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X11R7.4 - man page for xrectangle (x11r4 section 3)

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XDrawRectangle(3)			  XLIB FUNCTIONS			XDrawRectangle(3)

NAME
       XDrawRectangle, XDrawRectangles, XRectangle - draw rectangles and rectangles structure

SYNTAX
       int XDrawRectangle(Display *display, Drawable d, GC gc, int x, int y, unsigned int width,
	      unsigned int height);

       int XDrawRectangles(Display *display, Drawable d, GC gc, XRectangle rectangles[], int
	      nrectangles);

ARGUMENTS
       d	 Specifies the drawable.

       display	 Specifies the connection to the X server.

       gc	 Specifies the GC.

       nrectangles
		 Specifies the number of rectangles in the array.

       rectangles
		 Specifies an array of rectangles.

       width
       height	 Specify the width and height, which specify the dimensions of the rectangle.

       x
       y	 Specify the x and y coordinates, which specify the upper-left corner of the rec-
		 tangle.

DESCRIPTION
       The XDrawRectangle and XDrawRectangles functions draw the outlines of the specified rec-
       tangle or rectangles as if a five-point PolyLine protocol request were specified for each
       rectangle:

	      [x,y] [x+width,y] [x+width,y+height] [x,y+height] [x,y]

       For the specified rectangle or rectangles, these functions do not draw a pixel more than
       once.  XDrawRectangles draws the rectangles in the order listed in the array.  If rectan-
       gles intersect, the intersecting pixels are drawn multiple times.

       Both functions use these GC components: function, plane-mask, line-width, line-style, cap-
       style, join-style, 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, tile-stipple-y-origin, dash-offset, and dash-list.

       XDrawRectangle and XDrawRectangles can generate BadDrawable, BadGC, and BadMatch errors.

STRUCTURES
       The XRectangle structure contains:

       typedef struct {
	    short x, y;
	    unsigned short width, height;
       } XRectangle;

       All x and y members are signed integers.  The width and height members are 16-bit unsigned
       integers.  You should be careful not to generate coordinates and sizes out of the 16-bit
       ranges, because the protocol only has 16-bit fields for these values.

DIAGNOSTICS
       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.

SEE ALSO
       XDrawArc(3X11), XDrawLine(3X11), XDrawPoint(3X11)
       Xlib - C Language X Interface

X Version 11				   libX11 1.2.1 			XDrawRectangle(3)
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