time */
+ (void) precision_qual;
+
+ /* parse parameter's type specifier and name */
+ if (!parse_type_specifier(C, O, &param->type.specifier))
+ RETURN0;
+ if (!parse_type_array_size(C, O, &param->type.array_len))
+ RETURN0;
+ param->a_name = parse_identifier(C);
+ if (param->a_name == SLANG_ATOM_NULL)
+ RETURN0;
+
+ /* first-class array
+ */
+ if (param->type.array_len >= 0) {
+ slang_type_specifier p;
+
+ slang_type_specifier_ctr(&p);
+ if (!slang_type_specifier_copy(&p, &param->type.specifier)) {
+ slang_type_specifier_dtr(&p);
+ RETURN0;
+ }
+ if (!convert_to_array(C, param, &p)) {
+ slang_type_specifier_dtr(&p);
+ RETURN0;
+ }
+ slang_type_specifier_dtr(&p);
+ param->array_len = param->type.array_len;
+ }
+
+ /* if the parameter is an array, parse its size (the size must be
+ * explicitly defined
+ */
+ if (*C->I++ == PARAMETER_ARRAY_PRESENT) {
+ slang_type_specifier p;
+
+ if (param->type.array_len >= 0) {
+ slang_info_log_error(C->L, "multi-dimensional arrays not allowed");
+ RETURN0;
+ }
+ slang_type_specifier_ctr(&p);
+ if (!slang_type_specifier_copy(&p, &param->type.specifier)) {
+ slang_type_specifier_dtr(&p);
+ RETURN0;
+ }
+ if (!convert_to_array(C, param, &p)) {
+ slang_type_specifier_dtr(&p);
+ RETURN0;
+ }
+ slang_type_specifier_dtr(&p);
+ if (!parse_array_len(C, O, &param->array_len))
+ RETURN0;
+ }
+
+#if 0
+ /* calculate the parameter size */
+ if (!calculate_var_size(C, O, param))
+ RETURN0;
+#endif
+ /* TODO: allocate the local address here? */
+ return 1;
+}
+
+/* function type */
+#define FUNCTION_ORDINARY 0
+#define FUNCTION_CONSTRUCTOR 1
+#define FUNCTION_OPERATOR 2
+
+/* function parameter */
+#define PARAMETER_NONE 0
+#define PARAMETER_NEXT 1
+
+/* operator type */
+#define OPERATOR_ADDASSIGN 1
+#define OPERATOR_SUBASSIGN 2
+#define OPERATOR_MULASSIGN 3
+#define OPERATOR_DIVASSIGN 4
+/*#define OPERATOR_MODASSIGN 5*/
+/*#define OPERATOR_LSHASSIGN 6*/
+/*#define OPERATOR_RSHASSIGN 7*/
+/*#define OPERATOR_ANDASSIGN 8*/
+/*#define OPERATOR_XORASSIGN 9*/
+/*#define OPERATOR_ORASSIGN 10*/
+#define OPERATOR_LOGICALXOR 11
+/*#define OPERATOR_BITOR 12*/
+/*#define OPERATOR_BITXOR 13*/
+/*#define OPERATOR_BITAND 14*/
+#define OPERATOR_LESS 15
+#define OPERATOR_GREATER 16
+#define OPERATOR_LESSEQUAL 17
+#define OPERATOR_GREATEREQUAL 18
+/*#define OPERATOR_LSHIFT 19*/
+/*#define OPERATOR_RSHIFT 20*/
+#define OPERATOR_MULTIPLY 21
+#define OPERATOR_DIVIDE 22
+/*#define OPERATOR_MODULUS 23*/
+#define OPERATOR_INCREMENT 24
+#define OPERATOR_DECREMENT 25
+#define OPERATOR_PLUS 26
+#define OPERATOR_MINUS 27
+/*#define OPERATOR_COMPLEMENT 28*/
+#define OPERATOR_NOT 29
+
+static const struct
+{
+ unsigned int o_code;
+ const char *o_name;
+} operator_names[] = {
+ {OPERATOR_INCREMENT, "++"},
+ {OPERATOR_ADDASSIGN, "+="},
+ {OPERATOR_PLUS, "+"},
+ {OPERATOR_DECREMENT, "--"},
+ {OPERATOR_SUBASSIGN, "-="},
+ {OPERATOR_MINUS, "-"},
+ {OPERATOR_NOT, "!"},
+ {OPERATOR_MULASSIGN, "*="},
+ {OPERATOR_MULTIPLY, "*"},
+ {OPERATOR_DIVASSIGN, "/="},
+ {OPERATOR_DIVIDE, "/"},
+ {OPERATOR_LESSEQUAL, "<="},
+ /*{ OPERATOR_LSHASSIGN, "<<=" }, */
+ /*{ OPERATOR_LSHIFT, "<<" }, */
+ {OPERATOR_LESS, "<"},
+ {OPERATOR_GREATEREQUAL, ">="},
+ /*{ OPERATOR_RSHASSIGN, ">>=" }, */
+ /*{ OPERATOR_RSHIFT, ">>" }, */
+ {OPERATOR_GREATER, ">"},
+ /*{ OPERATOR_MODASSIGN, "%=" }, */
+ /*{ OPERATOR_MODULUS, "%" }, */
+ /*{ OPERATOR_ANDASSIGN, "&=" }, */
+ /*{ OPERATOR_BITAND, "&" }, */
+ /*{ OPERATOR_ORASSIGN, "|=" }, */
+ /*{ OPERATOR_BITOR, "|" }, */
+ /*{ OPERATOR_COMPLEMENT, "~" }, */
+ /*{ OPERATOR_XORASSIGN, "^=" }, */
+ {OPERATOR_LOGICALXOR, "^^"},
+ /*{ OPERATOR_BITXOR, "^" } */
+};
+
+static slang_atom
+parse_operator_name(slang_parse_ctx * C)
+{
+ unsigned int i;
+
+ for (i = 0; i < sizeof(operator_names) / sizeof(*operator_names); i++) {
+ if (operator_names[i].o_code == (unsigned int) (*C->I)) {
+ slang_atom atom =
+ slang_atom_pool_atom(C->atoms, operator_names[i].o_name);
+ if (atom == SLANG_ATOM_NULL) {
+ slang_info_log_memory(C->L);
+ RETURN0;
+ }
+ C->I++;
+ return atom;
+ }
+ }
+ RETURN0;
+}
+
+
+static int
+parse_function_prototype(slang_parse_ctx * C, slang_output_ctx * O,
+ slang_function * func)
+{
+ GLuint functype;
+ /* parse function type and name */
+ if (!parse_fully_specified_type(C, O, &func->header.type))
+ RETURN0;
+
+ functype = *C->I++;
+ switch (functype) {
+ case FUNCTION_ORDINARY:
+ func->kind = SLANG_FUNC_ORDINARY;
+ func->header.a_name = parse_identifier(C);
+ if (func->header.a_name == SLANG_ATOM_NULL)
+ RETURN0;
+ break;
+ case FUNCTION_CONSTRUCTOR:
+ func->kind = SLANG_FUNC_CONSTRUCTOR;
+ if (func->header.type.specifier.type == SLANG_SPEC_STRUCT)
+ RETURN0;
+ func->header.a_name =
+ slang_atom_pool_atom(C->atoms,
+ slang_type_specifier_type_to_string
+ (func->header.type.specifier.type));
+ if (func->header.a_name == SLANG_ATOM_NULL) {
+ slang_info_log_memory(C->L);
+ RETURN0;
+ }
+ break;
+ case FUNCTION_OPERATOR:
+ func->kind = SLANG_FUNC_OPERATOR;
+ func->header.a_name = parse_operator_name(C);
+ if (func->header.a_name == SLANG_ATOM_NULL)
+ RETURN0;
+ break;
+ default:
+ RETURN0;
+ }
+
+ if (!legal_identifier(func->header.a_name)) {
+ slang_info_log_error(C->L, "illegal function name '%s'",
+ (char *) func->header.a_name);
+ RETURN0;
+ }
+
+ /* parse function parameters */
+ while (*C->I++ == PARAMETER_NEXT) {
+ slang_variable *p = slang_variable_scope_grow(func->parameters);
+ if (!p) {
+ slang_info_log_memory(C->L);
+ RETURN0;
+ }
+ if (!parse_parameter_declaration(C, O, p))
+ RETURN0;
+ }
+
+ /* if the function returns a value, append a hidden __retVal 'out'
+ * parameter that corresponds to the return value.
+ */
+ if (_slang_function_has_return_value(func)) {
+ slang_variable *p = slang_variable_scope_grow(func->parameters);
+ slang_atom a_retVal = slang_atom_pool_atom(C->atoms, "__retVal");
+ assert(a_retVal);
+ p->a_name = a_retVal;
+ p->type = func->header.type;
+ p->type.qualifier = SLANG_QUAL_OUT;
+ }
+
+ /* function formal parameters and local variables share the same
+ * scope, so save the information about param count in a seperate
+ * place also link the scope to the global variable scope so when a
+ * given identifier is not found here, the search process continues
+ * in the global space
+ */
+ func->param_count = func->parameters->num_variables;
+ func->parameters->outer_scope = O->vars;
+
+ return 1;
+}
+
+static int
+parse_function_definition(slang_parse_ctx * C, slang_output_ctx * O,
+ slang_function * func)
+{
+ slang_output_ctx o = *O;
+
+ if (!parse_function_prototype(C, O, func))
+ RETURN0;
+
+ /* create function's body operation */
+ func->body = (slang_operation *) _slang_alloc(sizeof(slang_operation));
+ if (func->body == NULL) {
+ slang_info_log_memory(C->L);
+ RETURN0;
+ }
+ if (!slang_operation_construct(func->body)) {
+ _slang_free(func->body);
+ func->body = NULL;
+ slang_info_log_memory(C->L);
+ RETURN0;
+ }
+
+ /* to parse the body the parse context is modified in order to
+ * capture parsed variables into function's local variable scope
+ */
+ C->global_scope = GL_FALSE;
+ o.vars = func->parameters;
+ if (!parse_statement(C, &o, func->body))
+ RETURN0;
+
+ C->global_scope = GL_TRUE;
+ return 1;
+}
+
+static GLboolean
+initialize_global(slang_assemble_ctx * A, slang_variable * var)
+{
+ slang_operation op_id, op_assign;
+ GLboolean result;
+
+ /* construct the left side of assignment */
+ if (!slang_operation_construct(&op_id))
+ return GL_FALSE;
+ op_id.type = SLANG_OPER_IDENTIFIER;
+ op_id.a_id = var->a_name;
+
+ /* put the variable into operation's scope */
+ op_id.locals->variables =
+ (slang_variable **) _slang_alloc(sizeof(slang_variable *));
+ if (op_id.locals->variables == NULL) {
+ slang_operation_destruct(&op_id);
+ return GL_FALSE;
+ }
+ op_id.locals->num_variables = 1;
+ op_id.locals->variables[0] = var;
+
+ /* construct the assignment expression */
+ if (!slang_operation_construct(&op_assign)) {
+ op_id.locals->num_variables = 0;
+ slang_operation_destruct(&op_id);
+ return GL_FALSE;
+ }
+ op_assign.type = SLANG_OPER_ASSIGN;
+ op_assign.children =
+ (slang_operation *) _slang_alloc(2 * sizeof(slang_operation));
+ if (op_assign.children == NULL) {
+ slang_operation_destruct(&op_assign);
+ op_id.locals->num_variables = 0;
+ slang_operation_destruct(&op_id);
+ return GL_FALSE;
+ }
+ op_assign.num_children = 2;
+ op_assign.children[0] = op_id;
+ op_assign.children[1] = *var->initializer;
+
+ result = 1;
+
+ /* carefully destroy the operations */
+ op_assign.num_children = 0;
+ _slang_free(op_assign.children);
+ op_assign.children = NULL;
+ slang_operation_destruct(&op_assign);
+ op_id.locals->num_variables = 0;
+ slang_operation_destruct(&op_id);
+
+ if (!result)
+ return GL_FALSE;
+
+ return GL_TRUE;
+}
+
+/* init declarator list */
+#define DECLARATOR_NONE 0
+#define DECLARATOR_NEXT 1
+
+/* variable declaration */
+#define VARIABLE_NONE 0
+#define VARIABLE_IDENTIFIER 1
+#define VARIABLE_INITIALIZER 2
+#define VARIABLE_ARRAY_EXPLICIT 3
+#define VARIABLE_ARRAY_UNKNOWN 4
+
+
+/**
+ * Parse the initializer for a variable declaration.
+ */
+static int
+parse_init_declarator(slang_parse_ctx * C, slang_output_ctx * O,
+ const slang_fully_specified_type * type)
+{
+ GET_CURRENT_CONTEXT(ctx); /* a hack */
+ slang_variable *var;
+ slang_atom a_name;
+
+ /* empty init declatator (without name, e.g. "float ;") */
+ if (*C->I++ == VARIABLE_NONE)
+ return 1;
+
+ a_name = parse_identifier(C);
+
+ /* check if name is already in this scope */
+ if (_slang_variable_locate(O->vars, a_name, GL_FALSE)) {
+ slang_info_log_error(C->L,
+ "declaration of '%s' conflicts with previous declaration",
+ (char *) a_name);
+ RETURN0;
+ }
+
+ /* make room for the new variable and initialize it */
+ var = slang_variable_scope_grow(O->vars);
+ if (!var) {
+ slang_info_log_memory(C->L);
+ RETURN0;
+ }
+
+ /* copy the declarator type qualifier/etc info, parse the identifier */
+ var->type.qualifier = type->qualifier;
+ var->type.centroid = type->centroid;
+ var->type.precision = type->precision;
+ var->type.variant = type->variant;
+ var->type.array_len = type->array_len;
+ var->a_name = a_name;
+ if (var->a_name == SLANG_ATOM_NULL)
+ RETURN0;
+
+ switch (*C->I++) {
+ case VARIABLE_NONE:
+ /* simple variable declarator - just copy the specifier */
+ if (!slang_type_specifier_copy(&var->type.specifier, &type->specifier))
+ RETURN0;
+ break;
+ case VARIABLE_INITIALIZER:
+ /* initialized variable - copy the specifier and parse the expression */
+ if (0 && type->array_len >= 0) {
+ /* The type was something like "float[4]" */
+ convert_to_array(C, var, &type->specifier);
+ var->array_len = type->array_len;
+ }
+ else {
+ if (!slang_type_specifier_copy(&var->type.specifier, &type->specifier))
+ RETURN0;
+ }
+ var->initializer =
+ (slang_operation *) _slang_alloc(sizeof(slang_operation));
+ if (var->initializer == NULL) {
+ slang_info_log_memory(C->L);
+ RETURN0;
+ }
+ if (!slang_operation_construct(var->initializer)) {
+ _slang_free(var->initializer);
+ var->initializer = NULL;
+ slang_info_log_memory(C->L);
+ RETURN0;
+ }
+ if (!parse_expression(C, O, var->initializer))
+ RETURN0;
+ break;
+ case VARIABLE_ARRAY_UNKNOWN:
+ /* unsized array - mark it as array and copy the specifier to
+ * the array element
+ */
+ if (type->array_len >= 0) {
+ slang_info_log_error(C->L, "multi-dimensional arrays not allowed");
+ RETURN0;
+ }
+ if (!convert_to_array(C, var, &type->specifier))
+ return GL_FALSE;
+ break;
+ case VARIABLE_ARRAY_EXPLICIT:
+ if (type->array_len >= 0) {
+ /* the user is trying to do something like: float[2] x[3]; */
+ slang_info_log_error(C->L, "multi-dimensional arrays not allowed");
+ RETURN0;
+ }
+ if (!convert_to_array(C, var, &type->specifier))
+ return GL_FALSE;
+ if (!parse_array_len(C, O, &var->array_len))
+ return GL_FALSE;
+ break;
+ default:
+ RETURN0;
+ }
+
+ /* allocate global address space for a variable with a known size */
+ if (C->global_scope
+ && !(var->type.specifier.type == SLANG_SPEC_ARRAY
+ && var->array_len == 0)) {
+ if (!calculate_var_size(C, O, var))
+ return GL_FALSE;
+ }
+
+ /* emit code for global var decl */
+ if (C->global_scope) {
+ slang_assemble_ctx A;
+ memset(&A, 0, sizeof(slang_assemble_ctx));
+ A.atoms = C->atoms;
+ A.space.funcs = O->funs;
+ A.space.structs = O->structs;
+ A.space.vars = O->vars;
+ A.program = O->program;
+ A.pragmas = O->pragmas;
+ A.vartable = O->vartable;
+ A.log = C->L;
+ A.curFuncEndLabel = NULL;
+ A.EmitContReturn = ctx->Shader.EmitContReturn;
+ if (!_slang_codegen_global_variable(&A, var, C->type))
+ RETURN0;
+ }
+
+ /* initialize global variable */
+ if (C->global_scope) {
+ if (var->initializer != NULL) {
+ slang_assemble_ctx A;
+ memset(&A, 0, sizeof(slang_assemble_ctx));
+ A.atoms = C->atoms;
+ A.space.funcs = O->funs;
+ A.space.structs = O->structs;
+ A.space.vars = O->vars;
+ if (!initialize_global(&A, var))
+ RETURN0;
+ }
+ }
+ return 1;
+}
+
+/**
+ * Parse a list of variable declarations. Each variable may have an
+ * initializer.
+ */
+static int
+parse_init_declarator_list(slang_parse_ctx * C, slang_output_ctx * O)
+{
+ slang_fully_specified_type type;
+
+ /* parse the fully specified type, common to all declarators */
+ if (!slang_fully_specified_type_construct(&type))
+ RETURN0;
+ if (!parse_fully_specified_type(C, O, &type)) {
+ slang_fully_specified_type_destruct(&type);
+ RETURN0;
+ }
+
+ /* parse declarators, pass-in the parsed type */
+ do {
+ if (!parse_init_declarator(C, O, &type)) {
+ slang_fully_specified_type_destruct(&type);
+ RETURN0;
+ }
+ }
+ while (*C->I++ == DECLARATOR_NEXT);
+
+ slang_fully_specified_type_destruct(&type);
+ return 1;
+}
+
+
+/**
+ * Parse a function definition or declaration.
+ * \param C parsing context
+ * \param O output context
+ * \param definition if non-zero expect a definition, else a declaration
+ * \param parsed_func_ret returns the parsed function
+ * \return GL_TRUE if success, GL_FALSE if failure
+ */
+static GLboolean
+parse_function(slang_parse_ctx * C, slang_output_ctx * O, int definition,
+ slang_function ** parsed_func_ret)
+{
+ slang_function parsed_func, *found_func;
+
+ /* parse function definition/declaration */
+ if (!slang_function_construct(&parsed_func))
+ return GL_FALSE;
+ if (definition) {
+ if (!parse_function_definition(C, O, &parsed_func)) {
+ slang_function_destruct(&parsed_func);
+ return GL_FALSE;
+ }
+ }
+ else {
+ if (!parse_function_prototype(C, O, &parsed_func)) {
+ slang_function_destruct(&parsed_func);
+ return GL_FALSE;
+ }
+ }
+
+ /* find a function with a prototype matching the parsed one - only
+ * the current scope is being searched to allow built-in function
+ * overriding
+ */
+ found_func = slang_function_scope_find(O->funs, &parsed_func, 0);
+ if (found_func == NULL) {
+ /* New function, add it to the function list */
+ O->funs->functions =
+ (slang_function *) _slang_realloc(O->funs->functions,
+ O->funs->num_functions
+ * sizeof(slang_function),
+ (O->funs->num_functions + 1)
+ * sizeof(slang_function));
+ if (O->funs->functions == NULL) {
+ /* Make sure that there are no functions marked, as the
+ * allocation is currently NULL, in order to avoid
+ * a potental segfault as we clean up later.
+ */
+ O->funs->num_functions = 0;
+
+ slang_info_log_memory(C->L);
+ slang_function_destruct(&parsed_func);
+ return GL_FALSE;
+ }
+ O->funs->functions[O->funs->num_functions] = parsed_func;
+ O->funs->num_functions++;
+
+ /* return the newly parsed function */
+ *parsed_func_ret = &O->funs->functions[O->funs->num_functions - 1];
+ }
+ else {
+ /* previously defined or declared */
+ /* TODO: check function return type qualifiers and specifiers */
+ if (definition) {
+ if (found_func->body != NULL) {
+ slang_info_log_error(C->L, "%s: function already has a body.",
+ slang_atom_pool_id(C->atoms,
+ parsed_func.header.
+ a_name));
+ slang_function_destruct(&parsed_func);
+ return GL_FALSE;
+ }
+
+ /* destroy the existing function declaration and replace it
+ * with the new one
+ */
+ slang_function_destruct(found_func);
+ *found_func = parsed_func;
+ }
+ else {
+ /* another declaration of the same function prototype - ignore it */
+ slang_function_destruct(&parsed_func);
+ }
+
+ /* return the found function */
+ *parsed_func_ret = found_func;
+ }
+
+ return GL_TRUE;
+}
+
+/* declaration */
+#define DECLARATION_FUNCTION_PROTOTYPE 1
+#define DECLARATION_INIT_DECLARATOR_LIST 2
+
+static int
+parse_declaration(slang_parse_ctx * C, slang_output_ctx * O)
+{
+ switch (*C->I++) {
+ case DECLARATION_INIT_DECLARATOR_LIST:
+ if (!parse_init_declarator_list(C, O))
+ RETURN0;
+ break;
+ case DECLARATION_FUNCTION_PROTOTYPE:
+ {
+ slang_function *dummy_func;
+
+ if (!parse_function(C, O, 0, &dummy_func))
+ RETURN0;
+ }
+ break;
+ default:
+ RETURN0;
+ }
+ return 1;
+}
+
+static int
+parse_default_precision(slang_parse_ctx * C, slang_output_ctx * O)
+{
+ int precision, type;
+
+ if (!O->allow_precision) {
+ slang_info_log_error(C->L, "syntax error at \"precision\"");
+ RETURN0;
+ }
+
+ precision = *C->I++;
+ switch (precision) {
+ case PRECISION_LOW:
+ case PRECISION_MEDIUM:
+ case PRECISION_HIGH:
+ /* OK */
+ break;
+ default:
+ _mesa_problem(NULL, "unexpected precision %d at %s:%d\n",
+ precision, __FILE__, __LINE__);
+ RETURN0;
+ }
+
+ type = *C->I++;
+ switch (type) {
+ case TYPE_SPECIFIER_FLOAT:
+ case TYPE_SPECIFIER_INT:
+ case TYPE_SPECIFIER_SAMPLER1D:
+ case TYPE_SPECIFIER_SAMPLER2D:
+ case TYPE_SPECIFIER_SAMPLER3D:
+ case TYPE_SPECIFIER_SAMPLERCUBE:
+ case TYPE_SPECIFIER_SAMPLER1DSHADOW:
+ case TYPE_SPECIFIER_SAMPLER2DSHADOW:
+ case TYPE_SPECIFIER_SAMPLER2DRECT:
+ case TYPE_SPECIFIER_SAMPLER2DRECTSHADOW:
+ /* OK */
+ break;
+ default:
+ _mesa_problem(NULL, "unexpected type %d at %s:%d\n",
+ type, __FILE__, __LINE__);
+ RETURN0;
+ }
+
+ assert(type < TYPE_SPECIFIER_COUNT);
+ O->default_precision[type] = precision;
+
+ return 1;
+}
+
+
+/**
+ * Initialize the default precision for all types.
+ * XXX this info isn't used yet.
+ */
+static void
+init_default_precision(slang_output_ctx *O, slang_unit_type type)
+{
+ GLuint i;
+ for (i = 0; i < TYPE_SPECIFIER_COUNT; i++) {
+#if FEATURE_es2_glsl
+ O->default_precision[i] = PRECISION_LOW;
+#else
+ O->default_precision[i] = PRECISION_HIGH;
+#endif
+ }
+
+ if (type == SLANG_UNIT_VERTEX_SHADER) {
+ O->default_precision[TYPE_SPECIFIER_FLOAT] = PRECISION_HIGH;
+ O->default_precision[TYPE_SPECIFIER_INT] = PRECISION_HIGH;
+ }
+ else {
+ O->default_precision[TYPE_SPECIFIER_INT] = PRECISION_MEDIUM;
+ }
+}
+
+
+static int
+parse_invariant(slang_parse_ctx * C, slang_output_ctx * O)
+{
+ if (O->allow_invariant) {
+ slang_atom *a = parse_identifier(C);
+ /* XXX not doing anything with this var yet */
+ /*printf("ID: %s\n", (char*) a);*/
+ return a ? 1 : 0;
+ }
+ else {
+ slang_info_log_error(C->L, "syntax error at \"invariant\"");
+ RETURN0;
+ }
+}
+
+
+/* external declaration or default precision specifier */
+#define EXTERNAL_NULL 0
+#define EXTERNAL_FUNCTION_DEFINITION 1
+#define EXTERNAL_DECLARATION 2
+#define DEFAULT_PRECISION 3
+#define INVARIANT_STMT 4
+
+
+static GLboolean
+parse_code_unit(slang_parse_ctx * C, slang_code_unit * unit,
+ struct gl_shader *shader)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ slang_output_ctx o;
+ GLboolean success;
+ GLuint maxRegs;
+ slang_function *mainFunc = NULL;
+
+ if (unit->type == SLANG_UNIT_FRAGMENT_BUILTIN ||
+ unit->type == SLANG_UNIT_FRAGMENT_SHADER) {
+ maxRegs = ctx->Const.FragmentProgram.MaxTemps;
+ }
+ else {
+ assert(unit->type == SLANG_UNIT_VERTEX_BUILTIN ||
+ unit->type == SLANG_UNIT_VERTEX_SHADER);
+ maxRegs = ctx->Const.VertexProgram.MaxTemps;
+ }
+
+ /* setup output context */
+ o.funs = &unit->funs;
+ o.structs = &unit->structs;
+ o.vars = &unit->vars;
+ o.program = shader ? shader->Program : NULL;
+ o.pragmas = shader ? &shader->Pragmas : NULL;
+ o.vartable = _slang_new_var_table(maxRegs);
+ _slang_push_var_table(o.vartable);
+
+ /* allow 'invariant' keyword? */
+#if FEATURE_es2_glsl
+ o.allow_invariant = GL_TRUE;
+#else
+ o.allow_invariant = (C->version >= 120) ? GL_TRUE : GL_FALSE;
+#endif
+
+ /* allow 'centroid' keyword? */
+ o.allow_centroid = (C->version >= 120) ? GL_TRUE : GL_FALSE;
+
+ /* allow 'lowp/mediump/highp' keywords? */
+#if FEATURE_es2_glsl
+ o.allow_precision = GL_TRUE;
+#else
+ o.allow_precision = (C->version >= 120) ? GL_TRUE : GL_FALSE;
+#endif
+ init_default_precision(&o, unit->type);
+
+ /* allow 'float[]' keyword? */
+ o.allow_array_types = (C->version >= 120) ? GL_TRUE : GL_FALSE;
+
+ /* parse individual functions and declarations */
+ while (*C->I != EXTERNAL_NULL) {
+ switch (*C->I++) {
+ case EXTERNAL_FUNCTION_DEFINITION:
+ {
+ slang_function *func;
+ success = parse_function(C, &o, 1, &func);
+ if (success &&
+ _mesa_strcmp((char *) func->header.a_name, "main") == 0) {
+ /* found main() */
+ mainFunc = func;
+ }
+ }
+ break;
+ case EXTERNAL_DECLARATION:
+ success = parse_declaration(C, &o);
+ break;
+ case DEFAULT_PRECISION:
+ success = parse_default_precision(C, &o);
+ break;
+ case INVARIANT_STMT:
+ success = parse_invariant(C, &o);
+ break;
+ default:
+ success = GL_FALSE;
+ }
+
+ if (!success) {
+ /* xxx free codegen */
+ _slang_pop_var_table(o.vartable);
+ return GL_FALSE;
+ }
+ }
+ C->I++;
+
+ if (mainFunc) {
+ /* assemble (generate code) for main() */
+ slang_assemble_ctx A;
+ memset(&A, 0, sizeof(slang_assemble_ctx));
+ A.atoms = C->atoms;
+ A.space.funcs = o.funs;
+ A.space.structs = o.structs;
+ A.space.vars = o.vars;
+ A.program = o.program;
+ A.pragmas = &shader->Pragmas;
+ A.vartable = o.vartable;
+ A.EmitContReturn = ctx->Shader.EmitContReturn;
+ A.log = C->L;
+
+ /* main() takes no parameters */
+ if (mainFunc->param_count > 0) {
+ slang_info_log_error(A.log, "main() takes no arguments");
+ return GL_FALSE;
+ }
+
+ _slang_codegen_function(&A, mainFunc);
+
+ shader->Main = GL_TRUE; /* this shader defines main() */
+
+ shader->UnresolvedRefs = A.UnresolvedRefs;
+ }
+
+ _slang_pop_var_table(o.vartable);
+ _slang_delete_var_table(o.vartable);
+
+ return GL_TRUE;
+}
+
+static GLboolean
+compile_binary(const byte * prod, slang_code_unit * unit,
+ GLuint version,
+ slang_unit_type type, slang_info_log * infolog,
+ slang_code_unit * builtin, slang_code_unit * downlink,
+ struct gl_shader *shader)
+{
+ slang_parse_ctx C;
+
+ unit->type = type;
+
+ /* setup parse context */
+ C.I = prod;
+ C.L = infolog;
+ C.parsing_builtin = (builtin == NULL);
+ C.global_scope = GL_TRUE;
+ C.atoms = &unit->object->atompool;
+ C.type = type;
+ C.version = version;
+
+ if (!check_revision(&C))
+ return GL_FALSE;
+
+ if (downlink != NULL) {
+ unit->vars.outer_scope = &downlink->vars;
+ unit->funs.outer_scope = &downlink->funs;
+ unit->structs.outer_scope = &downlink->structs;
+ }
+
+ /* parse translation unit */
+ return parse_code_unit(&C, unit, shader);
+}
+
+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,
+ struct gl_shader *shader,
+ const struct gl_extensions *extensions,
+ struct gl_sl_pragmas *pragmas)
+{
+ byte *prod;
+ GLuint size, start, version;
+ slang_string preprocessed;
+ GLuint maxVersion;
+
+#if FEATURE_ARB_shading_language_120
+ maxVersion = 120;
+#elif FEATURE_es2_glsl
+ maxVersion = 100;
+#else
+ maxVersion = 110;
+#endif
+
+ /* First retrieve the version number. */
+ if (!_slang_preprocess_version(source, &version, &start, infolog))
+ return GL_FALSE;
+
+ if (version > maxVersion) {
+ slang_info_log_error(infolog,
+ "language version %.2f is not supported.",
+ version * 0.01);
+ return GL_FALSE;
+ }
+
+ /* Now preprocess the source string. */
+ slang_string_init(&preprocessed);
+ if (!_slang_preprocess_directives(&preprocessed, &source[start],
+ infolog, extensions, pragmas)) {
+ 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);
+ /* syntax error (possibly in library code) */
+#if 0
+ {
+ int line, col;
+ char *s;
+ s = (char *) _mesa_find_line_column((const GLubyte *) source,
+ (const GLubyte *) source + pos,
+ &line, &col);
+ printf("Error on line %d, col %d: %s\n", line, col, s);
+ }
+#endif
+ return GL_FALSE;
+ }
+ slang_string_free(&preprocessed);
+
+ /* Syntax is okay - translate it to internal representation. */
+ if (!compile_binary(prod, unit, version, type, infolog, builtin,
+ &builtin[SLANG_BUILTIN_TOTAL - 1],
+ shader)) {
+ grammar_alloc_free(prod);
+ return GL_FALSE;
+ }
+ grammar_alloc_free(prod);
+ return GL_TRUE;
+}
+
+LONGSTRING static const char *slang_shader_syn =
+#include "library/slang_shader_syn.h"
+ ;
+
+static const byte slang_core_gc[] = {
+#include "library/slang_core_gc.h"
+};
+
+static const byte slang_120_core_gc[] = {
+#include "library/slang_120_core_gc.h"
+};
+
+static const byte slang_120_fragment_gc[] = {
+#include "library/slang_builtin_120_fragment_gc.h"
+};
+
+static const byte slang_common_builtin_gc[] = {
+#include "library/slang_common_builtin_gc.h"
+};
+
+static const byte slang_fragment_builtin_gc[] = {
+#include "library/slang_fragment_builtin_gc.h"
+};
+
+static const byte slang_vertex_builtin_gc[] = {
+#include "library/slang_vertex_builtin_gc.h"
+};
+
+static GLboolean
+compile_object(grammar * id, const char *source, slang_code_object * object,
+ slang_unit_type type, slang_info_log * infolog,
+ struct gl_shader *shader,
+ const struct gl_extensions *extensions,
+ struct gl_sl_pragmas *pragmas)
+{
+ slang_code_unit *builtins = NULL;
+ GLuint base_version = 110;
+
+ /* load GLSL grammar */
+ *id = grammar_load_from_text((const byte *) (slang_shader_syn));
+ if (*id == 0) {
+ byte buf[1024];
+ int pos;
+
+ grammar_get_last_error(buf, 1024, &pos);
+ slang_info_log_error(infolog, (const char *) (buf));
+ return GL_FALSE;
+ }
+
+ /* set shader type - the syntax is slightly different for different shaders */
+ if (type == SLANG_UNIT_FRAGMENT_SHADER
+ || type == SLANG_UNIT_FRAGMENT_BUILTIN)
+ grammar_set_reg8(*id, (const byte *) "shader_type", 1);
+ else
+ grammar_set_reg8(*id, (const byte *) "shader_type", 2);
+
+ /* enable language extensions */
+ grammar_set_reg8(*id, (const byte *) "parsing_builtin", 1);
+
+ /* if parsing user-specified shader, load built-in library */
+ if (type == SLANG_UNIT_FRAGMENT_SHADER || type == SLANG_UNIT_VERTEX_SHADER) {
+ /* compile core functionality first */
+ if (!compile_binary(slang_core_gc,
+ &object->builtin[SLANG_BUILTIN_CORE],
+ base_version,
+ SLANG_UNIT_FRAGMENT_BUILTIN, infolog,
+ NULL, NULL, NULL))
+ return GL_FALSE;
+
+#if FEATURE_ARB_shading_language_120
+ if (!compile_binary(slang_120_core_gc,
+ &object->builtin[SLANG_BUILTIN_120_CORE],
+ 120,
+ SLANG_UNIT_FRAGMENT_BUILTIN, infolog,
+ NULL, &object->builtin[SLANG_BUILTIN_CORE], NULL))
+ return GL_FALSE;
+#endif
+
+ /* compile common functions and variables, link to core */
+ if (!compile_binary(slang_common_builtin_gc,
+ &object->builtin[SLANG_BUILTIN_COMMON],
+#if FEATURE_ARB_shading_language_120
+ 120,
+#else
+ base_version,
+#endif
+ SLANG_UNIT_FRAGMENT_BUILTIN, infolog, NULL,
+#if FEATURE_ARB_shading_language_120
+ &object->builtin[SLANG_BUILTIN_120_CORE],
+#else
+ &object->builtin[SLANG_BUILTIN_CORE],
+#endif
+ NULL))
+ return GL_FALSE;
+
+ /* compile target-specific functions and variables, link to common */
+ if (type == SLANG_UNIT_FRAGMENT_SHADER) {
+ if (!compile_binary(slang_fragment_builtin_gc,
+ &object->builtin[SLANG_BUILTIN_TARGET],
+ base_version,
+ SLANG_UNIT_FRAGMENT_BUILTIN, infolog, NULL,
+ &object->builtin[SLANG_BUILTIN_COMMON], NULL))
+ return GL_FALSE;
+#if FEATURE_ARB_shading_language_120
+ if (!compile_binary(slang_120_fragment_gc,
+ &object->builtin[SLANG_BUILTIN_TARGET],
+ 120,
+ SLANG_UNIT_FRAGMENT_BUILTIN, infolog, NULL,
+ &object->builtin[SLANG_BUILTIN_COMMON], NULL))
+ return GL_FALSE;
+#endif
+ }
+ else if (type == SLANG_UNIT_VERTEX_SHADER) {
+ if (!compile_binary(slang_vertex_builtin_gc,
+ &object->builtin[SLANG_BUILTIN_TARGET],
+ base_version,
+ SLANG_UNIT_VERTEX_BUILTIN, infolog, NULL,
+ &object->builtin[SLANG_BUILTIN_COMMON], NULL))
+ return GL_FALSE;
+ }
+
+ /* disable language extensions */
+#if NEW_SLANG /* allow-built-ins */
+ grammar_set_reg8(*id, (const byte *) "parsing_builtin", 1);
+#else
+ grammar_set_reg8(*id, (const byte *) "parsing_builtin", 0);
+#endif
+ builtins = object->builtin;
+ }
+
+ /* compile the actual shader - pass-in built-in library for external shader */
+ return compile_with_grammar(*id, source, &object->unit, type, infolog,
+ builtins, shader, extensions, pragmas);
+}
+
+
+static GLboolean
+compile_shader(GLcontext *ctx, slang_code_object * object,
+ slang_unit_type type, slang_info_log * infolog,
+ struct gl_shader *shader)
+{
+ GLboolean success;
+ grammar id = 0;
+
+#if 0 /* for debug */
+ _mesa_printf("********* COMPILE SHADER ***********\n");
+ _mesa_printf("%s\n", shader->Source);
+ _mesa_printf("************************************\n");
+#endif
+
+ assert(shader->Program);
+
+ _slang_code_object_dtr(object);
+ _slang_code_object_ctr(object);
+
+ success = compile_object(&id, shader->Source, object, type, infolog, shader,
+ &ctx->Extensions, &shader->Pragmas);
+ if (id != 0)
+ grammar_destroy(id);
+ if (!success)
+ return GL_FALSE;
+
+ return GL_TRUE;
+}
+
+
+
+GLboolean
+_slang_compile(GLcontext *ctx, struct gl_shader *shader)
+{
+ GLboolean success;
+ slang_info_log info_log;
+ slang_code_object obj;
+ slang_unit_type type;
+
+ if (shader->Type == GL_VERTEX_SHADER) {
+ type = SLANG_UNIT_VERTEX_SHADER;
+ }
+ else {
+ assert(shader->Type == GL_FRAGMENT_SHADER);
+ type = SLANG_UNIT_FRAGMENT_SHADER;
+ }
+
+ if (!shader->Source)
+ return GL_FALSE;
+
+ ctx->Shader.MemPool = _slang_new_mempool(1024*1024);
+
+ shader->Main = GL_FALSE;
+
+ if (!shader->Program) {
+ GLenum progTarget;
+ if (shader->Type == GL_VERTEX_SHADER)
+ progTarget = GL_VERTEX_PROGRAM_ARB;
+ else
+ progTarget = GL_FRAGMENT_PROGRAM_ARB;
+ shader->Program = ctx->Driver.NewProgram(ctx, progTarget, 1);
+ shader->Program->Parameters = _mesa_new_parameter_list();
+ shader->Program->Varying = _mesa_new_parameter_list();
+ shader->Program->Attributes = _mesa_new_parameter_list();
+ }
+
+ slang_info_log_construct(&info_log);
+ _slang_code_object_ctr(&obj);
+
+ success = compile_shader(ctx, &obj, type, &info_log, shader);
+
+ /* free shader's prev info log */
+ if (shader->InfoLog) {
+ _mesa_free(shader->InfoLog);
+ shader->InfoLog = NULL;
+ }
+
+ if (info_log.text) {
+ /* copy info-log string to shader object */
+ shader->InfoLog = _mesa_strdup(info_log.text);
+ }
+
+ if (info_log.error_flag) {
+ success = GL_FALSE;
+ }
+
+ slang_info_log_destruct(&info_log);
+ _slang_code_object_dtr(&obj);
+
+ _slang_delete_mempool((slang_mempool *) ctx->Shader.MemPool);
+ ctx->Shader.MemPool = NULL;
+
+ /* remove any reads of output registers */
+#if 0
+ printf("Pre-remove output reads:\n");
+ _mesa_print_program(shader->Program);
+#endif
+ _mesa_remove_output_reads(shader->Program, PROGRAM_OUTPUT);
+ if (shader->Type == GL_VERTEX_SHADER) {
+ /* and remove writes to varying vars in vertex programs */
+ _mesa_remove_output_reads(shader->Program, PROGRAM_VARYING);
+ }
+#if 0
+ printf("Post-remove output reads:\n");
+ _mesa_print_program(shader->Program);
+#endif
+
+ shader->CompileStatus = success;
+
+ if (success) {
+ if (shader->Pragmas.Optimize &&
+ (ctx->Shader.Flags & GLSL_NO_OPT) == 0) {
+ _mesa_optimize_program(ctx, shader->Program);
+ }
+ }
+
+ if (ctx->Shader.Flags & GLSL_LOG) {
+ _mesa_write_shader_to_file(shader);
+ }
+
+ return success;
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-03 14:23:11 +0000