Bevy Not enough memory left error

Bevy Not enough memory left error

在笔记本环境下，默认启动intel的集成显卡，cargo run 执行bevy的测试例子，会发现窗口图形无法正常启动，报错信息如下：

thread 'main' panicked at /home/chen/.cargo/registry/src/mirrors.ustc.edu.cn-4affec411d11e50f/wgpu-0.17.2/src/backend/direct.rs:771:18:
Error in Surface::configure: Validation Error

Caused by:
    Not enough memory left

note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Encountered a panic in system `bevy_render::view::window::prepare_windows`!
thread 'Compute Task Pool (3)' panicked at /home/chen/.cargo/registry/src/mirrors.ustc.edu.cn-4affec411d11e50f/bevy_render-0.12.1/src/pipelined_rendering.rs:145:45:
called `Result::unwrap()` on an `Err` value: RecvError

原因是，wgpu默认使用了GPU卡，而笔记本上需要用optimus-manager设置高性能模式启动gpu卡

如果不希望用gpu卡，使用Intel集成显卡，需要设置代码配置wgpu，参考代码：

bevy version : 0.13

    App.new()
    .add_plugins((
        DefaultPlugins.set(RenderPlugin {
        render_creation: RenderCreation::Automatic(WgpuSettings {
            power_preference: PowerPreference::LowPower,
            ..default()
        }),
        ..Default::default()
        }),
        HelloPlugin,
    )).run();

可以正常启动示例。

RenderPlugin的结构体可能还会变更，需要参考最新的api调整代码

https://docs.rs/bevy/latest/bevy/render/struct.RenderPlugin.html