[gtk+/wip/otte/shader: 19/51] gskslvariable: Store constness of variables

[Benjamin Otte <otte src gnome org>]

commit 8f824b0ac4d8a4d8892ca98978a8d4774cb24bd0
Author: Benjamin Otte <otte redhat com>
Date:   Tue Sep 26 05:02:29 2017 +0200

    gskslvariable: Store constness of variables

 gsk/gskslnode.c            |   17 +++++++++--------
 gsk/gskslprogram.c         |   16 ++++++++--------
 gsk/gskslvariable.c        |   13 ++++++++++++-
 gsk/gskslvariableprivate.h |    4 +++-
 4 files changed, 32 insertions(+), 18 deletions(-)
---
diff --git a/gsk/gskslnode.c b/gsk/gskslnode.c
index a6ec61a..fd74ab0 100644
--- a/gsk/gskslnode.c
+++ b/gsk/gskslnode.c
@@ -248,22 +248,27 @@ static const GskSlNodeClass GSK_SL_NODE_EXPRESSION = {
 static GskSlNode *
 gsk_sl_node_parse_declaration (GskSlScope        *scope,
                                GskSlPreprocessor *stream,
-                               GskSlPointerType  *type)
+                               GskSlDecorations  *decoration,
+                               GskSlType         *type)
 {
   GskSlNodeDeclaration *declaration;
+  GskSlPointerType *pointer_type;
   const GskSlToken *token;
 
   declaration = gsk_sl_node_new (GskSlNodeDeclaration, &GSK_SL_NODE_DECLARATION);
   
+  pointer_type = gsk_sl_pointer_type_new (type, TRUE, 
decoration->values[GSK_SL_DECORATION_CALLER_ACCESS].value);
   token = gsk_sl_preprocessor_get (stream);
   if (!gsk_sl_token_is (token, GSK_SL_TOKEN_IDENTIFIER))
     {
-      declaration->variable = gsk_sl_variable_new (type, NULL);
+      declaration->variable = gsk_sl_variable_new (pointer_type, NULL, 
decoration->values[GSK_SL_DECORATION_CONST].set);
+      gsk_sl_pointer_type_unref (pointer_type);
       return (GskSlNode *) declaration;
     }
 
-  declaration->variable = gsk_sl_variable_new (type, token->str);
+  declaration->variable = gsk_sl_variable_new (pointer_type, token->str, 
decoration->values[GSK_SL_DECORATION_CONST].set);
   gsk_sl_preprocessor_consume (stream, (GskSlNode *) declaration);
+  gsk_sl_pointer_type_unref (pointer_type);
 
   token = gsk_sl_preprocessor_get (stream);
   if (gsk_sl_token_is (token, GSK_SL_TOKEN_EQUAL))
@@ -385,11 +390,7 @@ gsk_sl_node_parse_statement (GskSlScope        *scope,
           }
         else
           {
-            GskSlPointerType *pointer_type;
-        
-            pointer_type = gsk_sl_pointer_type_new (type, TRUE, 
decoration.values[GSK_SL_DECORATION_CALLER_ACCESS].value);
-            node = gsk_sl_node_parse_declaration (scope, preproc, pointer_type);
-            gsk_sl_pointer_type_unref (pointer_type);
+            node = gsk_sl_node_parse_declaration (scope, preproc, &decoration, type);
           }
 
         gsk_sl_type_unref (type);
diff --git a/gsk/gskslprogram.c b/gsk/gskslprogram.c
index f351996..a0f405a 100644
--- a/gsk/gskslprogram.c
+++ b/gsk/gskslprogram.c
@@ -70,18 +70,22 @@ static gboolean
 gsk_sl_program_parse_variable (GskSlProgram      *program,
                                GskSlScope        *scope,
                                GskSlPreprocessor *preproc,
-                               GskSlPointerType  *type,
+                               GskSlDecorations  *decoration,
+                               GskSlType         *type,
                                const char        *name)
 {
   GskSlVariable *variable;
   const GskSlToken *token;
+  GskSlPointerType *pointer_type;
 
   token = gsk_sl_preprocessor_get (preproc);
   if (!gsk_sl_token_is (token, GSK_SL_TOKEN_SEMICOLON))
     return FALSE;
   gsk_sl_preprocessor_consume (preproc, NULL);
 
-  variable = gsk_sl_variable_new (type, name);
+  pointer_type = gsk_sl_pointer_type_new (type, FALSE, 
decoration->values[GSK_SL_DECORATION_CALLER_ACCESS].value);
+  variable = gsk_sl_variable_new (pointer_type, name, decoration->values[GSK_SL_DECORATION_CONST].set);
+  gsk_sl_pointer_type_unref (pointer_type);
       
   program->variables = g_slist_append (program->variables, variable);
   gsk_sl_scope_add_variable (scope, variable);
@@ -117,7 +121,7 @@ gsk_sl_program_parse_declaration (GskSlProgram      *program,
       if (success)
         {
           GskSlPointerType *ptype = gsk_sl_pointer_type_new (type, FALSE, 
decoration.values[GSK_SL_DECORATION_CALLER_ACCESS].value);
-          GskSlVariable *variable = gsk_sl_variable_new (ptype, NULL);
+          GskSlVariable *variable = gsk_sl_variable_new (ptype, NULL, 
decoration.values[GSK_SL_DECORATION_CONST].set);
           gsk_sl_pointer_type_unref (ptype);
           program->variables = g_slist_append (program->variables, variable);
           gsk_sl_preprocessor_consume (preproc, program);
@@ -152,11 +156,7 @@ gsk_sl_program_parse_declaration (GskSlProgram      *program,
     }
   else
     {
-      GskSlPointerType *pointer_type;
-
-      pointer_type = gsk_sl_pointer_type_new (type, FALSE, 
decoration.values[GSK_SL_DECORATION_CALLER_ACCESS].value);
-      success &= gsk_sl_program_parse_variable (program, scope, preproc, pointer_type, name);
-      gsk_sl_pointer_type_unref (pointer_type);
+      success &= gsk_sl_program_parse_variable (program, scope, preproc, &decoration, type, name);
     }
 
   return success;
diff --git a/gsk/gskslvariable.c b/gsk/gskslvariable.c
index faa3521..b84ccc0 100644
--- a/gsk/gskslvariable.c
+++ b/gsk/gskslvariable.c
@@ -28,11 +28,13 @@ struct _GskSlVariable {
 
   GskSlPointerType *type;
   char *name;
+  gboolean constant;
 };
 
 GskSlVariable *
 gsk_sl_variable_new (GskSlPointerType *type,
-                     const char       *name)
+                     const char       *name,
+                     gboolean          constant)
 {
   GskSlVariable *variable;
 
@@ -41,6 +43,7 @@ gsk_sl_variable_new (GskSlPointerType *type,
   variable->ref_count = 1;
   variable->type = gsk_sl_pointer_type_ref (type);
   variable->name = g_strdup (name);
+  variable->constant = constant;
 
   return variable;
 }
@@ -75,6 +78,8 @@ void
 gsk_sl_variable_print (const GskSlVariable *variable,
                        GString             *string)
 {
+  if (variable->constant)
+    g_string_append (string, "const ");
   gsk_sl_pointer_type_print (variable->type, string);
   if (variable->name)
     {
@@ -95,6 +100,12 @@ gsk_sl_variable_get_name (const GskSlVariable *variable)
   return variable->name;
 }
 
+gboolean
+gsk_sl_variable_is_constant (const GskSlVariable *variable)
+{
+  return variable->constant;
+}
+
 guint32
 gsk_sl_variable_write_spv (const GskSlVariable *variable,
                            GskSpvWriter        *writer)
diff --git a/gsk/gskslvariableprivate.h b/gsk/gskslvariableprivate.h
index bfb7be9..f909d22 100644
--- a/gsk/gskslvariableprivate.h
+++ b/gsk/gskslvariableprivate.h
@@ -26,7 +26,8 @@
 G_BEGIN_DECLS
 
 GskSlVariable *         gsk_sl_variable_new                     (GskSlPointerType       *type,
-                                                                 const char             *name);
+                                                                 const char             *name,
+                                                                 gboolean                constant);
 
 GskSlVariable *         gsk_sl_variable_ref                     (GskSlVariable          *variable);
 void                    gsk_sl_variable_unref                   (GskSlVariable          *variable);
@@ -36,6 +37,7 @@ void                    gsk_sl_variable_print                   (const GskSlVari
 
 GskSlPointerType *      gsk_sl_variable_get_type                (const GskSlVariable    *variable);
 const char *            gsk_sl_variable_get_name                (const GskSlVariable    *variable);
+gboolean                gsk_sl_variable_is_constant             (const GskSlVariable    *variable);
 
 guint32                 gsk_sl_variable_write_spv               (const GskSlVariable    *variable,
                                                                  GskSpvWriter           *writer);