improve waiting for image when only one image received (#7340)

* fix padding of mobile server page PopupMenuItem

Signed-off-by: 21pages <pages21@163.com>

* improve waiting for image when only one image received

* For flutter texture late creation: create texture between session add and session start, it works not in principle but in test.
* For late PeerInfo handling
	a. rgba texture render: allow zero size in on_rgba
	b. gpu texture render and rgba buffer render doesn't check size currently
* Fix wrong valid flag of first frame in rgba texture render

Other issues:
* decodeImageFromPixels may fail on first image
* Correct width/height when resolution changes

Signed-off-by: 21pages <pages21@163.com>

---------

Signed-off-by: 21pages <pages21@163.com>

src/flutter.rs

@@ -400,7 +400,6 @@ impl VideoRenderer {
             return false;
         }
 
-        // It is also Ok to skip this check.
         if info.size.0 != rgba.w || info.size.1 != rgba.h {
             log::error!(
                 "width/height mismatch: ({},{}) != ({},{})",
@@ -409,7 +408,11 @@ impl VideoRenderer {
                 rgba.w,
                 rgba.h
             );
-            return false;
+            // Peer info's handling is async and may be late than video frame's handling
+            // Allow peer info not set, but not allow wrong width/height for correct local cursor position
+            if info.size != (0, 0) {
+                return false;
+            }
         }
         if let Some(func) = &self.on_rgba_func {
             unsafe {
@@ -763,6 +766,7 @@ impl InvokeUiSession for FlutterHandler {
         } else {
             let mut rgba_data = RgbaData::default();
             std::mem::swap::<Vec<u8>>(&mut rgba.raw, &mut rgba_data.data);
+            rgba_data.valid = true;
             rgba_write_lock.insert(display, rgba_data);
         }
         drop(rgba_write_lock);