ui/console: Add placeholder flag to message surface

The surfaces created with former qemu_create_message_surface
did not display the content from the guest and always contained
simple messages describing the reason.

A display backend may want to hide the window showing such a
surface. This change renames the function to
qemu_create_placeholder_surface, and adds "placeholder" flag; the
display can check the flag to decide to do anything special like
hiding the window.

Signed-off-by: Akihiko Odaki <akihiko.odaki@gmail.com>
Message-Id: <20210225101316.83940-1-akihiko.odaki@gmail.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 6 insertions, 5 deletions

diff --git a/ui/console.c b/ui/console.c
index c5d11bc701..32823faf41 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -1436,8 +1436,8 @@ DisplaySurface *qemu_create_displaysurface_pixman(pixman_image_t *image)
     return surface;
 }
 
-DisplaySurface *qemu_create_message_surface(int w, int h,
-                                            const char *msg)
+DisplaySurface *qemu_create_placeholder_surface(int w, int h,
+                                                const char *msg)
 {
     DisplaySurface *surface = qemu_create_displaysurface(w, h);
     pixman_color_t bg = color_table_rgb[0][QEMU_COLOR_BLACK];
@@ -1454,6 +1454,7 @@ DisplaySurface *qemu_create_message_surface(int w, int h,
                                  x+i, y, FONT_WIDTH, FONT_HEIGHT);
         qemu_pixman_image_unref(glyph);
     }
+    surface->flags |= QEMU_PLACEHOLDER_FLAG;
     return surface;
 }
 
@@ -1550,7 +1551,7 @@ void register_displaychangelistener(DisplayChangeListener *dcl)
             dcl->ops->dpy_gfx_switch(dcl, con->surface);
         } else {
             if (!dummy) {
-                dummy = qemu_create_message_surface(640, 480, nodev);
+                dummy = qemu_create_placeholder_surface(640, 480, nodev);
             }
             dcl->ops->dpy_gfx_switch(dcl, dummy);
         }
@@ -1998,7 +1999,7 @@ QemuConsole *graphic_console_init(DeviceState *dev, uint32_t head,
                                  &error_abort);
     }
 
-    surface = qemu_create_message_surface(width, height, noinit);
+    surface = qemu_create_placeholder_surface(width, height, noinit);
     dpy_gfx_replace_surface(s, surface);
     return s;
 }
@@ -2027,7 +2028,7 @@ void graphic_console_close(QemuConsole *con)
     if (con->gl) {
         dpy_gl_scanout_disable(con);
     }
-    surface = qemu_create_message_surface(width, height, unplugged);
+    surface = qemu_create_placeholder_surface(width, height, unplugged);
     dpy_gfx_replace_surface(con, surface);
 }