glsl: Add API to put default precision qualifiers in the symbol table

These have scoping rules that match the ones defined for other things such
as variables, so we want them in the symbol table.

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>

diff --git a/src/glsl/glsl_symbol_table.cpp b/src/glsl/glsl_symbol_table.cpp
index 536f0a3a8c23e319e1d3ef3956cc7653b4f747e0..6c682acf5604ecc441dd7af1a453fdd9e1be863f 100644 (file)
--- a/src/glsl/glsl_symbol_table.cpp
+++ b/src/glsl/glsl_symbol_table.cpp
@@ -23,6 +23,7 @@
  */
 
 #include "glsl_symbol_table.h"
+#include "ast.h"
 
 class symbol_table_entry {
 public:
@@ -201,6 +202,20 @@ bool glsl_symbol_table::add_function(ir_function *f)
    return _mesa_symbol_table_add_symbol(table, -1, f->name, entry) == 0;
 }
 
+bool glsl_symbol_table::add_default_precision_qualifier(const char *type_name,
+                                                        int precision)
+{
+   char *name = ralloc_asprintf(mem_ctx, "#default_precision_%s", type_name);
+
+   ast_type_specifier *default_specifier = new(mem_ctx) ast_type_specifier(name);
+   default_specifier->default_precision = precision;
+
+   symbol_table_entry *entry =
+      new(mem_ctx) symbol_table_entry(default_specifier);
+
+   return _mesa_symbol_table_add_symbol(table, -1, name, entry) == 0;
+}
+
 void glsl_symbol_table::add_global_function(ir_function *f)
 {
    symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(f);
@@ -234,6 +249,15 @@ ir_function *glsl_symbol_table::get_function(const char *name)
    return entry != NULL ? entry->f : NULL;
 }
 
+int glsl_symbol_table::get_default_precision_qualifier(const char *type_name)
+{
+   char *name = ralloc_asprintf(mem_ctx, "#default_precision_%s", type_name);
+   symbol_table_entry *entry = get_entry(name);
+   if (!entry)
+      return ast_precision_none;
+   return entry->a->default_precision;
+}
+
 symbol_table_entry *glsl_symbol_table::get_entry(const char *name)
 {
    return (symbol_table_entry *)

diff --git a/src/glsl/glsl_symbol_table.h b/src/glsl/glsl_symbol_table.h
index e32b88b8699592408e9743d5fffa56a14dcfa3ca..5d654e5e6a778eed89357bb2c6266247d295deb5 100644 (file)
--- a/src/glsl/glsl_symbol_table.h
+++ b/src/glsl/glsl_symbol_table.h
@@ -72,6 +72,7 @@ struct glsl_symbol_table {
    bool add_function(ir_function *f);
    bool add_interface(const char *name, const glsl_type *i,
                       enum ir_variable_mode mode);
+   bool add_default_precision_qualifier(const char *type_name, int precision);
    /*@}*/
 
    /**
@@ -88,6 +89,7 @@ struct glsl_symbol_table {
    ir_function *get_function(const char *name);
    const glsl_type *get_interface(const char *name,
                                   enum ir_variable_mode mode);
+   int get_default_precision_qualifier(const char *type_name);
    /*@}*/
 
    /**