Image to ICNS Converter

Convert PNG and JPEG images into macOS .icns icon files easily. Built on Windows, designed with cross-platform support in mind.

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✨ Features

• Converts PNG and JPEG images to ICNS format
• Supports all macOS icon sizes (16x16 up to 1024x1024)
• Preserves transparency (alpha channel)
• Uses GDI+ on Windows for image decoding
• Outputs debug-resized images for verification

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🛠️ Usage

imagetoicns.exe input.png output.icns
imagetoicns.exe input.jpg output.icns

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⚙️ Build Instructions

The project now uses CMake for build configuration.

Windows (Visual Studio):

cmake -S . -B build -G "Visual Studio 17 2022"
cmake --build build --config Release

Requires:

• Visual Studio 2019 or later
• GDI+ (included with Windows)

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📁 Debug Output

• During processing, resized PNGs are saved to a debug_output/ folder for inspection.

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🔭 Future Plans

• Cross-platform support (Linux/macOS builds)
• Replace GDI+ with a cross-platform image library (e.g., libpng or stb_image)
• Optional GUI frontend using Qt or ImGui

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🤝 Contributing

Pull requests welcome! Especially if you're interested in:

• Making the image loader cross-platform
• Adding CI builds for Linux/macOS
• Improving ICNS compatibility or compression

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📄 License

MIT (Non-Commercial): Free for open source and personal use.