- state->grid_width = state->xgwa.width /(state->char_width * state->scale);
- state->grid_height = state->xgwa.height /(state->char_height * state->scale);
+ /* Would like to ensure here that
+ state->char_height * state->scale <= state->xgwa.height
+ but changing scale requires regenerating the bitmaps. */
+
+ state->grid_width = ((state->xgwa.width - state->xmargin * 2) /
+ (state->char_width * state->scale));
+ state->grid_height = ((state->xgwa.height - state->ymargin * 2) /
+ (state->char_height * state->scale));
+
+ if (state->grid_width < 2) state->grid_width = 2;
+ if (state->grid_height < 2) state->grid_height = 2;