49     struct fb_var_screeninfo info;  in main()  local
50     if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1)  in main()
53     info.reserved[0] = 0;  in main()
54     info.reserved[1] = 0;  in main()
55     info.reserved[2] = 0;  in main()
56     info.xoffset = 0;  in main()
57     info.yoffset = 0;  in main()
58     info.bits_per_pixel = 16;  in main()
59     info.activate = FB_ACTIVATE_NOW;  in main()
61     if (ioctl(fd, FBIOPUT_VSCREENINFO, &info) == -1) {  in main()
63                 info.xres_virtual, info.yres_virtual);  in main()
67     if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1)  in main()
70     uint64_t denominator = (uint64_t)( info.upper_margin + info.lower_margin + info.yres )  in main()
71                          * ( info.left_margin  + info.right_margin + info.xres )  in main()
72                          * info.pixclock;  in main()
75     float xdpi = (info.xres * 25.4f) / info.width;   in main()
76     float ydpi = (info.yres * 25.4f) / info.height;  in main()
91                 info.xres,  in main()
92                 info.yres,  in main()
93                 info.xres_virtual,  in main()
94                 info.yres_virtual,  in main()
95                 info.bits_per_pixel,  in main()
96                 info.red.offset, info.red.length,  in main()
97                 info.green.offset, info.green.length,  in main()
98                 info.blue.offset, info.blue.length  in main()
104                 info.width,  xdpi,  in main()
105                 info.height, ydpi,  in main()
110 …info.upper_margin, info.lower_margin, info.left_margin, info.right_margin, info.pixclock, finfo.sm…  in main()
133     memset(buffer, 0xff, 320*(info.yres_virtual/2)*2);  in main()
140     info.reserved[0] = 0x54445055; // "UPDT";  in main()
141     info.reserved[1] = (uint16_t)l | ((uint32_t)t << 16);  in main()
142     info.reserved[2] = (uint16_t)(l+w) | ((uint32_t)(t+h) << 16);  in main()
149         info.activate = FB_ACTIVATE_VBL;  in main()
150         info.yoffset = 0;  in main()
151         ioctl(fd, FBIOPUT_VSCREENINFO, &info);  in main()
153         info.activate = FB_ACTIVATE_VBL;  in main()
154         info.yoffset = info.yres_virtual/2;  in main()
155         err = ioctl(fd, FBIOPUT_VSCREENINFO, &info);  in main()