b2dGraphics

Creates a window of resWidth x resHeight and starts the DirectX 12 2D pipeline: back buffer, the depth buffer used by b2dSetDepth, and the primitive/image/text batching. graphicsMode selects the windowing / vsync behaviour (see the BBR_WINDOW_MODE_* constants). This is the first graphics call a program makes - loading fonts and images and every b2d* draw call depend on it. Returns non-zero on success. (On the web target the equivalent call is awaited automatically inside Main().)