What's Changed

Fixed

• Metal Double Present Issue — Removed duplicate [drawable present] call in Queue.Present()
  • presentDrawable: is already scheduled in Submit() before command buffer commit
  • Duplicate present was causing synchronization issues on some Metal drivers

Changed

• Updated dependency: github.com/go-webgpu/goffi v0.3.5 → v0.3.6
  • ARM64 HFA Returns — NSRect (4×float64) now correctly returns all values on Apple Silicon
  • Large Struct Returns — Structs >16 bytes properly use X8 register for implicit pointer
  • Fixes macOS ARM64 blank window — GetSize() no longer returns (0,0) on M1/M2/M3/M4 Macs
  • Resolves gogpu/gogpu#24

Full Changelog: v0.8.5...v0.8.6

What's Changed

Added

• DX12 Backend Registration — DirectX 12 backend now auto-registers on Windows
  • Added hal/dx12/init.go with RegisterBackend() call
  • DX12 backend (~12.7K LOC) now available alongside Vulkan on Windows
  • Windows backend priority: Vulkan → DX12 → GLES → Software

All 5 HAL Backends Complete

Full Changelog: v0.8.4...v0.8.5

Changed

• Updated dependency: github.com/gogpu/naga v0.8.0 → v0.8.1
  • Fixes missing clamp() built-in function in WGSL shader compilation
  • Adds comprehensive math function tests for all 12 WGSL built-in math functions

Documentation

• Made README.md version-agnostic (removed hardcoded version numbers)
• Simplified Roadmap section to link to ROADMAP.md
• Updated CHANGELOG.md and ROADMAP.md for v0.8.4

Full Changelog: v0.8.3...v0.8.4

Summary

Fixes macOS Metal backend blank window issue reported in gogpu/gogpu#24.

Fixed

Metal macOS Blank Window

• Root cause: [drawable present] called separately after command buffer commit
• Fix: Schedule presentDrawable: on command buffer BEFORE commit (Metal requirement)
• Added SetDrawable() method to CommandBuffer for drawable attachment
• Added Drawable() accessor to SurfaceTexture

Metal TextureView NSRange Parameters

• Root cause: newTextureViewWithPixelFormat:textureType:levels:slices: expects NSRange structs
• Fix: Pass NSRange struct pointers instead of raw integers
• Fixed array layer count calculation (was previously ignored)

Installation

go get github.com/gogpu/wgpu@v0.8.3

Full Changelog

v0.8.2...v0.8.3

Changed

• Updated naga v0.6.0 → v0.8.0 (HLSL backend, stability fixes)
• Updated goffi v0.3.3 → v0.3.5

Highlights

DX12 backend now works on Intel GPUs after fixing COM calling convention for struct-returning methods.

Fixed

• DX12 COM Calling Convention Bug — D3D12 methods returning structs require this pointer first, output pointer second

  • Affected: GetCPUDescriptorHandleForHeapStart, GetGPUDescriptorHandleForHeapStart, GetDesc, GetResourceAllocationInfo
  • Reference: D3D12 Struct Return Convention

• Vulkan goffi Argument Passing Bug — Fixes Windows crash (Exception 0xc0000005)

Added

• DX12 Integration Test (cmd/dx12-test) — Validates DX12 backend on Windows
• Compute Shader Support (Phase 2) — Core API: ComputePipeline, ComputePassEncoder
• HAL Compute Infrastructure (Phase 1) — GLES, DX12, Metal compute dispatch

Install

go get github.com/gogpu/wgpu@v0.8.1

Full Changelog: v0.8.0...v0.8.1

DirectX 12 Backend Complete!

All 5 HAL backends are now implemented. ~67K total lines of code.

What's New

• DirectX 12 Backend (~12K LOC)
  • Pure Go COM bindings via syscall (no CGO!)
  • D3D12 API access via COM interface vtables
  • DXGI integration for swapchain and adapter enumeration
  • Descriptor heap management (CBV/SRV/UAV, Sampler, RTV, DSV)
  • Flip model swapchain with tearing support (VRR)
  • Command list recording with resource barriers
  • Root signature and PSO creation
  • Full format conversion (WebGPU to DXGI)

Backend Status

Installation

go get github.com/gogpu/wgpu@v0.8.0

Full Changelog

See CHANGELOG.md for details.

Fixed

• Metal CommandEncoder State Bug — Fixes Issue #24
  • Root cause: isRecording flag was not set in CreateCommandEncoder()
  • Caused BeginRenderPass() to return nil on macOS
  • Fix: Removed boolean flag, use cmdBuffer != 0 as state indicator
  • Follows wgpu-rs pattern where Option<CommandBuffer> presence indicates state
  • Added IsRecording() method for explicit state checking

Changed

• Updated github.com/gogpu/naga dependency from v0.5.0 to v0.6.0

Installation

go get github.com/gogpu/wgpu@v0.7.2

Full Changelog: v0.7.1...v0.7.2

Fixed

• macOS Zero Dimension Crash — Fixes Issue gogpu/gogpu#20
  • Added ErrZeroArea sentinel error matching wgpu-core pattern
  • Validate dimensions in all Surface.Configure() implementations
  • Affected backends: Metal, Vulkan, GLES (Linux/Windows), Software

Notes

• This fix allows proper handling of minimized windows and macOS timing issues
• Window becomes visible asynchronously on macOS; initial dimensions may be 0,0

What's New

Metal Backend

• WGSL→MSL Compilation: Full shader compilation pipeline via naga v0.5.0
  • Parse WGSL source
  • Lower to intermediate representation
  • Compile to Metal Shading Language (MSL)
  • Create MTLLibrary from MSL source
• CreateRenderPipeline: Complete implementation (~120 LOC)
  • Get vertex/fragment functions from library
  • Configure color attachments and blending
  • Create MTLRenderPipelineState

Dependencies

• Added github.com/gogpu/naga v0.5.0

Full Changelog

v0.6.1...v0.7.0