| Functions | |
| int | g2_open_vd (void) | 
| void | g2_attach (int vd_dev, int dev) | 
| void | g2_detach (int vd_dev, int dev) | 
int d1 = g2_open_X11(100, 100); create first X11 window int d2 = g2_open_X11(100, 100); create 2nd X11 window int vd = g2_open_vd(); open a new virtual device g2_attach(vd, d1); attach d1 (1st window) to virtual device g2_attach(vd, d2); attach d2 (2nd window) to virtual device g2_plot(d1, 11, 11); output to the 1st X11 window g2_plot(d2, 12, 12); output to the 2nd X11 window g2_plot(vd, 13, 13); output to both X11 windows
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| Attach a device to virtual device vd_dev. 
 
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| Dettach a device from the virtual device vd_dev. 
 
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| Create a new virtual device. 
 
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 1.4.6
 1.4.6