+struct ScreenModeInfo *get_screen_mode_from_string(char *screen_mode_string)
+{
+ static struct ScreenModeInfo screen_mode;
+ char *screen_mode_string_x = strchr(screen_mode_string, 'x');
+ char *screen_mode_string_copy;
+ char *screen_mode_string_pos_w;
+ char *screen_mode_string_pos_h;
+
+ if (screen_mode_string_x == NULL) /* invalid screen mode format */
+ return NULL;
+
+ screen_mode_string_copy = getStringCopy(screen_mode_string);
+
+ screen_mode_string_pos_w = screen_mode_string_copy;
+ screen_mode_string_pos_h = strchr(screen_mode_string_copy, 'x');
+ *screen_mode_string_pos_h++ = '\0';
+
+ screen_mode.width = atoi(screen_mode_string_pos_w);
+ screen_mode.height = atoi(screen_mode_string_pos_h);
+
+ return &screen_mode;
+}
+
+void get_aspect_ratio_from_screen_mode(struct ScreenModeInfo *screen_mode,
+ int *x, int *y)
+{
+ float aspect_ratio = (float)screen_mode->width / (float)screen_mode->height;
+ float aspect_ratio_new;
+ int i = 1;
+
+ do
+ {
+ *x = i * aspect_ratio + 0.000001;
+ *y = i;
+
+ aspect_ratio_new = (float)*x / (float)*y;
+
+ i++;
+ }
+ while (aspect_ratio_new != aspect_ratio && *y < screen_mode->height);
+}
+