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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>
This commit is contained in:
Akihiko Odaki 2021-02-25 19:13:14 +09:00 committed by Gerd Hoffmann
parent 4313739a57
commit b5a087b071
5 changed files with 20 additions and 13 deletions
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4
hw/display/vhost-user-gpu.c
View File

@ -194,8 +194,8 @@ vhost_user_gpu_handle_display(VhostUserGPU *g, VhostUserGpuMsg *msg)
con = s->con;
if (m->scanout_id == 0 && m->width == 0) {
s->ds = qemu_create_message_surface(640, 480,
"Guest disabled display.");
s->ds = qemu_create_placeholder_surface(640, 480,
"Guest disabled display.");
dpy_gfx_replace_surface(con, s->ds);
} else {
s->ds = qemu_create_displaysurface(m->width, m->height);

6
hw/display/virtio-gpu.c
View File

@ -338,9 +338,9 @@ static void virtio_gpu_disable_scanout(VirtIOGPU *g, int scanout_id)
if (scanout_id == 0) {
/* primary head */
ds = qemu_create_message_surface(scanout->width ?: 640,
scanout->height ?: 480,
"Guest disabled display.");
ds = qemu_create_placeholder_surface(scanout->width ?: 640,
scanout->height ?: 480,
"Guest disabled display.");
}
dpy_gfx_replace_surface(scanout->con, ds);
scanout->resource_id = 0;

10
include/ui/console.h
View File

@ -106,6 +106,7 @@ struct QemuConsoleClass {
};
#define QEMU_ALLOCATED_FLAG 0x01
#define QEMU_PLACEHOLDER_FLAG 0x02
typedef struct DisplaySurface {
pixman_format_code_t format;
@ -259,8 +260,8 @@ DisplaySurface *qemu_create_displaysurface_from(int width, int height,
pixman_format_code_t format,
int linesize, uint8_t *data);
DisplaySurface *qemu_create_displaysurface_pixman(pixman_image_t *image);
DisplaySurface *qemu_create_message_surface(int w, int h,
const char *msg);
DisplaySurface *qemu_create_placeholder_surface(int w, int h,
const char *msg);
PixelFormat qemu_default_pixelformat(int bpp);
DisplaySurface *qemu_create_displaysurface(int width, int height);
@ -281,6 +282,11 @@ static inline int is_buffer_shared(DisplaySurface *surface)
return !(surface->flags & QEMU_ALLOCATED_FLAG);
}
static inline int is_placeholder(DisplaySurface *surface)
{
return surface->flags & QEMU_PLACEHOLDER_FLAG;
}
void register_displaychangelistener(DisplayChangeListener *dcl);
void update_displaychangelistener(DisplayChangeListener *dcl,
uint64_t interval);

11
ui/console.c
View File

@ -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);
}

2
ui/vnc.c
View File

@ -799,7 +799,7 @@ static void vnc_dpy_switch(DisplayChangeListener *dcl,
if (surface == NULL) {
if (placeholder == NULL) {
placeholder = qemu_create_message_surface(640, 480, placeholder_msg);
placeholder = qemu_create_placeholder_surface(640, 480, placeholder_msg);
}
surface = placeholder;
}