void ctl_gfx_controller_set_window_at_0x50_0x51_0x52_0x53(CTL_GFX_CONTROLLER_t *self, int x, int y, int w, int h);
ctl_gfx_controller_set_window_at_0x50_0x51_0x52_0x53 issues the "set window" command to an Hitachi-like graphics controller with horizontal start/end registers at 0x50 and 0x51 and vertical start/end registers at 0x52 and 0x53.