5ee57ff4ba
# Objective Avoid ‘Unable to find a GPU! Make sure you have installed required drivers!’ . Because many devices only support OpenGL without Vulkan. Fixes #3191 ## Solution Use all backends supported by wgpu.
107 lines
4.3 KiB
Rust
107 lines
4.3 KiB
Rust
use std::borrow::Cow;
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pub use wgpu::{
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Backends, Dx12Compiler, Features as WgpuFeatures, Limits as WgpuLimits, PowerPreference,
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};
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/// Configures the priority used when automatically configuring the features/limits of `wgpu`.
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#[derive(Clone)]
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pub enum WgpuSettingsPriority {
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/// WebGPU default features and limits
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Compatibility,
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/// The maximum supported features and limits of the adapter and backend
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Functionality,
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/// WebGPU default limits plus additional constraints in order to be compatible with WebGL2
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WebGL2,
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}
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/// Provides configuration for renderer initialization. Use [`RenderDevice::features`](crate::renderer::RenderDevice::features),
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/// [`RenderDevice::limits`](crate::renderer::RenderDevice::limits), and the [`RenderAdapterInfo`](crate::renderer::RenderAdapterInfo)
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/// resource to get runtime information about the actual adapter, backend, features, and limits.
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/// NOTE: [`Backends::DX12`](Backends::DX12), [`Backends::METAL`](Backends::METAL), and
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/// [`Backends::VULKAN`](Backends::VULKAN) are enabled by default for non-web and the best choice
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/// is automatically selected. Web using the `webgl` feature uses [`Backends::GL`](Backends::GL).
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/// NOTE: If you want to use [`Backends::GL`](Backends::GL) in a native app on `Windows` and/or `macOS`, you must
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/// use [`ANGLE`](https://github.com/gfx-rs/wgpu#angle). This is because wgpu requires EGL to
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/// create a GL context without a window and only ANGLE supports that.
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#[derive(Clone)]
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pub struct WgpuSettings {
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pub device_label: Option<Cow<'static, str>>,
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pub backends: Option<Backends>,
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pub power_preference: PowerPreference,
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pub priority: WgpuSettingsPriority,
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/// The features to ensure are enabled regardless of what the adapter/backend supports.
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/// Setting these explicitly may cause renderer initialization to fail.
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pub features: WgpuFeatures,
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/// The features to ensure are disabled regardless of what the adapter/backend supports
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pub disabled_features: Option<WgpuFeatures>,
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/// The imposed limits.
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pub limits: WgpuLimits,
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/// The constraints on limits allowed regardless of what the adapter/backend supports
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pub constrained_limits: Option<WgpuLimits>,
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/// The shader compiler to use for the DX12 backend.
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pub dx12_shader_compiler: Dx12Compiler,
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}
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impl Default for WgpuSettings {
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fn default() -> Self {
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let default_backends = if cfg!(feature = "webgl") {
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Backends::GL
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} else {
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Backends::all()
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};
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let backends = Some(wgpu::util::backend_bits_from_env().unwrap_or(default_backends));
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let priority = settings_priority_from_env().unwrap_or(WgpuSettingsPriority::Functionality);
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let limits = if cfg!(feature = "webgl") || matches!(priority, WgpuSettingsPriority::WebGL2)
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{
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wgpu::Limits::downlevel_webgl2_defaults()
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} else {
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#[allow(unused_mut)]
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let mut limits = wgpu::Limits::default();
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#[cfg(feature = "ci_limits")]
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{
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limits.max_storage_textures_per_shader_stage = 4;
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limits.max_texture_dimension_3d = 1024;
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}
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limits
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};
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let dx12_compiler =
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wgpu::util::dx12_shader_compiler_from_env().unwrap_or(Dx12Compiler::Dxc {
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dxil_path: None,
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dxc_path: None,
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});
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Self {
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device_label: Default::default(),
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backends,
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power_preference: PowerPreference::HighPerformance,
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priority,
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features: wgpu::Features::TEXTURE_ADAPTER_SPECIFIC_FORMAT_FEATURES,
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disabled_features: None,
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limits,
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constrained_limits: None,
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dx12_shader_compiler: dx12_compiler,
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}
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}
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}
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/// Get a features/limits priority from the environment variable `WGPU_SETTINGS_PRIO`
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pub fn settings_priority_from_env() -> Option<WgpuSettingsPriority> {
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Some(
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match std::env::var("WGPU_SETTINGS_PRIO")
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.as_deref()
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.map(str::to_lowercase)
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.as_deref()
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{
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Ok("compatibility") => WgpuSettingsPriority::Compatibility,
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Ok("functionality") => WgpuSettingsPriority::Functionality,
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Ok("webgl2") => WgpuSettingsPriority::WebGL2,
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_ => return None,
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},
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)
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}
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