[mutter] shaped-texture: never slice shape mask texture

[Robert Bragg <rbragg src gnome org>]

commit a22859a64a60b38346ce7faabad6a9a48d7a8d9f
Author: Robert Bragg <robert linux intel com>
Date:   Tue Apr 24 17:48:19 2012 -0700

    shaped-texture: never slice shape mask texture
    
    Since Cogl doesn't support multi-texturing with sliced textures and the
    shape texture is combined with the texture-from-pixmap texture we need
    to make sure we never construct a sliced mask texture. This patch simply
    passes the COGL_TEXTURE_NO_SLICE flag to cogl_texture_from_data when
    creating the shape mask texture.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=674731

 src/compositor/meta-shaped-texture.c |   17 +++++++++++------
 1 files changed, 11 insertions(+), 6 deletions(-)
---
diff --git a/src/compositor/meta-shaped-texture.c b/src/compositor/meta-shaped-texture.c
index 07bd93c..182d23b 100644
--- a/src/compositor/meta-shaped-texture.c
+++ b/src/compositor/meta-shaped-texture.c
@@ -313,12 +313,17 @@ meta_shaped_texture_ensure_mask (MetaShapedTexture *stex)
         }
       else
 #endif /* GL_TEXTURE_RECTANGLE_ARB */
-        priv->mask_texture = cogl_texture_new_from_data (tex_width, tex_height,
-                                                         COGL_TEXTURE_NONE,
-                                                         COGL_PIXEL_FORMAT_A_8,
-                                                         COGL_PIXEL_FORMAT_ANY,
-                                                         stride,
-                                                         mask_data);
+        {
+	  /* Note: we don't allow slicing for this texture because we
+           * need to use it with multi-texturing which doesn't support
+           * sliced textures */
+          priv->mask_texture = cogl_texture_new_from_data (tex_width, tex_height,
+                                                           COGL_TEXTURE_NO_SLICING,
+                                                           COGL_PIXEL_FORMAT_A_8,
+                                                           COGL_PIXEL_FORMAT_ANY,
+                                                           stride,
+                                                           mask_data);
+        }
 
       g_free (mask_data);