WoW:GxApi

GxApi is a cross-platform graphics API that is part of the World of Warcraft engine. It:

• Creates/destroys the window in which the game runs, which starts the game being able to read input events

• Loads/unloads texture and geometry data

• Creates/destroys textures

• Draws to the window

Graphics device

GxApi supports multiple low-level graphics APIs such as OpenGL and Direct3D (DirectX) 9. It does this by wrapping an base interface class, CGxDevice, whose virtual member functions handle the actual calls to the graphics driver.

Windows device

On Windows, the derived classes include:

CGxDeviceOpenGl

OpenGL implementation. Enabled by passing -opengl as a command-line argument, or by setting a CVar prior to launch: SET gxApi "OpenGL"

CGxDeviceD3d

Direct3D 9 (DirectX) implementation. Enabled by passing -d3d as a command-line argument, or by setting a CVar prior to launch: SET gxApi "D3D9"

CGxDeviceD3d9Ex

Direct3D 9Ex (DirectX) implementation. Enabled by passing -d3d9ex as a command-line argument, or by setting a CVar prior to launch: SET gxApi "D3D9Ex"