Bump wgpu from 29.0.3 to 30.0.0

[dependabot]

Bumps wgpu from 29.0.3 to 30.0.0.

Changelog

Sourced from wgpu's changelog.

v30.0.0 (2026-07-01)

Major changes

Optional vertex buffer slots

This allows gaps in VertexState's buffers and adds support for unbinding vertex buffers, bringing us in compliance with the WebGPU spec. As a result of this, VertexState's buffers field now has type of &[Option<VertexBufferLayout>]. To migrate, wrap vertex buffer layouts in Some:

  let vertex_state = wgpu::VertexState {
      module: &vs_module,
      entry_point: Some("vs_main"),
      compilation_options: wgpu::PipelineCompilationOptions::default(),
      buffers: &[
-         &vertex_buffer_layout
+         Some(&vertex_buffer_layout)
      ],
  };

By @​teoxoy in #9351.

Integer shader I/O no longer defaults to @interpolate(flat)

To align with the shading language specifications, naga no longer assumes that integer-typed shader I/O should have flat interpolation, i.e., should not be interpolated. Even though flat interpolation is the only choice for integer I/O, it must be still specified explicitly.

WGSL:

 struct FragmentInput {
     @location(0) tex_coord: vec2<f32>,
-    @location(1) index: i32,
+    @location(1) @interpolate(flat) index: i32,
 }

GLSL:

-layout(location = 1) in int index;
+layout(location = 1) flat in int index;

By @​andyleiserson in #9321.

Empty buffer slices are now permitted

Creating a BufferSlice with a length of 0 no longer causes a panic.

Empty buffer slices can be:

... (truncated)

Commits

• 8bf3e5f Update to v30 (#9790)
• aa2b790 [core] filter native-only features and limits if
• 2ea3a1d [vulkan] advertise DownlevelFlags::SURFACE_VIEW_FORMATS if `VK_KHR_swapchai...
• 69e66d8 add DENO_WEBGPU_STRICT_COMPLIANCE and set it for the CTS job
• 995ee7b add Limits::max_buffers_and_acceleration_structures_per_shader_stage
• 0853e7b fix: gate on static_dxc not static-dxc (#9785)
• 979ab2b [core] IDed encoders needs to be dropped (#9782)
• 0cc48c8 fix(core): Track initialization status of 3D textures (#9765)
• a353ba9 Fix signed % wrong for negative operands on NVIDIA (OpSRem poison without mai...
• 7877b76 [core] Move begin_*_pass to CommandEncoder and do only ID resolve in glob...
• Additional commits viewable in compare view

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[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (2 files)

• room/Cargo.toml - wgpu version bump from 29 to 30
• Cargo.lock - transitive dependency updates for wgpu 30 ecosystem

Notes

This is a clean semver-major dependency bump from wgpu 29.0.3 to 30.0.0. The existing source code in room/src/gpu.rs appears compatible with the documented wgpu 30 breaking changes:

• VertexState.buffers uses &[] (empty slice), which is compatible with the new &[Option<&VertexBufferLayout>] type.
• The embedded WGSL shader does not use integer shader I/O, so the @interpolate(flat) default removal is not applicable.
• No empty buffer slice creation that would have relied on pre-v30 panic behavior.

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_{Reviewed by kimi-k2.6-20260420 · Input: 122.6K · Output: 8.9K · Cached: 441.4K}