virtio-gpu: update scanout if there is any area covered by the rect

The scanout is currently updated only if the whole rect is inside the
scanout space. This is not a correct condition because the scanout should
be updated even a small area in the scanout space is covered by the rect.

Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Dongwon Kim <dongwon.kim@intel.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220909014052.7297-1-dongwon.kim@intel.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index 20cc703..5e15c79 100644 (file)
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -515,9 +515,10 @@ static void virtio_gpu_resource_flush(VirtIOGPU *g,
         for (i = 0; i < g->parent_obj.conf.max_outputs; i++) {
             scanout = &g->parent_obj.scanout[i];
             if (scanout->resource_id == res->resource_id &&
-                rf.r.x >= scanout->x && rf.r.y >= scanout->y &&
-                rf.r.x + rf.r.width <= scanout->x + scanout->width &&
-                rf.r.y + rf.r.height <= scanout->y + scanout->height &&
+                rf.r.x < scanout->x + scanout->width &&
+                rf.r.x + rf.r.width >= scanout->x &&
+                rf.r.y < scanout->y + scanout->height &&
+                rf.r.y + rf.r.height >= scanout->y &&
                 console_has_gl(scanout->con)) {
                 dpy_gl_update(scanout->con, 0, 0, scanout->width,
                               scanout->height);