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@cwfitzgerald cwfitzgerald released this 25 Oct 18:15
· 4200 commits to trunk since this release
v0.18.0
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Desktop OpenGL 3.3+ Support on Windows

We now support OpenGL on Windows! This brings support for a vast majority of the hardware that used to be covered by our DX11 backend. As of this writing we support OpenGL 3.3+, though there are efforts to reduce that further.

This allows us to cover the last 12 years of Intel GPUs (starting with Ivy Bridge; aka 3xxx), and the last 16 years of AMD (starting with Terascale; aka HD 2000) / NVidia GPUs (starting with Tesla; aka GeForce 8xxx).

By @Zoxc in #4248

Timestamp Queries Supported on Metal and OpenGL

Timestamp queries are now supported on both Metal and Desktop OpenGL. On Apple chips on Metal, they only support timestamp queries in command buffers or in the renderpass descriptor,
they do not support them inside a pass.

Metal: By @Wumpf in #4008
OpenGL: By @Zoxc in #4267

Render/Compute Pass Query Writes

Addition of the TimestampWrites type to compute and render pass descriptors to allow profiling on tilers which do not support timestamps inside passes.

Added an example to demonstrate the various kinds of timestamps.

Additionally, metal now supports timestamp queries!

By @FL33TW00D & @Wumpf in #3636.

Occlusion Queries

We now support binary occlusion queries! This allows you to determine if any of the draw calls within the query drew any pixels.

Use the new occlusion_query_set field on RenderPassDescriptor to give a query set that occlusion queries will write to.

let mut rpass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
    // ...
+   occlusion_query_set: Some(&my_occlusion_query_set),
});

Within the renderpass do the following to write the occlusion query results to the query set at the given index:

rpass.begin_occlusion_query(index);
rpass.draw(...);
rpass.draw(...);
rpass.end_occlusion_query();

These are binary occlusion queries, so the result will be either 0 or an unspecified non-zero value.

By @valaphee in #3402

Shader Improvements

// WGSL constant expressions are now supported!
const BLAH: u32 = 1u + 1u;

// `rgb10a2uint` and `bgra8unorm` can now be used as a storage image format.
var image: texture_storage_2d<rgb10a2uint, write>;
var image: texture_storage_2d<bgra8unorm, write>;

// You can now use dual source blending!
struct FragmentOutput{
    @location(0) source1: vec4<f32>,
    @location(0) @second_blend_source source2: vec4<f32>,
}

// `modf`/`frexp` now return structures
let result = modf(1.5);
result.fract == 0.5;
result.whole == 1.0;

let result = frexp(1.5);
result.fract == 0.75;
result.exponent == 2i;

// `modf`/`frexp` are currently disabled on GLSL and SPIR-V input.

Shader Validation Improvements

// Cannot get pointer to a workgroup variable
fn func(p: ptr<workgroup, u32>); // ERROR

// Cannot create Inf/NaN through constant expressions
const INF: f32 = 3.40282347e+38 + 1.0; // ERROR
const NAN: f32 = 0.0 / 0.0; // ERROR

// `outerProduct` function removed

// Error on repeated or missing `@workgroup_size()`
@workgroup_size(1) @workgroup_size(2) // ERROR
fn compute_main() {}

// Error on repeated attributes.
fn fragment_main(@location(0) @location(0) location_0: f32) // ERROR

RenderPass StoreOp is now Enumeration

wgpu::Operations::store used to be an underdocumented boolean value,
causing misunderstandings of the effect of setting it to false.

The API now more closely resembles WebGPU which distinguishes between store and discard,
see WebGPU spec on GPUStoreOp.

// ...
depth_ops: Some(wgpu::Operations {
    load: wgpu::LoadOp::Clear(1.0),
-   store: false,
+   store: wgpu::StoreOp::Discard,
}),
// ...

By @Wumpf in #4147

Instance Descriptor Settings

The instance descriptor grew two more fields: flags and gles_minor_version.

flags allow you to toggle the underlying api validation layers, debug information about shaders and objects in capture programs, and the ability to discard lables

gles_minor_version is a rather niche feature that allows you to force the GLES backend to use a specific minor version, this is useful to get ANGLE to enable more than GLES 3.0.

let instance = wgpu::Instance::new(InstanceDescriptor {
    ...
+   flags: wgpu::InstanceFlags::default()
+   gles_minor_version: wgpu::Gles3MinorVersion::Automatic,
});

gles_minor_version: By @PJB3005 in #3998
flags: By @nical in #4230

Many New Examples!

Revamped Testing Suite

Our testing harness was completely revamped and now automatically runs against all gpus in the system, shows the expected status of every test, and is tolerant to flakes.

Additionally, we have filled out our CI to now run the latest versions of WARP and Mesa. This means we can test even more features on CI than before.

By @cwfitzgerald in #3873

The GLES backend is now optional on macOS

The angle feature flag has to be set for the GLES backend to be enabled on Windows & macOS.

By @teoxoy in #4185

Added/New Features

Changes

General

  • Omit texture store bound checks since they are no-ops if out of bounds on all APIs. By @teoxoy in #3975
  • Validate DownlevelFlags::READ_ONLY_DEPTH_STENCIL. By @teoxoy in #4031
  • Add validation in accordance with WebGPU setViewport valid usage for x, y and this.[[attachment_size]]. By @James2022-rgb in #4058
  • wgpu::CreateSurfaceError and wgpu::RequestDeviceError now give details of the failure, but no longer implement PartialEq and cannot be constructed. By @kpreid in #4066 and #4145
  • Make WGPU_POWER_PREF=none a valid value. By @fornwall in 4076
  • Support dual source blending in OpenGL ES, Metal, Vulkan & DX12. By @freqmod in 4022
  • Add stub support for device destroy and device validity. By @bradwerth in 4163 and in 4212
  • Add trace-level logging for most entry points in wgpu-core By @nical in 4183
  • Add Rgb10a2Uint format. By @teoxoy in 4199
  • Validate that resources are used on the right device. By @nical in 4207
  • Expose instance flags.
  • Add support for the bgra8unorm-storage feature. By @jinleili and @nical in #4228
  • Calls to lost devices now return DeviceError::Lost instead of DeviceError::Invalid. By @bradwerth in #4238
  • Let the "strict_asserts" feature enable check that wgpu-core's lock-ordering tokens are unique per thread. By @jimblandy in #4258
  • Allow filtering labels out before they are passed to GPU drivers by @nical in https://github.com/gfx-rs/wgpu/pull/4246

Vulkan

  • Rename wgpu_hal::vulkan::Instance::required_extensions to desired_extensions. By @jimblandy in #4115
  • Don't bother calling vkFreeCommandBuffers when vkDestroyCommandPool will take care of that for us. By @jimblandy in #4059

DX12

Documentation

  • Use WGSL for VertexFormat example types. By @ScanMountGoat in #4035
  • Fix description of Features::TEXTURE_COMPRESSION_ASTC_HDR in #4157

Bug Fixes

General

  • Derive storage bindings via naga::StorageAccess instead of naga::GlobalUse. By @teoxoy in #3985.
  • Queue::on_submitted_work_done callbacks will now always be called after all previous BufferSlice::map_async callbacks, even when there are no active submissions. By @cwfitzgerald in #4036.
  • Fix clear texture views being leaked when wgpu::SurfaceTexture is dropped before it is presented. By @rajveermalviya in #4057.
  • Add Feature::SHADER_UNUSED_VERTEX_OUTPUT to allow unused vertex shader outputs. By @Aaron1011 in #4116.
  • Fix a panic in surface_configure. By @nical in #4220 and #4227

Vulkan

  • Fix enabling wgpu::Features::PARTIALLY_BOUND_BINDING_ARRAY not being actually enabled in vulkan backend. By @39ali in#3772.
  • Don't pass vk::InstanceCreateFlags::ENUMERATE_PORTABILITY_KHR unless the VK_KHR_portability_enumeration extension is available. By @jimblandy in#4038.
  • Enhancement of [#4038], using ash's definition instead of hard-coded c_str. By @hybcloud in#4044.
  • Enable vulkan presentation on (Linux) Intel Mesa >= v21.2. By @flukejones in#4110

DX12

  • DX12 doesn't support `Features::POLYGON_MODE_POINT``. By @teoxoy in #4032.
  • Set Features::VERTEX_WRITABLE_STORAGE based on the right feature level. By @teoxoy in #4033.

Metal

  • Ensure that MTLCommandEncoder calls endEncoding before it is deallocated. By @bradwerth in #4023

WebGPU

GLES

  • enable/disable blending per attachment only when available (on ES 3.2 or higher). By @teoxoy in #4234

Documentation

  • Add an overview of RenderPass and how render state works. By @kpreid in #4055

Examples

  • Created wgpu-example::utils module to contain misc functions and such that are common code but aren't part of the example framework. Add to it the functions output_image_wasm and output_image_native, both for outputting Vec<u8> RGBA images either to the disc or the web page. By @JustAnotherCodemonkey in #3885.
  • Removed capture example as it had issues (did not run on wasm) and has been replaced by render-to-texture (see above). By @JustAnotherCodemonkey in #3885.

Contributors

Zoxc, freqmod, and 24 other contributors
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