From 2a0f0be8c05edda713f178667dab1a1684848360 Mon Sep 17 00:00:00 2001
From: Christian Hergert <chergert@redhat.com>
Date: Sat, 11 Feb 2023 09:19:29 -0800
Subject: [PATCH] lib: decode pixman_format_t into cairo_format_t

---
 lib/mks-paintable.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/lib/mks-paintable.c b/lib/mks-paintable.c
index 42a1d68..45526e6 100644
--- a/lib/mks-paintable.c
+++ b/lib/mks-paintable.c
@@ -199,10 +199,21 @@ mks_paintable_listener_update (MksPaintable          *self,
                                GVariant              *bytes,
                                MksQemuListener       *listener)
 {
+  cairo_format_t format;
+
   g_assert (MKS_IS_PAINTABLE (self));
   g_assert (G_IS_DBUS_METHOD_INVOCATION (invocation));
   g_assert (MKS_QEMU_IS_LISTENER (listener));
 
+  if (!(format = _pixman_format_to_cairo_format (pixman_format)))
+    {
+      g_dbus_method_invocation_return_error_literal (invocation,
+                                                     G_IO_ERROR,
+                                                     G_IO_ERROR_NOT_SUPPORTED,
+                                                     "Pixman format not supported");
+      return TRUE;
+    }
+
   gdk_paintable_invalidate_contents (GDK_PAINTABLE (self));
 
   g_print ("Update {%d,%d,%d,%d}\n", x, y, width, height);
@@ -221,12 +232,22 @@ mks_paintable_listener_scanout (MksPaintable          *self,
                                 GVariant              *bytes,
                                 MksQemuListener       *listener)
 {
+  cairo_format_t format;
   gboolean size_changed;
 
   g_assert (MKS_IS_PAINTABLE (self));
   g_assert (G_IS_DBUS_METHOD_INVOCATION (invocation));
   g_assert (MKS_QEMU_IS_LISTENER (listener));
 
+  if (!(format = _pixman_format_to_cairo_format (pixman_format)))
+    {
+      g_dbus_method_invocation_return_error_literal (invocation,
+                                                     G_IO_ERROR,
+                                                     G_IO_ERROR_NOT_SUPPORTED,
+                                                     "Pixman format not supported");
+      return TRUE;
+    }
+
   size_changed = width != self->width || height != self->height;
 
   g_print ("Scannout!\n");