unsigned int pixmap_w, pixmap_h;
/* Non-zero means characters in this face have a box that thickness
- around them. */
+ around them. If it is negative, the absolute value indicates the
+ thickness, and the horizontal lines of box (top and bottom) are
+ drawn inside of characters glyph area. The vartical lines of box
+ (left and right) are drawn as the same way as the case that this
+ value is positive. */
int box_line_width;
/* Type of box drawn. A value of FACE_NO_BOX means no box is drawn