From 252127c379404f0c0c23a5f0e2e4175816f7e903 Mon Sep 17 00:00:00 2001
From: Ian Romanick <ian.d.romanick@intel.com>
Date: Thu, 25 Mar 2010 11:42:45 -0700
Subject: [PATCH] Add queries to get the glsl_type of a row or column of a
 matrix

---
 glsl_types.h | 40 ++++++++++++++++++++++++++++++++++------
 1 file changed, 34 insertions(+), 6 deletions(-)

diff --git a/glsl_types.h b/glsl_types.h
index 04a9ccf..e1768d5 100644
--- a/glsl_types.h
+++ b/glsl_types.h
@@ -39,6 +39,12 @@
 #define GLSL_TYPE_VOID          8
 #define GLSL_TYPE_ERROR         9
 
+extern const struct glsl_type *const glsl_error_type;
+extern const struct glsl_type *const glsl_int_type;
+extern const struct glsl_type *const glsl_uint_type;
+extern const struct glsl_type *const glsl_float_type;
+extern const struct glsl_type *const glsl_bool_type;
+
 #define is_numeric_base_type(b) \
    (((b) >= GLSL_TYPE_UINT) && ((b) <= GLSL_TYPE_FLOAT))
 
@@ -223,6 +229,34 @@ struct glsl_type {
       return base_type == GLSL_TYPE_ERROR;
    }
 
+   /**
+    * Query the full type of a matrix row
+    *
+    * \return
+    * If the type is not a matrix, \c glsl_error_type is returned.  Otherwise
+    * a type matching the rows of the matrix is returned.
+    */
+   const glsl_type *row_type() const
+   {
+      return is_matrix()
+	 ? get_instance(base_type, matrix_rows, 1)
+	 : glsl_error_type;
+   }
+
+   /**
+    * Query the full type of a matrix column
+    *
+    * \return
+    * If the type is not a matrix, \c glsl_error_type is returned.  Otherwise
+    * a type matching the columns of the matrix is returned.
+    */
+   const glsl_type *column_type() const
+   {
+      return is_matrix()
+	 ? get_instance(base_type, vector_elements, 1)
+	 : glsl_error_type;
+   }
+
 private:
    /**
     * \name Pointers to various type singletons
@@ -254,12 +288,6 @@ extern "C" {
 extern void
 _mesa_glsl_initialize_types(struct _mesa_glsl_parse_state *state);
 
-extern const struct glsl_type *const glsl_error_type;
-extern const struct glsl_type *const glsl_int_type;
-extern const struct glsl_type *const glsl_uint_type;
-extern const struct glsl_type *const glsl_float_type;
-extern const struct glsl_type *const glsl_bool_type;
-
 #ifdef __cplusplus
 }
 #endif
-- 
2.7.4