XFillRectangles(display, d, gc, rectangles, nrectangles)
      Display *display;
      Drawable d;
      GC gc;
      XRectangle *rectangles;
      int nrectangles;
| display | Specifies the connection to the X server. | 
| d | Specifies the drawable. | 
| gc | Specifies the GC. | 
| rectangles | Specifies an array of rectangles. | 
| nrectangles | Specifies the number of rectangles in the array. | 
[x,y] [x+width,y] [x+width,y+height] [x,y+height]
The function uses the x and y coordinates, width and height dimensions, and GC you specify.
XFillRectangles() fills the rectangles in the order listed in the array. For any given rectangle, XFillRectangles() does not draw a pixel more than once. If rectangles intersect, the intersecting pixels are drawn multiple times.
The function uses these GC components: function, plane-mask, fill-style, subwindow-mode, clip-x-origin, clip-y-origin, and clip-mask. They also use these GC mode-dependent components: foreground, background, tile, stipple, tile-stipple-x-origin, and tile-stipple-y-origin.
XFillRectangles() can generate BadDrawable , BadGC , and BadMatch errors.
| BadDrawable | A value for a Drawable argument does not name a defined Window or Pixmap. | 
| BadGC | A value for a GContext argument does not name a defined GContext. | 
| BadMatch | An InputOnly window is used as a Drawable. | 
| BadMatch | Some argument or pair of arguments has the correct type and range but fails to match in some other way required by the request. |