xserver mesa git update 3 May 2012

1 files changed, 13 insertions, 0 deletions

diff --git a/mesalib/src/gallium/auxiliary/util/u_format.h b/mesalib/src/gallium/auxiliary/util/u_format.h
index bd4e51d27..1718fb5e2 100644
--- a/mesalib/src/gallium/auxiliary/util/u_format.h
+++ b/mesalib/src/gallium/auxiliary/util/u_format.h
@@ -549,6 +549,19 @@ util_format_colormask(const struct util_format_description *desc)
 }
 
 
+/**
+ * Checks if color mask covers every channel for the specified format
+ *
+ * @param desc       a format description to check colormask with
+ * @param colormask  a bit mask for channels, matches format of PIPE_MASK_RGBA
+ */
+static INLINE boolean
+util_format_colormask_full(const struct util_format_description *desc, unsigned colormask)
+{
+   return (~colormask & util_format_colormask(desc)) == 0;
+}
+
+
 boolean
 util_format_is_float(enum pipe_format format);