Metal Migration

Porting OpenGL/OpenGL ES or DirectX code to Metal on Apple platforms.

When to Use This Skill

Use this skill when:

• Porting an OpenGL/OpenGL ES codebase to iOS/macOS
• Porting a DirectX codebase to Apple platforms
• Deciding between translation layer (MetalANGLE) vs native rewrite
• Planning a phased migration strategy
• Evaluating effort vs performance tradeoffs

Red Flags

❌ "Just use MetalANGLE and ship" — Translation layers add 10-30% overhead; fine for demos, not production

❌ "Convert shaders one-by-one without planning" — State management differs fundamentally; you'll rewrite twice