util: Added util_format_is_array.

[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 b9ae7c190307288b26813e3a6f0d82850a0b9733..e35e164b43dd8f416af513c9f4147c136d853dbe 100644 (file)
--- a/src/gallium/auxiliary/util/u_format.h
+++ b/src/gallium/auxiliary/util/u_format.h
@@ -54,7 +54,7 @@ enum util_format_layout {
    /**
     * Formats with sub-sampled channels.
     *
-    * This is for formats like YV12 where there is less than one sample per
+    * This is for formats like YVYU where there is less than one sample per
     * pixel.
     */
    UTIL_FORMAT_LAYOUT_SUBSAMPLED = 3,
@@ -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);
 
@@ -577,6 +590,13 @@ util_format_is_pure_sint(enum pipe_format format);
 boolean
 util_format_is_pure_uint(enum pipe_format format);
 
+/**
+ * Whether the format is a simple array format where all channels
+ * are of the same type and can be loaded from memory as a vector
+ */
+boolean
+util_format_is_array(const struct util_format_description *desc);
+
 /**
  * Check if the src format can be blitted to the destination format with
  * a simple memcpy.  For example, blitting from RGBA to RGBx is OK, but not