Sourced from naga's releases.

v27.0.0

Major Changes

Deferred command buffer actions: map_buffer_on_submit and on_submitted_work_done

You may schedule buffer mapping and a submission-complete callback to run automatically after you submit, directly from encoders, command buffers, and passes.

// Record some GPU work so the submission isn't empty and touches `buffer`.
encoder.clear_buffer(&buffer, 0, None);
// Defer mapping until this encoder is submitted.
encoder.map_buffer_on_submit(&buffer, wgpu::MapMode::Read, 0..size, |result| { .. });
// Fires after the command buffer's work is finished.
encoder.on_submitted_work_done(|| { .. });
// Automatically calls map_async and on_submitted_work_done after this submission finishes.
queue.submit([encoder.finish()]);

Available on CommandEncoder, CommandBuffer, RenderPass, and ComputePass.

By @​cwfitzgerald in #8125.

Builtin Support for DXGI swapchains on top of of DirectComposition Visuals in DX12

By enabling DirectComposition support, the dx12 backend can now support transparent windows.

This creates a single IDCompositionVisual over the entire window that is used by the mfSurface. If a user wants to manage the composition tree themselves, they should create their own device and composition, and pass the relevant visual down into wgpu via SurfaceTargetUnsafe::CompositionVisual.

let instance = wgpu::Instance::new(&wgpu::InstanceDescriptor {
    backend_options: wgpu::BackendOptions {
        dx12: wgpu::Dx12BackendOptions {
            presentation_system: wgpu::Dx12SwapchainKind::DxgiFromVisual,
            ..
        },
        ..
    },
    ..
});

By @​n1ght-hunter in #7550.

EXPERIMENTAL_RAY_TRACING_ACCELERATION_STRUCTURE has been merged into EXPERIMENTAL_RAY_QUERY

We have merged the acceleration structure feature into the RayQuery feature. This is to help work around an AMD driver bug and reduce the feature complexity of ray tracing. In the future when ray tracing pipelines are implemented, if either feature is enabled, acceleration structures will be available.

... (truncated)

Sourced from naga's changelog.

v27.0.0 (2025-10-01)

Major Changes

Deferred command buffer actions: map_buffer_on_submit and on_submitted_work_done

You may schedule buffer mapping and a submission-complete callback to run automatically after you submit, directly from encoders, command buffers, and passes.

// Record some GPU work so the submission isn't empty and touches `buffer`.
encoder.clear_buffer(&buffer, 0, None);
// Defer mapping until this encoder is submitted.
encoder.map_buffer_on_submit(&buffer, wgpu::MapMode::Read, 0..size, |result| { .. });
// Fires after the command buffer's work is finished.
encoder.on_submitted_work_done(|| { .. });
// Automatically calls map_async and on_submitted_work_done after this submission finishes.
queue.submit([encoder.finish()]);

Available on CommandEncoder, CommandBuffer, RenderPass, and ComputePass.

By @​cwfitzgerald in #8125.

Builtin Support for DXGI swapchains on top of of DirectComposition Visuals in DX12

By enabling DirectComposition support, the dx12 backend can now support transparent windows.

This creates a single IDCompositionVisual over the entire window that is used by the mfSurface. If a user wants to manage the composition tree themselves, they should create their own device and composition, and pass the relevant visual down into wgpu via SurfaceTargetUnsafe::CompositionVisual.

let instance = wgpu::Instance::new(&wgpu::InstanceDescriptor {
    backend_options: wgpu::BackendOptions {
        dx12: wgpu::Dx12BackendOptions {
            presentation_system: wgpu::Dx12SwapchainKind::DxgiFromVisual,
            ..
        },
        ..
    },
    ..
});

By @​n1ght-hunter in #7550.

EXPERIMENTAL_RAY_TRACING_ACCELERATION_STRUCTURE has been merged into EXPERIMENTAL_RAY_QUERY

We have merged the acceleration structure feature into the RayQuery feature. This is to help work around an AMD driver bug and reduce the feature complexity of ray tracing. In the future when ray tracing pipelines are implemented, if either feature is enabled, acceleration structures will be available.

... (truncated)

• 482a983 Release v27 (#8287)
• 9380b87 chore(deps): update cargo.lock (#8229)
• 333f811 Rework wgpu::PollType to only two enum variants (#8285)
• 43eccd2 [naga] Remove naga::path_like. Use String instead. (#8284)
• 5b194ec [deno] Remove kludge for type properties (#8262)
• a2547f8 chore(deps): update dependency macos to v15 (#8278)
• 5146b3f fix(namer): normalize ":<>," characters to a snake case separator
• 9070215 fix(namer): escape, rather than strip, non-ASCII ident. characters
• 00ea850 Allow timeouting on poll (#8282)
• 06fc6f7 feat(wgsl): recognize enable primitive-index; (#8237)
• Additional commits viewable in compare view

Sourced from wgpu's changelog.

v27.0.1 (2025-10-02)

Bug Fixes

• Fixed the build on docs.rs. By @​cwfitzgerald in #8292.

v27.0.0 (2025-10-01)

Major Changes

Deferred command buffer actions: map_buffer_on_submit and on_submitted_work_done

You may schedule buffer mapping and a submission-complete callback to run automatically after you submit, directly from encoders, command buffers, and passes.

// Record some GPU work so the submission isn't empty and touches `buffer`.
encoder.clear_buffer(&buffer, 0, None);
// Defer mapping until this encoder is submitted.
encoder.map_buffer_on_submit(&buffer, wgpu::MapMode::Read, 0..size, |result| { .. });
// Fires after the command buffer's work is finished.
encoder.on_submitted_work_done(|| { .. });
// Automatically calls map_async and on_submitted_work_done after this submission finishes.
queue.submit([encoder.finish()]);

Available on CommandEncoder, CommandBuffer, RenderPass, and ComputePass.

By @​cwfitzgerald in #8125.

Builtin Support for DXGI swapchains on top of of DirectComposition Visuals in DX12

By enabling DirectComposition support, the dx12 backend can now support transparent windows.

This creates a single IDCompositionVisual over the entire window that is used by the mfSurface. If a user wants to manage the composition tree themselves, they should create their own device and composition, and pass the relevant visual down into wgpu via SurfaceTargetUnsafe::CompositionVisual.

let instance = wgpu::Instance::new(&wgpu::InstanceDescriptor {
    backend_options: wgpu::BackendOptions {
        dx12: wgpu::Dx12BackendOptions {
            presentation_system: wgpu::Dx12SwapchainKind::DxgiFromVisual,
            ..
        },
        ..
    },
    ..
});

... (truncated)

• c76dea0 Bump version to v27.0.1
• d3f487e Clarify changelog
• 0df9350 Fix docs.rs build
• 7b98896 Remove trunk example warning
• 482a983 Release v27 (#8287)
• 9380b87 chore(deps): update cargo.lock (#8229)
• 333f811 Rework wgpu::PollType to only two enum variants (#8285)
• 43eccd2 [naga] Remove naga::path_like. Use String instead. (#8284)
• 5b194ec [deno] Remove kludge for type properties (#8262)
• a2547f8 chore(deps): update dependency macos to v15 (#8278)
• Additional commits viewable in compare view

• bf5604b Release egui_kittest 0.33.1
• c79096e Add egui_kittest::Harness::set_options (#7638)
• 96470fa Release 0.33.0 - egui::Plugin, better kerning, kitdiff viewer (#7622)
• 92de16a Fix kerning snapshot test directory
• d50287b Add taplo.toml for toml formatting (#7618)
• 82b6b3c Tweak Rust Analyzer settings (#7617)
• 0abecce Change Spinner widget to account for width as well as height (#7560)
• da39198 Some minor docs improvements (#7614)
• cfca7eb Fix black flash on start in glow eframe backend (#7616)
• d1fcd74 Include screenshot in popups README (#7562)
• Additional commits viewable in compare view

• bf5604b Release egui_kittest 0.33.1
• c79096e Add egui_kittest::Harness::set_options (#7638)
• 96470fa Release 0.33.0 - egui::Plugin, better kerning, kitdiff viewer (#7622)
• 92de16a Fix kerning snapshot test directory
• d50287b Add taplo.toml for toml formatting (#7618)
• 82b6b3c Tweak Rust Analyzer settings (#7617)
• 0abecce Change Spinner widget to account for width as well as height (#7560)
• da39198 Some minor docs improvements (#7614)
• cfca7eb Fix black flash on start in glow eframe backend (#7616)
• d1fcd74 Include screenshot in popups README (#7562)
• Additional commits viewable in compare view

• bf5604b Release egui_kittest 0.33.1
• c79096e Add egui_kittest::Harness::set_options (#7638)
• 96470fa Release 0.33.0 - egui::Plugin, better kerning, kitdiff viewer (#7622)
• 92de16a Fix kerning snapshot test directory
• d50287b Add taplo.toml for toml formatting (#7618)
• 82b6b3c Tweak Rust Analyzer settings (#7617)
• 0abecce Change Spinner widget to account for width as well as height (#7560)
• da39198 Some minor docs improvements (#7614)
• cfca7eb Fix black flash on start in glow eframe backend (#7616)
• d1fcd74 Include screenshot in popups README (#7562)
• Additional commits viewable in compare view

• bf5604b Release egui_kittest 0.33.1
• c79096e Add egui_kittest::Harness::set_options (#7638)
• 96470fa Release 0.33.0 - egui::Plugin, better kerning, kitdiff viewer (#7622)
• 92de16a Fix kerning snapshot test directory
• d50287b Add taplo.toml for toml formatting (#7618)
• 82b6b3c Tweak Rust Analyzer settings (#7617)
• 0abecce Change Spinner widget to account for width as well as height (#7560)
• da39198 Some minor docs improvements (#7614)
• cfca7eb Fix black flash on start in glow eframe backend (#7616)
• d1fcd74 Include screenshot in popups README (#7562)
• Additional commits viewable in compare view

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