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[Merged by Bors] - bevy_render: Do not automatically enable MAPPABLE_PRIMARY_BUFFERS #3698

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[Merged by Bors] - bevy_render: Do not automatically enable MAPPABLE_PRIMARY_BUFFERS #3698

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10 changes: 8 additions & 2 deletions crates/bevy_render/src/renderer/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -61,6 +61,11 @@ pub type RenderQueue = Arc<Queue>;
/// aswell as to create [`WindowSurfaces`](crate::view::window::WindowSurfaces).
pub type RenderInstance = Instance;

/// `wgpu::Features` that are not automatically enabled due to having possibly-negative side effects.
/// `MAPPABLE_PRIMARY_BUFFERS` can have a significant, negative performance impact so should not be
/// automatically enabled.
pub const DEFAULT_DISABLED_WGPU_FEATURES: wgpu::Features = wgpu::Features::MAPPABLE_PRIMARY_BUFFERS;

/// Initializes the renderer by retrieving and preparing the GPU instance, device and queue
/// for the specified backend.
pub async fn initialize_renderer(
Expand All @@ -86,8 +91,9 @@ pub async fn initialize_renderer(
let trace_path = None;

if matches!(options.priority, WgpuOptionsPriority::Functionality) {
options.features =
adapter.features() | wgpu::Features::TEXTURE_ADAPTER_SPECIFIC_FORMAT_FEATURES;
options.features = (adapter.features()
| wgpu::Features::TEXTURE_ADAPTER_SPECIFIC_FORMAT_FEATURES)
- DEFAULT_DISABLED_WGPU_FEATURES;
options.limits = adapter.limits();
}

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