chore(deps): update rust crate wgpu to 0.20

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
wgpu (source)	dev-dependencies	minor	0.19 -> 0.20

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Release Notes

gfx-rs/wgpu (wgpu)

v0.20.0

Compare Source

Major Changes

Pipeline overridable constants

Wgpu supports now pipeline-overridable constants

This allows you to define constants in wgsl like this:

override some_factor: f32 = 42.1337; // Specifies a default of 42.1337 if it's not set.

And then set them at runtime like so on your pipeline consuming this shader:

// ...
fragment: Some(wgpu::FragmentState {
    compilation_options: wgpu::PipelineCompilationOptions {
        constants: &[("some_factor".to_owned(), 0.1234)].into(), // Sets `some_factor` to 0.1234.
        ..Default::default()
    },
    // ...
}),
// ...

By @​teoxoy & @​jimblandy in #​5500

Changed feature requirements for timestamps

Due to a specification change write_timestamp is no longer supported on WebGPU.
wgpu::CommandEncoder::write_timestamp requires now the new wgpu::Features::TIMESTAMP_QUERY_INSIDE_ENCODERS feature which is available on all native backends but not on WebGPU.

By @​wumpf in #​5188

Wgsl const evaluation for many more built-ins

Many numeric built-ins have had a constant evaluation implementation added for them, which allows them to be used in a const context:

abs, acos, acosh, asin, asinh, atan, atanh, cos, cosh, round, saturate, sin, sinh, sqrt, step, tan, tanh, ceil, countLeadingZeros, countOneBits, countTrailingZeros, degrees, exp, exp2, floor, fract, fma, inverseSqrt, log, log2, max, min, radians, reverseBits, sign, trunc

By @​ErichDonGubler in #​4879, #​5098

New native-only wgsl features

Subgroup operations

The following subgroup operations are available in wgsl now:

subgroupBallot, subgroupAll, subgroupAny, subgroupAdd, subgroupMul, subgroupMin, subgroupMax, subgroupAnd, subgroupOr, subgroupXor, subgroupExclusiveAdd, subgroupExclusiveMul, subgroupInclusiveAdd, subgroupInclusiveMul, subgroupBroadcastFirst, subgroupBroadcast, subgroupShuffle, subgroupShuffleDown, subgroupShuffleUp, subgroupShuffleXor

Availability is governed by the following feature flags:

• wgpu::Features::SUBGROUP for all operations except subgroupBarrier in fragment & compute, supported on Vulkan, DX12 and Metal.
• wgpu::Features::SUBGROUP_VERTEX, for all operations except subgroupBarrier general operations in vertex shaders, supported on Vulkan
• wgpu::Features::SUBGROUP_BARRIER, for support of the subgroupBarrier operation, supported on Vulkan & Metal

Note that there currently some differences between wgpu's native-only implementation and the open WebGPU proposal.

By @​exrook and @​lichtso in #​5301

Signed and unsigned 64 bit integer support in shaders.

wgpu::Features::SHADER_INT64 enables 64 bit integer signed and unsigned integer variables in wgsl (i64 and u64 respectively).
Supported on Vulkan, DX12 (requires DXC) and Metal (with MSL 2.3+ support).

By @​atlv24 and @​cwfitzgerald in #​5154

New features

General

• Implemented the Unorm10_10_10_2 VertexFormat by @​McMackety in #​5477
• wgpu-types's trace and replay features have been replaced by the serde feature. By @​KirmesBude in #​5149
• wgpu-core's serial-pass feature has been removed. Use serde instead. By @​KirmesBude in #​5149
• Added InstanceFlags::GPU_BASED_VALIDATION, which enables GPU-based validation for shaders. This is currently only supported on the DX12 and Vulkan backends; other platforms ignore this flag, for now. By @​ErichDonGubler in #​5146, #​5046.
  • When set, this flag implies InstanceFlags::VALIDATION.
  • This has been added to the set of flags set by InstanceFlags::advanced_debugging. Since the overhead is potentially very large, the flag is not enabled by default in debug builds when using InstanceFlags::from_build_config.
  • As with other instance flags, this flag can be changed in calls to InstanceFlags::with_env with the new WGPU_GPU_BASED_VALIDATION environment variable.
• wgpu::Instance can now report which wgpu::Backends are available based on the build configuration. By @​wumpf #​5167

  -wgpu::Instance::any_backend_feature_enabled()
  +!wgpu::Instance::enabled_backend_features().is_empty()

• Breaking change: wgpu_core::pipeline::ProgrammableStageDescriptor is now optional. By @​ErichDonGubler in #​5305.
• Features::downlevel{_webgl2,}_features was made const by @​MultisampledNight in #​5343
• Breaking change: wgpu_core::pipeline::ShaderError has been moved to naga. By @​stefnotch in #​5410
• More as_hal methods and improvements by @​JMS55 in #​5452
  • Added wgpu::CommandEncoder::as_hal_mut
  • Added wgpu::TextureView::as_hal
  • wgpu::Texture::as_hal now returns a user-defined type to match the other as_hal functions

Naga

• Allow user to select which MSL version to use via --metal-version with Naga CLI. By @​pcleavelin in #​5392
• Support arrayLength for runtime-sized arrays inside binding arrays (for WGSL input and SPIR-V output). By @​kvark in #​5428
• Added --shader-stage and --input-kind options to naga-cli for specifying vertex/fragment/compute shaders, and frontend. by @​ratmice in #​5411
• Added a create_validator function to wgpu_core Device to create naga Validators. By @​atlv24 #​5606

WebGPU

• Implement the device_set_device_lost_callback method for ContextWebGpu. By @​suti in #​5438
• Add support for storage texture access modes ReadOnly and ReadWrite. By @​JolifantoBambla in #​5434

GLES / OpenGL

• Log an error when GLES texture format heuristics fail. By @​PolyMeilex in #​5266
• Cache the sample count to keep get_texture_format_features cheap. By @​Dinnerbone in #​5346
• Mark DEPTH32FLOAT_STENCIL8 as supported in GLES. By @​Dinnerbone in #​5370
• Desktop GL now also supports TEXTURE_COMPRESSION_ETC2. By @​Valaphee in #​5568
• Don't create a program for shader-clearing if that workaround isn't required. By @​Dinnerbone in #​5348.
• OpenGL will now be preferred over OpenGL ES on EGL, making it consistent with WGL. By @​valaphee in #​5482
• Fill out driver and driver_info, with the OpenGL flavor and version, similar to Vulkan. By @​valaphee in #​5482

Metal

• Metal 3.0 and 3.1 detection. By @​atlv24 in #​5497

DX12

• Shader Model 6.1-6.7 detection. By @​atlv24 in #​5498

Other performance improvements

• Simplify and speed up the allocation of internal IDs. By @​nical in #​5229
• Use memory pooling for UsageScopes to avoid frequent large allocations. by @​robtfm in #​5414
• Eager release of GPU resources comes from device.trackers. By @​bradwerth in #​5075
• Support disabling zero-initialization of workgroup local memory in compute shaders. By @​DJMcNab in #​5508

Documentation

• Improved wgpu_hal documentation. By @​jimblandy in #​5516, #​5524, #​5562, #​5563, #​5566, #​5617, #​5618
• Add mention of primitive restart in the description of PrimitiveState::strip_index_format. By @​cpsdqs in #​5350
• Document and tweak precise behaviour of SourceLocation. By @​stefnotch in #​5386 and #​5410
• Give short example of WGSL push_constant syntax. By @​waywardmonkeys in #​5393
• Fix incorrect documentation of Limits::max_compute_workgroup_storage_size default value. By @​atlv24 in #​5601

Bug Fixes

General

• Fix serde feature not compiling for wgpu-types. By @​KirmesBude in #​5149
• Fix the validation of vertex and index ranges. By @​nical in #​5144 and #​5156
• Fix panic when creating a surface while no backend is available. By @​wumpf #​5166
• Correctly compute minimum buffer size for array-typed storage and uniform vars. By @​jimblandy #​5222
• Fix timeout when presenting a surface where no work has been done. By @​waywardmonkeys in #​5200
• Fix registry leaks with de-duplicated resources. By @​nical in #​5244
• Fix linking when targeting android. By @​ashdnazg in #​5326.
• Failing to set the device lost closure will call the closure before returning. By @​bradwerth in #​5358.
• Fix deadlocks caused by recursive read-write lock acquisitions #​5426.
• Remove exposed C symbols (extern "C" + [no_mangle]) from RenderPass & ComputePass recording. By @​wumpf in #​5409.
• Fix surfaces being only compatible with first backend enabled on an instance, causing failures when manually specifying an adapter. By @​Wumpf in #​5535.

Naga

• In spv-in, remove unnecessary "gl_PerVertex" name check so unused builtins will always be skipped. Prevents validation errors caused by capability requirements of these builtins #​4915. By @​Imberflur in #​5227.
• In spv-out, check for acceleration and ray-query types when enabling ray-query extension to prevent validation error. By @​Vecvec in #​5463
• Add a limit for curly brace nesting in WGSL parsing, plus a note about stack size requirements. By @​ErichDonGubler in #​5447.
• In hlsl-out, fix accesses on zero value expressions by generating helper functions for Expression::ZeroValue. By @​Imberflur in #​5587.
• Fix behavior of extractBits and insertBits when offset + count overflows the bit width. By @​cwfitzgerald in #​5305
• Fix behavior of integer clamp when min argument > max argument. By @​cwfitzgerald in #​5300.
• Fix TypeInner::scalar_width to be consistent with the rest of the codebase and return values in bytes not bits. By @​atlv24 in #​5532.

GLES / OpenGL

• GLSL 410 does not support layout(binding = ...), enable only for GLSL 420. By @​bes in #​5357
• Fixes for being able to use an OpenGL 4.1 core context provided by macOS with wgpu. By @​bes in #​5331.
• Fix crash when holding multiple devices on wayland/surfaceless. By @​ashdnazg in #​5351.
• Fix first_instance getting ignored in draw indexed when ARB_shader_draw_parameters feature is present and base_vertex is 0. By @​valaphee in #​5482

Vulkan

• Set object labels when the DEBUG flag is set, even if the VALIDATION flag is disabled. By @​DJMcNab in #​5345.
• Add safety check to wgpu_hal::vulkan::CommandEncoder to make sure discard_encoding is not called in the closed state. By @​villuna in #​5557
• Fix SPIR-V type capability requests to not depend on LocalType caching. By @​atlv24 in #​5590

Tests

• Fix intermittent crashes on Linux in the multithreaded_compute test. By @​jimblandy in #​5129.
• Refactor tests to read feature flags by name instead of a hardcoded hexadecimal u64. By @​atlv24 in #​5155.
• Add test that verifies that we can drop the queue before using the device to create a command encoder. By @​Davidster in #​5211

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