I was curious, so I tried it myself and it works.
I made a simple test like this.
int main(int argc, char *argv[]) {
if(argc <=1 ){
printf("missing arguments\n");
exit(EXIT_FAILURE);
}
int x = atoi(argv[1]);
int y = atoi(argv[2]);
printf("H:= %d, V:= %d\n", x, y);
/*LittlevGL init*/
lv_init();
display_init(x,y);
...
}
and here' the display init taken from the example.
static void display_init(const int x, const int y) {
/*Linux frame buffer device init*/
fbdev_init();
/*Add a display to
* the LittlevGL for the frame buffer driver
*/
static lv_disp_buf_t disp_buf;
static lv_color_t buf_1[LV_HOR_RES_MAX * LV_VER_RES_MAX]; /*A screen sized buffer*/
static lv_color_t buf_2[LV_HOR_RES_MAX * LV_VER_RES_MAX]; /*Another screen sized buffer*/
lv_disp_buf_init(&disp_buf, buf_1, buf_2, LV_HOR_RES_MAX * LV_VER_RES_MAX); /*Initialize the display buffer*/
lv_disp_drv_t disp_drv;
lv_disp_drv_init(&disp_drv); /* Basic initialization */
/*Set the resolution of the display*/
disp_drv.hor_res = x;
disp_drv.ver_res = y;
/*Used to copy the buffer's content to the display*/
disp_drv.flush_cb = fbdev_flush;
/*Set a display buffer*/
disp_drv.buffer = &disp_buf;
lv_disp_drv_register(&disp_drv);
}
I did however get an error if I declare buf1 buf2 like this:
static lv_color_t buf_1[x*y];
for not being constant.