The coordinate system, for 2-d graphics, is shown in Figure 2.
2 - D图形的坐标系如图2所示。
Download Cairo, which is a 2-d graphics library with support for multiple output devices.
下载Cairo，这是支持多输出设备的2 - d图形库。
Android addresses the graphics challenge with built-in support for 2-d and 3-d graphics, including the OpenGL library.
Android通过提供对2d和3d图形的内置支持，包括opengl库，解决了图形方面的挑战。
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