[mutter] shaped-texture: Swap 90 and 270 degree transforms in pipeline matrix

[Marge Bot <marge-bot src gnome org>]

commit d644a40cf528e9c521988d861bdcb94c0b89ca5f
Author: Robert Mader <robert mader posteo de>
Date:   Tue Jun 14 19:01:27 2022 +0200

    shaped-texture: Swap 90 and 270 degree transforms in pipeline matrix
    
    With `META_MONITOR_TRANSFORM` values matching their `WL_OUTPUT_TRANSFORM`
    counterparts, the definition from the Wayland spec applies: the
    `META_MONITOR_TRANSFORM` value tells us how the output was rotated
    and that the buffer was drawn by the client to compensate for that.
    
    The matrix describes the transformation from surface- to buffer-
    coordinates, so the operation we need here is the same one that
    the client applied (not from buffer- to surface-coordinates, i.e.
    the inverse).
    
    While on it fix `FLIPPED_90` and `FLIPPED_270` to use the correct
    axes: flip on the x-axis, rotation on the z-axis.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2459>

 src/compositor/meta-shaped-texture.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/src/compositor/meta-shaped-texture.c b/src/compositor/meta-shaped-texture.c
index 34fec6852a..d7cba799ea 100644
--- a/src/compositor/meta-shaped-texture.c
+++ b/src/compositor/meta-shaped-texture.c
@@ -341,7 +341,7 @@ get_base_pipeline (MetaShapedTexture *stex,
       switch (stex->transform)
         {
         case META_MONITOR_TRANSFORM_90:
-          graphene_euler_init_with_order (&euler, 0.0, 0.0, 90.0,
+          graphene_euler_init_with_order (&euler, 0.0, 0.0, 270.0,
                                           GRAPHENE_EULER_ORDER_SYXZ);
           break;
         case META_MONITOR_TRANSFORM_180:
@@ -349,7 +349,7 @@ get_base_pipeline (MetaShapedTexture *stex,
                                           GRAPHENE_EULER_ORDER_SYXZ);
           break;
         case META_MONITOR_TRANSFORM_270:
-          graphene_euler_init_with_order (&euler, 0.0, 0.0, 270.0,
+          graphene_euler_init_with_order (&euler, 0.0, 0.0, 90.0,
                                           GRAPHENE_EULER_ORDER_SYXZ);
           break;
         case META_MONITOR_TRANSFORM_FLIPPED:
@@ -357,7 +357,7 @@ get_base_pipeline (MetaShapedTexture *stex,
                                           GRAPHENE_EULER_ORDER_SYXZ);
           break;
         case META_MONITOR_TRANSFORM_FLIPPED_90:
-          graphene_euler_init_with_order (&euler, 180.0, 0.0, 90.0,
+          graphene_euler_init_with_order (&euler, 0.0, 180.0, 90.0,
                                           GRAPHENE_EULER_ORDER_SYXZ);
           break;
         case META_MONITOR_TRANSFORM_FLIPPED_180:
@@ -365,7 +365,7 @@ get_base_pipeline (MetaShapedTexture *stex,
                                           GRAPHENE_EULER_ORDER_SYXZ);
           break;
         case META_MONITOR_TRANSFORM_FLIPPED_270:
-          graphene_euler_init_with_order (&euler, 180.0, 0.0, 270.0,
+          graphene_euler_init_with_order (&euler, 0.0, 180.0, 270.0,
                                           GRAPHENE_EULER_ORDER_SYXZ);
           break;
         case META_MONITOR_TRANSFORM_NORMAL: