IVRExtendedDisplay::GetEyeOutputViewport

void GetEyeOutputViewport( Hmd_Eye eEye, GraphicsAPIConvention eAPIType, uint32_t *pnX, uint32_t *pnY, uint32_t *pnWidth, uint32_t *pnHeight )

Returns the viewport in pixels in display space that the game should render into for the specified eye.

• eEye - Eye_Left or Eye_Right. Determines which eye the function should return the viewport for.
• eAPIType - Modifies the return values to match the conventions of the specified API. One of:
  • API_DirectX
  • `API_OpenGL
• pnX - X position of the eye's viewport within the window
• pnY - Y position of the eye's viewport within the window
• pnWidth - width of the eye's viewport within the window
• pnHeight - height of the eye's viewport within the window