[Qemu-devel] [PATCH] console: nicer initial screen

[Qemu-devel] [PATCH] console: nicer initial screen

[Gerd Hoffmann]

Now that we have a function to create a fancy DisplaySurface with a
message for the user, to handle non-existing graphics hardware, we
can make it more generic and use it for other things too.

This patch adds a text line to the in initial DisplaySurface, notifying
the user that the display isn't initialized yet by the guest.

You can see this in action when starting qemu with '-S'.  Also when
booting ovmf in qemu (which needs a few moments to initialize itself
before it initializes the vga).

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 ui/console.c |   19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/ui/console.c b/ui/console.c
index b30853f..05f0b4a 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -1300,19 +1300,18 @@ DisplaySurface *qemu_create_displaysurface_from(int width, int height, int bpp,
     return surface;
 }
 
-static DisplaySurface *qemu_create_dummy_surface(void)
+static DisplaySurface *qemu_create_message_surface(int w, int h,
+                                                   const char *msg)
 {
-    static const char msg[] =
-        "This VM has no graphic display device.";
-    DisplaySurface *surface = qemu_create_displaysurface(640, 480);
+    DisplaySurface *surface = qemu_create_displaysurface(w, h);
     pixman_color_t bg = color_table_rgb[0][COLOR_BLACK];
     pixman_color_t fg = color_table_rgb[0][COLOR_WHITE];
     pixman_image_t *glyph;
     int len, x, y, i;
 
     len = strlen(msg);
-    x = (640/FONT_WIDTH  - len) / 2;
-    y = (480/FONT_HEIGHT - 1)   / 2;
+    x = (w / FONT_WIDTH  - len) / 2;
+    y = (h / FONT_HEIGHT - 1)   / 2;
     for (i = 0; i < len; i++) {
         glyph = qemu_pixman_glyph_from_vgafont(FONT_HEIGHT, vgafont16, msg[i]);
         qemu_pixman_glyph_render(glyph, surface->image, &fg, &bg,
@@ -1334,6 +1333,8 @@ void qemu_free_displaysurface(DisplaySurface *surface)
 
 void register_displaychangelistener(DisplayChangeListener *dcl)
 {
+    static const char nodev[] =
+        "This VM has no graphic display device.";
     static DisplaySurface *dummy;
     QemuConsole *con;
 
@@ -1352,7 +1353,7 @@ void register_displaychangelistener(DisplayChangeListener *dcl)
             dcl->ops->dpy_gfx_switch(dcl, con->surface);
         } else {
             if (!dummy) {
-                dummy = qemu_create_dummy_surface();
+                dummy = qemu_create_message_surface(640, 480, nodev);
             }
             dcl->ops->dpy_gfx_switch(dcl, dummy);
         }
@@ -1600,6 +1601,8 @@ QemuConsole *graphic_console_init(DeviceState *dev,
                                   const GraphicHwOps *hw_ops,
                                   void *opaque)
 {
+    static const char noinit[] =
+        "Guest has not initialized the display (yet).";
     Error *local_err = NULL;
     int width = 640;
     int height = 480;
@@ -1616,7 +1619,7 @@ QemuConsole *graphic_console_init(DeviceState *dev,
                                  "device", &local_err);
     }
 
-    s->surface = qemu_create_displaysurface(width, height);
+    s->surface = qemu_create_message_surface(width, height, noinit);
     return s;
 }
 
-- 
1.7.9.7

Re: [Qemu-devel] [PATCH] console: nicer initial screen

[Anthony Liguori]

Gerd Hoffmann <kraxel@redhat.com> writes:

> Now that we have a function to create a fancy DisplaySurface with a
> message for the user, to handle non-existing graphics hardware, we
> can make it more generic and use it for other things too.
>
> This patch adds a text line to the in initial DisplaySurface, notifying
> the user that the display isn't initialized yet by the guest.
>
> You can see this in action when starting qemu with '-S'.  Also when
> booting ovmf in qemu (which needs a few moments to initialize itself
> before it initializes the vga).
>
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

Dunno if I said this in the previous posting, but what about just
blitting an image?   This text isn't internationalized.

Regards,

Anthony Liguori

> ---
>  ui/console.c |   19 +++++++++++--------
>  1 file changed, 11 insertions(+), 8 deletions(-)
>
> diff --git a/ui/console.c b/ui/console.c
> index b30853f..05f0b4a 100644
> --- a/ui/console.c
> +++ b/ui/console.c
> @@ -1300,19 +1300,18 @@ DisplaySurface *qemu_create_displaysurface_from(int width, int height, int bpp,
>      return surface;
>  }
>  
> -static DisplaySurface *qemu_create_dummy_surface(void)
> +static DisplaySurface *qemu_create_message_surface(int w, int h,
> +                                                   const char *msg)
>  {
> -    static const char msg[] =
> -        "This VM has no graphic display device.";
> -    DisplaySurface *surface = qemu_create_displaysurface(640, 480);
> +    DisplaySurface *surface = qemu_create_displaysurface(w, h);
>      pixman_color_t bg = color_table_rgb[0][COLOR_BLACK];
>      pixman_color_t fg = color_table_rgb[0][COLOR_WHITE];
>      pixman_image_t *glyph;
>      int len, x, y, i;
>  
>      len = strlen(msg);
> -    x = (640/FONT_WIDTH  - len) / 2;
> -    y = (480/FONT_HEIGHT - 1)   / 2;
> +    x = (w / FONT_WIDTH  - len) / 2;
> +    y = (h / FONT_HEIGHT - 1)   / 2;
>      for (i = 0; i < len; i++) {
>          glyph = qemu_pixman_glyph_from_vgafont(FONT_HEIGHT, vgafont16, msg[i]);
>          qemu_pixman_glyph_render(glyph, surface->image, &fg, &bg,
> @@ -1334,6 +1333,8 @@ void qemu_free_displaysurface(DisplaySurface *surface)
>  
>  void register_displaychangelistener(DisplayChangeListener *dcl)
>  {
> +    static const char nodev[] =
> +        "This VM has no graphic display device.";
>      static DisplaySurface *dummy;
>      QemuConsole *con;
>  
> @@ -1352,7 +1353,7 @@ void register_displaychangelistener(DisplayChangeListener *dcl)
>              dcl->ops->dpy_gfx_switch(dcl, con->surface);
>          } else {
>              if (!dummy) {
> -                dummy = qemu_create_dummy_surface();
> +                dummy = qemu_create_message_surface(640, 480, nodev);
>              }
>              dcl->ops->dpy_gfx_switch(dcl, dummy);
>          }
> @@ -1600,6 +1601,8 @@ QemuConsole *graphic_console_init(DeviceState *dev,
>                                    const GraphicHwOps *hw_ops,
>                                    void *opaque)
>  {
> +    static const char noinit[] =
> +        "Guest has not initialized the display (yet).";
>      Error *local_err = NULL;
>      int width = 640;
>      int height = 480;
> @@ -1616,7 +1619,7 @@ QemuConsole *graphic_console_init(DeviceState *dev,
>                                   "device", &local_err);
>      }
>  
> -    s->surface = qemu_create_displaysurface(width, height);
> +    s->surface = qemu_create_message_surface(width, height, noinit);
>      return s;
>  }
>  
> -- 
> 1.7.9.7

Re: [Qemu-devel] [PATCH] console: nicer initial screen

[Gerd Hoffmann]

  Hi,

>> This patch adds a text line to the in initial DisplaySurface, notifying
>> the user that the display isn't initialized yet by the guest.

> Dunno if I said this in the previous posting, but what about just
> blitting an image?

Why?  And which one?

> This text isn't internationalized.

We can change that without too much fuss I think, now that we have the
gettext infrastructure anyway for the gtk ui ...

cheers,
  Gerd

[Qemu-devel] [PATCH] console: nicer initial screen

[Gerd Hoffmann]

Now that we have a function to create a fancy DisplaySurface with a
message for the user, to handle non-existing graphics hardware, we
can make it more generic and use it for other things too.

This patch adds a text line to the in initial DisplaySurface, notifying
the user that the display isn't initialized yet by the guest.

You can see this in action when starting qemu with '-S'.  Also when
booting ovmf in qemu (which needs a few moments to initialize itself
before it initializes the vga).

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 ui/console.c | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/ui/console.c b/ui/console.c
index c92df8b..c6087d8 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -1271,19 +1271,18 @@ DisplaySurface *qemu_create_displaysurface_from(int width, int height, int bpp,
     return surface;
 }
 
-static DisplaySurface *qemu_create_dummy_surface(void)
+static DisplaySurface *qemu_create_message_surface(int w, int h,
+                                                   const char *msg)
 {
-    static const char msg[] =
-        "This VM has no graphic display device.";
-    DisplaySurface *surface = qemu_create_displaysurface(640, 480);
+    DisplaySurface *surface = qemu_create_displaysurface(w, h);
     pixman_color_t bg = color_table_rgb[0][COLOR_BLACK];
     pixman_color_t fg = color_table_rgb[0][COLOR_WHITE];
     pixman_image_t *glyph;
     int len, x, y, i;
 
     len = strlen(msg);
-    x = (640/FONT_WIDTH  - len) / 2;
-    y = (480/FONT_HEIGHT - 1)   / 2;
+    x = (w / FONT_WIDTH  - len) / 2;
+    y = (h / FONT_HEIGHT - 1)   / 2;
     for (i = 0; i < len; i++) {
         glyph = qemu_pixman_glyph_from_vgafont(FONT_HEIGHT, vgafont16, msg[i]);
         qemu_pixman_glyph_render(glyph, surface->image, &fg, &bg,
@@ -1305,6 +1304,8 @@ void qemu_free_displaysurface(DisplaySurface *surface)
 
 void register_displaychangelistener(DisplayChangeListener *dcl)
 {
+    static const char nodev[] =
+        "This VM has no graphic display device.";
     static DisplaySurface *dummy;
     QemuConsole *con;
 
@@ -1323,7 +1324,7 @@ void register_displaychangelistener(DisplayChangeListener *dcl)
             dcl->ops->dpy_gfx_switch(dcl, con->surface);
         } else {
             if (!dummy) {
-                dummy = qemu_create_dummy_surface();
+                dummy = qemu_create_message_surface(640, 480, nodev);
             }
             dcl->ops->dpy_gfx_switch(dcl, dummy);
         }
@@ -1590,6 +1591,8 @@ QemuConsole *graphic_console_init(DeviceState *dev, uint32_t head,
                                   const GraphicHwOps *hw_ops,
                                   void *opaque)
 {
+    static const char noinit[] =
+        "Guest has not initialized the display (yet).";
     int width = 640;
     int height = 480;
     QemuConsole *s;
@@ -1605,7 +1608,7 @@ QemuConsole *graphic_console_init(DeviceState *dev, uint32_t head,
                                  &error_abort);
     }
 
-    s->surface = qemu_create_displaysurface(width, height);
+    s->surface = qemu_create_message_surface(width, height, noinit);
     return s;
 }
 
-- 
1.8.3.1