tgsi/ureg: Add a function to return the number of outputs

We already hold the variable, just weren't providing access
to it.

Signed-off-by: Zack Rusin <zackr@vmware.com>
Reviewed-by: José Fonseca <jfonseca@vmware.com>

src/gallium/auxiliary/tgsi/tgsi_ureg.c

@@ -1767,6 +1767,15 @@ no_ureg:
 }
 
 
+const unsigned
+ureg_get_nr_outputs( const struct ureg_program *ureg )
+{
+   if (!ureg)
+      return 0;
+   return ureg->nr_outputs;
+}
+
+
 void ureg_destroy( struct ureg_program *ureg )
 {
    unsigned i;

src/gallium/auxiliary/tgsi/tgsi_ureg.h

@@ -111,6 +111,12 @@ const struct tgsi_token *
 ureg_get_tokens( struct ureg_program *ureg,
                  unsigned *nr_tokens );
 
+/*
+ * Returns the number of currently declared outputs.
+ */
+const unsigned
+ureg_get_nr_outputs( const struct ureg_program *ureg );
+
 
 /* Free the tokens created by ureg_get_tokens() */
 void ureg_free_tokens( const struct tgsi_token *tokens );