Charlie

### Boo **Boo** is a cross-platform windowing and event manager similar to SDL or SFML, with additional 3D rendering functionality. The primary focus of Boo is 2D/3D rendering using polygon-rasterization APIs like OpenGL or Direct3D. It exposes a unified command-queue API for calling the underlying graphics API. The only per-platform responsibility of the client code is providing the shaders' source. Drawing, resource-management and state-switching are performed using the unified API; these may be written once for all platforms. Boo also features a unified audio API for mixing voices and performing variable sample-rate-conversion. All audio computation occurs on the CPU, 'pumped' by the client each frame-iteration. Client code is entered via the `appMain` method supplied in a callback object. This code executes on a dedicated thread with graphics command context available. The API may be used to synchronize loops on the client thread with the display refresh-rate. #### Supported Graphics Backends * OpenGL 3.3+ * Direct3D 11/12 * Metal 1.1 (OS X 10.11 only for now, iOS coming soon) * **[Coming soon]** OpenGL ES 3.0 * **[Coming soon]** Vulkan #### Supported Audio Backends * **[Windows]** WASAPI * **[OS X]** Audio Queue Services * **[Linux]** ALSA