gallium/util: added is_format_compressed()

diff --git a/src/gallium/auxiliary/util/u_format.h b/src/gallium/auxiliary/util/u_format.h
index 8ba076949b6eb2477c71469555f9423224fbf9e4..fd95bea1a7bf897f53cfe5a3c9c1adf8f844a414 100644 (file)
--- a/src/gallium/auxiliary/util/u_format.h
+++ b/src/gallium/auxiliary/util/u_format.h
@@ -366,6 +366,26 @@ util_format_is_plain(enum pipe_format format)
    return desc->layout == UTIL_FORMAT_LAYOUT_PLAIN ? TRUE : FALSE;
 }
 
+static INLINE boolean 
+util_format_is_compressed(enum pipe_format format)
+{
+   const struct util_format_description *desc = util_format_description(format);
+
+   assert(desc);
+   if (!desc) {
+      return FALSE;
+   }
+
+   switch (desc->layout) {
+   case UTIL_FORMAT_LAYOUT_S3TC:
+   case UTIL_FORMAT_LAYOUT_RGTC:
+      /* XXX add other formats in the future */
+      return TRUE;
+   default:
+      return FALSE;
+   }
+}
+
 static INLINE boolean 
 util_format_is_s3tc(enum pipe_format format)
 {