[mutter] wayland/shm: Add support for ABGR8888 and XBGR8888 formats

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

commit 47375897a5be9694590622b145485324ed0b0554
Author: Jonas Ådahl <jadahl gmail com>
Date:   Tue Mar 29 19:03:08 2022 +0200

    wayland/shm: Add support for ABGR8888 and XBGR8888 formats
    
    This avoids shuffling bits for clients drawing in these formats.
    
    Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2200
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2352>

 src/wayland/meta-wayland-buffer.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
---
diff --git a/src/wayland/meta-wayland-buffer.c b/src/wayland/meta-wayland-buffer.c
index 8b354e7aa6..e6d4df9794 100644
--- a/src/wayland/meta-wayland-buffer.c
+++ b/src/wayland/meta-wayland-buffer.c
@@ -207,6 +207,12 @@ shm_format_to_cogl_pixel_format (enum wl_shm_format     shm_format,
       format = COGL_PIXEL_FORMAT_ARGB_8888;
       components = COGL_TEXTURE_COMPONENTS_RGB;
       break;
+    case WL_SHM_FORMAT_XBGR8888:
+      components = COGL_TEXTURE_COMPONENTS_RGB;
+      G_GNUC_FALLTHROUGH;
+    case WL_SHM_FORMAT_ABGR8888:
+      format = COGL_PIXEL_FORMAT_ABGR_8888_PRE;
+      break;
 #elif G_BYTE_ORDER == G_LITTLE_ENDIAN
     case WL_SHM_FORMAT_RGB565:
       format = COGL_PIXEL_FORMAT_RGB_565;
@@ -219,6 +225,12 @@ shm_format_to_cogl_pixel_format (enum wl_shm_format     shm_format,
       format = COGL_PIXEL_FORMAT_BGRA_8888;
       components = COGL_TEXTURE_COMPONENTS_RGB;
       break;
+    case WL_SHM_FORMAT_XBGR8888:
+      components = COGL_TEXTURE_COMPONENTS_RGB;
+      G_GNUC_FALLTHROUGH;
+    case WL_SHM_FORMAT_ABGR8888:
+      format = COGL_PIXEL_FORMAT_RGBA_8888_PRE;
+      break;
     case WL_SHM_FORMAT_XRGB2101010:
       components = COGL_TEXTURE_COMPONENTS_RGB;
       G_GNUC_FALLTHROUGH;
@@ -813,6 +825,8 @@ meta_wayland_init_shm (MetaWaylandCompositor *compositor)
     clutter_backend_get_cogl_context (clutter_backend);
 
   static const enum wl_shm_format shm_formats[] = {
+    WL_SHM_FORMAT_ABGR8888,
+    WL_SHM_FORMAT_XBGR8888,
 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
     WL_SHM_FORMAT_RGB565,
     WL_SHM_FORMAT_ARGB2101010,