internal/graphicsdriver/directx: bug fix: Go 1.22 + 32bit Windows + D…

…irectX 12 didn't work well

Apparently, a pseudo padding was needed for D3D12_RESOURCE_DESC,
but this is still mysterious.

This change also add Go 1.22 to the GitHub Actions.

Closes #2867

.github/workflows/test.yml

@@ -7,7 +7,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        go: ['1.18.x', '1.19.x', '1.20.x', '1.21.x']
+        go: ['1.18.x', '1.19.x', '1.20.x', '1.21.x', '1.22.0-rc.2']
     name: Test with Go ${{ matrix.go }} on ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     env:

internal/graphicsdriver/directx/api_32bit_windows.go

@@ -40,6 +40,10 @@ type _D3D12_RESOURCE_DESC struct {
 	SampleDesc       _DXGI_SAMPLE_DESC
 	Layout           _D3D12_TEXTURE_LAYOUT
 	Flags            _D3D12_RESOURCE_FLAGS
+
+	// This is a pseudo padding which D3D12_RESOURCE_DESC1 would use.
+	// Mysteriously, some functions don't work correctly without this hack (#2867).
+	_ [12]byte
 }
 
 type _D3D12_ROOT_PARAMETER struct {