Flickering when animating cupertino widgets

[swift-kim]

Previously only on TM1 devices (#53), but it now also occurs on watch devices. Reproducible with the Gallery app.

[bbrto21]

It's been a while since this issue opened, but I've found no clue, Has anyone figured out anything?

[swift-kim]

The problem is not limited to cupertino widgets. The flickering also occurs for some material widgets in the Gallery app (to be more specific, the "Bottom app bar" page).

[swift-kim]

Here's simple reproduction code:

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(const MaterialApp(
    home: Scaffold(body: CupertinoNavigationBarDemo()),
  ));
}

class CupertinoNavigationBarDemo extends StatelessWidget {
  const CupertinoNavigationBarDemo({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Navigator(
      onGenerateRoute: (settings) {
        return CupertinoPageRoute(
          title: 'Navigator',
          settings: settings,
          builder: (context) {
            return CupertinoPageScaffold(
              child: CustomScrollView(
                slivers: [
                  const CupertinoSliverNavigationBar(),
                  SliverList(
                    delegate: SliverChildBuilderDelegate((context, index) {
                      return const ListTile(title: Text('Title'));
                    }, childCount: 20),
                  ),
                ],
              ),
            );
          },
        );
      },
    );
  }
}

Run this code on a watch or TM1 in release mode.

[swift-kim]

I encountered these error messages when I was testing my wayland renderer:

E/MALI    (31852): ==>[ERROR] (runner) [GLES] gles/src/surface/backend/mali_gles_surface_pixel_format_pfs_lx.c:1562 gles_surface_pixel_format_check_copy_tex_image_match 0x3:GLES_ERROR_INVALID_OPERATION in glCopyTexSubImage2D [glCopyTex* cannot copy from a channel that does not exist in the source]
E/MALI    (31852): ==>[ERROR] (runner) [GLES] gles/src/surface/backend/mali_gles_surface_pixel_format_pfs_lx.c:1562 gles_surface_pixel_format_check_copy_tex_image_match 0x3:GLES_ERROR_INVALID_OPERATION in glCopyTexSubImage2D [glCopyTex* cannot copy from a channel that does not exist in the source]
E/MALI    (31852): ==>[ERROR] (runner) [GLES] gles/src/surface/backend/mali_gles_surface_pixel_format_pfs_lx.c:1562 gles_surface_pixel_format_check_copy_tex_image_match 0x3:GLES_ERROR_INVALID_OPERATION in glCopyTexSubImage2D [glCopyTex* cannot copy from a channel that does not exist in the source]
E/MALI    (31852): ==>[ERROR] (runner) [GLES] gles/src/surface/backend/mali_gles_surface_pixel_format_pfs_lx.c:1562 gles_surface_pixel_format_check_copy_tex_image_match 0x3:GLES_ERROR_INVALID_OPERATION in glCopyTexSubImage2D [glCopyTex* cannot copy from a channel that does not exist in the source]
E/MALI    (31852): ==>[ERROR] (runner) [GLES] gles/src/surface/backend/mali_gles_surface_pixel_format_pfs_lx.c:1562 gles_surface_pixel_format_check_copy_tex_image_match 0x3:GLES_ERROR_INVALID_OPERATION in glCopyTexSubImage2D [glCopyTex* cannot copy from a channel that does not exist in the source]
E/MALI    (31852): ==>[ERROR] (runner) [GLES] gles/src/surface/backend/mali_gles_surface_pixel_format_pfs_lx.c:1562 gles_surface_pixel_format_check_copy_tex_image_match 0x3:GLES_ERROR_INVALID_OPERATION in glCopyTexSubImage2D [glCopyTex* cannot copy from a channel that does not exist in the source]
E/MALI    (31852): ==>[ERROR] (runner) [GLES] gles/src/surface/backend/mali_gles_surface_pixel_format_pfs_lx.c:1562 gles_surface_pixel_format_check_copy_tex_image_match 0x3:GLES_ERROR_INVALID_OPERATION in glCopyTexSubImage2D [glCopyTex* cannot copy from a channel that does not exist in the source]
E/MALI    (31852): ==>[ERROR] (runner) [GLES] gles/src/surface/backend/mali_gles_surface_pixel_format_pfs_lx.c:1562 gles_surface_pixel_format_check_copy_tex_image_match 0x3:GLES_ERROR_INVALID_OPERATION in glCopyTexSubImage2D [glCopyTex* cannot copy from a channel that does not exist in the source]

I don't know what the error is about but it could be related to this issue because it only happens when the app is rendering cupertino widgets.