unpack: support unpacking MESA_FORMAT_ARGB2101010

Note: This is a candidate for the stable branches.

Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
(cherry picked from commit 2ace406b1fa502219d353e5d259d1c4bcd5633a5)

diff --git a/src/mesa/main/format_unpack.c b/src/mesa/main/format_unpack.c
index bd21852..4d1a434 100644 (file)
--- a/src/mesa/main/format_unpack.c
+++ b/src/mesa/main/format_unpack.c
@@ -2623,6 +2623,20 @@ unpack_int_rgba_ABGR2101010_UINT(const GLuint *src, GLuint dst[][4], GLuint n)
    }
 }
 
+static void
+unpack_int_rgba_ARGB2101010(const GLuint *src, GLuint dst[][4], GLuint n)
+{
+   unsigned int i;
+
+   for (i = 0; i < n; i++) {
+      GLuint tmp = src[i];
+      dst[i][0] = (tmp >> 20) & 0x3ff;
+      dst[i][1] = (tmp >> 10) & 0x3ff;
+      dst[i][2] = (tmp >> 0) & 0x3ff;
+      dst[i][3] = (tmp >> 30) & 0x3;
+   }
+}
+
 void
 _mesa_unpack_uint_rgba_row(gl_format format, GLuint n,
                            const void *src, GLuint dst[][4])
@@ -2798,6 +2812,10 @@ _mesa_unpack_uint_rgba_row(gl_format format, GLuint n,
       unpack_int_rgba_ABGR2101010_UINT(src, dst, n);
       break;
 
+   case MESA_FORMAT_ARGB2101010:
+      unpack_int_rgba_ARGB2101010(src, dst, n);
+      break;
+
    default:
       _mesa_problem(NULL, "%s: bad format %s", __FUNCTION__,
                     _mesa_get_format_name(format));