Mesa (master): gallium/util: added is_format_compressed()

[Brian Paul]

Module: Mesa
Branch: master
Commit: 0f0c0368faf38d73b0bbbb6e0a147bc94564d3a1
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=0f0c0368faf38d73b0bbbb6e0a147bc94564d3a1

Author: Brian Paul <brianp at vmware.com>
Date:   Tue May  4 17:04:27 2010 -0600

gallium/util: added is_format_compressed()

---

 src/gallium/auxiliary/util/u_format.h |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/src/gallium/auxiliary/util/u_format.h b/src/gallium/auxiliary/util/u_format.h
index 8ba0769..fd95bea 100644
--- a/src/gallium/auxiliary/util/u_format.h
+++ b/src/gallium/auxiliary/util/u_format.h
@@ -367,6 +367,26 @@ util_format_is_plain(enum pipe_format format)
 }
 
 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)
 {
    const struct util_format_description *desc = util_format_description(format);