mirror of https://github.com/AxioDL/boo.git
50 lines
2.0 KiB
Markdown
50 lines
2.0 KiB
Markdown
<p align="center">
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<a href="http://axiodl.github.io/boo/mascot_big.png">
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<img src="http://axiodl.github.io/boo/mascot.png" alt="Boo Mascot" width="256" height="256"/><br><em>Charlie</em>
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</a>
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</p>
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### Boo
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**Boo** is a cross-platform windowing and event manager similar to
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SDL or SFML, with additional 3D rendering functionality.
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The primary focus of Boo is 2D/3D rendering using polygon-rasterization
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APIs like OpenGL or Direct3D. It exposes a unified command-queue API for
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calling the underlying graphics API.
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The only per-platform responsibility of the client code is providing the
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shaders' source. Drawing, resource-management and state-switching are
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performed using the unified API; these may be written once for all platforms.
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Boo also features a unified audio API for mixing voices and performing variable
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sample-rate-conversion. All audio computation occurs on the CPU, synchronously 'pumped'
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by the client each frame-iteration.
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Client code is entered via the `appMain` method supplied in a callback object.
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This code executes on a dedicated thread with graphics command context available.
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The API may be used to synchronize loops on the client thread with the display
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refresh-rate.
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#### Supported Graphics Backends
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* OpenGL 3.3+
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* Direct3D 11
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* Metal 1.1 (OS X 10.11 only for now, iOS coming soon)
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* Vulkan
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#### Supported Audio Backends
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* **[Windows]** WASAPI
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* **[OS X]** Audio Queue Services
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* **[Linux]** ALSA
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#### Pro Logic II Encoding Support
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The Boo audio engine supports real-time Pro Logic II surround matrixing for 5.1 client mixes.
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Call `IAudioVoiceEngine::enableLtRt(true);` to enable this functionality.
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**Note:** Before building Boo, the [Intel Integrated Performance Primitives](https://software.intel.com/en-us/intel-ipp)
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must be installed for full surround-sound encoding capabilities. Without this library, only the left, right, and center
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channels will be encoded. The surround channels are phase-shifted 90-degrees using the Hilbert functions in the library.
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