Struct wgpu::Features[][src]

#[repr(transparent)]
pub struct Features { /* fields omitted */ }
Expand description

Features that are not guaranteed to be supported.

These are either part of the webgpu standard, or are extension features supported by wgpu when targeting native.

If you want to use a feature, you need to first verify that the adapter supports the feature. If the adapter does not support the feature, requesting a device with it enabled will panic.

Implementations

Mask of all features which are part of the upstream WebGPU standard.

Mask of all features that are only available when targeting native (not web).

By default, polygon depth is clipped to 0-1 range. Anything outside of that range is rejected, and respective fragments are not touched.

With this extension, we can force clamping of the polygon depth to 0-1. That allows shadow map occluders to be rendered into a tighter depth range.

Supported platforms:

  • desktops
  • some mobile chips

This is a web and native feature.

Enables BCn family of compressed textures. All BCn textures use 4x4 pixel blocks with 8 or 16 bytes per block.

Compressed textures sacrifice some quality in exchange for significantly reduced bandwidth usage.

Support for this feature guarantees availability of [TextureUsages::COPY_SRC | TextureUsages::COPY_DST | TextureUsages::TEXTURE_BINDING] for BCn formats. Features::TEXTURE_ADAPTER_SPECIFIC_FORMAT_FEATURES may enable additional usages.

Supported Platforms:

  • desktops

This is a web and native feature.

Enables use of Timestamp Queries. These queries tell the current gpu timestamp when all work before the query is finished. Call [CommandEncoder::write_timestamp], [RenderPassEncoder::write_timestamp], or [ComputePassEncoder::write_timestamp] to write out a timestamp.

They must be resolved using [CommandEncoder::resolve_query_sets] into a buffer, then the result must be multiplied by the timestamp period [Device::get_timestamp_period] to get the timestamp in nanoseconds. Multiple timestamps can then be diffed to get the time for operations between them to finish.

Due to wgpu-hal limitations, this is only supported on vulkan for now.

Supported Platforms:

  • Vulkan (works)
  • DX12 (works)

This is a web and native feature.

Enables use of Pipeline Statistics Queries. These queries tell the count of various operations performed between the start and stop call. Call [RenderPassEncoder::begin_pipeline_statistics_query] to start a query, then call [RenderPassEncoder::end_pipeline_statistics_query] to stop one.

They must be resolved using [CommandEncoder::resolve_query_sets] into a buffer. The rules on how these resolve into buffers are detailed in the documentation for PipelineStatisticsTypes.

Due to wgpu-hal limitations, this is only supported on vulkan for now.

Supported Platforms:

  • Vulkan (works)
  • DX12 (works)

This is a web and native feature.

Webgpu only allows the MAP_READ and MAP_WRITE buffer usage to be matched with COPY_DST and COPY_SRC respectively. This removes this requirement.

This is only beneficial on systems that share memory between CPU and GPU. If enabled on a system that doesn’t, this can severely hinder performance. Only use if you understand the consequences.

Supported platforms:

  • All

This is a native only feature.

Allows the user to create uniform arrays of textures in shaders:

eg. uniform texture2D textures[10].

If Features::STORAGE_RESOURCE_BINDING_ARRAY is supported as well as this, the user may also create uniform arrays of storage textures.

eg. uniform image2D textures[10].

This capability allows them to exist and to be indexed by dynamically uniform values.

Supported platforms:

  • DX12
  • Metal (with MSL 2.0+ on macOS 10.13+)
  • Vulkan

This is a native only feature.

Allows the user to create arrays of buffers in shaders:

eg. uniform myBuffer { .... } buffer_array[10].

This capability allows them to exist and to be indexed by dynamically uniform values.

If Features::STORAGE_RESOURCE_BINDING_ARRAY is supported as well as this, the user may also create arrays of storage buffers.

eg. buffer myBuffer { ... } buffer_array[10]

Supported platforms:

  • DX12
  • Vulkan

This is a native only feature.

Allows the user to create uniform arrays of storage buffers or textures in shaders, if resp. Features::BUFFER_BINDING_ARRAY or Features::TEXTURE_BINDING_ARRAY is supported.

This capability allows them to exist and to be indexed by dynamically uniform values.

Supported platforms:

  • Metal (with MSL 2.2+ on macOS 10.13+)
  • Vulkan

This is a native only feature.

Allows shaders to index sampled texture and storage buffer resource arrays with dynamically non-uniform values:

eg. texture_array[vertex_data]

In order to use this capability, the corresponding GLSL extension must be enabled like so:

#extension GL_EXT_nonuniform_qualifier : require

and then used either as nonuniformEXT qualifier in variable declaration:

eg. layout(location = 0) nonuniformEXT flat in int vertex_data;

or as nonuniformEXT constructor:

eg. texture_array[nonuniformEXT(vertex_data)]

HLSL does not need any extension.

Supported platforms:

  • DX12
  • Metal (with MSL 2.0+ on macOS 10.13+)
  • Vulkan 1.2+ (or VK_EXT_descriptor_indexing)’s shaderSampledImageArrayNonUniformIndexing & shaderStorageBufferArrayNonUniformIndexing feature)

This is a native only feature.

Allows shaders to index uniform buffer and storage texture resource arrays with dynamically non-uniform values:

eg. texture_array[vertex_data]

In order to use this capability, the corresponding GLSL extension must be enabled like so:

#extension GL_EXT_nonuniform_qualifier : require

and then used either as nonuniformEXT qualifier in variable declaration:

eg. layout(location = 0) nonuniformEXT flat in int vertex_data;

or as nonuniformEXT constructor:

eg. texture_array[nonuniformEXT(vertex_data)]

HLSL does not need any extension.

Supported platforms:

  • DX12
  • Metal (with MSL 2.0+ on macOS 10.13+)
  • Vulkan 1.2+ (or VK_EXT_descriptor_indexing)’s shaderUniformBufferArrayNonUniformIndexing & shaderStorageTextureArrayNonUniformIndexing feature)

This is a native only feature.

Allows the user to create bind groups continaing arrays with less bindings than the BindGroupLayout.

This is a native only feature.

Allows the user to create unsized uniform arrays of bindings:

eg. uniform texture2D textures[].

Supported platforms:

  • DX12
  • Vulkan 1.2+ (or VK_EXT_descriptor_indexing)’s runtimeDescriptorArray feature

This is a native only feature.

Allows the user to call [RenderPass::multi_draw_indirect] and [RenderPass::multi_draw_indexed_indirect].

Allows multiple indirect calls to be dispatched from a single buffer.

Supported platforms:

  • DX12
  • Vulkan

This is a native only feature.

Allows the user to call [RenderPass::multi_draw_indirect_count] and [RenderPass::multi_draw_indexed_indirect_count].

This allows the use of a buffer containing the actual number of draw calls.

Supported platforms:

  • DX12
  • Vulkan 1.2+ (or VK_KHR_draw_indirect_count)

This is a native only feature.

Allows the use of push constants: small, fast bits of memory that can be updated inside a [RenderPass].

Allows the user to call [RenderPass::set_push_constants], provide a non-empty array to [PipelineLayoutDescriptor], and provide a non-zero limit to Limits::max_push_constant_size.

A block of push constants can be declared with layout(push_constant) uniform Name {..} in shaders.

Supported platforms:

  • DX12
  • Vulkan
  • Metal
  • DX11 (emulated with uniforms)
  • OpenGL (emulated with uniforms)

This is a native only feature.

Allows the use of AddressMode::ClampToBorder.

Supported platforms:

  • DX12
  • Vulkan
  • Metal (macOS 10.12+ only)
  • DX11
  • OpenGL

This is a web and native feature.

Allows the user to set PolygonMode::Line in PrimitiveState::polygon_mode

This allows drawing polygons/triangles as lines (wireframe) instead of filled

Supported platforms:

  • DX12
  • Vulkan
  • Metal

This is a native only feature.

Allows the user to set PolygonMode::Point in PrimitiveState::polygon_mode

This allows only drawing the vertices of polygons/triangles instead of filled

Supported platforms:

  • DX12
  • Vulkan

This is a native only feature.

Enables ETC family of compressed textures. All ETC textures use 4x4 pixel blocks. ETC2 RGB and RGBA1 are 8 bytes per block. RTC2 RGBA8 and EAC are 16 bytes per block.

Compressed textures sacrifice some quality in exchange for significantly reduced bandwidth usage.

Support for this feature guarantees availability of [TextureUsages::COPY_SRC | TextureUsages::COPY_DST | TextureUsages::TEXTURE_BINDING] for ETC2 formats. Features::TEXTURE_ADAPTER_SPECIFIC_FORMAT_FEATURES may enable additional usages.

Supported Platforms:

  • Intel/Vulkan
  • Mobile (some)

This is a native-only feature.

Enables ASTC family of compressed textures. ASTC textures use pixel blocks varying from 4x4 to 12x12. Blocks are always 16 bytes.

Compressed textures sacrifice some quality in exchange for significantly reduced bandwidth usage.

Support for this feature guarantees availability of [TextureUsages::COPY_SRC | TextureUsages::COPY_DST | TextureUsages::TEXTURE_BINDING] for ASTC formats. Features::TEXTURE_ADAPTER_SPECIFIC_FORMAT_FEATURES may enable additional usages.

Supported Platforms:

  • Intel/Vulkan
  • Mobile (some)

This is a native-only feature.

Enables device specific texture format features.

See TextureFormatFeatures for a listing of the features in question.

By default only texture format properties as defined by the WebGPU specification are allowed. Enabling this feature flag extends the features of each format to the ones supported by the current device. Note that without this flag, read/write storage access is not allowed at all.

This extension does not enable additional formats.

This is a native-only feature.

Enables 64-bit floating point types in SPIR-V shaders.

Note: even when supported by GPU hardware, 64-bit floating point operations are frequently between 16 and 64 times slower than equivalent operations on 32-bit floats.

Supported Platforms:

  • Vulkan

This is a native-only feature.

Enables using 64-bit types for vertex attributes.

Requires SHADER_FLOAT64.

Supported Platforms: N/A

This is a native-only feature.

Allows the user to set a overestimation-conservative-rasterization in PrimitiveState::conservative

Processing of degenerate triangles/lines is hardware specific. Only triangles are supported.

Supported platforms:

  • Vulkan

This is a native only feature.

Enables bindings of writable storage buffers and textures visible to vertex shaders.

Note: some (tiled-based) platforms do not support vertex shaders with any side-effects.

Supported Platforms:

  • All

This is a native-only feature.

Enables clear to zero for buffers & textures.

Supported platforms:

  • All

This is a native only feature.

Enables creating shader modules from SPIR-V binary data (unsafe).

SPIR-V data is not parsed or interpreted in any way; you can use [wgpu::make_spirv_raw!] to check for alignment and magic number when converting from raw bytes.

Supported platforms:

  • Vulkan, in case shader’s requested capabilities and extensions agree with Vulkan implementation.

This is a native only feature.

Enables builtin(primitive_index) in fragment shaders.

Note: enables geometry processing for pipelines using the builtin. This may come with a significant performance impact on some hardware. Other pipelines are not affected.

Supported platforms:

  • Vulkan

This is a native only feature.

Returns an empty set of flags.

Returns the set containing all flags.

Returns the raw value of the flags currently stored.

Convert from underlying bit representation, unless that representation contains bits that do not correspond to a flag.

Convert from underlying bit representation, dropping any bits that do not correspond to flags.

Convert from underlying bit representation, preserving all bits (even those not corresponding to a defined flag).

Safety

The caller of the bitflags! macro can chose to allow or disallow extra bits for their bitflags type.

The caller of from_bits_unchecked() has to ensure that all bits correspond to a defined flag or that extra bits are valid for this bitflags type.

Returns true if no flags are currently stored.

Returns true if all flags are currently set.

Returns true if there are flags common to both self and other.

Returns true if all of the flags in other are contained within self.

Inserts the specified flags in-place.

Removes the specified flags in-place.

Toggles the specified flags in-place.

Inserts or removes the specified flags depending on the passed value.

Returns the intersection between the flags in self and other.

Specifically, the returned set contains only the flags which are present in both self and other.

This is equivalent to using the & operator (e.g. ops::BitAnd), as in flags & other.

Returns the union of between the flags in self and other.

Specifically, the returned set contains all flags which are present in either self or other, including any which are present in both (see Self::symmetric_difference if that is undesirable).

This is equivalent to using the | operator (e.g. ops::BitOr), as in flags | other.

Returns the difference between the flags in self and other.

Specifically, the returned set contains all flags present in self, except for the ones present in other.

It is also conceptually equivalent to the “bit-clear” operation: flags & !other (and this syntax is also supported).

This is equivalent to using the - operator (e.g. ops::Sub), as in flags - other.

Returns the symmetric difference between the flags in self and other.

Specifically, the returned set contains the flags present which are present in self or other, but that are not present in both. Equivalently, it contains the flags present in exactly one of the sets self and other.

This is equivalent to using the ^ operator (e.g. ops::BitXor), as in flags ^ other.

Returns the complement of this set of flags.

Specifically, the returned set contains all the flags which are not set in self, but which are allowed for this type.

Alternatively, it can be thought of as the set difference between Self::all() and self (e.g. Self::all() - self)

This is equivalent to using the ! operator (e.g. ops::Not), as in !flags.

Trait Implementations

Formats the value using the given formatter.

Returns the intersection between the two sets of flags.

The resulting type after applying the & operator.

Disables all flags disabled in the set.

Returns the union of the two sets of flags.

The resulting type after applying the | operator.

Adds the set of flags.

Returns the left flags, but with all the right flags toggled.

The resulting type after applying the ^ operator.

Toggles the set of flags.

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Returns the “default value” for a type. Read more

Extends a collection with the contents of an iterator. Read more

🔬 This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

🔬 This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements. Read more

Creates a value from an iterator. Read more

Feeds this value into the given Hasher. Read more

Feeds a slice of this type into the given Hasher. Read more

Formats the value using the given formatter.

Returns the complement of this set of flags.

The resulting type after applying the ! operator.

Formats the value using the given formatter.

This method returns an Ordering between self and other. Read more

Compares and returns the maximum of two values. Read more

Compares and returns the minimum of two values. Read more

Restrict a value to a certain interval. Read more

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

Returns the set difference of the two sets of flags.

The resulting type after applying the - operator.

Disables all flags enabled in the set.

Formats the value using the given formatter.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Compare self to key and return true if they are equal.

Performs the conversion.

Performs the conversion.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.