macfrag

A native macOS Metal Shading Language (MSL) playground/editor, written in Swift/SwiftUI.

It's a split-pane app: an MSL code editor on the left (with neon syntax highlighting via the MacfragNeonTheme/MacfragTextDefaultsPlugin/MacfragAppearancePlugin plugins on MSLCodeEditor.swift) and a live Metal shader preview on the right (MetalShaderPreview.swift) that compiles the source and renders the fragment shader, with a build log panel underneath the editor.

Status

Early/work-in-progress:

• Editor is rough.
• Debug/build-log pane is rough.
• File save works.
• Syntax highlighting only paints characters as you type (and only the affected characters).

Requirements

• macOS with Metal support
• Xcode

Build & run

Open macfrag.xcodeproj in Xcode and run the macfrag scheme.

Project layout

• macfrag/macfragApp.swift — app entry point
• macfrag/ContentView.swift — split-pane root view, ships a default MSL fragment shader
• macfrag/MSLCodeEditor.swift — MSL source editor
• macfrag/MetalShaderPreview.swift — live Metal compile + render preview
• macfrag/MacfragNeonTheme.swift — neon syntax highlighting theme
• macfrag/MacfragAppearancePlugin.swift, MacfragTextDefaultsPlugin.swift — editor plugins
• macfrag/MacfragTextView.swift — underlying text view
• macfragTests/, macfragUITests/ — test targets