499510489e
# Objective Implement `Eq` and `Hash` for the `BindGroup` and `BindGroupLayout` wrappers. ## Solution Implement based on the same assumption that the ID is unique, for consistency with `PartialEq`. ## Testing None; this should be straightforward. If there's an issue that would be a design one.
551 lines
24 KiB
Rust
551 lines
24 KiB
Rust
use crate::renderer::WgpuWrapper;
|
|
use crate::{
|
|
define_atomic_id,
|
|
render_asset::RenderAssets,
|
|
render_resource::{BindGroupLayout, Buffer, Sampler, TextureView},
|
|
renderer::RenderDevice,
|
|
texture::GpuImage,
|
|
};
|
|
use alloc::sync::Arc;
|
|
use bevy_derive::{Deref, DerefMut};
|
|
use bevy_ecs::system::{SystemParam, SystemParamItem};
|
|
pub use bevy_render_macros::AsBindGroup;
|
|
use core::ops::Deref;
|
|
use encase::ShaderType;
|
|
use thiserror::Error;
|
|
use wgpu::{BindGroupEntry, BindGroupLayoutEntry, BindingResource, TextureViewDimension};
|
|
|
|
define_atomic_id!(BindGroupId);
|
|
|
|
/// Bind groups are responsible for binding render resources (e.g. buffers, textures, samplers)
|
|
/// to a [`TrackedRenderPass`](crate::render_phase::TrackedRenderPass).
|
|
/// This makes them accessible in the pipeline (shaders) as uniforms.
|
|
///
|
|
/// This is a lightweight thread-safe wrapper around wgpu's own [`BindGroup`](wgpu::BindGroup),
|
|
/// which can be cloned as needed to workaround lifetime management issues. It may be converted
|
|
/// from and dereferences to wgpu's [`BindGroup`](wgpu::BindGroup).
|
|
///
|
|
/// Can be created via [`RenderDevice::create_bind_group`](RenderDevice::create_bind_group).
|
|
#[derive(Clone, Debug)]
|
|
pub struct BindGroup {
|
|
id: BindGroupId,
|
|
value: Arc<WgpuWrapper<wgpu::BindGroup>>,
|
|
}
|
|
|
|
impl BindGroup {
|
|
/// Returns the [`BindGroupId`] representing the unique ID of the bind group.
|
|
#[inline]
|
|
pub fn id(&self) -> BindGroupId {
|
|
self.id
|
|
}
|
|
}
|
|
|
|
impl PartialEq for BindGroup {
|
|
fn eq(&self, other: &Self) -> bool {
|
|
self.id == other.id
|
|
}
|
|
}
|
|
|
|
impl Eq for BindGroup {}
|
|
|
|
impl core::hash::Hash for BindGroup {
|
|
fn hash<H: core::hash::Hasher>(&self, state: &mut H) {
|
|
self.id.0.hash(state);
|
|
}
|
|
}
|
|
|
|
impl From<wgpu::BindGroup> for BindGroup {
|
|
fn from(value: wgpu::BindGroup) -> Self {
|
|
BindGroup {
|
|
id: BindGroupId::new(),
|
|
value: Arc::new(WgpuWrapper::new(value)),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'a> From<&'a BindGroup> for Option<&'a wgpu::BindGroup> {
|
|
fn from(value: &'a BindGroup) -> Self {
|
|
Some(value.deref())
|
|
}
|
|
}
|
|
|
|
impl<'a> From<&'a mut BindGroup> for Option<&'a wgpu::BindGroup> {
|
|
fn from(value: &'a mut BindGroup) -> Self {
|
|
Some(&*value)
|
|
}
|
|
}
|
|
|
|
impl Deref for BindGroup {
|
|
type Target = wgpu::BindGroup;
|
|
|
|
#[inline]
|
|
fn deref(&self) -> &Self::Target {
|
|
&self.value
|
|
}
|
|
}
|
|
|
|
/// Converts a value to a [`BindGroup`] with a given [`BindGroupLayout`], which can then be used in Bevy shaders.
|
|
/// This trait can be derived (and generally should be). Read on for details and examples.
|
|
///
|
|
/// This is an opinionated trait that is intended to make it easy to generically
|
|
/// convert a type into a [`BindGroup`]. It provides access to specific render resources,
|
|
/// such as [`RenderAssets<GpuImage>`] and [`crate::texture::FallbackImage`]. If a type has a [`Handle<Image>`](bevy_asset::Handle),
|
|
/// these can be used to retrieve the corresponding [`Texture`](crate::render_resource::Texture) resource.
|
|
///
|
|
/// [`AsBindGroup::as_bind_group`] is intended to be called once, then the result cached somewhere. It is generally
|
|
/// ok to do "expensive" work here, such as creating a [`Buffer`] for a uniform.
|
|
///
|
|
/// If for some reason a [`BindGroup`] cannot be created yet (for example, the [`Texture`](crate::render_resource::Texture)
|
|
/// for an [`Image`](bevy_image::Image) hasn't loaded yet), just return [`AsBindGroupError::RetryNextUpdate`], which signals that the caller
|
|
/// should retry again later.
|
|
///
|
|
/// # Deriving
|
|
///
|
|
/// This trait can be derived. Field attributes like `uniform` and `texture` are used to define which fields should be bindings,
|
|
/// what their binding type is, and what index they should be bound at:
|
|
///
|
|
/// ```
|
|
/// # use bevy_render::render_resource::*;
|
|
/// # use bevy_image::Image;
|
|
/// # use bevy_color::LinearRgba;
|
|
/// # use bevy_asset::Handle;
|
|
/// # use bevy_render::storage::ShaderStorageBuffer;
|
|
///
|
|
/// #[derive(AsBindGroup)]
|
|
/// struct CoolMaterial {
|
|
/// #[uniform(0)]
|
|
/// color: LinearRgba,
|
|
/// #[texture(1)]
|
|
/// #[sampler(2)]
|
|
/// color_texture: Handle<Image>,
|
|
/// #[storage(3, read_only)]
|
|
/// storage_buffer: Handle<ShaderStorageBuffer>,
|
|
/// #[storage(4, read_only, buffer)]
|
|
/// raw_buffer: Buffer,
|
|
/// #[storage_texture(5)]
|
|
/// storage_texture: Handle<Image>,
|
|
/// }
|
|
/// ```
|
|
///
|
|
/// In WGSL shaders, the binding would look like this:
|
|
///
|
|
/// ```wgsl
|
|
/// @group(2) @binding(0) var<uniform> color: vec4<f32>;
|
|
/// @group(2) @binding(1) var color_texture: texture_2d<f32>;
|
|
/// @group(2) @binding(2) var color_sampler: sampler;
|
|
/// @group(2) @binding(3) var<storage> storage_buffer: array<f32>;
|
|
/// @group(2) @binding(4) var<storage> raw_buffer: array<f32>;
|
|
/// @group(2) @binding(5) var storage_texture: texture_storage_2d<rgba8unorm, read_write>;
|
|
/// ```
|
|
/// Note that the "group" index is determined by the usage context. It is not defined in [`AsBindGroup`]. For example, in Bevy material bind groups
|
|
/// are generally bound to group 2.
|
|
///
|
|
/// The following field-level attributes are supported:
|
|
///
|
|
/// * `uniform(BINDING_INDEX)`
|
|
/// * The field will be converted to a shader-compatible type using the [`ShaderType`] trait, written to a [`Buffer`], and bound as a uniform.
|
|
/// [`ShaderType`] is implemented for most math types already, such as [`f32`], [`Vec4`](bevy_math::Vec4), and
|
|
/// [`LinearRgba`](bevy_color::LinearRgba). It can also be derived for custom structs.
|
|
///
|
|
/// * `texture(BINDING_INDEX, arguments)`
|
|
/// * This field's [`Handle<Image>`](bevy_asset::Handle) will be used to look up the matching [`Texture`](crate::render_resource::Texture)
|
|
/// GPU resource, which will be bound as a texture in shaders. The field will be assumed to implement [`Into<Option<Handle<Image>>>`]. In practice,
|
|
/// most fields should be a [`Handle<Image>`](bevy_asset::Handle) or [`Option<Handle<Image>>`]. If the value of an [`Option<Handle<Image>>`] is
|
|
/// [`None`], the [`crate::texture::FallbackImage`] resource will be used instead. This attribute can be used in conjunction with a `sampler` binding attribute
|
|
/// (with a different binding index) if a binding of the sampler for the [`Image`](bevy_image::Image) is also required.
|
|
///
|
|
/// | Arguments | Values | Default |
|
|
/// |-----------------------|-------------------------------------------------------------------------|----------------------|
|
|
/// | `dimension` = "..." | `"1d"`, `"2d"`, `"2d_array"`, `"3d"`, `"cube"`, `"cube_array"` | `"2d"` |
|
|
/// | `sample_type` = "..." | `"float"`, `"depth"`, `"s_int"` or `"u_int"` | `"float"` |
|
|
/// | `filterable` = ... | `true`, `false` | `true` |
|
|
/// | `multisampled` = ... | `true`, `false` | `false` |
|
|
/// | `visibility(...)` | `all`, `none`, or a list-combination of `vertex`, `fragment`, `compute` | `vertex`, `fragment` |
|
|
///
|
|
/// * `storage_texture(BINDING_INDEX, arguments)`
|
|
/// * This field's [`Handle<Image>`](bevy_asset::Handle) will be used to look up the matching [`Texture`](crate::render_resource::Texture)
|
|
/// GPU resource, which will be bound as a storage texture in shaders. The field will be assumed to implement [`Into<Option<Handle<Image>>>`]. In practice,
|
|
/// most fields should be a [`Handle<Image>`](bevy_asset::Handle) or [`Option<Handle<Image>>`]. If the value of an [`Option<Handle<Image>>`] is
|
|
/// [`None`], the [`crate::texture::FallbackImage`] resource will be used instead.
|
|
///
|
|
/// | Arguments | Values | Default |
|
|
/// |------------------------|--------------------------------------------------------------------------------------------|---------------|
|
|
/// | `dimension` = "..." | `"1d"`, `"2d"`, `"2d_array"`, `"3d"`, `"cube"`, `"cube_array"` | `"2d"` |
|
|
/// | `image_format` = ... | any member of [`TextureFormat`](crate::render_resource::TextureFormat) | `Rgba8Unorm` |
|
|
/// | `access` = ... | any member of [`StorageTextureAccess`](crate::render_resource::StorageTextureAccess) | `ReadWrite` |
|
|
/// | `visibility(...)` | `all`, `none`, or a list-combination of `vertex`, `fragment`, `compute` | `compute` |
|
|
///
|
|
/// * `sampler(BINDING_INDEX, arguments)`
|
|
/// * This field's [`Handle<Image>`](bevy_asset::Handle) will be used to look up the matching [`Sampler`] GPU
|
|
/// resource, which will be bound as a sampler in shaders. The field will be assumed to implement [`Into<Option<Handle<Image>>>`]. In practice,
|
|
/// most fields should be a [`Handle<Image>`](bevy_asset::Handle) or [`Option<Handle<Image>>`]. If the value of an [`Option<Handle<Image>>`] is
|
|
/// [`None`], the [`crate::texture::FallbackImage`] resource will be used instead. This attribute can be used in conjunction with a `texture` binding attribute
|
|
/// (with a different binding index) if a binding of the texture for the [`Image`](bevy_image::Image) is also required.
|
|
///
|
|
/// | Arguments | Values | Default |
|
|
/// |------------------------|-------------------------------------------------------------------------|------------------------|
|
|
/// | `sampler_type` = "..." | `"filtering"`, `"non_filtering"`, `"comparison"`. | `"filtering"` |
|
|
/// | `visibility(...)` | `all`, `none`, or a list-combination of `vertex`, `fragment`, `compute` | `vertex`, `fragment` |
|
|
/// * `storage(BINDING_INDEX, arguments)`
|
|
/// * The field's [`Handle<Storage>`](bevy_asset::Handle) will be used to look up the matching [`Buffer`] GPU resource, which
|
|
/// will be bound as a storage buffer in shaders. If the `storage` attribute is used, the field is expected a raw
|
|
/// buffer, and the buffer will be bound as a storage buffer in shaders.
|
|
/// * It supports an optional `read_only` parameter. Defaults to false if not present.
|
|
///
|
|
/// | Arguments | Values | Default |
|
|
/// |------------------------|-------------------------------------------------------------------------|----------------------|
|
|
/// | `visibility(...)` | `all`, `none`, or a list-combination of `vertex`, `fragment`, `compute` | `vertex`, `fragment` |
|
|
/// | `read_only` | if present then value is true, otherwise false | `false` |
|
|
/// | `buffer` | if present then the field will be assumed to be a raw wgpu buffer | |
|
|
///
|
|
/// Note that fields without field-level binding attributes will be ignored.
|
|
/// ```
|
|
/// # use bevy_render::{render_resource::AsBindGroup};
|
|
/// # use bevy_color::LinearRgba;
|
|
/// # use bevy_asset::Handle;
|
|
/// #[derive(AsBindGroup)]
|
|
/// struct CoolMaterial {
|
|
/// #[uniform(0)]
|
|
/// color: LinearRgba,
|
|
/// this_field_is_ignored: String,
|
|
/// }
|
|
/// ```
|
|
///
|
|
/// As mentioned above, [`Option<Handle<Image>>`] is also supported:
|
|
/// ```
|
|
/// # use bevy_asset::Handle;
|
|
/// # use bevy_color::LinearRgba;
|
|
/// # use bevy_image::Image;
|
|
/// # use bevy_render::render_resource::AsBindGroup;
|
|
/// #[derive(AsBindGroup)]
|
|
/// struct CoolMaterial {
|
|
/// #[uniform(0)]
|
|
/// color: LinearRgba,
|
|
/// #[texture(1)]
|
|
/// #[sampler(2)]
|
|
/// color_texture: Option<Handle<Image>>,
|
|
/// }
|
|
/// ```
|
|
/// This is useful if you want a texture to be optional. When the value is [`None`], the [`crate::texture::FallbackImage`] will be used for the binding instead, which defaults
|
|
/// to "pure white".
|
|
///
|
|
/// Field uniforms with the same index will be combined into a single binding:
|
|
/// ```
|
|
/// # use bevy_render::{render_resource::AsBindGroup};
|
|
/// # use bevy_color::LinearRgba;
|
|
/// #[derive(AsBindGroup)]
|
|
/// struct CoolMaterial {
|
|
/// #[uniform(0)]
|
|
/// color: LinearRgba,
|
|
/// #[uniform(0)]
|
|
/// roughness: f32,
|
|
/// }
|
|
/// ```
|
|
///
|
|
/// In WGSL shaders, the binding would look like this:
|
|
/// ```wgsl
|
|
/// struct CoolMaterial {
|
|
/// color: vec4<f32>,
|
|
/// roughness: f32,
|
|
/// };
|
|
///
|
|
/// @group(2) @binding(0) var<uniform> material: CoolMaterial;
|
|
/// ```
|
|
///
|
|
/// Some less common scenarios will require "struct-level" attributes. These are the currently supported struct-level attributes:
|
|
/// * `uniform(BINDING_INDEX, ConvertedShaderType)`
|
|
/// * This also creates a [`Buffer`] using [`ShaderType`] and binds it as a uniform, much
|
|
/// like the field-level `uniform` attribute. The difference is that the entire [`AsBindGroup`] value is converted to `ConvertedShaderType`,
|
|
/// which must implement [`ShaderType`], instead of a specific field implementing [`ShaderType`]. This is useful if more complicated conversion
|
|
/// logic is required. The conversion is done using the [`AsBindGroupShaderType<ConvertedShaderType>`] trait, which is automatically implemented
|
|
/// if `&Self` implements [`Into<ConvertedShaderType>`]. Only use [`AsBindGroupShaderType`] if access to resources like [`RenderAssets<GpuImage>`] is
|
|
/// required.
|
|
/// * `bind_group_data(DataType)`
|
|
/// * The [`AsBindGroup`] type will be converted to some `DataType` using [`Into<DataType>`] and stored
|
|
/// as [`AsBindGroup::Data`] as part of the [`AsBindGroup::as_bind_group`] call. This is useful if data needs to be stored alongside
|
|
/// the generated bind group, such as a unique identifier for a material's bind group. The most common use case for this attribute
|
|
/// is "shader pipeline specialization". See [`SpecializedRenderPipeline`](crate::render_resource::SpecializedRenderPipeline).
|
|
/// * `bindless(COUNT)`
|
|
/// * This switch enables *bindless resources*, which changes the way Bevy
|
|
/// supplies resources (uniforms, textures, and samplers) to the shader.
|
|
/// When bindless resources are enabled, and the current platform supports
|
|
/// them, instead of presenting a single instance of a resource to your
|
|
/// shader Bevy will instead present a *binding array* of `COUNT` elements.
|
|
/// In your shader, the index of the element of each binding array
|
|
/// corresponding to the mesh currently being drawn can be retrieved with
|
|
/// `mesh[in.instance_index].material_and_lightmap_bind_group_slot &
|
|
/// 0xffffu`.
|
|
/// * Bindless uniforms don't exist, so in bindless mode all uniforms and
|
|
/// uniform buffers are automatically replaced with read-only storage
|
|
/// buffers.
|
|
/// * The purpose of bindless mode is to improve performance by reducing
|
|
/// state changes. By grouping resources together into binding arrays, Bevy
|
|
/// doesn't have to modify GPU state as often, decreasing API and driver
|
|
/// overhead.
|
|
/// * If bindless mode is enabled, the `BINDLESS` definition will be
|
|
/// available. Because not all platforms support bindless resources, you
|
|
/// should check for the presence of this definition via `#ifdef` and fall
|
|
/// back to standard bindings if it isn't present.
|
|
/// * See the `shaders/shader_material_bindless` example for an example of
|
|
/// how to use bindless mode.
|
|
///
|
|
/// The previous `CoolMaterial` example illustrating "combining multiple field-level uniform attributes with the same binding index" can
|
|
/// also be equivalently represented with a single struct-level uniform attribute:
|
|
/// ```
|
|
/// # use bevy_render::{render_resource::{AsBindGroup, ShaderType}};
|
|
/// # use bevy_color::LinearRgba;
|
|
/// #[derive(AsBindGroup)]
|
|
/// #[uniform(0, CoolMaterialUniform)]
|
|
/// struct CoolMaterial {
|
|
/// color: LinearRgba,
|
|
/// roughness: f32,
|
|
/// }
|
|
///
|
|
/// #[derive(ShaderType)]
|
|
/// struct CoolMaterialUniform {
|
|
/// color: LinearRgba,
|
|
/// roughness: f32,
|
|
/// }
|
|
///
|
|
/// impl From<&CoolMaterial> for CoolMaterialUniform {
|
|
/// fn from(material: &CoolMaterial) -> CoolMaterialUniform {
|
|
/// CoolMaterialUniform {
|
|
/// color: material.color,
|
|
/// roughness: material.roughness,
|
|
/// }
|
|
/// }
|
|
/// }
|
|
/// ```
|
|
///
|
|
/// Setting `bind_group_data` looks like this:
|
|
/// ```
|
|
/// # use bevy_render::{render_resource::AsBindGroup};
|
|
/// # use bevy_color::LinearRgba;
|
|
/// #[derive(AsBindGroup)]
|
|
/// #[bind_group_data(CoolMaterialKey)]
|
|
/// struct CoolMaterial {
|
|
/// #[uniform(0)]
|
|
/// color: LinearRgba,
|
|
/// is_shaded: bool,
|
|
/// }
|
|
///
|
|
/// #[derive(Copy, Clone, Hash, Eq, PartialEq)]
|
|
/// struct CoolMaterialKey {
|
|
/// is_shaded: bool,
|
|
/// }
|
|
///
|
|
/// impl From<&CoolMaterial> for CoolMaterialKey {
|
|
/// fn from(material: &CoolMaterial) -> CoolMaterialKey {
|
|
/// CoolMaterialKey {
|
|
/// is_shaded: material.is_shaded,
|
|
/// }
|
|
/// }
|
|
/// }
|
|
/// ```
|
|
pub trait AsBindGroup {
|
|
/// Data that will be stored alongside the "prepared" bind group.
|
|
type Data: Send + Sync;
|
|
|
|
type Param: SystemParam + 'static;
|
|
|
|
/// The number of slots per bind group, if bindless mode is enabled.
|
|
///
|
|
/// If this bind group doesn't use bindless, then this will be `None`.
|
|
///
|
|
/// Note that the *actual* slot count may be different from this value, due
|
|
/// to platform limitations. For example, if bindless resources aren't
|
|
/// supported on this platform, the actual slot count will be 1.
|
|
fn bindless_slot_count() -> Option<u32> {
|
|
None
|
|
}
|
|
|
|
/// True if the hardware *actually* supports bindless textures for this
|
|
/// type, taking the device and driver capabilities into account.
|
|
///
|
|
/// If this type doesn't use bindless textures, then the return value from
|
|
/// this function is meaningless.
|
|
fn bindless_supported(_: &RenderDevice) -> bool {
|
|
true
|
|
}
|
|
|
|
/// label
|
|
fn label() -> Option<&'static str> {
|
|
None
|
|
}
|
|
|
|
/// Creates a bind group for `self` matching the layout defined in [`AsBindGroup::bind_group_layout`].
|
|
fn as_bind_group(
|
|
&self,
|
|
layout: &BindGroupLayout,
|
|
render_device: &RenderDevice,
|
|
param: &mut SystemParamItem<'_, '_, Self::Param>,
|
|
) -> Result<PreparedBindGroup<Self::Data>, AsBindGroupError> {
|
|
let UnpreparedBindGroup { bindings, data } =
|
|
Self::unprepared_bind_group(self, layout, render_device, param, false)?;
|
|
|
|
let entries = bindings
|
|
.iter()
|
|
.map(|(index, binding)| BindGroupEntry {
|
|
binding: *index,
|
|
resource: binding.get_binding(),
|
|
})
|
|
.collect::<Vec<_>>();
|
|
|
|
let bind_group = render_device.create_bind_group(Self::label(), layout, &entries);
|
|
|
|
Ok(PreparedBindGroup {
|
|
bindings,
|
|
bind_group,
|
|
data,
|
|
})
|
|
}
|
|
|
|
/// Returns a vec of (binding index, `OwnedBindingResource`).
|
|
///
|
|
/// In cases where `OwnedBindingResource` is not available (as for bindless
|
|
/// texture arrays currently), an implementor may return
|
|
/// `AsBindGroupError::CreateBindGroupDirectly` from this function and
|
|
/// instead define `as_bind_group` directly. This may prevent certain
|
|
/// features, such as bindless mode, from working correctly.
|
|
///
|
|
/// Set `force_no_bindless` to true to require that bindless textures *not*
|
|
/// be used. `ExtendedMaterial` uses this in order to ensure that the base
|
|
/// material doesn't use bindless mode if the extension doesn't.
|
|
fn unprepared_bind_group(
|
|
&self,
|
|
layout: &BindGroupLayout,
|
|
render_device: &RenderDevice,
|
|
param: &mut SystemParamItem<'_, '_, Self::Param>,
|
|
force_no_bindless: bool,
|
|
) -> Result<UnpreparedBindGroup<Self::Data>, AsBindGroupError>;
|
|
|
|
/// Creates the bind group layout matching all bind groups returned by
|
|
/// [`AsBindGroup::as_bind_group`]
|
|
fn bind_group_layout(render_device: &RenderDevice) -> BindGroupLayout
|
|
where
|
|
Self: Sized,
|
|
{
|
|
render_device.create_bind_group_layout(
|
|
Self::label(),
|
|
&Self::bind_group_layout_entries(render_device, false),
|
|
)
|
|
}
|
|
|
|
/// Returns a vec of bind group layout entries.
|
|
///
|
|
/// Set `force_no_bindless` to true to require that bindless textures *not*
|
|
/// be used. `ExtendedMaterial` uses this in order to ensure that the base
|
|
/// material doesn't use bindless mode if the extension doesn't.
|
|
fn bind_group_layout_entries(
|
|
render_device: &RenderDevice,
|
|
force_no_bindless: bool,
|
|
) -> Vec<BindGroupLayoutEntry>
|
|
where
|
|
Self: Sized;
|
|
}
|
|
|
|
/// An error that occurs during [`AsBindGroup::as_bind_group`] calls.
|
|
#[derive(Debug, Error)]
|
|
pub enum AsBindGroupError {
|
|
/// The bind group could not be generated. Try again next frame.
|
|
#[error("The bind group could not be generated")]
|
|
RetryNextUpdate,
|
|
#[error("Create the bind group via `as_bind_group()` instead")]
|
|
CreateBindGroupDirectly,
|
|
#[error("At binding index {0}, the provided image sampler `{1}` does not match the required sampler type(s) `{2}`.")]
|
|
InvalidSamplerType(u32, String, String),
|
|
}
|
|
|
|
/// A prepared bind group returned as a result of [`AsBindGroup::as_bind_group`].
|
|
pub struct PreparedBindGroup<T> {
|
|
pub bindings: BindingResources,
|
|
pub bind_group: BindGroup,
|
|
pub data: T,
|
|
}
|
|
|
|
/// a map containing `OwnedBindingResource`s, keyed by the target binding index
|
|
pub struct UnpreparedBindGroup<T> {
|
|
pub bindings: BindingResources,
|
|
pub data: T,
|
|
}
|
|
|
|
/// A pair of binding index and binding resource, used as part of
|
|
/// [`PreparedBindGroup`] and [`UnpreparedBindGroup`].
|
|
#[derive(Deref, DerefMut)]
|
|
pub struct BindingResources(pub Vec<(u32, OwnedBindingResource)>);
|
|
|
|
/// An owned binding resource of any type (ex: a [`Buffer`], [`TextureView`], etc).
|
|
/// This is used by types like [`PreparedBindGroup`] to hold a single list of all
|
|
/// render resources used by bindings.
|
|
#[derive(Debug)]
|
|
pub enum OwnedBindingResource {
|
|
Buffer(Buffer),
|
|
TextureView(TextureViewDimension, TextureView),
|
|
Sampler(Sampler),
|
|
}
|
|
|
|
impl OwnedBindingResource {
|
|
pub fn get_binding(&self) -> BindingResource {
|
|
match self {
|
|
OwnedBindingResource::Buffer(buffer) => buffer.as_entire_binding(),
|
|
OwnedBindingResource::TextureView(_, view) => BindingResource::TextureView(view),
|
|
OwnedBindingResource::Sampler(sampler) => BindingResource::Sampler(sampler),
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Converts a value to a [`ShaderType`] for use in a bind group.
|
|
///
|
|
/// This is automatically implemented for references that implement [`Into`].
|
|
/// Generally normal [`Into`] / [`From`] impls should be preferred, but
|
|
/// sometimes additional runtime metadata is required.
|
|
/// This exists largely to make some [`AsBindGroup`] use cases easier.
|
|
pub trait AsBindGroupShaderType<T: ShaderType> {
|
|
/// Return the `T` [`ShaderType`] for `self`. When used in [`AsBindGroup`]
|
|
/// derives, it is safe to assume that all images in `self` exist.
|
|
fn as_bind_group_shader_type(&self, images: &RenderAssets<GpuImage>) -> T;
|
|
}
|
|
|
|
impl<T, U: ShaderType> AsBindGroupShaderType<U> for T
|
|
where
|
|
for<'a> &'a T: Into<U>,
|
|
{
|
|
#[inline]
|
|
fn as_bind_group_shader_type(&self, _images: &RenderAssets<GpuImage>) -> U {
|
|
self.into()
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod test {
|
|
use super::*;
|
|
use crate as bevy_render;
|
|
use bevy_asset::Handle;
|
|
use bevy_image::Image;
|
|
|
|
#[test]
|
|
fn texture_visibility() {
|
|
#[derive(AsBindGroup)]
|
|
pub struct TextureVisibilityTest {
|
|
#[texture(0, visibility(all))]
|
|
pub all: Handle<Image>,
|
|
#[texture(1, visibility(none))]
|
|
pub none: Handle<Image>,
|
|
#[texture(2, visibility(fragment))]
|
|
pub fragment: Handle<Image>,
|
|
#[texture(3, visibility(vertex))]
|
|
pub vertex: Handle<Image>,
|
|
#[texture(4, visibility(compute))]
|
|
pub compute: Handle<Image>,
|
|
#[texture(5, visibility(vertex, fragment))]
|
|
pub vertex_fragment: Handle<Image>,
|
|
#[texture(6, visibility(vertex, compute))]
|
|
pub vertex_compute: Handle<Image>,
|
|
#[texture(7, visibility(fragment, compute))]
|
|
pub fragment_compute: Handle<Image>,
|
|
#[texture(8, visibility(vertex, fragment, compute))]
|
|
pub vertex_fragment_compute: Handle<Image>,
|
|
}
|
|
}
|
|
}
|