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@cwfitzgerald cwfitzgerald released this 28 Apr 22:15
· 1105 commits to trunk since this release
v0.20.0
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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
  • 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

DX12

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

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

Contributors

ratmice, bes, and 31 other contributors
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