Merge branch '7.8'

[mesa.git] / src / gallium / auxiliary / util / u_format.h

diff --git a/src/gallium/auxiliary/util/u_format.h b/src/gallium/auxiliary/util/u_format.h
index ec6b0777349410dd14e2b0219f9e4c920af52feb..c08fdcafcc8deca38f5013e5570924687f15c070 100644 (file)
--- a/src/gallium/auxiliary/util/u_format.h
+++ b/src/gallium/auxiliary/util/u_format.h
@@ -145,6 +145,15 @@ struct util_format_description
     */
    unsigned is_array:1;
 
+   /**
+    * Whether the pixel format can be described as a bitfield structure.
+    *
+    * In particular:
+    * - pixel depth must be 8, 16, or 32 bits;
+    * - all channels must be unsigned, signed, or void
+    */
+   unsigned is_bitmask:1;
+
    /**
     * Whether channels have mixed types (ignoring UTIL_FORMAT_TYPE_VOID).
     */
@@ -406,6 +415,16 @@ util_format_has_alpha(enum pipe_format format)
    }
 }
 
+/**
+ * Return the number of components stored.
+ * Formats with block size != 1x1 will always have 1 component (the block).
+ */
+static INLINE unsigned
+util_format_get_nr_components(enum pipe_format format)
+{
+   const struct util_format_description *desc = util_format_description(format);
+   return desc->nr_channels;
+}
 
 /*
  * Format access functions.