From a78f295f7ca0a93fdaeda559668fda013c2a03b0 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Thu, 7 Aug 2008 10:26:35 -0600
Subject: mesa: glsl: finish up support for precision qualifiers

---
 src/mesa/shader/slang/slang_compile.c          | 21 +++++++++++++++++----
 src/mesa/shader/slang/slang_compile_variable.h | 10 ++++++++++
 2 files changed, 27 insertions(+), 4 deletions(-)

(limited to 'src/mesa/shader')

diff --git a/src/mesa/shader/slang/slang_compile.c b/src/mesa/shader/slang/slang_compile.c
index 2a1af39ee0..64c0dad611 100644
--- a/src/mesa/shader/slang/slang_compile.c
+++ b/src/mesa/shader/slang/slang_compile.c
@@ -707,20 +707,33 @@ parse_fully_specified_type(slang_parse_ctx * C, slang_output_ctx * O,
    precision = *C->I++;
    if (!parse_type_specifier(C, O, &type->specifier))
       return 0;
+
    switch (precision) {
    case PRECISION_DEFAULT:
-      /* TODO: Grab the default precision for the given type specifier.
-       */
+      assert(type->specifier.type < TYPE_SPECIFIER_COUNT);
+      if (type->specifier.type < TYPE_SPECIFIER_COUNT)
+         type->precision = O->default_precision[type->specifier.type];
       break;
    case PRECISION_LOW:
+      type->precision = SLANG_PREC_LOW;
+      break;
    case PRECISION_MEDIUM:
+      type->precision = SLANG_PREC_MEDIUM;
+      break;
    case PRECISION_HIGH:
-      /* TODO: Translate to mesa representation.
-       */
+      type->precision = SLANG_PREC_HIGH;
       break;
    default:
       return 0;
    }
+
+#if !FEATURE_es2_glsl
+   if (precision != PRECISION_DEFAULT) {
+      slang_info_log_error(C->L, "precision qualifiers not allowed");
+      return 0;
+   }
+#endif
+
    return 1;
 }
 
diff --git a/src/mesa/shader/slang/slang_compile_variable.h b/src/mesa/shader/slang/slang_compile_variable.h
index 9b0f85859a..d81a3d2869 100644
--- a/src/mesa/shader/slang/slang_compile_variable.h
+++ b/src/mesa/shader/slang/slang_compile_variable.h
@@ -51,10 +51,20 @@ slang_type_specifier_type_to_string(slang_type_specifier_type);
 
 
 
+typedef enum slang_type_precision_
+{
+   SLANG_PREC_DEFAULT,
+   SLANG_PREC_LOW,
+   SLANG_PREC_MEDIUM,
+   SLANG_PREC_HIGH
+} slang_type_precision;
+
+
 typedef struct slang_fully_specified_type_
 {
    slang_type_qualifier qualifier;
    slang_type_specifier specifier;
+   slang_type_precision precision;
 } slang_fully_specified_type;
 
 extern int
-- 
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