Abstract: A method, an apparatus and a system for graphics rendering based on a Web Graphics Library (WebGL) are provided. The method includes that: initial rendering information is acquired; the initial rendering information is converted according to a preset layer encapsulation format to obtain layer rendering data; the layer rendering data is mapped into a WebGL data format to obtain WebGL rendering data; and a WebGL interface is invoked and rendering output is performed according to the WebGL rendering data. According to the method, an element drawn by the WebGL is encapsulated into a layer, the layer rendering data is acquired in a form of preset layer encapsulation format, and then the layer rendering data is mapped into the WebGL data format, so that the underlying drawing ability is opened to a web application layer.

Abstract: A double-screen tablet computer for students comprises a tablet computer body, a liquid crystal screen assembly and an ink screen assembly, wherein the liquid crystal screen assembly and the ink screen assembly are disposed on a front side and a back side of the tablet computer body respectively and are electrically connected to the tablet computer body. The back side provided with the ink screen assembly has a heat-dissipation region. The two sides of the tablet computer can fulfill different display functions to adapt to more application scenarios, and the tablet computer has a good heat-dissipation effect.