ui/virtio-gpu: add and use qemu_create_displaysurface_pixman
Add a the new qemu_create_displaysurface_pixman function, to create
a DisplaySurface backed by an existing pixman image. In that case
there is no need to create a new pixman image pointing to the same
backing storage. We can just use the existing image directly.
This does not only simplify things a bit, but most importantly it
gets the reference counting right, so the backing storage for the
pixman image wouldn't be released underneath us.
Use new function in virtio-gpu, where using it actually fixes
use-after-free crashes.
Cc: qemu-stable@nongnu.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 1459499240-742-1-git-send-email-kraxel@redhat.com
diff --git a/include/ui/console.h b/include/ui/console.h
index eb9419d..d5a88d9 100644
--- a/include/ui/console.h
+++ b/include/ui/console.h
@@ -234,6 +234,7 @@
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_displaysurface_guestmem(int width, int height,
pixman_format_code_t format,
int linesize,
