[Qemu-devel] [PATCH 5/8] console: add ability to wrap a console.

[Dave Airlie <airlied@gmail.com>]

From: Dave Airlie <airlied@redhat.com>

In order to implement virtio-vga on top of virtio-gpu we need
to be able to wrap the first console virtio-gpu registers from
inside virtio-vga which initialises after virtio-gpu. With this
interface virtio-vga can store the virtio-gpu interfaces, and
call them from its own ones.

Signed-off-by: Dave Airlie <airlied@redhat.com>
---
 include/ui/console.h |  7 +++++++
 ui/console.c         | 13 +++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/include/ui/console.h b/include/ui/console.h
index f6e8957..2ad9238 100644
--- a/include/ui/console.h
+++ b/include/ui/console.h
@@ -285,6 +285,13 @@ QemuConsole *graphic_console_init(DeviceState *dev,
                                   const GraphicHwOps *ops,
                                   void *opaque);
 
+void graphic_console_wrap(QemuConsole *con,
+			  DeviceState *dev,
+			  const GraphicHwOps *ops,
+			  void *opaque,
+                          const GraphicHwOps **orig_ops,
+                          void **orig_opaque);
+
 void graphic_hw_update(QemuConsole *con);
 void graphic_hw_invalidate(QemuConsole *con);
 void graphic_hw_text_update(QemuConsole *con, console_ch_t *chardata);
diff --git a/ui/console.c b/ui/console.c
index def11ea..f2d6721 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -1619,6 +1619,19 @@ QemuConsole *graphic_console_init(DeviceState *dev,
     return s;
 }
 
+void graphic_console_wrap(QemuConsole *con,
+			  DeviceState *dev,
+			  const GraphicHwOps *hw_ops,
+			  void *opaque,
+                          const GraphicHwOps **orig_ops,
+                          void **orig_opaque)
+{
+    *orig_opaque = con->hw;
+    *orig_ops = con->hw_ops;
+    con->hw_ops = hw_ops;
+    con->hw = opaque;
+}
+
 QemuConsole *qemu_console_lookup_by_index(unsigned int index)
 {
     if (index >= MAX_CONSOLES) {
-- 
1.8.3.1